From: Junio C Hamano <gitster@pobox.com>
Date: Sat, 29 Aug 2009 02:39:26 +0000 (-0700)
Subject: Merge branch 'mm/reset-report'
X-Git-Tag: v1.6.5-rc0~23
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/235db154f8b92e53b97ffb93725d394b6e20f398?hp=3deffc52d88df73af72a80a406eb863880bb4d2a

Merge branch 'mm/reset-report'

* mm/reset-report:
reset: make the reminder output consistent with "checkout"
Rename REFRESH_SAY_CHANGED to REFRESH_IN_PORCELAIN.
---

diff --git a/.gitignore b/.gitignore
index 41c0b20a76..10808e3a73 100644
--- a/.gitignore
+++ b/.gitignore
@@ -105,6 +105,7 @@ git-reflog
 git-relink
 git-remote
 git-repack
+git-replace
 git-repo-config
 git-request-pull
 git-rerere
diff --git a/Documentation/RelNotes-1.6.4.1.txt b/Documentation/RelNotes-1.6.4.1.txt
new file mode 100644
index 0000000000..e439e45b96
--- /dev/null
+++ b/Documentation/RelNotes-1.6.4.1.txt
@@ -0,0 +1,46 @@
+GIT v1.6.4.1 Release Notes
+==========================
+
+Fixes since v1.6.4
+------------------
+
+ * An unquoted value in the configuration file, when it contains more than
+   one whitespaces in a row, got them replaced with a single space.
+
+ * "git am" used to accept a single piece of e-mail per file (not a mbox)
+   as its input, but multiple input format support in v1.6.4 broke it.
+   Apparently many people have been depending on this feature.
+
+ * The short help text for "git filter-branch" command was a single long
+   line, wrapped by terminals, and was hard to read.
+
+ * The "recursive" strategy of "git merge" segfaulted when a merge has
+   more than one merge-bases, and merging of these merge-bases involves
+   a rename/rename or a rename/add conflict.
+
+ * "git pull --rebase" did not use the right fork point when the
+   repository has already fetched from the upstream that rewinds the
+   branch it is based on in an earlier fetch.
+
+ * Explain the concept of fast-forward more fully in "git push"
+   documentation, and hint to refer to it from an error message when the
+   command refuses an update to protect the user.
+
+ * The default value for pack.deltacachesize, used by "git repack", is now
+   256M, instead of unbounded.  Otherwise a repack of a moderately sized
+   repository would needlessly eat into swap.
+
+ * Document how "git repack" (hence "git gc") interacts with a repository
+   that borrows its objects from other repositories (e.g. ones created by
+   "git clone -s").
+
+ * "git show" on an annotated tag lacked a delimiting blank line between
+   the tag itself and the contents of the object it tags.
+
+ * "git verify-pack -v" erroneously reported number of objects with too
+   deep delta depths as "chain length 0" objects.
+
+ * Long names of authors and committers outside US-ASCII were sometimes
+   incorrectly shown in "gitweb".
+
+Other minor documentation updates are included.
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 2632c5149e..5256c7fb81 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -461,6 +461,14 @@ it will be treated as a shell command.  For example, defining
 executed from the top-level directory of a repository, which may
 not necessarily be the current directory.
 
+apply.ignorewhitespace::
+	When set to 'change', tells 'git-apply' to ignore changes in
+	whitespace, in the same way as the '--ignore-space-change'
+	option.
+	When set to one of: no, none, never, false tells 'git-apply' to
+	respect all whitespace differences.
+	See linkgit:git-apply[1].
+
 apply.whitespace::
 	Tells 'git-apply' how to handle whitespaces, in the same way
 	as the '--whitespace' option. See linkgit:git-apply[1].
diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt
index 32e689b2bf..fcacc94650 100644
--- a/Documentation/git-am.txt
+++ b/Documentation/git-am.txt
@@ -11,7 +11,7 @@ SYNOPSIS
 [verse]
 'git am' [--signoff] [--keep] [--utf8 | --no-utf8]
 	 [--3way] [--interactive] [--committer-date-is-author-date]
-	 [--ignore-date]
+	 [--ignore-date] [--ignore-space-change | --ignore-whitespace]
 	 [--whitespace=<option>] [-C<n>] [-p<n>] [--directory=<dir>]
 	 [--reject] [-q | --quiet]
 	 [<mbox> | <Maildir>...]
@@ -65,6 +65,9 @@ default.   You can use `--no-utf8` to override this.
 	it is supposed to apply to and we have those blobs
 	available locally.
 
+--ignore-date::
+--ignore-space-change::
+--ignore-whitespace::
 --whitespace=<option>::
 -C<n>::
 -p<n>::
diff --git a/Documentation/git-apply.txt b/Documentation/git-apply.txt
index 735374d7df..5ee8c91f2d 100644
--- a/Documentation/git-apply.txt
+++ b/Documentation/git-apply.txt
@@ -13,6 +13,7 @@ SYNOPSIS
 	  [--apply] [--no-add] [--build-fake-ancestor=<file>] [-R | --reverse]
 	  [--allow-binary-replacement | --binary] [--reject] [-z]
 	  [-pNUM] [-CNUM] [--inaccurate-eof] [--recount] [--cached]
+	  [--ignore-space-change | --ignore-whitespace ]
 	  [--whitespace=<nowarn|warn|fix|error|error-all>]
 	  [--exclude=PATH] [--include=PATH] [--directory=<root>]
 	  [--verbose] [<patch>...]
@@ -149,6 +150,14 @@ patch to each path is used.  A patch to a path that does not match any
 include/exclude pattern is used by default if there is no include pattern
 on the command line, and ignored if there is any include pattern.
 
+--ignore-space-change::
+--ignore-whitespace::
+	When applying a patch, ignore changes in whitespace in context
+	lines if necessary.
+	Context lines will preserve their whitespace, and they will not
+	undergo whitespace fixing regardless of the value of the
+	`--whitespace` option. New lines will still be fixed, though.
+
 --whitespace=<action>::
 	When applying a patch, detect a new or modified line that has
 	whitespace errors.  What are considered whitespace errors is
@@ -205,6 +214,10 @@ running `git apply --directory=modules/git-gui`.
 Configuration
 -------------
 
+apply.ignorewhitespace::
+	Set to 'change' if you want changes in whitespace to be ignored by default.
+	Set to one of: no, none, never, false if you want changes in
+	whitespace to be significant.
 apply.whitespace::
 	When no `--whitespace` flag is given from the command
 	line, this configuration item is used as the default.
diff --git a/Documentation/git-archive.txt b/Documentation/git-archive.txt
index bc132c87e1..92444ddf10 100644
--- a/Documentation/git-archive.txt
+++ b/Documentation/git-archive.txt
@@ -9,7 +9,7 @@ git-archive - Create an archive of files from a named tree
 SYNOPSIS
 --------
 [verse]
-'git archive' --format=<fmt> [--list] [--prefix=<prefix>/] [<extra>]
+'git archive' [--format=<fmt>] [--list] [--prefix=<prefix>/] [<extra>]
 	      [--output=<file>] [--worktree-attributes]
 	      [--remote=<repo> [--exec=<git-upload-archive>]] <tree-ish>
 	      [path...]
diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt
index ae201deb7a..99988872eb 100644
--- a/Documentation/git-branch.txt
+++ b/Documentation/git-branch.txt
@@ -209,6 +209,12 @@ but different purposes:
 - `--no-merged` is used to find branches which are candidates for merging
   into HEAD, since those branches are not fully contained by HEAD.
 
+SEE ALSO
+--------
+linkgit:git-check-ref-format[1],
+linkgit:git-fetch[1],
+linkgit:git-remote[1].
+
 Author
 ------
 Written by Linus Torvalds <torvalds@osdl.org> and Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-clone.txt b/Documentation/git-clone.txt
index 2c63a0fbae..88ea272ee5 100644
--- a/Documentation/git-clone.txt
+++ b/Documentation/git-clone.txt
@@ -12,7 +12,7 @@ SYNOPSIS
 'git clone' [--template=<template_directory>]
 	  [-l] [-s] [--no-hardlinks] [-q] [-n] [--bare] [--mirror]
 	  [-o <name>] [-u <upload-pack>] [--reference <repository>]
-	  [--depth <depth>] [--] <repository> [<directory>]
+	  [--depth <depth>] [--recursive] [--] <repository> [<directory>]
 
 DESCRIPTION
 -----------
@@ -147,6 +147,14 @@ objects from the source repository into a pack in the cloned repository.
 	with a long history, and would want to send in fixes
 	as patches.
 
+--recursive::
+	After the clone is created, initialize all submodules within,
+	using their default settings. This is equivalent to running
+	'git submodule update --init --recursive' immediately after
+	the clone is finished. This option is ignored if the cloned
+	repository does not have a worktree/checkout (i.e. if any of
+	`--no-checkout`/`-n`, `--bare`, or `--mirror` is given)
+
 <repository>::
 	The (possibly remote) repository to clone from.  See the
 	<<URLS,URLS>> section below for more information on specifying
diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index b5d81be7ec..64f94cfe12 100644
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -8,8 +8,8 @@ git-commit - Record changes to the repository
 SYNOPSIS
 --------
 [verse]
-'git commit' [-a | --interactive] [-s] [-v] [-u<mode>] [--amend]
-	   [(-c | -C) <commit>] [-F <file> | -m <msg>]
+'git commit' [-a | --interactive] [-s] [-v] [-u<mode>] [--amend] [--dry-run]
+	   [(-c | -C) <commit>] [-F <file> | -m <msg>] [--dry-run]
 	   [--allow-empty] [--no-verify] [-e] [--author=<author>]
 	   [--cleanup=<mode>] [--] [[-i | -o ]<file>...]
 
@@ -42,10 +42,9 @@ The content to be added can be specified in several ways:
    by one which files should be part of the commit, before finalizing the
    operation.  Currently, this is done by invoking 'git-add --interactive'.
 
-The 'git-status' command can be used to obtain a
+The `--dry-run` option can be used to obtain a
 summary of what is included by any of the above for the next
-commit by giving the same set of parameters you would give to
-this command.
+commit by giving the same set of parameters (options and paths).
 
 If you make a commit and then find a mistake immediately after
 that, you can recover from it with 'git-reset'.
@@ -70,6 +69,12 @@ OPTIONS
 	Like '-C', but with '-c' the editor is invoked, so that
 	the user can further edit the commit message.
 
+--dry-run::
+	Do not actually make a commit, but show the list of paths
+	with updates in the index, paths with changes in the work tree,
+	and paths that are untracked, similar to the one that is given
+	in the commit log editor.
+
 -F <file>::
 --file=<file>::
 	Take the commit message from the given file.  Use '-' to
@@ -198,6 +203,11 @@ specified.
 --quiet::
 	Suppress commit summary message.
 
+--dry-run::
+	Do not create a commit, but show a list of paths that are
+	to be committed, paths with local changes that will be left
+	uncommitted and paths that are untracked.
+
 \--::
 	Do not interpret any more arguments as options.
 
diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt
index b292e9843a..dcac8c8e29 100644
--- a/Documentation/git-gc.txt
+++ b/Documentation/git-gc.txt
@@ -61,7 +61,7 @@ automatic consolidation of packs.
 
 --prune=<date>::
 	Prune loose objects older than date (default is 2 weeks ago,
-	overrideable by the config variable `gc.pruneExpire`).  This
+	overridable by the config variable `gc.pruneExpire`).  This
 	option is on by default.
 
 --no-prune::
diff --git a/Documentation/git-instaweb.txt b/Documentation/git-instaweb.txt
index 22da21a54f..0771f25443 100644
--- a/Documentation/git-instaweb.txt
+++ b/Documentation/git-instaweb.txt
@@ -29,7 +29,7 @@ OPTIONS
 	The HTTP daemon command-line that will be executed.
 	Command-line options may be specified here, and the
 	configuration file will be added at the end of the command-line.
-	Currently lighttpd, apache2 and webrick are supported.
+	Currently apache2, lighttpd, mongoose and webrick are supported.
 	(Default: lighttpd)
 
 -m::
diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt
index 34cf4e5811..3d79de11ec 100644
--- a/Documentation/git-log.txt
+++ b/Documentation/git-log.txt
@@ -37,8 +37,12 @@ include::diff-options.txt[]
 	and <until>, see "SPECIFYING REVISIONS" section in
 	linkgit:git-rev-parse[1].
 
---decorate::
-	Print out the ref names of any commits that are shown.
+--decorate[=short|full]::
+	Print out the ref names of any commits that are shown. If 'short' is
+	specified, the ref name prefixes 'refs/heads/', 'refs/tags/' and
+	'refs/remotes/' will not be printed. If 'full' is specified, the
+	full ref name (including prefix) will be printed. The default option
+	is 'short'.
 
 --source::
 	Print out the ref name given on the command line by which each
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index db1b71d248..0aefc34d0d 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -268,8 +268,9 @@ OPTIONS
 	exit with the message "Current branch is up to date" in such a
 	situation.
 
+--ignore-whitespace::
 --whitespace=<option>::
-	This flag is passed to the 'git-apply' program
+	These flag are passed to the 'git-apply' program
 	(see linkgit:git-apply[1]) that applies the patch.
 	Incompatible with the --interactive option.
 
diff --git a/Documentation/git-replace.txt b/Documentation/git-replace.txt
new file mode 100644
index 0000000000..915cb77b29
--- /dev/null
+++ b/Documentation/git-replace.txt
@@ -0,0 +1,71 @@
+git-replace(1)
+==============
+
+NAME
+----
+git-replace - Create, list, delete refs to replace objects
+
+SYNOPSIS
+--------
+[verse]
+'git replace' [-f] <object> <replacement>
+'git replace' -d <object>...
+'git replace' -l [<pattern>]
+
+DESCRIPTION
+-----------
+Adds a 'replace' reference in `.git/refs/replace/`
+
+The name of the 'replace' reference is the SHA1 of the object that is
+replaced. The content of the replace reference is the SHA1 of the
+replacement object.
+
+Unless `-f` is given, the replace reference must not yet exist in
+`.git/refs/replace/` directory.
+
+OPTIONS
+-------
+-f::
+	If an existing replace ref for the same object exists, it will
+	be overwritten (instead of failing).
+
+-d::
+	Delete existing replace refs for the given objects.
+
+-l <pattern>::
+	List replace refs for objects that match the given pattern (or
+	all if no pattern is given).
+	Typing "git replace" without arguments, also lists all replace
+	refs.
+
+BUGS
+----
+Comparing blobs or trees that have been replaced with those that
+replace them will not work properly. And using 'git reset --hard' to
+go back to a replaced commit will move the branch to the replacement
+commit instead of the replaced commit.
+
+There may be other problems when using 'git rev-list' related to
+pending objects. And of course things may break if an object of one
+type is replaced by an object of another type (for example a blob
+replaced by a commit).
+
+SEE ALSO
+--------
+linkgit:git-tag[1]
+linkgit:git-branch[1]
+
+Author
+------
+Written by Christian Couder <chriscool@tuxfamily.org> and Junio C
+Hamano <gitster@pobox.com>, based on 'git tag' by Kristian Hogsberg
+<krh@redhat.com> and Carlos Rica <jasampler@gmail.com>.
+
+Documentation
+--------------
+Documentation by Christian Couder <chriscool@tuxfamily.org> and the
+git-list <git@vger.kernel.org>, based on 'git tag' documentation.
+
+GIT
+---
+Part of the linkgit:git[1] suite
diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index 7dd73ae14e..5ccdd18c89 100644
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -11,12 +11,12 @@ SYNOPSIS
 [verse]
 'git submodule' [--quiet] add [-b branch]
 	      [--reference <repository>] [--] <repository> <path>
-'git submodule' [--quiet] status [--cached] [--] [<path>...]
+'git submodule' [--quiet] status [--cached] [--recursive] [--] [<path>...]
 'git submodule' [--quiet] init [--] [<path>...]
 'git submodule' [--quiet] update [--init] [-N|--no-fetch] [--rebase]
-	      [--reference <repository>] [--merge] [--] [<path>...]
-'git submodule' [--quiet] summary [--cached] [--summary-limit <n>] [commit] [--] [<path>...]
-'git submodule' [--quiet] foreach <command>
+	      [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
+'git submodule' [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
+'git submodule' [--quiet] foreach [--recursive] <command>
 'git submodule' [--quiet] sync [--] [<path>...]
 
 
@@ -100,6 +100,9 @@ status::
 	initialized and `+` if the currently checked out submodule commit
 	does not match the SHA-1 found in the index of the containing
 	repository. This command is the default command for 'git-submodule'.
++
+If '--recursive' is specified, this command will recurse into nested
+submodules, and show their status as well.
 
 init::
 	Initialize the submodules, i.e. register each submodule name
@@ -122,21 +125,31 @@ update::
 If the submodule is not yet initialized, and you just want to use the
 setting as stored in .gitmodules, you can automatically initialize the
 submodule with the --init option.
++
+If '--recursive' is specified, this command will recurse into the
+registered submodules, and update any nested submodules within.
 
 summary::
 	Show commit summary between the given commit (defaults to HEAD) and
 	working tree/index. For a submodule in question, a series of commits
 	in the submodule between the given super project commit and the
-	index or working tree (switched by --cached) are shown.
+	index or working tree (switched by --cached) are shown. If the option
+	--files is given, show the series of commits in the submodule between
+	the index of the super project and the working tree of the submodule
+	(this option doesn't allow to use the --cached option or to provide an
+	explicit commit).
 
 foreach::
 	Evaluates an arbitrary shell command in each checked out submodule.
-	The command has access to the variables $path and $sha1:
+	The command has access to the variables $name, $path and $sha1:
+	$name is the name of the relevant submodule section in .gitmodules,
 	$path is the name of the submodule directory relative to the
 	superproject, and $sha1 is the commit as recorded in the superproject.
 	Any submodules defined in the superproject but not checked out are
 	ignored by this command. Unless given --quiet, foreach prints the name
 	of each submodule before evaluating the command.
+	If --recursive is given, submodules are traversed recursively (i.e.
+	the given shell command is evaluated in nested submodules as well).
 	A non-zero return from the command in any submodule causes
 	the processing to terminate. This can be overridden by adding '|| :'
 	to the end of the command.
@@ -169,6 +182,11 @@ OPTIONS
 	commands typically use the commit found in the submodule HEAD, but
 	with this option, the commit stored in the index is used instead.
 
+--files::
+	This option is only valid for the summary command. This command
+	compares the commit in the index with that in the submodule HEAD
+	when this option is used.
+
 -n::
 --summary-limit::
 	This option is only valid for the summary command.
@@ -209,6 +227,12 @@ OPTIONS
 *NOTE*: Do *not* use this option unless you have read the note
 for linkgit:git-clone[1]'s --reference and --shared options carefully.
 
+--recursive::
+	This option is only valid for foreach, update and status commands.
+	Traverse submodules recursively. The operation is performed not
+	only in the submodules of the current repo, but also
+	in any nested submodules inside those submodules (and so on).
+
 <path>...::
 	Paths to submodule(s). When specified this will restrict the command
 	to only operate on the submodules found at the specified paths.
diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt
index 1118ce22dc..5113eaec62 100644
--- a/Documentation/git-tag.txt
+++ b/Documentation/git-tag.txt
@@ -10,17 +10,15 @@ SYNOPSIS
 --------
 [verse]
 'git tag' [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>]
-	<name> [<commit> | <object>]
-'git tag' -d <name>...
+	<tagname> [<commit> | <object>]
+'git tag' -d <tagname>...
 'git tag' [-n[<num>]] -l [--contains <commit>] [<pattern>]
-'git tag' -v <name>...
+'git tag' -v <tagname>...
 
 DESCRIPTION
 -----------
 
-Adds a 'tag' reference in `.git/refs/tags/`.  The tag <name> must pass
-linkgit:git-check-ref-format[1] which basicly means that control characters,
-space, ~, ^, :, ?, *, [ and \ are prohibited.
+Adds a tag reference in `.git/refs/tags/`.
 
 Unless `-f` is given, the tag must not yet exist in
 `.git/refs/tags/` directory.
@@ -88,6 +86,12 @@ OPTIONS
 	Implies `-a` if none of `-a`, `-s`, or `-u <key-id>`
 	is given.
 
+<tagname>::
+	The name of the tag to create, delete, or describe.
+	The new tag name must pass all checks defined by
+	linkgit:git-check-ref-format[1].  Some of these checks
+	may restrict the characters allowed in a tag name.
+
 CONFIGURATION
 -------------
 By default, 'git-tag' in sign-with-default mode (-s) will use your
@@ -252,6 +256,10 @@ $ GIT_COMMITTER_DATE="2006-10-02 10:31" git tag -s v1.0.1
 ------------
 
 
+SEE ALSO
+--------
+linkgit:git-check-ref-format[1].
+
 Author
 ------
 Written by Linus Torvalds <torvalds@osdl.org>,
diff --git a/Documentation/git-verify-pack.txt b/Documentation/git-verify-pack.txt
index d791a80819..97f7f9165e 100644
--- a/Documentation/git-verify-pack.txt
+++ b/Documentation/git-verify-pack.txt
@@ -25,7 +25,13 @@ OPTIONS
 -v::
 --verbose::
 	After verifying the pack, show list of objects contained
-	in the pack.
+	in the pack and a histogram of delta chain length.
+
+-s::
+--stat-only::
+	Do not verify the pack contents; only show the histogram of delta
+	chain length.  With `--verbose`, list of objects is also shown.
+
 \--::
 	Do not interpret any more arguments as options.
 
diff --git a/Documentation/git-write-tree.txt b/Documentation/git-write-tree.txt
index 26d3850e73..c8899d528a 100644
--- a/Documentation/git-write-tree.txt
+++ b/Documentation/git-write-tree.txt
@@ -12,7 +12,8 @@ SYNOPSIS
 
 DESCRIPTION
 -----------
-Creates a tree object using the current index.
+Creates a tree object using the current index. The name of the new
+tree object is printed to standard output.
 
 The index must be in a fully merged state.
 
diff --git a/Documentation/git.txt b/Documentation/git.txt
index 5832c752e1..a9bacfbef4 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -43,9 +43,10 @@ unreleased) version of git, that is available from 'master'
 branch of the `git.git` repository.
 Documentation for older releases are available here:
 
-* link:v1.6.4/git.html[documentation for release 1.6.4]
+* link:v1.6.4.1/git.html[documentation for release 1.6.4.1]
 
 * release notes for
+  link:RelNotes-1.6.4.1.txt[1.6.4.1],
   link:RelNotes-1.6.4.txt[1.6.4].
 
 * link:v1.6.3.4/git.html[documentation for release 1.6.3.4]
diff --git a/Makefile b/Makefile
index e6df8ecde6..d842e52ac3 100644
--- a/Makefile
+++ b/Makefile
@@ -16,7 +16,7 @@ all::
 # when attempting to read from an fopen'ed directory.
 #
 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
-# This also implies MOZILLA_SHA1.
+# This also implies BLK_SHA1.
 #
 # Define NO_CURL if you do not have libcurl installed.  git-http-pull and
 # git-http-push are not built, and you cannot use http:// and https://
@@ -91,14 +91,6 @@ all::
 # Define PPC_SHA1 environment variable when running make to make use of
 # a bundled SHA1 routine optimized for PowerPC.
 #
-# Define ARM_SHA1 environment variable when running make to make use of
-# a bundled SHA1 routine optimized for ARM.
-#
-# Define MOZILLA_SHA1 environment variable when running make to make use of
-# a bundled SHA1 routine coming from Mozilla. It is GPL'd and should be fast
-# on non-x86 architectures (e.g. PowerPC), while the OpenSSL version (default
-# choice) has very fast version optimized for i586.
-#
 # Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
 #
 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin).
@@ -536,6 +528,7 @@ LIB_OBJS += read-cache.o
 LIB_OBJS += reflog-walk.o
 LIB_OBJS += refs.o
 LIB_OBJS += remote.o
+LIB_OBJS += replace_object.o
 LIB_OBJS += rerere.o
 LIB_OBJS += revision.o
 LIB_OBJS += run-command.o
@@ -625,6 +618,7 @@ BUILTIN_OBJS += builtin-read-tree.o
 BUILTIN_OBJS += builtin-receive-pack.o
 BUILTIN_OBJS += builtin-reflog.o
 BUILTIN_OBJS += builtin-remote.o
+BUILTIN_OBJS += builtin-replace.o
 BUILTIN_OBJS += builtin-rerere.o
 BUILTIN_OBJS += builtin-reset.o
 BUILTIN_OBJS += builtin-rev-list.o
@@ -755,9 +749,6 @@ ifeq ($(uname_S),SunOS)
 		NO_C99_FORMAT = YesPlease
 		NO_STRTOUMAX = YesPlease
 	endif
-	ifdef NO_IPV6
-		NEEDS_RESOLV = YesPlease
-	endif
 	INSTALL = /usr/ucb/install
 	TAR = gtar
 	BASIC_CFLAGS += -D__EXTENSIONS__ -D__sun__ -DHAVE_ALLOCA_H
@@ -926,10 +917,6 @@ else
 	NO_PTHREADS = YesPlease
 endif
 endif
-ifneq (,$(findstring arm,$(uname_M)))
-	ARM_SHA1 = YesPlease
-	NO_MKSTEMPS = YesPlease
-endif
 
 -include config.mak.autogen
 -include config.mak
@@ -1022,7 +1009,7 @@ ifndef NO_OPENSSL
 	endif
 else
 	BASIC_CFLAGS += -DNO_OPENSSL
-	MOZILLA_SHA1 = 1
+	BLK_SHA1 = 1
 	OPENSSL_LIBSSL =
 endif
 ifdef NEEDS_SSL_WITH_CRYPTO
@@ -1178,21 +1165,11 @@ else
 ifdef PPC_SHA1
 	SHA1_HEADER = "ppc/sha1.h"
 	LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o
-else
-ifdef ARM_SHA1
-	SHA1_HEADER = "arm/sha1.h"
-	LIB_OBJS += arm/sha1.o arm/sha1_arm.o
-else
-ifdef MOZILLA_SHA1
-	SHA1_HEADER = "mozilla-sha1/sha1.h"
-	LIB_OBJS += mozilla-sha1/sha1.o
 else
 	SHA1_HEADER = <openssl/sha.h>
 	EXTLIBS += $(LIB_4_CRYPTO)
 endif
 endif
-endif
-endif
 ifdef NO_PERL_MAKEMAKER
 	export NO_PERL_MAKEMAKER
 endif
diff --git a/abspath.c b/abspath.c
index 4bee0ba1ec..b88122cbe7 100644
--- a/abspath.c
+++ b/abspath.c
@@ -18,7 +18,7 @@ const char *make_absolute_path(const char *path)
 {
 	static char bufs[2][PATH_MAX + 1], *buf = bufs[0], *next_buf = bufs[1];
 	char cwd[1024] = "";
-	int buf_index = 1, len;
+	int buf_index = 1;
 
 	int depth = MAXDEPTH;
 	char *last_elem = NULL;
@@ -50,7 +50,7 @@ const char *make_absolute_path(const char *path)
 			die_errno ("Could not get current working directory");
 
 		if (last_elem) {
-			int len = strlen(buf);
+			size_t len = strlen(buf);
 			if (len + strlen(last_elem) + 2 > PATH_MAX)
 				die ("Too long path name: '%s/%s'",
 						buf, last_elem);
@@ -61,7 +61,7 @@ const char *make_absolute_path(const char *path)
 		}
 
 		if (!lstat(buf, &st) && S_ISLNK(st.st_mode)) {
-			len = readlink(buf, next_buf, PATH_MAX);
+			ssize_t len = readlink(buf, next_buf, PATH_MAX);
 			if (len < 0)
 				die_errno ("Invalid symlink '%s'", buf);
 			if (PATH_MAX <= len)
diff --git a/arm/sha1.c b/arm/sha1.c
deleted file mode 100644
index c61ad4aff9..0000000000
--- a/arm/sha1.c
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * SHA-1 implementation optimized for ARM
- *
- * Copyright:   (C) 2005 by Nicolas Pitre <nico@cam.org>
- * Created:     September 17, 2005
- */
-
-#include <string.h>
-#include "sha1.h"
-
-extern void arm_sha_transform(uint32_t *hash, const unsigned char *data, uint32_t *W);
-
-void arm_SHA1_Init(arm_SHA_CTX *c)
-{
-	c->len = 0;
-	c->hash[0] = 0x67452301;
-	c->hash[1] = 0xefcdab89;
-	c->hash[2] = 0x98badcfe;
-	c->hash[3] = 0x10325476;
-	c->hash[4] = 0xc3d2e1f0;
-}
-
-void arm_SHA1_Update(arm_SHA_CTX *c, const void *p, unsigned long n)
-{
-	uint32_t workspace[80];
-	unsigned int partial;
-	unsigned long done;
-
-	partial = c->len & 0x3f;
-	c->len += n;
-	if ((partial + n) >= 64) {
-		if (partial) {
-			done = 64 - partial;
-			memcpy(c->buffer + partial, p, done);
-			arm_sha_transform(c->hash, c->buffer, workspace);
-			partial = 0;
-		} else
-			done = 0;
-		while (n >= done + 64) {
-			arm_sha_transform(c->hash, p + done, workspace);
-			done += 64;
-		}
-	} else
-		done = 0;
-	if (n - done)
-		memcpy(c->buffer + partial, p + done, n - done);
-}
-
-void arm_SHA1_Final(unsigned char *hash, arm_SHA_CTX *c)
-{
-	uint64_t bitlen;
-	uint32_t bitlen_hi, bitlen_lo;
-	unsigned int i, offset, padlen;
-	unsigned char bits[8];
-	static const unsigned char padding[64] = { 0x80, };
-
-	bitlen = c->len << 3;
-	offset = c->len & 0x3f;
-	padlen = ((offset < 56) ? 56 : (64 + 56)) - offset;
-	arm_SHA1_Update(c, padding, padlen);
-
-	bitlen_hi = bitlen >> 32;
-	bitlen_lo = bitlen & 0xffffffff;
-	bits[0] = bitlen_hi >> 24;
-	bits[1] = bitlen_hi >> 16;
-	bits[2] = bitlen_hi >> 8;
-	bits[3] = bitlen_hi;
-	bits[4] = bitlen_lo >> 24;
-	bits[5] = bitlen_lo >> 16;
-	bits[6] = bitlen_lo >> 8;
-	bits[7] = bitlen_lo;
-	arm_SHA1_Update(c, bits, 8);
-
-	for (i = 0; i < 5; i++) {
-		uint32_t v = c->hash[i];
-		hash[0] = v >> 24;
-		hash[1] = v >> 16;
-		hash[2] = v >> 8;
-		hash[3] = v;
-		hash += 4;
-	}
-}
diff --git a/arm/sha1.h b/arm/sha1.h
deleted file mode 100644
index b61b618486..0000000000
--- a/arm/sha1.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
- * SHA-1 implementation optimized for ARM
- *
- * Copyright:	(C) 2005 by Nicolas Pitre <nico@cam.org>
- * Created:	September 17, 2005
- */
-
-#include <stdint.h>
-
-typedef struct {
-	uint64_t len;
-	uint32_t hash[5];
-	unsigned char buffer[64];
-} arm_SHA_CTX;
-
-void arm_SHA1_Init(arm_SHA_CTX *c);
-void arm_SHA1_Update(arm_SHA_CTX *c, const void *p, unsigned long n);
-void arm_SHA1_Final(unsigned char *hash, arm_SHA_CTX *c);
-
-#define git_SHA_CTX	arm_SHA_CTX
-#define git_SHA1_Init	arm_SHA1_Init
-#define git_SHA1_Update	arm_SHA1_Update
-#define git_SHA1_Final	arm_SHA1_Final
diff --git a/arm/sha1_arm.S b/arm/sha1_arm.S
deleted file mode 100644
index 41e92636e0..0000000000
--- a/arm/sha1_arm.S
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
- *  SHA transform optimized for ARM
- *
- *  Copyright:	(C) 2005 by Nicolas Pitre <nico@cam.org>
- *  Created:	September 17, 2005
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as
- *  published by the Free Software Foundation.
- */
-
-	.text
-	.globl	arm_sha_transform
-
-/*
- * void sha_transform(uint32_t *hash, const unsigned char *data, uint32_t *W);
- *
- * note: the "data" pointer may be unaligned.
- */
-
-arm_sha_transform:
-
-	stmfd	sp!, {r4 - r8, lr}
-
-	@ for (i = 0; i < 16; i++)
-	@         W[i] = ntohl(((uint32_t *)data)[i]);
-
-#ifdef __ARMEB__
-	mov	r4, r0
-	mov	r0, r2
-	mov	r2, #64
-	bl	memcpy
-	mov	r2, r0
-	mov	r0, r4
-#else
-	mov	r3, r2
-	mov	lr, #16
-1:	ldrb	r4, [r1], #1
-	ldrb	r5, [r1], #1
-	ldrb	r6, [r1], #1
-	ldrb	r7, [r1], #1
-	subs	lr, lr, #1
-	orr	r5, r5, r4, lsl #8
-	orr	r6, r6, r5, lsl #8
-	orr	r7, r7, r6, lsl #8
-	str	r7, [r3], #4
-	bne	1b
-#endif
-
-	@ for (i = 0; i < 64; i++)
-	@         W[i+16] = ror(W[i+13] ^ W[i+8] ^ W[i+2] ^ W[i], 31);
-
-	sub	r3, r2, #4
-	mov	lr, #64
-2:	ldr	r4, [r3, #4]!
-	subs	lr, lr, #1
-	ldr	r5, [r3, #8]
-	ldr	r6, [r3, #32]
-	ldr	r7, [r3, #52]
-	eor	r4, r4, r5
-	eor	r4, r4, r6
-	eor	r4, r4, r7
-	mov	r4, r4, ror #31
-	str	r4, [r3, #64]
-	bne	2b
-
-	/*
-	 * The SHA functions are:
-	 *
-	 * f1(B,C,D) = (D ^ (B & (C ^ D)))
-	 * f2(B,C,D) = (B ^ C ^ D)
-	 * f3(B,C,D) = ((B & C) | (D & (B | C)))
-	 *
-	 * Then the sub-blocks are processed as follows:
-	 *
-	 * A' = ror(A, 27) + f(B,C,D) + E + K + *W++
-	 * B' = A
-	 * C' = ror(B, 2)
-	 * D' = C
-	 * E' = D
-	 *
-	 * We therefore unroll each loop 5 times to avoid register shuffling.
-	 * Also the ror for C (and also D and E which are successivelyderived
-	 * from it) is applied in place to cut on an additional mov insn for
-	 * each round.
-	 */
-
-	.macro	sha_f1, A, B, C, D, E
-	ldr	r3, [r2], #4
-	eor	ip, \C, \D
-	add	\E, r1, \E, ror #2
-	and	ip, \B, ip, ror #2
-	add	\E, \E, \A, ror #27
-	eor	ip, ip, \D, ror #2
-	add	\E, \E, r3
-	add	\E, \E, ip
-	.endm
-
-	.macro	sha_f2, A, B, C, D, E
-	ldr	r3, [r2], #4
-	add	\E, r1, \E, ror #2
-	eor	ip, \B, \C, ror #2
-	add	\E, \E, \A, ror #27
-	eor	ip, ip, \D, ror #2
-	add	\E, \E, r3
-	add	\E, \E, ip
-	.endm
-
-	.macro	sha_f3, A, B, C, D, E
-	ldr	r3, [r2], #4
-	add	\E, r1, \E, ror #2
-	orr	ip, \B, \C, ror #2
-	add	\E, \E, \A, ror #27
-	and	ip, ip, \D, ror #2
-	add	\E, \E, r3
-	and	r3, \B, \C, ror #2
-	orr	ip, ip, r3
-	add	\E, \E, ip
-	.endm
-
-	ldmia	r0, {r4 - r8}
-
-	mov	lr, #4
-	ldr	r1, .L_sha_K + 0
-
-	/* adjust initial values */
-	mov	r6, r6, ror #30
-	mov	r7, r7, ror #30
-	mov	r8, r8, ror #30
-
-3:	subs	lr, lr, #1
-	sha_f1	r4, r5, r6, r7, r8
-	sha_f1	r8, r4, r5, r6, r7
-	sha_f1	r7, r8, r4, r5, r6
-	sha_f1	r6, r7, r8, r4, r5
-	sha_f1	r5, r6, r7, r8, r4
-	bne	3b
-
-	ldr	r1, .L_sha_K + 4
-	mov	lr, #4
-
-4:	subs	lr, lr, #1
-	sha_f2	r4, r5, r6, r7, r8
-	sha_f2	r8, r4, r5, r6, r7
-	sha_f2	r7, r8, r4, r5, r6
-	sha_f2	r6, r7, r8, r4, r5
-	sha_f2	r5, r6, r7, r8, r4
-	bne	4b
-
-	ldr	r1, .L_sha_K + 8
-	mov	lr, #4
-
-5:	subs	lr, lr, #1
-	sha_f3	r4, r5, r6, r7, r8
-	sha_f3	r8, r4, r5, r6, r7
-	sha_f3	r7, r8, r4, r5, r6
-	sha_f3	r6, r7, r8, r4, r5
-	sha_f3	r5, r6, r7, r8, r4
-	bne	5b
-
-	ldr	r1, .L_sha_K + 12
-	mov	lr, #4
-
-6:	subs	lr, lr, #1
-	sha_f2	r4, r5, r6, r7, r8
-	sha_f2	r8, r4, r5, r6, r7
-	sha_f2	r7, r8, r4, r5, r6
-	sha_f2	r6, r7, r8, r4, r5
-	sha_f2	r5, r6, r7, r8, r4
-	bne	6b
-
-	ldmia	r0, {r1, r2, r3, ip, lr}
-	add	r4, r1, r4
-	add	r5, r2, r5
-	add	r6, r3, r6, ror #2
-	add	r7, ip, r7, ror #2
-	add	r8, lr, r8, ror #2
-	stmia	r0, {r4 - r8}
-
-	ldmfd	sp!, {r4 - r8, pc}
-
-.L_sha_K:
-	.word	0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6
diff --git a/bisect.c b/bisect.c
index 7f20acb4b9..dc18db8af9 100644
--- a/bisect.c
+++ b/bisect.c
@@ -991,7 +991,7 @@ int bisect_next_all(const char *prefix)
 
 	if (!hashcmp(bisect_rev, current_bad_sha1)) {
 		exit_if_skipped_commits(tried, current_bad_sha1);
-		printf("%s is first bad commit\n", bisect_rev_hex);
+		printf("%s is the first bad commit\n", bisect_rev_hex);
 		show_diff_tree(prefix, revs.commits->item);
 		/* This means the bisection process succeeded. */
 		exit(10);
diff --git a/block-sha1/sha1.c b/block-sha1/sha1.c
index 464cb258aa..d8934757a5 100644
--- a/block-sha1/sha1.c
+++ b/block-sha1/sha1.c
@@ -1,15 +1,17 @@
 /*
- * Based on the Mozilla SHA1 (see mozilla-sha1/sha1.c),
- * optimized to do word accesses rather than byte accesses,
+ * SHA1 routine optimized to do word accesses rather than byte accesses,
  * and to avoid unnecessary copies into the context array.
+ *
+ * This was initially based on the Mozilla SHA1 implementation, although
+ * none of the original Mozilla code remains.
  */
 
-#include <string.h>
-#include <arpa/inet.h>
+/* this is only to get definitions for memcpy(), ntohl() and htonl() */
+#include "../git-compat-util.h"
 
 #include "sha1.h"
 
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 
 /*
  * Force usage of rol or ror by selecting the one with the smaller constant.
@@ -54,7 +56,7 @@
 
 #if defined(__i386__) || defined(__x86_64__)
   #define setW(x, val) (*(volatile unsigned int *)&W(x) = (val))
-#elif defined(__arm__)
+#elif defined(__GNUC__) && defined(__arm__)
   #define setW(x, val) do { W(x) = (val); __asm__("":::"memory"); } while (0)
 #else
   #define setW(x, val) (W(x) = (val))
diff --git a/block-sha1/sha1.h b/block-sha1/sha1.h
index c1ae74d3da..b864df623e 100644
--- a/block-sha1/sha1.h
+++ b/block-sha1/sha1.h
@@ -1,13 +1,15 @@
 /*
- * Based on the Mozilla SHA1 (see mozilla-sha1/sha1.h),
- * optimized to do word accesses rather than byte accesses,
+ * SHA1 routine optimized to do word accesses rather than byte accesses,
  * and to avoid unnecessary copies into the context array.
+ *
+ * This was initially based on the Mozilla SHA1 implementation, although
+ * none of the original Mozilla code remains.
  */
 
 typedef struct {
+	unsigned long long size;
 	unsigned int H[5];
 	unsigned int W[16];
-	unsigned long long size;
 } blk_SHA_CTX;
 
 void blk_SHA1_Init(blk_SHA_CTX *ctx);
diff --git a/builtin-apply.c b/builtin-apply.c
index 39dc96ae02..ae11b41ef2 100644
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -61,6 +61,13 @@ static enum ws_error_action {
 static int whitespace_error;
 static int squelch_whitespace_errors = 5;
 static int applied_after_fixing_ws;
+
+static enum ws_ignore {
+	ignore_ws_none,
+	ignore_ws_change,
+} ws_ignore_action = ignore_ws_none;
+
+
 static const char *patch_input_file;
 static const char *root;
 static int root_len;
@@ -97,6 +104,21 @@ static void parse_whitespace_option(const char *option)
 	die("unrecognized whitespace option '%s'", option);
 }
 
+static void parse_ignorewhitespace_option(const char *option)
+{
+	if (!option || !strcmp(option, "no") ||
+	    !strcmp(option, "false") || !strcmp(option, "never") ||
+	    !strcmp(option, "none")) {
+		ws_ignore_action = ignore_ws_none;
+		return;
+	}
+	if (!strcmp(option, "change")) {
+		ws_ignore_action = ignore_ws_change;
+		return;
+	}
+	die("unrecognized whitespace ignore option '%s'", option);
+}
+
 static void set_default_whitespace_mode(const char *whitespace_option)
 {
 	if (!whitespace_option && !apply_default_whitespace)
@@ -214,6 +236,62 @@ static uint32_t hash_line(const char *cp, size_t len)
 	return h;
 }
 
+/*
+ * Compare lines s1 of length n1 and s2 of length n2, ignoring
+ * whitespace difference. Returns 1 if they match, 0 otherwise
+ */
+static int fuzzy_matchlines(const char *s1, size_t n1,
+			    const char *s2, size_t n2)
+{
+	const char *last1 = s1 + n1 - 1;
+	const char *last2 = s2 + n2 - 1;
+	int result = 0;
+
+	if (n1 < 0 || n2 < 0)
+		return 0;
+
+	/* ignore line endings */
+	while ((*last1 == '\r') || (*last1 == '\n'))
+		last1--;
+	while ((*last2 == '\r') || (*last2 == '\n'))
+		last2--;
+
+	/* skip leading whitespace */
+	while (isspace(*s1) && (s1 <= last1))
+		s1++;
+	while (isspace(*s2) && (s2 <= last2))
+		s2++;
+	/* early return if both lines are empty */
+	if ((s1 > last1) && (s2 > last2))
+		return 1;
+	while (!result) {
+		result = *s1++ - *s2++;
+		/*
+		 * Skip whitespace inside. We check for whitespace on
+		 * both buffers because we don't want "a b" to match
+		 * "ab"
+		 */
+		if (isspace(*s1) && isspace(*s2)) {
+			while (isspace(*s1) && s1 <= last1)
+				s1++;
+			while (isspace(*s2) && s2 <= last2)
+				s2++;
+		}
+		/*
+		 * If we reached the end on one side only,
+		 * lines don't match
+		 */
+		if (
+		    ((s2 > last2) && (s1 <= last1)) ||
+		    ((s1 > last1) && (s2 <= last2)))
+			return 0;
+		if ((s1 > last1) && (s2 > last2))
+			break;
+	}
+
+	return !result;
+}
+
 static void add_line_info(struct image *img, const char *bol, size_t len, unsigned flag)
 {
 	ALLOC_GROW(img->line_allocated, img->nr + 1, img->alloc);
@@ -1672,10 +1750,17 @@ static int read_old_data(struct stat *st, const char *path, struct strbuf *buf)
 	}
 }
 
+/*
+ * Update the preimage, and the common lines in postimage,
+ * from buffer buf of length len. If postlen is 0 the postimage
+ * is updated in place, otherwise it's updated on a new buffer
+ * of length postlen
+ */
+
 static void update_pre_post_images(struct image *preimage,
 				   struct image *postimage,
 				   char *buf,
-				   size_t len)
+				   size_t len, size_t postlen)
 {
 	int i, ctx;
 	char *new, *old, *fixed;
@@ -1694,11 +1779,19 @@ static void update_pre_post_images(struct image *preimage,
 	*preimage = fixed_preimage;
 
 	/*
-	 * Adjust the common context lines in postimage, in place.
-	 * This is possible because whitespace fixing does not make
-	 * the string grow.
+	 * Adjust the common context lines in postimage. This can be
+	 * done in-place when we are just doing whitespace fixing,
+	 * which does not make the string grow, but needs a new buffer
+	 * when ignoring whitespace causes the update, since in this case
+	 * we could have e.g. tabs converted to multiple spaces.
+	 * We trust the caller to tell us if the update can be done
+	 * in place (postlen==0) or not.
 	 */
-	new = old = postimage->buf;
+	old = postimage->buf;
+	if (postlen)
+		new = postimage->buf = xmalloc(postlen);
+	else
+		new = old;
 	fixed = preimage->buf;
 	for (i = ctx = 0; i < postimage->nr; i++) {
 		size_t len = postimage->line[i].len;
@@ -1773,12 +1866,58 @@ static int match_fragment(struct image *img,
 	    !memcmp(img->buf + try, preimage->buf, preimage->len))
 		return 1;
 
+	/*
+	 * No exact match. If we are ignoring whitespace, run a line-by-line
+	 * fuzzy matching. We collect all the line length information because
+	 * we need it to adjust whitespace if we match.
+	 */
+	if (ws_ignore_action == ignore_ws_change) {
+		size_t imgoff = 0;
+		size_t preoff = 0;
+		size_t postlen = postimage->len;
+		size_t imglen[preimage->nr];
+		for (i = 0; i < preimage->nr; i++) {
+			size_t prelen = preimage->line[i].len;
+
+			imglen[i] = img->line[try_lno+i].len;
+			if (!fuzzy_matchlines(
+				img->buf + try + imgoff, imglen[i],
+				preimage->buf + preoff, prelen))
+				return 0;
+			if (preimage->line[i].flag & LINE_COMMON)
+				postlen += imglen[i] - prelen;
+			imgoff += imglen[i];
+			preoff += prelen;
+		}
+
+		/*
+		 * Ok, the preimage matches with whitespace fuzz. Update it and
+		 * the common postimage lines to use the same whitespace as the
+		 * target. imgoff now holds the true length of the target that
+		 * matches the preimage, and we need to update the line lengths
+		 * of the preimage to match the target ones.
+		 */
+		fixed_buf = xmalloc(imgoff);
+		memcpy(fixed_buf, img->buf + try, imgoff);
+		for (i = 0; i < preimage->nr; i++)
+			preimage->line[i].len = imglen[i];
+
+		/*
+		 * Update the preimage buffer and the postimage context lines.
+		 */
+		update_pre_post_images(preimage, postimage,
+				fixed_buf, imgoff, postlen);
+		return 1;
+	}
+
 	if (ws_error_action != correct_ws_error)
 		return 0;
 
 	/*
 	 * The hunk does not apply byte-by-byte, but the hash says
-	 * it might with whitespace fuzz.
+	 * it might with whitespace fuzz. We haven't been asked to
+	 * ignore whitespace, we were asked to correct whitespace
+	 * errors, so let's try matching after whitespace correction.
 	 */
 	fixed_buf = xmalloc(preimage->len + 1);
 	buf = fixed_buf;
@@ -1830,7 +1969,7 @@ static int match_fragment(struct image *img,
 	 * hunk match.  Update the context lines in the postimage.
 	 */
 	update_pre_post_images(preimage, postimage,
-			       fixed_buf, buf - fixed_buf);
+			       fixed_buf, buf - fixed_buf, 0);
 	return 1;
 
  unmatch_exit:
@@ -3272,6 +3411,8 @@ static int git_apply_config(const char *var, const char *value, void *cb)
 {
 	if (!strcmp(var, "apply.whitespace"))
 		return git_config_string(&apply_default_whitespace, var, value);
+	else if (!strcmp(var, "apply.ignorewhitespace"))
+		return git_config_string(&apply_default_ignorewhitespace, var, value);
 	return git_default_config(var, value, cb);
 }
 
@@ -3308,6 +3449,16 @@ static int option_parse_z(const struct option *opt,
 	return 0;
 }
 
+static int option_parse_space_change(const struct option *opt,
+			  const char *arg, int unset)
+{
+	if (unset)
+		ws_ignore_action = ignore_ws_none;
+	else
+		ws_ignore_action = ignore_ws_change;
+	return 0;
+}
+
 static int option_parse_whitespace(const struct option *opt,
 				   const char *arg, int unset)
 {
@@ -3384,6 +3535,12 @@ int cmd_apply(int argc, const char **argv, const char *unused_prefix)
 		{ OPTION_CALLBACK, 0, "whitespace", &whitespace_option, "action",
 			"detect new or modified lines that have whitespace errors",
 			0, option_parse_whitespace },
+		{ OPTION_CALLBACK, 0, "ignore-space-change", NULL, NULL,
+			"ignore changes in whitespace when finding context",
+			PARSE_OPT_NOARG, option_parse_space_change },
+		{ OPTION_CALLBACK, 0, "ignore-whitespace", NULL, NULL,
+			"ignore changes in whitespace when finding context",
+			PARSE_OPT_NOARG, option_parse_space_change },
 		OPT_BOOLEAN('R', "reverse", &apply_in_reverse,
 			"apply the patch in reverse"),
 		OPT_BOOLEAN(0, "unidiff-zero", &unidiff_zero,
@@ -3408,6 +3565,8 @@ int cmd_apply(int argc, const char **argv, const char *unused_prefix)
 	git_config(git_apply_config, NULL);
 	if (apply_default_whitespace)
 		parse_whitespace_option(apply_default_whitespace);
+	if (apply_default_ignorewhitespace)
+		parse_ignorewhitespace_option(apply_default_ignorewhitespace);
 
 	argc = parse_options(argc, argv, prefix, builtin_apply_options,
 			apply_usage, 0);
diff --git a/builtin-checkout.c b/builtin-checkout.c
index 8a9a474218..c6d6ac99f6 100644
--- a/builtin-checkout.c
+++ b/builtin-checkout.c
@@ -402,7 +402,9 @@ static int merge_working_tree(struct checkout_opts *opts,
 		topts.dir = xcalloc(1, sizeof(*topts.dir));
 		topts.dir->flags |= DIR_SHOW_IGNORED;
 		topts.dir->exclude_per_dir = ".gitignore";
-		tree = parse_tree_indirect(old->commit->object.sha1);
+		tree = parse_tree_indirect(old->commit ?
+					   old->commit->object.sha1 :
+					   (unsigned char *)EMPTY_TREE_SHA1_BIN);
 		init_tree_desc(&trees[0], tree->buffer, tree->size);
 		tree = parse_tree_indirect(new->commit->object.sha1);
 		init_tree_desc(&trees[1], tree->buffer, tree->size);
@@ -541,14 +543,6 @@ static int switch_branches(struct checkout_opts *opts, struct branch_info *new)
 		parse_commit(new->commit);
 	}
 
-	if (!old.commit && !opts->force) {
-		if (!opts->quiet) {
-			warning("You appear to be on a branch yet to be born.");
-			warning("Forcing checkout of %s.", new->name);
-		}
-		opts->force = 1;
-	}
-
 	ret = merge_working_tree(opts, &old, new);
 	if (ret)
 		return ret;
diff --git a/builtin-clone.c b/builtin-clone.c
index 32dea74d78..0d2b4a8200 100644
--- a/builtin-clone.c
+++ b/builtin-clone.c
@@ -38,7 +38,7 @@ static const char * const builtin_clone_usage[] = {
 };
 
 static int option_quiet, option_no_checkout, option_bare, option_mirror;
-static int option_local, option_no_hardlinks, option_shared;
+static int option_local, option_no_hardlinks, option_shared, option_recursive;
 static char *option_template, *option_reference, *option_depth;
 static char *option_origin = NULL;
 static char *option_upload_pack = "git-upload-pack";
@@ -59,6 +59,8 @@ static struct option builtin_clone_options[] = {
 		    "don't use local hardlinks, always copy"),
 	OPT_BOOLEAN('s', "shared", &option_shared,
 		    "setup as shared repository"),
+	OPT_BOOLEAN(0, "recursive", &option_recursive,
+		    "setup as shared repository"),
 	OPT_STRING(0, "template", &option_template, "path",
 		   "path the template repository"),
 	OPT_STRING(0, "reference", &option_reference, "repo",
@@ -73,6 +75,10 @@ static struct option builtin_clone_options[] = {
 	OPT_END()
 };
 
+static const char *argv_submodule[] = {
+	"submodule", "update", "--init", "--recursive", NULL
+};
+
 static char *get_repo_path(const char *repo, int *is_bundle)
 {
 	static char *suffix[] = { "/.git", ".git", "" };
@@ -608,6 +614,9 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 		err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
 				sha1_to_hex(remote_head->old_sha1), "1", NULL);
+
+		if (!err && option_recursive)
+			err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
 	}
 
 	strbuf_release(&reflog_msg);
diff --git a/builtin-commit.c b/builtin-commit.c
index 4bcce06fbf..200ffdaad4 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -51,7 +51,7 @@ static const char *template_file;
 static char *edit_message, *use_message;
 static char *author_name, *author_email, *author_date;
 static int all, edit_flag, also, interactive, only, amend, signoff;
-static int quiet, verbose, no_verify, allow_empty;
+static int quiet, verbose, no_verify, allow_empty, dry_run;
 static char *untracked_files_arg;
 /*
  * The default commit message cleanup mode will remove the lines
@@ -103,6 +103,7 @@ static struct option builtin_commit_options[] = {
 	OPT_BOOLEAN(0, "interactive", &interactive, "interactively add files"),
 	OPT_BOOLEAN('o', "only", &only, "commit only specified files"),
 	OPT_BOOLEAN('n', "no-verify", &no_verify, "bypass pre-commit hook"),
+	OPT_BOOLEAN(0, "dry-run", &dry_run, "show what would be committed"),
 	OPT_BOOLEAN(0, "amend", &amend, "amend previous commit"),
 	{ OPTION_STRING, 'u', "untracked-files", &untracked_files_arg, "mode", "show untracked files, optional modes: all, normal, no. (Default: all)", PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
 	OPT_BOOLEAN(0, "allow-empty", &allow_empty, "ok to record an empty change"),
@@ -217,12 +218,15 @@ static void create_base_index(void)
 		exit(128); /* We've already reported the error, finish dying */
 }
 
-static char *prepare_index(int argc, const char **argv, const char *prefix)
+static char *prepare_index(int argc, const char **argv, const char *prefix, int is_status)
 {
 	int fd;
 	struct string_list partial;
 	const char **pathspec = NULL;
+	int refresh_flags = REFRESH_QUIET;
 
+	if (is_status)
+		refresh_flags |= REFRESH_UNMERGED;
 	if (interactive) {
 		if (interactive_add(argc, argv, prefix) != 0)
 			die("interactive add failed");
@@ -253,7 +257,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
 	if (all || (also && pathspec && *pathspec)) {
 		int fd = hold_locked_index(&index_lock, 1);
 		add_files_to_cache(also ? prefix : NULL, pathspec, 0);
-		refresh_cache(REFRESH_QUIET);
+		refresh_cache(refresh_flags);
 		if (write_cache(fd, active_cache, active_nr) ||
 		    close_lock_file(&index_lock))
 			die("unable to write new_index file");
@@ -272,7 +276,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
 	 */
 	if (!pathspec || !*pathspec) {
 		fd = hold_locked_index(&index_lock, 1);
-		refresh_cache(REFRESH_QUIET);
+		refresh_cache(refresh_flags);
 		if (write_cache(fd, active_cache, active_nr) ||
 		    commit_locked_index(&index_lock))
 			die("unable to write new_index file");
@@ -339,27 +343,24 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
 	return false_lock.filename;
 }
 
-static int run_status(FILE *fp, const char *index_file, const char *prefix, int nowarn)
+static int run_status(FILE *fp, const char *index_file, const char *prefix, int nowarn,
+		      struct wt_status *s)
 {
-	struct wt_status s;
-
-	wt_status_prepare(&s);
-	if (wt_status_relative_paths)
-		s.prefix = prefix;
+	if (s->relative_paths)
+		s->prefix = prefix;
 
 	if (amend) {
-		s.amend = 1;
-		s.reference = "HEAD^1";
+		s->amend = 1;
+		s->reference = "HEAD^1";
 	}
-	s.verbose = verbose;
-	s.untracked = (show_untracked_files == SHOW_ALL_UNTRACKED_FILES);
-	s.index_file = index_file;
-	s.fp = fp;
-	s.nowarn = nowarn;
+	s->verbose = verbose;
+	s->index_file = index_file;
+	s->fp = fp;
+	s->nowarn = nowarn;
 
-	wt_status_print(&s);
+	wt_status_print(s);
 
-	return s.commitable;
+	return s->commitable;
 }
 
 static int is_a_merge(const unsigned char *sha1)
@@ -413,7 +414,8 @@ static void determine_author_info(void)
 	author_date = date;
 }
 
-static int prepare_to_commit(const char *index_file, const char *prefix)
+static int prepare_to_commit(const char *index_file, const char *prefix,
+			     struct wt_status *s)
 {
 	struct stat statbuf;
 	int commitable, saved_color_setting;
@@ -555,10 +557,10 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
 		if (ident_shown)
 			fprintf(fp, "#\n");
 
-		saved_color_setting = wt_status_use_color;
-		wt_status_use_color = 0;
-		commitable = run_status(fp, index_file, prefix, 1);
-		wt_status_use_color = saved_color_setting;
+		saved_color_setting = s->use_color;
+		s->use_color = 0;
+		commitable = run_status(fp, index_file, prefix, 1, s);
+		s->use_color = saved_color_setting;
 	} else {
 		unsigned char sha1[20];
 		const char *parent = "HEAD";
@@ -579,7 +581,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
 
 	if (!commitable && !in_merge && !allow_empty &&
 	    !(amend && is_a_merge(head_sha1))) {
-		run_status(stdout, index_file, prefix, 0);
+		run_status(stdout, index_file, prefix, 0, s);
 		return 0;
 	}
 
@@ -691,7 +693,8 @@ static const char *find_author_by_nickname(const char *name)
 
 static int parse_and_validate_options(int argc, const char *argv[],
 				      const char * const usage[],
-				      const char *prefix)
+				      const char *prefix,
+				      struct wt_status *s)
 {
 	int f = 0;
 
@@ -794,11 +797,11 @@ static int parse_and_validate_options(int argc, const char *argv[],
 	if (!untracked_files_arg)
 		; /* default already initialized */
 	else if (!strcmp(untracked_files_arg, "no"))
-		show_untracked_files = SHOW_NO_UNTRACKED_FILES;
+		s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
 	else if (!strcmp(untracked_files_arg, "normal"))
-		show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
+		s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
 	else if (!strcmp(untracked_files_arg, "all"))
-		show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
+		s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
 	else
 		die("Invalid untracked files mode '%s'", untracked_files_arg);
 
@@ -810,28 +813,93 @@ static int parse_and_validate_options(int argc, const char *argv[],
 	return argc;
 }
 
-int cmd_status(int argc, const char **argv, const char *prefix)
+static int dry_run_commit(int argc, const char **argv, const char *prefix,
+			  struct wt_status *s)
 {
-	const char *index_file;
 	int commitable;
+	const char *index_file;
 
-	git_config(git_status_config, NULL);
+	index_file = prepare_index(argc, argv, prefix, 1);
+	commitable = run_status(stdout, index_file, prefix, 0, s);
+	rollback_index_files();
 
-	if (wt_status_use_color == -1)
-		wt_status_use_color = git_use_color_default;
+	return commitable ? 0 : 1;
+}
 
-	if (diff_use_color_default == -1)
-		diff_use_color_default = git_use_color_default;
+static int parse_status_slot(const char *var, int offset)
+{
+	if (!strcasecmp(var+offset, "header"))
+		return WT_STATUS_HEADER;
+	if (!strcasecmp(var+offset, "updated")
+		|| !strcasecmp(var+offset, "added"))
+		return WT_STATUS_UPDATED;
+	if (!strcasecmp(var+offset, "changed"))
+		return WT_STATUS_CHANGED;
+	if (!strcasecmp(var+offset, "untracked"))
+		return WT_STATUS_UNTRACKED;
+	if (!strcasecmp(var+offset, "nobranch"))
+		return WT_STATUS_NOBRANCH;
+	if (!strcasecmp(var+offset, "unmerged"))
+		return WT_STATUS_UNMERGED;
+	die("bad config variable '%s'", var);
+}
 
-	argc = parse_and_validate_options(argc, argv, builtin_status_usage, prefix);
+static int git_status_config(const char *k, const char *v, void *cb)
+{
+	struct wt_status *s = cb;
 
-	index_file = prepare_index(argc, argv, prefix);
+	if (!strcmp(k, "status.submodulesummary")) {
+		int is_bool;
+		s->submodule_summary = git_config_bool_or_int(k, v, &is_bool);
+		if (is_bool && s->submodule_summary)
+			s->submodule_summary = -1;
+		return 0;
+	}
+	if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
+		s->use_color = git_config_colorbool(k, v, -1);
+		return 0;
+	}
+	if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) {
+		int slot = parse_status_slot(k, 13);
+		if (!v)
+			return config_error_nonbool(k);
+		color_parse(v, k, s->color_palette[slot]);
+		return 0;
+	}
+	if (!strcmp(k, "status.relativepaths")) {
+		s->relative_paths = git_config_bool(k, v);
+		return 0;
+	}
+	if (!strcmp(k, "status.showuntrackedfiles")) {
+		if (!v)
+			return config_error_nonbool(k);
+		else if (!strcmp(v, "no"))
+			s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
+		else if (!strcmp(v, "normal"))
+			s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
+		else if (!strcmp(v, "all"))
+			s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
+		else
+			return error("Invalid untracked files mode '%s'", v);
+		return 0;
+	}
+	return git_diff_ui_config(k, v, NULL);
+}
 
-	commitable = run_status(stdout, index_file, prefix, 0);
+int cmd_status(int argc, const char **argv, const char *prefix)
+{
+	struct wt_status s;
 
-	rollback_index_files();
+	wt_status_prepare(&s);
+	git_config(git_status_config, &s);
+	if (s.use_color == -1)
+		s.use_color = git_use_color_default;
+	if (diff_use_color_default == -1)
+		diff_use_color_default = git_use_color_default;
 
-	return commitable ? 0 : 1;
+	argc = parse_and_validate_options(argc, argv, builtin_status_usage,
+					  prefix, &s);
+	return dry_run_commit(argc, argv, prefix, &s);
 }
 
 static void print_summary(const char *prefix, const unsigned char *sha1)
@@ -883,10 +951,12 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
 
 static int git_commit_config(const char *k, const char *v, void *cb)
 {
+	struct wt_status *s = cb;
+
 	if (!strcmp(k, "commit.template"))
 		return git_config_string(&template_file, k, v);
 
-	return git_status_config(k, v, cb);
+	return git_status_config(k, v, s);
 }
 
 int cmd_commit(int argc, const char **argv, const char *prefix)
@@ -899,19 +969,26 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 	struct commit_list *parents = NULL, **pptr = &parents;
 	struct stat statbuf;
 	int allow_fast_forward = 1;
+	struct wt_status s;
 
-	git_config(git_commit_config, NULL);
-
-	if (wt_status_use_color == -1)
-		wt_status_use_color = git_use_color_default;
+	wt_status_prepare(&s);
+	git_config(git_commit_config, &s);
 
-	argc = parse_and_validate_options(argc, argv, builtin_commit_usage, prefix);
+	if (s.use_color == -1)
+		s.use_color = git_use_color_default;
 
-	index_file = prepare_index(argc, argv, prefix);
+	argc = parse_and_validate_options(argc, argv, builtin_commit_usage,
+					  prefix, &s);
+	if (dry_run) {
+		if (diff_use_color_default == -1)
+			diff_use_color_default = git_use_color_default;
+		return dry_run_commit(argc, argv, prefix, &s);
+	}
+	index_file = prepare_index(argc, argv, prefix, 0);
 
 	/* Set up everything for writing the commit object.  This includes
 	   running hooks, writing the trees, and interacting with the user.  */
-	if (!prepare_to_commit(index_file, prefix)) {
+	if (!prepare_to_commit(index_file, prefix, &s)) {
 		rollback_index_files();
 		return 1;
 	}
diff --git a/builtin-fsck.c b/builtin-fsck.c
index b3d38fa277..c58b0e337e 100644
--- a/builtin-fsck.c
+++ b/builtin-fsck.c
@@ -589,6 +589,7 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
 	struct alternate_object_database *alt;
 
 	errors_found = 0;
+	read_replace_refs = 0;
 
 	argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
 	if (write_lost_and_found) {
diff --git a/builtin-log.c b/builtin-log.c
index 82236c531b..25e21ed415 100644
--- a/builtin-log.c
+++ b/builtin-log.c
@@ -35,6 +35,7 @@ static void cmd_log_init(int argc, const char **argv, const char *prefix,
 		      struct rev_info *rev)
 {
 	int i;
+	int decoration_style = 0;
 
 	rev->abbrev = DEFAULT_ABBREV;
 	rev->commit_format = CMIT_FMT_DEFAULT;
@@ -61,8 +62,15 @@ static void cmd_log_init(int argc, const char **argv, const char *prefix,
 	for (i = 1; i < argc; i++) {
 		const char *arg = argv[i];
 		if (!strcmp(arg, "--decorate")) {
-			load_ref_decorations();
-			rev->show_decorations = 1;
+			decoration_style = DECORATE_SHORT_REFS;
+		} else if (!prefixcmp(arg, "--decorate=")) {
+			const char *v = skip_prefix(arg, "--decorate=");
+			if (!strcmp(v, "full"))
+				decoration_style = DECORATE_FULL_REFS;
+			else if (!strcmp(v, "short"))
+				decoration_style = DECORATE_SHORT_REFS;
+			else
+				die("invalid --decorate option: %s", arg);
 		} else if (!strcmp(arg, "--source")) {
 			rev->show_source = 1;
 		} else if (!strcmp(arg, "-h")) {
@@ -70,6 +78,10 @@ static void cmd_log_init(int argc, const char **argv, const char *prefix,
 		} else
 			die("unrecognized argument: %s", arg);
 	}
+	if (decoration_style) {
+		rev->show_decorations = 1;
+		load_ref_decorations(decoration_style);
+	}
 }
 
 /*
diff --git a/builtin-mailinfo.c b/builtin-mailinfo.c
index 92637ac0ba..b0b5d8f6cb 100644
--- a/builtin-mailinfo.c
+++ b/builtin-mailinfo.c
@@ -765,7 +765,6 @@ static void handle_filter(struct strbuf *line)
 
 static void handle_body(void)
 {
-	int len = 0;
 	struct strbuf prev = STRBUF_INIT;
 
 	/* Skip up to the first boundary */
@@ -775,8 +774,6 @@ static void handle_body(void)
 	}
 
 	do {
-		strbuf_setlen(&line, line.len + len);
-
 		/* process any boundary lines */
 		if (*content_top && is_multipart_boundary(&line)) {
 			/* flush any leftover */
@@ -832,10 +829,7 @@ static void handle_body(void)
 			handle_filter(&line);
 		}
 
-		strbuf_reset(&line);
-		if (strbuf_avail(&line) < 100)
-			strbuf_grow(&line, 100);
-	} while ((len = read_line_with_nul(line.buf, strbuf_avail(&line), fin)));
+	} while (!strbuf_getwholeline(&line, fin, '\n'));
 
 handle_body_out:
 	strbuf_release(&prev);
diff --git a/builtin-mailsplit.c b/builtin-mailsplit.c
index ad5f6b593d..ee6ca0ebcd 100644
--- a/builtin-mailsplit.c
+++ b/builtin-mailsplit.c
@@ -7,6 +7,7 @@
 #include "cache.h"
 #include "builtin.h"
 #include "string-list.h"
+#include "strbuf.h"
 
 static const char git_mailsplit_usage[] =
 "git mailsplit [-d<prec>] [-f<n>] [-b] -o<directory> [<mbox>|<Maildir>...]";
@@ -42,26 +43,8 @@ static int is_from_line(const char *line, int len)
 	return 1;
 }
 
-/* Could be as small as 64, enough to hold a Unix "From " line. */
-static char buf[4096];
-
-/* We cannot use fgets() because our lines can contain NULs */
-int read_line_with_nul(char *buf, int size, FILE *in)
-{
-	int len = 0, c;
-
-	for (;;) {
-		c = getc(in);
-		if (c == EOF)
-			break;
-		buf[len++] = c;
-		if (c == '\n' || len + 1 >= size)
-			break;
-	}
-	buf[len] = '\0';
-
-	return len;
-}
+static struct strbuf buf = STRBUF_INIT;
+static int keep_cr;
 
 /* Called with the first line (potentially partial)
  * already in buf[] -- normally that should begin with
@@ -71,10 +54,9 @@ int read_line_with_nul(char *buf, int size, FILE *in)
 static int split_one(FILE *mbox, const char *name, int allow_bare)
 {
 	FILE *output = NULL;
-	int len = strlen(buf);
 	int fd;
 	int status = 0;
-	int is_bare = !is_from_line(buf, len);
+	int is_bare = !is_from_line(buf.buf, buf.len);
 
 	if (is_bare && !allow_bare)
 		goto corrupt;
@@ -88,20 +70,23 @@ static int split_one(FILE *mbox, const char *name, int allow_bare)
 	 * "From " and having something that looks like a date format.
 	 */
 	for (;;) {
-		int is_partial = len && buf[len-1] != '\n';
+		if (!keep_cr && buf.len > 1 && buf.buf[buf.len-1] == '\n' &&
+			buf.buf[buf.len-2] == '\r') {
+			strbuf_setlen(&buf, buf.len-2);
+			strbuf_addch(&buf, '\n');
+		}
 
-		if (fwrite(buf, 1, len, output) != len)
+		if (fwrite(buf.buf, 1, buf.len, output) != buf.len)
 			die_errno("cannot write output");
 
-		len = read_line_with_nul(buf, sizeof(buf), mbox);
-		if (len == 0) {
+		if (strbuf_getwholeline(&buf, mbox, '\n')) {
 			if (feof(mbox)) {
 				status = 1;
 				break;
 			}
 			die_errno("cannot read mbox");
 		}
-		if (!is_partial && !is_bare && is_from_line(buf, len))
+		if (!is_bare && is_from_line(buf.buf, buf.len))
 			break; /* done with one message */
 	}
 	fclose(output);
@@ -166,7 +151,7 @@ static int split_maildir(const char *maildir, const char *dir,
 			goto out;
 		}
 
-		if (fgets(buf, sizeof(buf), f) == NULL) {
+		if (strbuf_getwholeline(&buf, f, '\n')) {
 			error("cannot read mail %s (%s)", file, strerror(errno));
 			goto out;
 		}
@@ -203,7 +188,7 @@ static int split_mbox(const char *file, const char *dir, int allow_bare,
 	} while (isspace(peek));
 	ungetc(peek, f);
 
-	if (fgets(buf, sizeof(buf), f) == NULL) {
+	if (strbuf_getwholeline(&buf, f, '\n')) {
 		/* empty stdin is OK */
 		if (f != stdin) {
 			error("cannot read mbox %s", file);
@@ -248,6 +233,8 @@ int cmd_mailsplit(int argc, const char **argv, const char *prefix)
 			nr = strtol(arg+2, NULL, 10);
 		} else if ( arg[1] == 'b' && !arg[2] ) {
 			allow_bare = 1;
+		} else if (!strcmp(arg, "--keep-cr")) {
+			keep_cr = 1;
 		} else if ( arg[1] == 'o' && arg[2] ) {
 			dir = arg+2;
 		} else if ( arg[1] == '-' && !arg[2] ) {
diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 9cc8a8451d..c4337480fd 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -2098,6 +2098,8 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 	int rp_ac_alloc = 64;
 	int rp_ac;
 
+	read_replace_refs = 0;
+
 	rp_av = xcalloc(rp_ac_alloc, sizeof(*rp_av));
 
 	rp_av[0] = "pack-objects";
diff --git a/builtin-prune.c b/builtin-prune.c
index 0ed9cce4a2..8459aec8e8 100644
--- a/builtin-prune.c
+++ b/builtin-prune.c
@@ -140,6 +140,7 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
 	char *s;
 
 	save_commit_buffer = 0;
+	read_replace_refs = 0;
 	init_revisions(&revs, prefix);
 
 	argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
diff --git a/builtin-read-tree.c b/builtin-read-tree.c
index 9c2d634d6d..14c836b169 100644
--- a/builtin-read-tree.c
+++ b/builtin-read-tree.c
@@ -113,13 +113,15 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
 	argc = parse_options(argc, argv, unused_prefix, read_tree_options,
 			     read_tree_usage, 0);
 
-	if (read_cache_unmerged() && (opts.prefix || opts.merge))
-		die("You need to resolve your current index first");
-
 	prefix_set = opts.prefix ? 1 : 0;
 	if (1 < opts.merge + opts.reset + prefix_set)
 		die("Which one? -m, --reset, or --prefix?");
-	stage = opts.merge = (opts.reset || opts.merge || prefix_set);
+
+	if (opts.reset || opts.merge || opts.prefix) {
+		if (read_cache_unmerged() && (opts.prefix || opts.merge))
+			die("You need to resolve your current index first");
+		stage = opts.merge = 1;
+	}
 
 	for (i = 0; i < argc; i++) {
 		const char *arg = argv[i];
diff --git a/builtin-replace.c b/builtin-replace.c
new file mode 100644
index 0000000000..fe3a647a36
--- /dev/null
+++ b/builtin-replace.c
@@ -0,0 +1,159 @@
+/*
+ * Builtin "git replace"
+ *
+ * Copyright (c) 2008 Christian Couder <chriscool@tuxfamily.org>
+ *
+ * Based on builtin-tag.c by Kristian Høgsberg <krh@redhat.com>
+ * and Carlos Rica <jasampler@gmail.com> that was itself based on
+ * git-tag.sh and mktag.c by Linus Torvalds.
+ */
+
+#include "cache.h"
+#include "builtin.h"
+#include "refs.h"
+#include "parse-options.h"
+
+static const char * const git_replace_usage[] = {
+	"git replace [-f] <object> <replacement>",
+	"git replace -d <object>...",
+	"git replace -l [<pattern>]",
+	NULL
+};
+
+static int show_reference(const char *refname, const unsigned char *sha1,
+			  int flag, void *cb_data)
+{
+	const char *pattern = cb_data;
+
+	if (!fnmatch(pattern, refname, 0))
+		printf("%s\n", refname);
+
+	return 0;
+}
+
+static int list_replace_refs(const char *pattern)
+{
+	if (pattern == NULL)
+		pattern = "*";
+
+	for_each_replace_ref(show_reference, (void *) pattern);
+
+	return 0;
+}
+
+typedef int (*each_replace_name_fn)(const char *name, const char *ref,
+				    const unsigned char *sha1);
+
+static int for_each_replace_name(const char **argv, each_replace_name_fn fn)
+{
+	const char **p;
+	char ref[PATH_MAX];
+	int had_error = 0;
+	unsigned char sha1[20];
+
+	for (p = argv; *p; p++) {
+		if (snprintf(ref, sizeof(ref), "refs/replace/%s", *p)
+					>= sizeof(ref)) {
+			error("replace ref name too long: %.*s...", 50, *p);
+			had_error = 1;
+			continue;
+		}
+		if (!resolve_ref(ref, sha1, 1, NULL)) {
+			error("replace ref '%s' not found.", *p);
+			had_error = 1;
+			continue;
+		}
+		if (fn(*p, ref, sha1))
+			had_error = 1;
+	}
+	return had_error;
+}
+
+static int delete_replace_ref(const char *name, const char *ref,
+			      const unsigned char *sha1)
+{
+	if (delete_ref(ref, sha1, 0))
+		return 1;
+	printf("Deleted replace ref '%s'\n", name);
+	return 0;
+}
+
+static int replace_object(const char *object_ref, const char *replace_ref,
+			  int force)
+{
+	unsigned char object[20], prev[20], repl[20];
+	char ref[PATH_MAX];
+	struct ref_lock *lock;
+
+	if (get_sha1(object_ref, object))
+		die("Failed to resolve '%s' as a valid ref.", object_ref);
+	if (get_sha1(replace_ref, repl))
+		die("Failed to resolve '%s' as a valid ref.", replace_ref);
+
+	if (snprintf(ref, sizeof(ref),
+		     "refs/replace/%s",
+		     sha1_to_hex(object)) > sizeof(ref) - 1)
+		die("replace ref name too long: %.*s...", 50, ref);
+	if (check_ref_format(ref))
+		die("'%s' is not a valid ref name.", ref);
+
+	if (!resolve_ref(ref, prev, 1, NULL))
+		hashclr(prev);
+	else if (!force)
+		die("replace ref '%s' already exists", ref);
+
+	lock = lock_any_ref_for_update(ref, prev, 0);
+	if (!lock)
+		die("%s: cannot lock the ref", ref);
+	if (write_ref_sha1(lock, repl, NULL) < 0)
+		die("%s: cannot update the ref", ref);
+
+	return 0;
+}
+
+int cmd_replace(int argc, const char **argv, const char *prefix)
+{
+	int list = 0, delete = 0, force = 0;
+	struct option options[] = {
+		OPT_BOOLEAN('l', NULL, &list, "list replace refs"),
+		OPT_BOOLEAN('d', NULL, &delete, "delete replace refs"),
+		OPT_BOOLEAN('f', NULL, &force, "replace the ref if it exists"),
+		OPT_END()
+	};
+
+	argc = parse_options(argc, argv, prefix, options, git_replace_usage, 0);
+
+	if (list && delete)
+		usage_msg_opt("-l and -d cannot be used together",
+			      git_replace_usage, options);
+
+	if (force && (list || delete))
+		usage_msg_opt("-f cannot be used with -d or -l",
+			      git_replace_usage, options);
+
+	/* Delete refs */
+	if (delete) {
+		if (argc < 1)
+			usage_msg_opt("-d needs at least one argument",
+				      git_replace_usage, options);
+		return for_each_replace_name(argv, delete_replace_ref);
+	}
+
+	/* Replace object */
+	if (!list && argc) {
+		if (argc != 2)
+			usage_msg_opt("bad number of arguments",
+				      git_replace_usage, options);
+		return replace_object(argv[0], argv[1], force);
+	}
+
+	/* List refs, even if "list" is not set */
+	if (argc > 1)
+		usage_msg_opt("only one pattern can be given with -l",
+			      git_replace_usage, options);
+	if (force)
+		usage_msg_opt("-f needs some arguments",
+			      git_replace_usage, options);
+
+	return list_replace_refs(argv[0]);
+}
diff --git a/builtin-unpack-objects.c b/builtin-unpack-objects.c
index 557148a693..685566e0b5 100644
--- a/builtin-unpack-objects.c
+++ b/builtin-unpack-objects.c
@@ -181,10 +181,10 @@ static void write_cached_object(struct object *obj)
 static int check_object(struct object *obj, int type, void *data)
 {
 	if (!obj)
-		return 0;
+		return 1;
 
 	if (obj->flags & FLAG_WRITTEN)
-		return 1;
+		return 0;
 
 	if (type != OBJ_ANY && obj->type != type)
 		die("object type mismatch");
@@ -195,22 +195,24 @@ static int check_object(struct object *obj, int type, void *data)
 		if (type != obj->type || type <= 0)
 			die("object of unexpected type");
 		obj->flags |= FLAG_WRITTEN;
-		return 1;
+		return 0;
 	}
 
 	if (fsck_object(obj, 1, fsck_error_function))
 		die("Error in object");
-	if (!fsck_walk(obj, check_object, NULL))
+	if (fsck_walk(obj, check_object, NULL))
 		die("Error on reachable objects of %s", sha1_to_hex(obj->sha1));
 	write_cached_object(obj);
-	return 1;
+	return 0;
 }
 
 static void write_rest(void)
 {
 	unsigned i;
-	for (i = 0; i < nr_objects; i++)
-		check_object(obj_list[i].obj, OBJ_ANY, NULL);
+	for (i = 0; i < nr_objects; i++) {
+		if (obj_list[i].obj)
+			check_object(obj_list[i].obj, OBJ_ANY, NULL);
+	}
 }
 
 static void added_object(unsigned nr, enum object_type type,
@@ -495,6 +497,8 @@ int cmd_unpack_objects(int argc, const char **argv, const char *prefix)
 	int i;
 	unsigned char sha1[20];
 
+	read_replace_refs = 0;
+
 	git_config(git_default_config, NULL);
 
 	quiet = !isatty(2);
diff --git a/builtin-verify-pack.c b/builtin-verify-pack.c
index b5bd28e959..b6079ae6cb 100644
--- a/builtin-verify-pack.c
+++ b/builtin-verify-pack.c
@@ -6,10 +6,14 @@
 
 #define MAX_CHAIN 50
 
-static void show_pack_info(struct packed_git *p)
+#define VERIFY_PACK_VERBOSE 01
+#define VERIFY_PACK_STAT_ONLY 02
+
+static void show_pack_info(struct packed_git *p, unsigned int flags)
 {
 	uint32_t nr_objects, i;
 	int cnt;
+	int stat_only = flags & VERIFY_PACK_STAT_ONLY;
 	unsigned long chain_histogram[MAX_CHAIN+1], baseobjects;
 
 	nr_objects = p->num_objects;
@@ -32,16 +36,19 @@ static void show_pack_info(struct packed_git *p)
 		type = packed_object_info_detail(p, offset, &size, &store_size,
 						 &delta_chain_length,
 						 base_sha1);
-		printf("%s ", sha1_to_hex(sha1));
+		if (!stat_only)
+			printf("%s ", sha1_to_hex(sha1));
 		if (!delta_chain_length) {
-			printf("%-6s %lu %lu %"PRIuMAX"\n",
-			       type, size, store_size, (uintmax_t)offset);
+			if (!stat_only)
+				printf("%-6s %lu %lu %"PRIuMAX"\n",
+				       type, size, store_size, (uintmax_t)offset);
 			baseobjects++;
 		}
 		else {
-			printf("%-6s %lu %lu %"PRIuMAX" %u %s\n",
-			       type, size, store_size, (uintmax_t)offset,
-			       delta_chain_length, sha1_to_hex(base_sha1));
+			if (!stat_only)
+				printf("%-6s %lu %lu %"PRIuMAX" %u %s\n",
+				       type, size, store_size, (uintmax_t)offset,
+				       delta_chain_length, sha1_to_hex(base_sha1));
 			if (delta_chain_length <= MAX_CHAIN)
 				chain_histogram[delta_chain_length]++;
 			else
@@ -66,10 +73,12 @@ static void show_pack_info(struct packed_git *p)
 		       chain_histogram[0] > 1 ? "s" : "");
 }
 
-static int verify_one_pack(const char *path, int verbose)
+static int verify_one_pack(const char *path, unsigned int flags)
 {
 	char arg[PATH_MAX];
 	int len;
+	int verbose = flags & VERIFY_PACK_VERBOSE;
+	int stat_only = flags & VERIFY_PACK_STAT_ONLY;
 	struct packed_git *pack;
 	int err;
 
@@ -105,14 +114,19 @@ static int verify_one_pack(const char *path, int verbose)
 		return error("packfile %s not found.", arg);
 
 	install_packed_git(pack);
-	err = verify_pack(pack);
 
-	if (verbose) {
+	if (!stat_only)
+		err = verify_pack(pack);
+	else
+		err = open_pack_index(pack);
+
+	if (verbose || stat_only) {
 		if (err)
 			printf("%s: bad\n", pack->pack_name);
 		else {
-			show_pack_info(pack);
-			printf("%s: ok\n", pack->pack_name);
+			show_pack_info(pack, flags);
+			if (!stat_only)
+				printf("%s: ok\n", pack->pack_name);
 		}
 	}
 
@@ -120,17 +134,20 @@ static int verify_one_pack(const char *path, int verbose)
 }
 
 static const char * const verify_pack_usage[] = {
-	"git verify-pack [-v|--verbose] <pack>...",
+	"git verify-pack [-v|--verbose] [-s|--stat-only] <pack>...",
 	NULL
 };
 
 int cmd_verify_pack(int argc, const char **argv, const char *prefix)
 {
 	int err = 0;
-	int verbose = 0;
+	unsigned int flags = 0;
 	int i;
 	const struct option verify_pack_options[] = {
-		OPT__VERBOSE(&verbose),
+		OPT_BIT('v', "verbose", &flags, "verbose",
+			VERIFY_PACK_VERBOSE),
+		OPT_BIT('s', "stat-only", &flags, "show statistics only",
+			VERIFY_PACK_STAT_ONLY),
 		OPT_END()
 	};
 
@@ -140,7 +157,7 @@ int cmd_verify_pack(int argc, const char **argv, const char *prefix)
 	if (argc < 1)
 		usage_with_options(verify_pack_usage, verify_pack_options);
 	for (i = 0; i < argc; i++) {
-		if (verify_one_pack(argv[i], verbose))
+		if (verify_one_pack(argv[i], flags))
 			err = 1;
 		discard_revindex();
 	}
diff --git a/builtin.h b/builtin.h
index 20427d2963..51e4ba7f36 100644
--- a/builtin.h
+++ b/builtin.h
@@ -13,7 +13,6 @@ extern const char git_more_info_string[];
 extern void list_common_cmds_help(void);
 extern const char *help_unknown_cmd(const char *cmd);
 extern void prune_packed_objects(int);
-extern int read_line_with_nul(char *buf, int size, FILE *file);
 extern int fmt_merge_msg(int merge_summary, struct strbuf *in,
 	struct strbuf *out);
 extern int commit_tree(const char *msg, unsigned char *tree,
@@ -112,5 +111,6 @@ extern int cmd_write_tree(int argc, const char **argv, const char *prefix);
 extern int cmd_verify_pack(int argc, const char **argv, const char *prefix);
 extern int cmd_show_ref(int argc, const char **argv, const char *prefix);
 extern int cmd_pack_refs(int argc, const char **argv, const char *prefix);
+extern int cmd_replace(int argc, const char **argv, const char *prefix);
 
 #endif
diff --git a/cache.h b/cache.h
index fda9816139..808dabacd6 100644
--- a/cache.h
+++ b/cache.h
@@ -469,7 +469,7 @@ extern int index_path(unsigned char *sha1, const char *path, struct stat *st, in
 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 
 /* "careful lstat()" */
-extern int check_path(const char *path, int len, struct stat *st);
+extern int check_path(const char *path, int len, struct stat *st, int skiplen);
 
 #define REFRESH_REALLY		0x0001	/* ignore_valid */
 #define REFRESH_UNMERGED	0x0002	/* allow unmerged */
@@ -512,6 +512,7 @@ extern int log_all_ref_updates;
 extern int warn_ambiguous_refs;
 extern int shared_repository;
 extern const char *apply_default_whitespace;
+extern const char *apply_default_ignorewhitespace;
 extern int zlib_compression_level;
 extern int core_compression_level;
 extern int core_compression_seen;
@@ -519,6 +520,7 @@ extern size_t packed_git_window_size;
 extern size_t packed_git_limit;
 extern size_t delta_base_cache_limit;
 extern int auto_crlf;
+extern int read_replace_refs;
 extern int fsync_object_files;
 extern int core_preload_index;
 
@@ -655,7 +657,11 @@ char *strip_path_suffix(const char *path, const char *suffix);
 
 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
 extern int sha1_object_info(const unsigned char *, unsigned long *);
-extern void * read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size);
+extern void *read_sha1_file_repl(const unsigned char *sha1, enum object_type *type, unsigned long *size, const unsigned char **replacement);
+static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
+{
+	return read_sha1_file_repl(sha1, type, size, NULL);
+}
 extern int hash_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1);
 extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
 extern int pretend_sha1_file(void *, unsigned long, enum object_type, unsigned char *);
diff --git a/commit.c b/commit.c
index e2bcbe8149..a6c6f70a92 100644
--- a/commit.c
+++ b/commit.c
@@ -564,13 +564,13 @@ static struct commit_list *merge_bases_many(struct commit *one, int n, struct co
 	while (interesting(list)) {
 		struct commit *commit;
 		struct commit_list *parents;
-		struct commit_list *n;
+		struct commit_list *next;
 		int flags;
 
 		commit = list->item;
-		n = list->next;
+		next = list->next;
 		free(list);
-		list = n;
+		list = next;
 
 		flags = commit->object.flags & (PARENT1 | PARENT2 | STALE);
 		if (flags == (PARENT1 | PARENT2)) {
@@ -598,11 +598,11 @@ static struct commit_list *merge_bases_many(struct commit *one, int n, struct co
 	free_commit_list(list);
 	list = result; result = NULL;
 	while (list) {
-		struct commit_list *n = list->next;
+		struct commit_list *next = list->next;
 		if (!(list->item->object.flags & STALE))
 			insert_by_date(list->item, &result);
 		free(list);
-		list = n;
+		list = next;
 	}
 	return result;
 }
diff --git a/commit.h b/commit.h
index 4886544b63..d1674d7f16 100644
--- a/commit.h
+++ b/commit.h
@@ -123,6 +123,8 @@ struct commit_graft *read_graft_line(char *buf, int len);
 int register_commit_graft(struct commit_graft *, int);
 struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
 
+const unsigned char *lookup_replace_object(const unsigned char *sha1);
+
 extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2, int cleanup);
 extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos, int cleanup);
 extern struct commit_list *get_octopus_merge_bases(struct commit_list *in);
diff --git a/compat/bswap.h b/compat/bswap.h
new file mode 100644
index 0000000000..7246a12c6e
--- /dev/null
+++ b/compat/bswap.h
@@ -0,0 +1,36 @@
+/*
+ * Let's make sure we always have a sane definition for ntohl()/htonl().
+ * Some libraries define those as a function call, just to perform byte
+ * shifting, bringing significant overhead to what should be a simple
+ * operation.
+ */
+
+/*
+ * Default version that the compiler ought to optimize properly with
+ * constant values.
+ */
+static inline unsigned int default_swab32(unsigned int val)
+{
+	return (((val & 0xff000000) >> 24) |
+		((val & 0x00ff0000) >>  8) |
+		((val & 0x0000ff00) <<  8) |
+		((val & 0x000000ff) << 24));
+}
+
+#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
+
+#define bswap32(x) ({ \
+	unsigned int __res; \
+	if (__builtin_constant_p(x)) { \
+		__res = default_swab32(x); \
+	} else { \
+		__asm__("bswap %0" : "=r" (__res) : "0" (x)); \
+	} \
+	__res; })
+
+#undef ntohl
+#undef htonl
+#define ntohl(x) bswap32(x)
+#define htonl(x) bswap32(x)
+
+#endif
diff --git a/compat/snprintf.c b/compat/snprintf.c
index 6c0fb056a5..4d07087abd 100644
--- a/compat/snprintf.c
+++ b/compat/snprintf.c
@@ -3,7 +3,8 @@
 /*
  * The size parameter specifies the available space, i.e. includes
  * the trailing NUL byte; but Windows's vsnprintf expects the
- * number of characters to write without the trailing NUL.
+ * number of characters to write, and does not necessarily write the
+ * trailing NUL.
  */
 #ifndef SNPRINTF_SIZE_CORR
 #if defined(__MINGW32__) && defined(__GNUC__) && __GNUC__ < 4
diff --git a/configure.ac b/configure.ac
index 3f1922d0bf..b09b8e446f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -156,19 +156,11 @@ AC_MSG_NOTICE([CHECKS for site configuration])
 # tests.  These tests take up a significant amount of the total test time
 # but are not needed unless you plan to talk to SVN repos.
 #
-# Define MOZILLA_SHA1 environment variable when running make to make use of
-# a bundled SHA1 routine coming from Mozilla. It is GPL'd and should be fast
-# on non-x86 architectures (e.g. PowerPC), while the OpenSSL version (default
-# choice) has very fast version optimized for i586.
-#
 # Define PPC_SHA1 environment variable when running make to make use of
 # a bundled SHA1 routine optimized for PowerPC.
 #
-# Define ARM_SHA1 environment variable when running make to make use of
-# a bundled SHA1 routine optimized for ARM.
-#
 # Define NO_OPENSSL environment variable if you do not have OpenSSL.
-# This also implies MOZILLA_SHA1.
+# This also implies BLK_SHA1.
 #
 # Define OPENSSLDIR=/foo/bar if your openssl header and library files are in
 # /foo/bar/include and /foo/bar/lib directories.
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 5543dc4d14..bf688e12e6 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -674,6 +674,7 @@ _git_am ()
 	--*)
 		__gitcomp "
 			--3way --committer-date-is-author-date --ignore-date
+			--ignore-whitespace --ignore-space-change
 			--interactive --keep --no-utf8 --signoff --utf8
 			--whitespace=
 			"
@@ -695,6 +696,7 @@ _git_apply ()
 			--stat --numstat --summary --check --index
 			--cached --index-info --reverse --reject --unidiff-zero
 			--apply --no-add --exclude=
+			--ignore-whitespace --ignore-space-change
 			--whitespace= --inaccurate-eof --verbose
 			"
 		return
@@ -1537,6 +1539,7 @@ _git_config ()
 	__gitcomp "
 		add.ignore-errors
 		alias.
+		apply.ignorewhitespace
 		apply.whitespace
 		branch.autosetupmerge
 		branch.autosetuprebase
diff --git a/contrib/fast-import/git-p4 b/contrib/fast-import/git-p4
index 342529db30..38438f3c4a 100755
--- a/contrib/fast-import/git-p4
+++ b/contrib/fast-import/git-p4
@@ -201,7 +201,7 @@ def isModeExec(mode):
 def isModeExecChanged(src_mode, dst_mode):
     return isModeExec(src_mode) != isModeExec(dst_mode)
 
-def p4CmdList(cmd, stdin=None, stdin_mode='w+b'):
+def p4CmdList(cmd, stdin=None, stdin_mode='w+b', cb=None):
     cmd = p4_build_cmd("-G %s" % (cmd))
     if verbose:
         sys.stderr.write("Opening pipe: %s\n" % cmd)
@@ -224,7 +224,10 @@ def p4CmdList(cmd, stdin=None, stdin_mode='w+b'):
     try:
         while True:
             entry = marshal.load(p4.stdout)
-            result.append(entry)
+	    if cb is not None:
+		cb(entry)
+	    else:
+		result.append(entry)
     except EOFError:
         pass
     exitCode = p4.wait()
@@ -950,10 +953,84 @@ class P4Sync(Command):
 
         return branches
 
-    ## Should move this out, doesn't use SELF.
-    def readP4Files(self, files):
+    # output one file from the P4 stream
+    # - helper for streamP4Files
+
+    def streamOneP4File(self, file, contents):
+	if file["type"] == "apple":
+	    print "\nfile %s is a strange apple file that forks. Ignoring" % \
+		file['depotFile']
+	    return
+
+        relPath = self.stripRepoPath(file['depotFile'], self.branchPrefixes)
+        if verbose:
+            sys.stderr.write("%s\n" % relPath)
+
+        mode = "644"
+        if isP4Exec(file["type"]):
+            mode = "755"
+        elif file["type"] == "symlink":
+            mode = "120000"
+            # p4 print on a symlink contains "target\n", so strip it off
+            last = contents.pop()
+            last = last[:-1]
+            contents.append(last)
+
+        if self.isWindows and file["type"].endswith("text"):
+            mangled = []
+            for data in contents:
+                data = data.replace("\r\n", "\n")
+                mangled.append(data)
+            contents = mangled
+
+        if file['type'] in ('text+ko', 'unicode+ko', 'binary+ko'):
+            contents = map(lambda text: re.sub(r'(?i)\$(Id|Header):[^$]*\$',r'$\1$', text), contents)
+        elif file['type'] in ('text+k', 'ktext', 'kxtext', 'unicode+k', 'binary+k'):
+            contents = map(lambda text: re.sub(r'\$(Id|Header|Author|Date|DateTime|Change|File|Revision):[^$\n]*\$',r'$\1$', text), contents)
+
+        self.gitStream.write("M %s inline %s\n" % (mode, relPath))
+
+        # total length...
+        length = 0
+        for d in contents:
+            length = length + len(d)
+
+        self.gitStream.write("data %d\n" % length)
+        for d in contents:
+            self.gitStream.write(d)
+        self.gitStream.write("\n")
+
+    def streamOneP4Deletion(self, file):
+        relPath = self.stripRepoPath(file['path'], self.branchPrefixes)
+        if verbose:
+            sys.stderr.write("delete %s\n" % relPath)
+        self.gitStream.write("D %s\n" % relPath)
+
+    # handle another chunk of streaming data
+    def streamP4FilesCb(self, marshalled):
+
+	if marshalled.has_key('depotFile') and self.stream_have_file_info:
+	    # start of a new file - output the old one first
+	    self.streamOneP4File(self.stream_file, self.stream_contents)
+	    self.stream_file = {}
+	    self.stream_contents = []
+	    self.stream_have_file_info = False
+
+	# pick up the new file information... for the
+	# 'data' field we need to append to our array
+	for k in marshalled.keys():
+	    if k == 'data':
+		self.stream_contents.append(marshalled['data'])
+	    else:
+		self.stream_file[k] = marshalled[k]
+
+	self.stream_have_file_info = True
+
+    # Stream directly from "p4 files" into "git fast-import"
+    def streamP4Files(self, files):
         filesForCommit = []
         filesToRead = []
+        filesToDelete = []
 
         for f in files:
             includeFile = True
@@ -967,50 +1044,35 @@ class P4Sync(Command):
                 filesForCommit.append(f)
                 if f['action'] not in ('delete', 'purge'):
                     filesToRead.append(f)
+                else:
+                    filesToDelete.append(f)
 
-        filedata = []
-        if len(filesToRead) > 0:
-            filedata = p4CmdList('-x - print',
-                                 stdin='\n'.join(['%s#%s' % (f['path'], f['rev'])
-                                                  for f in filesToRead]),
-                                 stdin_mode='w+')
-
-            if "p4ExitCode" in filedata[0]:
-                die("Problems executing p4. Error: [%d]."
-                    % (filedata[0]['p4ExitCode']));
-
-        j = 0;
-        contents = {}
-        while j < len(filedata):
-            stat = filedata[j]
-            j += 1
-            text = ''
-            while j < len(filedata) and filedata[j]['code'] in ('text', 'unicode', 'binary'):
-                text += filedata[j]['data']
-                del filedata[j]['data']
-                j += 1
-
-            if not stat.has_key('depotFile'):
-                sys.stderr.write("p4 print fails with: %s\n" % repr(stat))
-                continue
+        # deleted files...
+        for f in filesToDelete:
+            self.streamOneP4Deletion(f)
 
-            if stat['type'] in ('text+ko', 'unicode+ko', 'binary+ko'):
-                text = re.sub(r'(?i)\$(Id|Header):[^$]*\$',r'$\1$', text)
-            elif stat['type'] in ('text+k', 'ktext', 'kxtext', 'unicode+k', 'binary+k'):
-                text = re.sub(r'\$(Id|Header|Author|Date|DateTime|Change|File|Revision):[^$\n]*\$',r'$\1$', text)
+        if len(filesToRead) > 0:
+            self.stream_file = {}
+            self.stream_contents = []
+            self.stream_have_file_info = False
 
-            contents[stat['depotFile']] = text
+	    # curry self argument
+	    def streamP4FilesCbSelf(entry):
+		self.streamP4FilesCb(entry)
 
-        for f in filesForCommit:
-            path = f['path']
-            if contents.has_key(path):
-                f['data'] = contents[path]
+	    p4CmdList("-x - print",
+		'\n'.join(['%s#%s' % (f['path'], f['rev'])
+                                                  for f in filesToRead]),
+	        cb=streamP4FilesCbSelf)
 
-        return filesForCommit
+            # do the last chunk
+            if self.stream_file.has_key('depotFile'):
+                self.streamOneP4File(self.stream_file, self.stream_contents)
 
     def commit(self, details, files, branch, branchPrefixes, parent = ""):
         epoch = details["time"]
         author = details["user"]
+	self.branchPrefixes = branchPrefixes
 
         if self.verbose:
             print "commit into %s" % branch
@@ -1023,7 +1085,6 @@ class P4Sync(Command):
                 new_files.append (f)
             else:
                 sys.stderr.write("Ignoring file outside of prefix: %s\n" % path)
-        files = self.readP4Files(new_files)
 
         self.gitStream.write("commit %s\n" % branch)
 #        gitStream.write("mark :%s\n" % details["change"])
@@ -1051,33 +1112,7 @@ class P4Sync(Command):
                 print "parent %s" % parent
             self.gitStream.write("from %s\n" % parent)
 
-        for file in files:
-            if file["type"] == "apple":
-                print "\nfile %s is a strange apple file that forks. Ignoring!" % file['path']
-                continue
-
-            relPath = self.stripRepoPath(file['path'], branchPrefixes)
-            if file["action"] in ("delete", "purge"):
-                self.gitStream.write("D %s\n" % relPath)
-            else:
-                data = file['data']
-
-                mode = "644"
-                if isP4Exec(file["type"]):
-                    mode = "755"
-                elif file["type"] == "symlink":
-                    mode = "120000"
-                    # p4 print on a symlink contains "target\n", so strip it off
-                    data = data[:-1]
-
-                if self.isWindows and file["type"].endswith("text"):
-                    data = data.replace("\r\n", "\n")
-
-                self.gitStream.write("M %s inline %s\n" % (mode, relPath))
-                self.gitStream.write("data %s\n" % len(data))
-                self.gitStream.write(data)
-                self.gitStream.write("\n")
-
+        self.streamP4Files(new_files)
         self.gitStream.write("\n")
 
         change = int(details["change"])
diff --git a/date.c b/date.c
index 409a17d464..f011692c2f 100644
--- a/date.c
+++ b/date.c
@@ -135,7 +135,7 @@ const char *show_date(unsigned long time, int tz, enum date_mode mode)
 		}
 		/* Give years and months for 5 years or so */
 		if (diff < 1825) {
-			unsigned long years = (diff + 183) / 365;
+			unsigned long years = diff / 365;
 			unsigned long months = (diff % 365 + 15) / 30;
 			int n;
 			n = snprintf(timebuf, sizeof(timebuf), "%lu year%s",
diff --git a/diff-lib.c b/diff-lib.c
index ad2a4cde74..0c74ef5cbe 100644
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -162,7 +162,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
 		if (ce_uptodate(ce))
 			continue;
 
-		changed = check_removed(ce, &st);
+		/* If CE_VALID is set, don't look at workdir for file removal */
+		changed = (ce->ce_flags & CE_VALID) ? 0 : check_removed(ce, &st);
 		if (changed) {
 			if (changed < 0) {
 				perror(ce->name);
@@ -308,22 +309,6 @@ static int show_modified(struct rev_info *revs,
 	return 0;
 }
 
-/*
- * This turns all merge entries into "stage 3". That guarantees that
- * when we read in the new tree (into "stage 1"), we won't lose sight
- * of the fact that we had unmerged entries.
- */
-static void mark_merge_entries(void)
-{
-	int i;
-	for (i = 0; i < active_nr; i++) {
-		struct cache_entry *ce = active_cache[i];
-		if (!ce_stage(ce))
-			continue;
-		ce->ce_flags |= CE_STAGEMASK;
-	}
-}
-
 /*
  * This gets a mix of an existing index and a tree, one pathname entry
  * at a time. The index entry may be a single stage-0 one, but it could
@@ -337,6 +322,8 @@ static void do_oneway_diff(struct unpack_trees_options *o,
 	struct rev_info *revs = o->unpack_data;
 	int match_missing, cached;
 
+	/* if the entry is not checked out, don't examine work tree */
+	cached = o->index_only || (idx && (idx->ce_flags & CE_VALID));
 	/*
 	 * Backward compatibility wart - "diff-index -m" does
 	 * not mean "do not ignore merges", but "match_missing".
@@ -344,12 +331,11 @@ static void do_oneway_diff(struct unpack_trees_options *o,
 	 * But with the revision flag parsing, that's found in
 	 * "!revs->ignore_merges".
 	 */
-	cached = o->index_only;
 	match_missing = !revs->ignore_merges;
 
 	if (cached && idx && ce_stage(idx)) {
-		if (tree)
-			diff_unmerge(&revs->diffopt, idx->name, idx->ce_mode, idx->sha1);
+		diff_unmerge(&revs->diffopt, idx->name, idx->ce_mode,
+			     idx->sha1);
 		return;
 	}
 
@@ -435,8 +421,6 @@ int run_diff_index(struct rev_info *revs, int cached)
 	struct unpack_trees_options opts;
 	struct tree_desc t;
 
-	mark_merge_entries();
-
 	ent = revs->pending.objects[0].item;
 	tree_name = revs->pending.objects[0].name;
 	tree = parse_tree_indirect(ent->sha1);
diff --git a/entry.c b/entry.c
index f276cf3b88..06d24f14c6 100644
--- a/entry.c
+++ b/entry.c
@@ -177,11 +177,15 @@ static int write_entry(struct cache_entry *ce, char *path, const struct checkout
 
 /*
  * This is like 'lstat()', except it refuses to follow symlinks
- * in the path.
+ * in the path, after skipping "skiplen".
  */
-int check_path(const char *path, int len, struct stat *st)
+int check_path(const char *path, int len, struct stat *st, int skiplen)
 {
-	if (has_symlink_leading_path(path, len)) {
+	const char *slash = path + len;
+
+	while (path < slash && *slash != '/')
+		slash--;
+	if (!has_dirs_only_path(path, slash - path, skiplen)) {
 		errno = ENOENT;
 		return -1;
 	}
@@ -201,7 +205,7 @@ int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *t
 	strcpy(path + len, ce->name);
 	len += ce_namelen(ce);
 
-	if (!check_path(path, len, &st)) {
+	if (!check_path(path, len, &st, state->base_dir_len)) {
 		unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID);
 		if (!changed)
 			return 0;
diff --git a/environment.c b/environment.c
index 8f5eaa7dd8..5de6837840 100644
--- a/environment.c
+++ b/environment.c
@@ -26,6 +26,7 @@ const char *git_commit_encoding;
 const char *git_log_output_encoding;
 int shared_repository = PERM_UMASK;
 const char *apply_default_whitespace;
+const char *apply_default_ignorewhitespace;
 int zlib_compression_level = Z_BEST_SPEED;
 int core_compression_level;
 int core_compression_seen;
@@ -38,6 +39,7 @@ int pager_use_color = 1;
 const char *editor_program;
 const char *excludes_file;
 int auto_crlf = 0;	/* 1: both ways, -1: only when adding git objects */
+int read_replace_refs = 1;
 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
diff --git a/git-am.sh b/git-am.sh
index f719f6e654..3c03f3e0df 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -16,6 +16,8 @@ s,signoff       add a Signed-off-by line to the commit message
 u,utf8          recode into utf8 (default)
 k,keep          pass -k flag to git-mailinfo
 whitespace=     pass it through git-apply
+ignore-space-change pass it through git-apply
+ignore-whitespace pass it through git-apply
 directory=      pass it through git-apply
 C=              pass it through git-apply
 p=              pass it through git-apply
@@ -211,7 +213,13 @@ check_patch_format () {
 split_patches () {
 	case "$patch_format" in
 	mbox)
-		git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||
+		case "$rebasing" in
+		'')
+			keep_cr= ;;
+		?*)
+			keep_cr=--keep-cr ;;
+		esac
+		git mailsplit -d"$prec" -o"$dotest" -b $keep_cr -- "$@" > "$dotest/last" ||
 		clean_abort
 		;;
 	stgit-series)
@@ -321,7 +329,7 @@ do
 		git_apply_opt="$git_apply_opt $(sq "$1$2")"; shift ;;
 	--patch-format)
 		shift ; patch_format="$1" ;;
-	--reject)
+	--reject|--ignore-whitespace|--ignore-space-change)
 		git_apply_opt="$git_apply_opt $1" ;;
 	--committer-date-is-author-date)
 		committer_date_is_author_date=t ;;
diff --git a/git-bisect.sh b/git-bisect.sh
index 8969553658..6f6f03966f 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -405,7 +405,7 @@ bisect_run () {
 	  exit $res
       fi
 
-      if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
+      if grep "is the first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
 	  echo "bisect run success"
 	  exit 0;
       fi
diff --git a/git-compat-util.h b/git-compat-util.h
index 71b5acb6fa..e5e9f39c56 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -174,6 +174,8 @@ extern char *gitbasename(char *);
 #endif
 #endif
 
+#include "compat/bswap.h"
+
 /* General helper functions */
 extern void usage(const char *err) NORETURN;
 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
diff --git a/git-instaweb.sh b/git-instaweb.sh
index 5f5cac75ea..d96eddbe56 100755
--- a/git-instaweb.sh
+++ b/git-instaweb.sh
@@ -77,11 +77,30 @@ start_httpd () {
 	resolve_full_httpd
 
 	# don't quote $full_httpd, there can be arguments to it (-f)
-	$full_httpd "$fqgitdir/gitweb/httpd.conf"
-	if test $? != 0; then
-		echo "Could not execute http daemon $httpd."
-		exit 1
-	fi
+	case "$httpd" in
+	*mongoose*)
+		#The mongoose server doesn't have a daemon mode so we'll have to fork it
+		$full_httpd "$fqgitdir/gitweb/httpd.conf" &
+		#Save the pid before doing anything else (we'll print it later)
+		pid=$!
+
+		if test $? != 0; then
+			echo "Could not execute http daemon $httpd."
+			exit 1
+		fi
+
+		cat > "$fqgitdir/pid" <<EOF
+$pid
+EOF
+		;;
+	*)
+		$full_httpd "$fqgitdir/gitweb/httpd.conf"
+		if test $? != 0; then
+			echo "Could not execute http daemon $httpd."
+			exit 1
+		fi
+		;;
+	esac
 }
 
 stop_httpd () {
@@ -308,6 +327,31 @@ EOF
 	fi
 }
 
+mongoose_conf() {
+	cat > "$conf" <<EOF
+# Mongoose web server configuration file.
+# Lines starting with '#' and empty lines are ignored.
+# For detailed description of every option, visit
+# http://code.google.com/p/mongoose/wiki/MongooseManual
+
+root		$fqgitdir/gitweb
+ports		$port
+index_files	gitweb.cgi
+#ssl_cert	$fqgitdir/gitweb/ssl_cert.pem
+error_log	$fqgitdir/gitweb/error.log
+access_log	$fqgitdir/gitweb/access.log
+
+#cgi setup
+cgi_env		PATH=/usr/local/bin:/usr/bin:/bin,GIT_DIR=$GIT_DIR,GIT_EXEC_PATH=$GIT_EXEC_PATH
+cgi_interp	$PERL
+cgi_ext		cgi,pl
+
+# mimetype mapping
+mime_types	.gz=application/x-gzip,.tar.gz=application/x-tgz,.tgz=application/x-tgz,.tar=application/x-tar,.zip=application/zip,.gif=image/gif,.jpg=image/jpeg,.jpeg=image/jpeg,.png=image/png,.css=text/css,.html=text/html,.htm=text/html,.js=text/javascript,.c=text/plain,.cpp=text/plain,.log=text/plain,.conf=text/plain,.text=text/plain,.txt=text/plain,.dtd=text/xml,.bz2=application/x-bzip,.tbz=application/x-bzip-compressed-tar,.tar.bz2=application/x-bzip-compressed-tar
+EOF
+}
+
+
 script='
 s#^(my|our) \$projectroot =.*#$1 \$projectroot = "'$(dirname "$fqgitdir")'";#;
 s#(my|our) \$gitbin =.*#$1 \$gitbin = "'$GIT_EXEC_PATH'";#;
@@ -344,6 +388,9 @@ case "$httpd" in
 webrick)
 	webrick_conf
 	;;
+*mongoose*)
+	mongoose_conf
+	;;
 *)
 	echo "Unknown httpd specified: $httpd"
 	exit 1
diff --git a/git-rebase.sh b/git-rebase.sh
index 3555d17a5d..2315d95a9f 100755
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -333,6 +333,9 @@ do
 			;;
 		esac
 		;;
+	--ignore-whitespace)
+		git_am_opt="$git_am_opt $1"
+		;;
 	--committer-date-is-author-date|--ignore-date)
 		git_am_opt="$git_am_opt $1"
 		force_rebase=t
diff --git a/git-stash.sh b/git-stash.sh
index 03e589f764..d61c9d03bc 100755
--- a/git-stash.sh
+++ b/git-stash.sh
@@ -162,10 +162,6 @@ show_stash () {
 }
 
 apply_stash () {
-	git update-index -q --refresh &&
-	git diff-files --quiet --ignore-submodules ||
-		die 'Cannot apply to a dirty working tree, please stage your changes'
-
 	unstash_index=
 
 	while test $# != 0
@@ -184,18 +180,27 @@ apply_stash () {
 		shift
 	done
 
-	# current index state
-	c_tree=$(git write-tree) ||
-		die 'Cannot apply a stash in the middle of a merge'
+	if test $# = 0
+	then
+		have_stash || die 'Nothing to apply'
+	fi
 
 	# stash records the work tree, and is a merge between the
 	# base commit (first parent) and the index tree (second parent).
-	s=$(git rev-parse --verify --default $ref_stash "$@") &&
-	w_tree=$(git rev-parse --verify "$s:") &&
-	b_tree=$(git rev-parse --verify "$s^1:") &&
-	i_tree=$(git rev-parse --verify "$s^2:") ||
+	s=$(git rev-parse --quiet --verify --default $ref_stash "$@") &&
+	w_tree=$(git rev-parse --quiet --verify "$s:") &&
+	b_tree=$(git rev-parse --quiet --verify "$s^1:") &&
+	i_tree=$(git rev-parse --quiet --verify "$s^2:") ||
 		die "$*: no valid stashed state found"
 
+	git update-index -q --refresh &&
+	git diff-files --quiet --ignore-submodules ||
+		die 'Cannot apply to a dirty working tree, please stage your changes'
+
+	# current index state
+	c_tree=$(git write-tree) ||
+		die 'Cannot apply a stash in the middle of a merge'
+
 	unstashed_index_tree=
 	if test -n "$unstash_index" && test "$b_tree" != "$i_tree" &&
 			test "$c_tree" != "$i_tree"
diff --git a/git-submodule.sh b/git-submodule.sh
index ebed711da4..bfbd36b6f4 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -4,9 +4,14 @@
 #
 # Copyright (c) 2007 Lars Hjemli
 
-USAGE="[--quiet] [--cached] \
-[add [-b branch] <repo> <path>]|[status|init|update [-i|--init] [-N|--no-fetch] [--rebase|--merge]|summary [-n|--summary-limit <n>] [<commit>]] \
-[--] [<path>...]|[foreach <command>]|[sync [--] [<path>...]]"
+dashless=$(basename "$0" | sed -e 's/-/ /')
+USAGE="[--quiet] add [-b branch] [--reference <repository>] [--] <repository> <path>
+   or: $dashless [--quiet] status [--cached] [--recursive] [--] [<path>...]
+   or: $dashless [--quiet] init [--] [<path>...]
+   or: $dashless [--quiet] update [--init] [-N|--no-fetch] [--rebase] [--reference <repository>] [--merge] [--recursive] [--] [<path>...]
+   or: $dashless [--quiet] summary [--cached|--files] [--summary-limit <n>] [commit] [--] [<path>...]
+   or: $dashless [--quiet] foreach [--recursive] <command>
+   or: $dashless [--quiet] sync [--] [<path>...]"
 OPTIONS_SPEC=
 . git-sh-setup
 . git-parse-remote
@@ -16,8 +21,10 @@ command=
 branch=
 reference=
 cached=
+files=
 nofetch=
 update=
+prefix=
 
 # Resolve relative url by appending to parent's url
 resolve_relative_url ()
@@ -237,13 +244,43 @@ cmd_add()
 #
 cmd_foreach()
 {
+	# parse $args after "submodule ... foreach".
+	while test $# -ne 0
+	do
+		case "$1" in
+		-q|--quiet)
+			GIT_QUIET=1
+			;;
+		--recursive)
+			recursive=1
+			;;
+		-*)
+			usage
+			;;
+		*)
+			break
+			;;
+		esac
+		shift
+	done
+
 	module_list |
 	while read mode sha1 stage path
 	do
 		if test -e "$path"/.git
 		then
-			say "Entering '$path'"
-			(cd "$path" && eval "$@") ||
+			say "Entering '$prefix$path'"
+			name=$(module_name "$path")
+			(
+				prefix="$prefix$path/"
+				unset GIT_DIR
+				cd "$path" &&
+				eval "$@" &&
+				if test -n "$recursive"
+				then
+					cmd_foreach "--recursive" "$@"
+				fi
+			) ||
 			die "Stopping at '$path'; script returned non-zero status."
 		fi
 	done
@@ -316,6 +353,7 @@ cmd_init()
 cmd_update()
 {
 	# parse $args after "submodule ... update".
+	orig_args="$@"
 	while test $# -ne 0
 	do
 		case "$1" in
@@ -348,6 +386,10 @@ cmd_update()
 			shift
 			update="merge"
 			;;
+		--recursive)
+			shift
+			recursive=1
+			;;
 		--)
 			shift
 			break
@@ -434,6 +476,12 @@ cmd_update()
 			die "Unable to $action '$sha1' in submodule path '$path'"
 			say "Submodule path '$path': $msg '$sha1'"
 		fi
+
+		if test -n "$recursive"
+		then
+			(unset GIT_DIR; cd "$path" && cmd_update $orig_args) ||
+			die "Failed to recurse into submodule path '$path'"
+		fi
 	done
 }
 
@@ -460,6 +508,7 @@ set_name_rev () {
 cmd_summary() {
 	summary_limit=-1
 	for_status=
+	diff_cmd=diff-index
 
 	# parse $args after "submodule ... summary".
 	while test $# -ne 0
@@ -468,6 +517,9 @@ cmd_summary() {
 		--cached)
 			cached="$1"
 			;;
+		--files)
+			files="$1"
+			;;
 		--for-status)
 			for_status="$1"
 			;;
@@ -504,9 +556,17 @@ cmd_summary() {
 		head=HEAD
 	fi
 
+	if [ -n "$files" ]
+	then
+		test -n "$cached" &&
+		die "--cached cannot be used with --files"
+		diff_cmd=diff-files
+		head=
+	fi
+
 	cd_to_toplevel
 	# Get modified modules cared by user
-	modules=$(git diff-index $cached --raw $head -- "$@" |
+	modules=$(git $diff_cmd $cached --raw $head -- "$@" |
 		egrep '^:([0-7]* )?160000' |
 		while read mod_src mod_dst sha1_src sha1_dst status name
 		do
@@ -520,7 +580,7 @@ cmd_summary() {
 
 	test -z "$modules" && return
 
-	git diff-index $cached --raw $head -- $modules |
+	git $diff_cmd $cached --raw $head -- $modules |
 	egrep '^:([0-7]* )?160000' |
 	cut -c2- |
 	while read mod_src mod_dst sha1_src sha1_dst status name
@@ -643,6 +703,7 @@ cmd_summary() {
 cmd_status()
 {
 	# parse $args after "submodule ... status".
+	orig_args="$@"
 	while test $# -ne 0
 	do
 		case "$1" in
@@ -652,6 +713,9 @@ cmd_status()
 		--cached)
 			cached=1
 			;;
+		--recursive)
+			recursive=1
+			;;
 		--)
 			shift
 			break
@@ -671,22 +735,34 @@ cmd_status()
 	do
 		name=$(module_name "$path") || exit
 		url=$(git config submodule."$name".url)
+		displaypath="$prefix$path"
 		if test -z "$url" || ! test -d "$path"/.git -o -f "$path"/.git
 		then
-			say "-$sha1 $path"
+			say "-$sha1 $displaypath"
 			continue;
 		fi
 		set_name_rev "$path" "$sha1"
 		if git diff-files --quiet -- "$path"
 		then
-			say " $sha1 $path$revname"
+			say " $sha1 $displaypath$revname"
 		else
 			if test -z "$cached"
 			then
 				sha1=$(unset GIT_DIR; cd "$path" && git rev-parse --verify HEAD)
 				set_name_rev "$path" "$sha1"
 			fi
-			say "+$sha1 $path$revname"
+			say "+$sha1 $displaypath$revname"
+		fi
+
+		if test -n "$recursive"
+		then
+			(
+				prefix="$displaypath/"
+				unset GIT_DIR
+				cd "$path" &&
+				cmd_status $orig_args
+			) ||
+			die "Failed to recurse into submodule path '$path'"
 		fi
 	done
 }
diff --git a/git.c b/git.c
index 4588a8bac2..5da6c65697 100644
--- a/git.c
+++ b/git.c
@@ -339,6 +339,7 @@ static void handle_internal_command(int argc, const char **argv)
 		{ "receive-pack", cmd_receive_pack },
 		{ "reflog", cmd_reflog, RUN_SETUP },
 		{ "remote", cmd_remote, RUN_SETUP },
+		{ "replace", cmd_replace, RUN_SETUP },
 		{ "repo-config", cmd_config },
 		{ "rerere", cmd_rerere, RUN_SETUP },
 		{ "reset", cmd_reset, RUN_SETUP },
diff --git a/gitweb/INSTALL b/gitweb/INSTALL
index 18c9ce35e8..b76a0cffff 100644
--- a/gitweb/INSTALL
+++ b/gitweb/INSTALL
@@ -123,6 +123,15 @@ GITWEB_CONFIG file:
 	$feature{'snapshot'}{'default'} = ['zip', 'tgz'];
 	$feature{'snapshot'}{'override'} = 1;
 
+If you allow overriding for the snapshot feature, you can specify which
+snapshot formats are globally disabled. You can also add any command line
+options you want (such as setting the compression level). For instance,
+you can disable Zip compressed snapshots and set GZip to run at level 6 by
+adding the following lines to your $GITWEB_CONFIG:
+
+	$known_snapshot_formats{'zip'}{'disabled'} = 1;
+	$known_snapshot_formats{'tgz'}{'compressor'} = ['gzip','-6'];
+
 
 Gitweb repositories
 -------------------
diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index be7358fdeb..ff2d42abb9 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -160,7 +160,8 @@ BEGIN
 	# 	'suffix' => filename suffix,
 	# 	'format' => --format for git-archive,
 	# 	'compressor' => [compressor command and arguments]
-	# 	                (array reference, optional)}
+	# 	                (array reference, optional)
+	# 	'disabled' => boolean (optional)}
 	#
 	'tgz' => {
 		'display' => 'tar.gz',
@@ -176,6 +177,14 @@ BEGIN
 		'format' => 'tar',
 		'compressor' => ['bzip2']},
 
+	'txz' => {
+		'display' => 'tar.xz',
+		'type' => 'application/x-xz',
+		'suffix' => '.tar.xz',
+		'format' => 'tar',
+		'compressor' => ['xz'],
+		'disabled' => 1},
+
 	'zip' => {
 		'display' => 'zip',
 		'type' => 'application/x-zip',
@@ -188,6 +197,7 @@ BEGIN
 our %known_snapshot_format_aliases = (
 	'gzip'  => 'tgz',
 	'bzip2' => 'tbz2',
+	'xz'    => 'txz',
 
 	# backward compatibility: legacy gitweb config support
 	'x-gzip' => undef, 'gz' => undef,
@@ -405,7 +415,7 @@ sub gitweb_get_feature {
 		@{$feature{$name}{'default'}});
 	if (!$override) { return @defaults; }
 	if (!defined $sub) {
-		warn "feature $name is not overrideable";
+		warn "feature $name is not overridable";
 		return @defaults;
 	}
 	return $sub->(@defaults);
@@ -494,7 +504,8 @@ sub filter_snapshot_fmts {
 		exists $known_snapshot_format_aliases{$_} ?
 		       $known_snapshot_format_aliases{$_} : $_} @fmts;
 	@fmts = grep {
-		exists $known_snapshot_formats{$_} } @fmts;
+		exists $known_snapshot_formats{$_} &&
+		!$known_snapshot_formats{$_}{'disabled'}} @fmts;
 }
 
 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
@@ -1513,10 +1524,10 @@ sub format_subject_html {
 		$long =~ s/[[:cntrl:]]/?/g;
 		return $cgi->a({-href => $href, -class => "list subject",
 		                -title => to_utf8($long)},
-		       esc_html($short) . $extra);
+		       esc_html($short)) . $extra;
 	} else {
 		return $cgi->a({-href => $href, -class => "list subject"},
-		       esc_html($long)  . $extra);
+		       esc_html($long)) . $extra;
 	}
 }
 
@@ -5181,6 +5192,8 @@ sub git_snapshot {
 		die_error(400, "Unknown snapshot format");
 	} elsif (!grep($_ eq $format, @snapshot_fmts)) {
 		die_error(403, "Unsupported snapshot format");
+	} elsif ($known_snapshot_formats{$format}{'disabled'}) {
+		die_error(403, "Snapshot format not allowed");
 	}
 
 	if (!defined $hash) {
diff --git a/graph.c b/graph.c
index f3226ec94a..6746d422a9 100644
--- a/graph.c
+++ b/graph.c
@@ -291,9 +291,10 @@ static int graph_is_interesting(struct git_graph *graph, struct commit *commit)
 	}
 
 	/*
-	 * Uninteresting and pruned commits won't be printed
+	 * Otherwise, use get_commit_action() to see if this commit is
+	 * interesting
 	 */
-	return (commit->object.flags & (UNINTERESTING | TREESAME)) ? 0 : 1;
+	return get_commit_action(graph->revs, commit) == commit_show;
 }
 
 static struct commit_list *next_interesting_parent(struct git_graph *graph,
diff --git a/http.c b/http.c
index eb0c669801..5926c5b3f7 100644
--- a/http.c
+++ b/http.c
@@ -1289,5 +1289,10 @@ void release_http_object_request(struct http_object_request *freq)
 		free(freq->url);
 		freq->url = NULL;
 	}
-	freq->slot = NULL;
+	if (freq->slot != NULL) {
+		freq->slot->callback_func = NULL;
+		freq->slot->callback_data = NULL;
+		release_active_slot(freq->slot);
+		freq->slot = NULL;
+	}
 }
diff --git a/log-tree.c b/log-tree.c
index a3b4c0692c..1c9eefee33 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -25,7 +25,8 @@ static int add_ref_decoration(const char *refname, const unsigned char *sha1, in
 	struct object *obj = parse_object(sha1);
 	if (!obj)
 		return 0;
-	refname = prettify_refname(refname);
+	if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
+		refname = prettify_refname(refname);
 	add_name_decoration("", refname, obj);
 	while (obj->type == OBJ_TAG) {
 		obj = ((struct tag *)obj)->tagged;
@@ -36,12 +37,12 @@ static int add_ref_decoration(const char *refname, const unsigned char *sha1, in
 	return 0;
 }
 
-void load_ref_decorations(void)
+void load_ref_decorations(int flags)
 {
 	static int loaded;
 	if (!loaded) {
 		loaded = 1;
-		for_each_ref(add_ref_decoration, NULL);
+		for_each_ref(add_ref_decoration, &flags);
 	}
 }
 
diff --git a/log-tree.h b/log-tree.h
index 20b5caf1aa..3f7b40027b 100644
--- a/log-tree.h
+++ b/log-tree.h
@@ -17,7 +17,7 @@ void log_write_email_headers(struct rev_info *opt, struct commit *commit,
 			     const char **subject_p,
 			     const char **extra_headers_p,
 			     int *need_8bit_cte_p);
-void load_ref_decorations(void);
+void load_ref_decorations(int flags);
 
 #define FORMAT_PATCH_NAME_MAX 64
 void get_patch_filename(struct commit *commit, int nr, const char *suffix,
diff --git a/mktag.c b/mktag.c
index a609e3ebd1..a3b4270c18 100644
--- a/mktag.c
+++ b/mktag.c
@@ -19,16 +19,17 @@
 /*
  * We refuse to tag something we can't verify. Just because.
  */
-static int verify_object(unsigned char *sha1, const char *expected_type)
+static int verify_object(const unsigned char *sha1, const char *expected_type)
 {
 	int ret = -1;
 	enum object_type type;
 	unsigned long size;
-	void *buffer = read_sha1_file(sha1, &type, &size);
+	const unsigned char *repl;
+	void *buffer = read_sha1_file_repl(sha1, &type, &size, &repl);
 
 	if (buffer) {
 		if (type == type_from_string(expected_type))
-			ret = check_sha1_signature(sha1, buffer, size, expected_type);
+			ret = check_sha1_signature(repl, buffer, size, expected_type);
 		free(buffer);
 	}
 	return ret;
diff --git a/mozilla-sha1/sha1.c b/mozilla-sha1/sha1.c
deleted file mode 100644
index 95a4ebf496..0000000000
--- a/mozilla-sha1/sha1.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is SHA 180-1 Reference Implementation (Compact version)
- *
- * The Initial Developer of the Original Code is Paul Kocher of
- * Cryptography Research.  Portions created by Paul Kocher are
- * Copyright (C) 1995-9 by Cryptography Research, Inc.  All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- *     Paul Kocher
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above.  If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-#include "sha1.h"
-
-static void shaHashBlock(moz_SHA_CTX *ctx);
-
-void moz_SHA1_Init(moz_SHA_CTX *ctx) {
-  int i;
-
-  ctx->lenW = 0;
-  ctx->sizeHi = ctx->sizeLo = 0;
-
-  /* Initialize H with the magic constants (see FIPS180 for constants)
-   */
-  ctx->H[0] = 0x67452301;
-  ctx->H[1] = 0xefcdab89;
-  ctx->H[2] = 0x98badcfe;
-  ctx->H[3] = 0x10325476;
-  ctx->H[4] = 0xc3d2e1f0;
-
-  for (i = 0; i < 80; i++)
-    ctx->W[i] = 0;
-}
-
-
-void moz_SHA1_Update(moz_SHA_CTX *ctx, const void *_dataIn, int len) {
-  const unsigned char *dataIn = _dataIn;
-  int i;
-
-  /* Read the data into W and process blocks as they get full
-   */
-  for (i = 0; i < len; i++) {
-    ctx->W[ctx->lenW / 4] <<= 8;
-    ctx->W[ctx->lenW / 4] |= (unsigned int)dataIn[i];
-    if ((++ctx->lenW) % 64 == 0) {
-      shaHashBlock(ctx);
-      ctx->lenW = 0;
-    }
-    ctx->sizeLo += 8;
-    ctx->sizeHi += (ctx->sizeLo < 8);
-  }
-}
-
-
-void moz_SHA1_Final(unsigned char hashout[20], moz_SHA_CTX *ctx) {
-  unsigned char pad0x80 = 0x80;
-  unsigned char pad0x00 = 0x00;
-  unsigned char padlen[8];
-  int i;
-
-  /* Pad with a binary 1 (e.g. 0x80), then zeroes, then length
-   */
-  padlen[0] = (unsigned char)((ctx->sizeHi >> 24) & 255);
-  padlen[1] = (unsigned char)((ctx->sizeHi >> 16) & 255);
-  padlen[2] = (unsigned char)((ctx->sizeHi >> 8) & 255);
-  padlen[3] = (unsigned char)((ctx->sizeHi >> 0) & 255);
-  padlen[4] = (unsigned char)((ctx->sizeLo >> 24) & 255);
-  padlen[5] = (unsigned char)((ctx->sizeLo >> 16) & 255);
-  padlen[6] = (unsigned char)((ctx->sizeLo >> 8) & 255);
-  padlen[7] = (unsigned char)((ctx->sizeLo >> 0) & 255);
-  moz_SHA1_Update(ctx, &pad0x80, 1);
-  while (ctx->lenW != 56)
-    moz_SHA1_Update(ctx, &pad0x00, 1);
-  moz_SHA1_Update(ctx, padlen, 8);
-
-  /* Output hash
-   */
-  for (i = 0; i < 20; i++) {
-    hashout[i] = (unsigned char)(ctx->H[i / 4] >> 24);
-    ctx->H[i / 4] <<= 8;
-  }
-
-  /*
-   *  Re-initialize the context (also zeroizes contents)
-   */
-  moz_SHA1_Init(ctx);
-}
-
-
-#define SHA_ROT(X,n) (((X) << (n)) | ((X) >> (32-(n))))
-
-static void shaHashBlock(moz_SHA_CTX *ctx) {
-  int t;
-  unsigned int A,B,C,D,E,TEMP;
-
-  for (t = 16; t <= 79; t++)
-    ctx->W[t] =
-      SHA_ROT(ctx->W[t-3] ^ ctx->W[t-8] ^ ctx->W[t-14] ^ ctx->W[t-16], 1);
-
-  A = ctx->H[0];
-  B = ctx->H[1];
-  C = ctx->H[2];
-  D = ctx->H[3];
-  E = ctx->H[4];
-
-  for (t = 0; t <= 19; t++) {
-    TEMP = SHA_ROT(A,5) + (((C^D)&B)^D)     + E + ctx->W[t] + 0x5a827999;
-    E = D; D = C; C = SHA_ROT(B, 30); B = A; A = TEMP;
-  }
-  for (t = 20; t <= 39; t++) {
-    TEMP = SHA_ROT(A,5) + (B^C^D)           + E + ctx->W[t] + 0x6ed9eba1;
-    E = D; D = C; C = SHA_ROT(B, 30); B = A; A = TEMP;
-  }
-  for (t = 40; t <= 59; t++) {
-    TEMP = SHA_ROT(A,5) + ((B&C)|(D&(B|C))) + E + ctx->W[t] + 0x8f1bbcdc;
-    E = D; D = C; C = SHA_ROT(B, 30); B = A; A = TEMP;
-  }
-  for (t = 60; t <= 79; t++) {
-    TEMP = SHA_ROT(A,5) + (B^C^D)           + E + ctx->W[t] + 0xca62c1d6;
-    E = D; D = C; C = SHA_ROT(B, 30); B = A; A = TEMP;
-  }
-
-  ctx->H[0] += A;
-  ctx->H[1] += B;
-  ctx->H[2] += C;
-  ctx->H[3] += D;
-  ctx->H[4] += E;
-}
diff --git a/mozilla-sha1/sha1.h b/mozilla-sha1/sha1.h
deleted file mode 100644
index aa48a46cf7..0000000000
--- a/mozilla-sha1/sha1.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is SHA 180-1 Header File
- *
- * The Initial Developer of the Original Code is Paul Kocher of
- * Cryptography Research.  Portions created by Paul Kocher are
- * Copyright (C) 1995-9 by Cryptography Research, Inc.  All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- *     Paul Kocher
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above.  If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL.  If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-
-typedef struct {
-  unsigned int H[5];
-  unsigned int W[80];
-  int lenW;
-  unsigned int sizeHi,sizeLo;
-} moz_SHA_CTX;
-
-void moz_SHA1_Init(moz_SHA_CTX *ctx);
-void moz_SHA1_Update(moz_SHA_CTX *ctx, const void *dataIn, int len);
-void moz_SHA1_Final(unsigned char hashout[20], moz_SHA_CTX *ctx);
-
-#define git_SHA_CTX	moz_SHA_CTX
-#define git_SHA1_Init	moz_SHA1_Init
-#define git_SHA1_Update	moz_SHA1_Update
-#define git_SHA1_Final	moz_SHA1_Final
diff --git a/object.c b/object.c
index a6ef439192..fe8eaaf19f 100644
--- a/object.c
+++ b/object.c
@@ -188,17 +188,18 @@ struct object *parse_object(const unsigned char *sha1)
 	unsigned long size;
 	enum object_type type;
 	int eaten;
-	void *buffer = read_sha1_file(sha1, &type, &size);
+	const unsigned char *repl;
+	void *buffer = read_sha1_file_repl(sha1, &type, &size, &repl);
 
 	if (buffer) {
 		struct object *obj;
-		if (check_sha1_signature(sha1, buffer, size, typename(type)) < 0) {
+		if (check_sha1_signature(repl, buffer, size, typename(type)) < 0) {
 			free(buffer);
-			error("sha1 mismatch %s\n", sha1_to_hex(sha1));
+			error("sha1 mismatch %s\n", sha1_to_hex(repl));
 			return NULL;
 		}
 
-		obj = parse_object_buffer(sha1, type, size, buffer, &eaten);
+		obj = parse_object_buffer(repl, type, size, buffer, &eaten);
 		if (!eaten)
 			free(buffer);
 		return obj;
diff --git a/parse-options.c b/parse-options.c
index 3b71fbb541..a64a4d6ee2 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -549,6 +549,14 @@ void usage_with_options(const char * const *usagestr,
 	exit(129);
 }
 
+void usage_msg_opt(const char *msg,
+		   const char * const *usagestr,
+		   const struct option *options)
+{
+	fprintf(stderr, "%s\n\n", msg);
+	usage_with_options(usagestr, options);
+}
+
 int parse_options_usage(const char * const *usagestr,
 			const struct option *opts)
 {
diff --git a/parse-options.h b/parse-options.h
index b32587ad7c..f295a2cf85 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -145,6 +145,10 @@ extern int parse_options(int argc, const char **argv, const char *prefix,
 extern NORETURN void usage_with_options(const char * const *usagestr,
                                         const struct option *options);
 
+extern NORETURN void usage_msg_opt(const char *msg,
+				   const char * const *usagestr,
+				   const struct option *options);
+
 /*----- incremental advanced APIs -----*/
 
 enum {
diff --git a/pretty.c b/pretty.c
index 3b2ecdd20e..f5983f8baa 100644
--- a/pretty.c
+++ b/pretty.c
@@ -583,7 +583,7 @@ static void format_decoration(struct strbuf *sb, const struct commit *commit)
 	struct name_decoration *d;
 	const char *prefix = " (";
 
-	load_ref_decorations();
+	load_ref_decorations(DECORATE_SHORT_REFS);
 	d = lookup_decoration(&name_decoration, &commit->object);
 	while (d) {
 		strbuf_addstr(sb, prefix);
diff --git a/refs.c b/refs.c
index dd9c9ba3f6..24865cf5a6 100644
--- a/refs.c
+++ b/refs.c
@@ -668,6 +668,11 @@ int for_each_remote_ref(each_ref_fn fn, void *cb_data)
 	return for_each_ref_in("refs/remotes/", fn, cb_data);
 }
 
+int for_each_replace_ref(each_ref_fn fn, void *cb_data)
+{
+	return do_for_each_ref("refs/replace/", fn, 13, 0, cb_data);
+}
+
 int for_each_rawref(each_ref_fn fn, void *cb_data)
 {
 	return do_for_each_ref("refs/", fn, 0,
diff --git a/refs.h b/refs.h
index c11f6a6d58..777b5b7ca6 100644
--- a/refs.h
+++ b/refs.h
@@ -24,6 +24,7 @@ extern int for_each_ref_in(const char *, each_ref_fn, void *);
 extern int for_each_tag_ref(each_ref_fn, void *);
 extern int for_each_branch_ref(each_ref_fn, void *);
 extern int for_each_remote_ref(each_ref_fn, void *);
+extern int for_each_replace_ref(each_ref_fn, void *);
 
 /* can be used to learn about broken ref and symref */
 extern int for_each_rawref(each_ref_fn, void *);
diff --git a/replace_object.c b/replace_object.c
new file mode 100644
index 0000000000..eb59604fd3
--- /dev/null
+++ b/replace_object.c
@@ -0,0 +1,114 @@
+#include "cache.h"
+#include "sha1-lookup.h"
+#include "refs.h"
+
+static struct replace_object {
+	unsigned char sha1[2][20];
+} **replace_object;
+
+static int replace_object_alloc, replace_object_nr;
+
+static const unsigned char *replace_sha1_access(size_t index, void *table)
+{
+	struct replace_object **replace = table;
+	return replace[index]->sha1[0];
+}
+
+static int replace_object_pos(const unsigned char *sha1)
+{
+	return sha1_pos(sha1, replace_object, replace_object_nr,
+			replace_sha1_access);
+}
+
+static int register_replace_object(struct replace_object *replace,
+				   int ignore_dups)
+{
+	int pos = replace_object_pos(replace->sha1[0]);
+
+	if (0 <= pos) {
+		if (ignore_dups)
+			free(replace);
+		else {
+			free(replace_object[pos]);
+			replace_object[pos] = replace;
+		}
+		return 1;
+	}
+	pos = -pos - 1;
+	if (replace_object_alloc <= ++replace_object_nr) {
+		replace_object_alloc = alloc_nr(replace_object_alloc);
+		replace_object = xrealloc(replace_object,
+					  sizeof(*replace_object) *
+					  replace_object_alloc);
+	}
+	if (pos < replace_object_nr)
+		memmove(replace_object + pos + 1,
+			replace_object + pos,
+			(replace_object_nr - pos - 1) *
+			sizeof(*replace_object));
+	replace_object[pos] = replace;
+	return 0;
+}
+
+static int register_replace_ref(const char *refname,
+				const unsigned char *sha1,
+				int flag, void *cb_data)
+{
+	/* Get sha1 from refname */
+	const char *slash = strrchr(refname, '/');
+	const char *hash = slash ? slash + 1 : refname;
+	struct replace_object *repl_obj = xmalloc(sizeof(*repl_obj));
+
+	if (strlen(hash) != 40 || get_sha1_hex(hash, repl_obj->sha1[0])) {
+		free(repl_obj);
+		warning("bad replace ref name: %s", refname);
+		return 0;
+	}
+
+	/* Copy sha1 from the read ref */
+	hashcpy(repl_obj->sha1[1], sha1);
+
+	/* Register new object */
+	if (register_replace_object(repl_obj, 1))
+		die("duplicate replace ref: %s", refname);
+
+	return 0;
+}
+
+static void prepare_replace_object(void)
+{
+	static int replace_object_prepared;
+
+	if (replace_object_prepared)
+		return;
+
+	for_each_replace_ref(register_replace_ref, NULL);
+	replace_object_prepared = 1;
+}
+
+/* We allow "recursive" replacement. Only within reason, though */
+#define MAXREPLACEDEPTH 5
+
+const unsigned char *lookup_replace_object(const unsigned char *sha1)
+{
+	int pos, depth = MAXREPLACEDEPTH;
+	const unsigned char *cur = sha1;
+
+	if (!read_replace_refs)
+		return sha1;
+
+	prepare_replace_object();
+
+	/* Try to recursively replace the object */
+	do {
+		if (--depth < 0)
+			die("replace depth too high for object %s",
+			    sha1_to_hex(sha1));
+
+		pos = replace_object_pos(cur);
+		if (0 <= pos)
+			cur = replace_object[pos]->sha1[1];
+	} while (0 <= pos);
+
+	return cur;
+}
diff --git a/revision.c b/revision.c
index 9f5dac5f1d..35eca4a361 100644
--- a/revision.c
+++ b/revision.c
@@ -1052,7 +1052,7 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 		revs->simplify_by_decoration = 1;
 		revs->limited = 1;
 		revs->prune = 1;
-		load_ref_decorations();
+		load_ref_decorations(DECORATE_SHORT_REFS);
 	} else if (!strcmp(arg, "--date-order")) {
 		revs->lifo = 0;
 		revs->topo_order = 1;
@@ -1664,7 +1664,7 @@ static inline int want_ancestry(struct rev_info *revs)
 	return (revs->rewrite_parents || revs->children.name);
 }
 
-enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
+enum commit_action get_commit_action(struct rev_info *revs, struct commit *commit)
 {
 	if (commit->object.flags & SHOWN)
 		return commit_ignore;
@@ -1692,12 +1692,23 @@ enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
 			if (!commit->parents || !commit->parents->next)
 				return commit_ignore;
 		}
-		if (want_ancestry(revs) && rewrite_parents(revs, commit) < 0)
-			return commit_error;
 	}
 	return commit_show;
 }
 
+enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit)
+{
+	enum commit_action action = get_commit_action(revs, commit);
+
+	if (action == commit_show &&
+	    !revs->show_all &&
+	    revs->prune && revs->dense && want_ancestry(revs)) {
+		if (rewrite_parents(revs, commit) < 0)
+			return commit_error;
+	}
+	return action;
+}
+
 static struct commit *get_revision_1(struct rev_info *revs)
 {
 	if (!revs->commits)
diff --git a/revision.h b/revision.h
index fb74492714..9d0dddbcbc 100644
--- a/revision.h
+++ b/revision.h
@@ -15,6 +15,9 @@
 #define SYMMETRIC_LEFT	(1u<<8)
 #define ALL_REV_FLAGS	((1u<<9)-1)
 
+#define DECORATE_SHORT_REFS	1
+#define DECORATE_FULL_REFS	2
+
 struct rev_info;
 struct log_info;
 
@@ -165,6 +168,7 @@ enum commit_action {
 	commit_error
 };
 
+extern enum commit_action get_commit_action(struct rev_info *revs, struct commit *commit);
 extern enum commit_action simplify_commit(struct rev_info *revs, struct commit *commit);
 
 #endif
diff --git a/sha1_file.c b/sha1_file.c
index 1d996a1990..4ea0b18d0a 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2144,13 +2144,26 @@ static void *read_object(const unsigned char *sha1, enum object_type *type,
 	return read_packed_sha1(sha1, type, size);
 }
 
-void *read_sha1_file(const unsigned char *sha1, enum object_type *type,
-		     unsigned long *size)
+void *read_sha1_file_repl(const unsigned char *sha1,
+			  enum object_type *type,
+			  unsigned long *size,
+			  const unsigned char **replacement)
 {
-	void *data = read_object(sha1, type, size);
+	const unsigned char *repl = lookup_replace_object(sha1);
+	void *data = read_object(repl, type, size);
+
+	/* die if we replaced an object with one that does not exist */
+	if (!data && repl != sha1)
+		die("replacement %s not found for %s",
+		    sha1_to_hex(repl), sha1_to_hex(sha1));
+
 	/* legacy behavior is to die on corrupted objects */
-	if (!data && (has_loose_object(sha1) || has_packed_and_bad(sha1)))
-		die("object %s is corrupted", sha1_to_hex(sha1));
+	if (!data && (has_loose_object(repl) || has_packed_and_bad(repl)))
+		die("object %s is corrupted", sha1_to_hex(repl));
+
+	if (replacement)
+		*replacement = repl;
+
 	return data;
 }
 
diff --git a/strbuf.c b/strbuf.c
index f03d11702b..a6153dca27 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -322,7 +322,7 @@ int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
 	return -1;
 }
 
-int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
+int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
 {
 	int ch;
 
@@ -332,10 +332,10 @@ int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
 
 	strbuf_reset(sb);
 	while ((ch = fgetc(fp)) != EOF) {
-		if (ch == term)
-			break;
 		strbuf_grow(sb, 1);
 		sb->buf[sb->len++] = ch;
+		if (ch == term)
+			break;
 	}
 	if (ch == EOF && sb->len == 0)
 		return EOF;
@@ -344,6 +344,15 @@ int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
 	return 0;
 }
 
+int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
+{
+	if (strbuf_getwholeline(sb, fp, term))
+		return EOF;
+	if (sb->buf[sb->len-1] == term)
+		strbuf_setlen(sb, sb->len-1);
+	return 0;
+}
+
 int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
 {
 	int fd, len;
diff --git a/strbuf.h b/strbuf.h
index eaa8704d5f..d05e056dd3 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -126,6 +126,7 @@ extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
 extern int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
 extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint);
 
+extern int strbuf_getwholeline(struct strbuf *, FILE *, int);
 extern int strbuf_getline(struct strbuf *, FILE *, int);
 
 extern void stripspace(struct strbuf *buf, int skip_comments);
diff --git a/t/t1009-read-tree-new-index.sh b/t/t1009-read-tree-new-index.sh
new file mode 100755
index 0000000000..59b3aa4bc4
--- /dev/null
+++ b/t/t1009-read-tree-new-index.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+test_description='test read-tree into a fresh index file'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	echo one >a &&
+	git add a &&
+	git commit -m initial
+'
+
+test_expect_success 'non-existent index file' '
+	rm -f new-index &&
+	GIT_INDEX_FILE=new-index git read-tree master
+'
+
+test_expect_success 'empty index file' '
+	rm -f new-index &&
+	> new-index &&
+	GIT_INDEX_FILE=new-index git read-tree master
+'
+
+test_done
+
diff --git a/t/t2000-checkout-cache-clash.sh b/t/t2000-checkout-cache-clash.sh
index f7e1a735ec..de3edb5d57 100755
--- a/t/t2000-checkout-cache-clash.sh
+++ b/t/t2000-checkout-cache-clash.sh
@@ -48,4 +48,13 @@ test_expect_success \
     'git checkout-index conflicting paths.' \
     'test -f path0 && test -d path1 && test -f path1/file1'
 
+test_expect_success SYMLINKS 'checkout-index -f twice with --prefix' '
+	mkdir -p tar/get &&
+	ln -s tar/get there &&
+	echo first &&
+	git checkout-index -a -f --prefix=there/ &&
+	echo second &&
+	git checkout-index -a -f --prefix=there/
+'
+
 test_done
diff --git a/t/t2015-checkout-unborn.sh b/t/t2015-checkout-unborn.sh
new file mode 100755
index 0000000000..c551d39a66
--- /dev/null
+++ b/t/t2015-checkout-unborn.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+test_description='checkout from unborn branch protects contents'
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+	mkdir parent &&
+	(cd parent &&
+	 git init &&
+	 echo content >file &&
+	 git add file &&
+	 git commit -m base
+	) &&
+	git fetch parent master:origin
+'
+
+test_expect_success 'checkout from unborn preserves untracked files' '
+	echo precious >expect &&
+	echo precious >file &&
+	test_must_fail git checkout -b new origin &&
+	test_cmp expect file
+'
+
+test_expect_success 'checkout from unborn preserves index contents' '
+	echo precious >expect &&
+	echo precious >file &&
+	git add file &&
+	test_must_fail git checkout -b new origin &&
+	test_cmp expect file &&
+	git show :file >file &&
+	test_cmp expect file
+'
+
+test_expect_success 'checkout from unborn merges identical index contents' '
+	echo content >file &&
+	git add file &&
+	git checkout -b new origin
+'
+
+test_done
diff --git a/t/t3400-rebase.sh b/t/t3400-rebase.sh
index c5c29ccc4f..4e6a44b623 100755
--- a/t/t3400-rebase.sh
+++ b/t/t3400-rebase.sh
@@ -3,9 +3,10 @@
 # Copyright (c) 2005 Amos Waterland
 #
 
-test_description='git rebase should not destroy author information
+test_description='git rebase assorted tests
 
-This test runs git rebase and checks that the author information is not lost.
+This test runs git rebase and checks that the author information is not lost
+among other things.
 '
 . ./test-lib.sh
 
@@ -133,4 +134,25 @@ test_expect_success 'rebase -q is quiet' '
      test ! -s output.out
 '
 
+q_to_cr () {
+	tr Q '\015'
+}
+
+test_expect_success 'Rebase a commit that sprinkles CRs in' '
+	(
+		echo "One"
+		echo "TwoQ"
+		echo "Three"
+		echo "FQur"
+		echo "Five"
+	) | q_to_cr >CR &&
+	git add CR &&
+	test_tick &&
+	git commit -a -m "A file with a line with CR" &&
+	git tag file-with-cr &&
+	git checkout HEAD^0 &&
+	git rebase --onto HEAD^^ HEAD^ &&
+	git diff --exit-code file-with-cr:CR HEAD:CR
+'
+
 test_done
diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
index 8b33321f8c..8e3694ed5b 100755
--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -207,6 +207,7 @@ log --root --cc --patch-with-stat --summary master
 log -SF master
 log -SF -p master
 log --decorate --all
+log --decorate=full --all
 
 rev-list --parents HEAD
 rev-list --children HEAD
diff --git a/t/t4013/diff.log_--decorate=full_--all b/t/t4013/diff.log_--decorate=full_--all
new file mode 100644
index 0000000000..903d9d9659
--- /dev/null
+++ b/t/t4013/diff.log_--decorate=full_--all
@@ -0,0 +1,34 @@
+$ git log --decorate=full --all
+commit 59d314ad6f356dd08601a4cd5e530381da3e3c64 (refs/heads/master)
+Merge: 9a6d494 c7a2ab9
+Author: A U Thor <author@example.com>
+Date:   Mon Jun 26 00:04:00 2006 +0000
+
+    Merge branch 'side'
+
+commit c7a2ab9e8eac7b117442a607d5a9b3950ae34d5a (refs/heads/side)
+Author: A U Thor <author@example.com>
+Date:   Mon Jun 26 00:03:00 2006 +0000
+
+    Side
+
+commit 9a6d4949b6b76956d9d5e26f2791ec2ceff5fdc0
+Author: A U Thor <author@example.com>
+Date:   Mon Jun 26 00:02:00 2006 +0000
+
+    Third
+
+commit 1bde4ae5f36c8d9abe3a0fce0c6aab3c4a12fe44
+Author: A U Thor <author@example.com>
+Date:   Mon Jun 26 00:01:00 2006 +0000
+
+    Second
+    
+    This is the second commit.
+
+commit 444ac553ac7612cc88969031b02b3767fb8a353a (refs/heads/initial)
+Author: A U Thor <author@example.com>
+Date:   Mon Jun 26 00:00:00 2006 +0000
+
+    Initial
+$
diff --git a/t/t4039-diff-assume-unchanged.sh b/t/t4039-diff-assume-unchanged.sh
new file mode 100755
index 0000000000..9d9498bd95
--- /dev/null
+++ b/t/t4039-diff-assume-unchanged.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+test_description='diff with assume-unchanged entries'
+
+. ./test-lib.sh
+
+# external diff has been tested in t4020-diff-external.sh
+
+test_expect_success 'setup' '
+	echo zero > zero &&
+	git add zero &&
+	git commit -m zero &&
+	echo one > one &&
+	echo two > two &&
+	git add one two &&
+	git commit -m onetwo &&
+	git update-index --assume-unchanged one &&
+	echo borked >> one &&
+	test "$(git ls-files -v one)" = "h one"
+'
+
+test_expect_success 'diff-index does not examine assume-unchanged entries' '
+	git diff-index HEAD^ -- one | grep -q 5626abf0f72e58d7a153368ba57db4c673c0e171
+'
+
+test_expect_success 'diff-files does not examine assume-unchanged entries' '
+	rm one &&
+	test -z "$(git diff-files -- one)"
+'
+
+test_done
diff --git a/t/t4107-apply-ignore-whitespace.sh b/t/t4107-apply-ignore-whitespace.sh
new file mode 100755
index 0000000000..484654d6e4
--- /dev/null
+++ b/t/t4107-apply-ignore-whitespace.sh
@@ -0,0 +1,185 @@
+#!/bin/sh
+#
+# Copyright (c) 2009 Giuseppe Bilotta
+#
+
+test_description='git-apply --ignore-whitespace.
+
+'
+. ./test-lib.sh
+
+# This primes main.c file that indents without using HT at all.
+# Various patches with HT and other spaces are attempted in the test.
+
+cat > patch1.patch <<\EOF
+diff --git a/main.c b/main.c
+new file mode 100644
+--- /dev/null
++++ b/main.c
+@@ -0,0 +1,22 @@
++#include <stdio.h>
++
++void print_int(int num);
++int func(int num);
++
++int main() {
++       int i;
++
++       for (i = 0; i < 10; i++) {
++               print_int(func(i)); /* stuff */
++       }
++
++       return 0;
++}
++
++int func(int num) {
++       return num * num;
++}
++
++void print_int(int num) {
++       printf("%d", num);
++}
+EOF
+
+# Since whitespace is very significant and we want to prevent whitespace
+# mangling when creating this test from a patch, we protect 'fixable'
+# whitespace by replacing spaces with Z and replacing them at patch
+# creation time, hence the sed trick.
+
+# This patch will fail unless whitespace differences are being ignored
+
+sed -e 's/Z/ /g' > patch2.patch <<\EOF
+diff --git a/main.c b/main.c
+--- a/main.c
++++ b/main.c
+@@ -10,6 +10,8 @@
+Z		print_int(func(i)); /* stuff */
+Z	}
+Z
++	printf("\n");
++
+Z	return 0;
+Z}
+Z
+EOF
+
+# This patch will fail even if whitespace differences are being ignored,
+# because of the missing string at EOL. TODO: this testcase should be
+# improved by creating a line that has the same hash with and without
+# the final string.
+
+sed -e 's/Z/ /g' > patch3.patch <<\EOF
+diff --git a/main.c b/main.c
+--- a/main.c
++++ b/main.c
+@@ -10,3 +10,4 @@
+Z	for (i = 0; i < 10; i++) {
+Z		print_int(func(i));Z
++		/* stuff */
+Z	}
+EOF
+
+# This patch will fail even if whitespace differences are being ignored,
+# because of the missing EOL at EOF.
+
+sed -e 's/Z/ /g' > patch4.patch <<\EOF
+diff --git a/main.c b/main.c
+--- a/main.c
++++ b/main.c
+@@ -21,1 +21,1 @@
+-	};Z
+\ No newline at end of file
++	};
+EOF
+
+# This patch will fail unless whitespace differences are being ignored.
+
+sed -e 's/Z/ /g' > patch5.patch <<\EOF
+diff --git a/main.c b/main.c
+--- a/main.c
++++ b/main.c
+@@ -2,2 +2,3 @@
+Z	void print_int(int num);
++	/* a comment */
+Z	int func(int num);
+EOF
+
+# And this is how the final output should be.  Patches introduce
+# HTs but the original SP indents are mostly kept.
+
+sed -e 's/T/	/g' > main.c.final <<\EOF
+#include <stdio.h>
+
+void print_int(int num);
+T/* a comment */
+int func(int num);
+
+int main() {
+       int i;
+
+       for (i = 0; i < 10; i++) {
+               print_int(func(i)); /* stuff */
+       }
+
+Tprintf("\n");
+
+       return 0;
+}
+
+int func(int num) {
+       return num * num;
+}
+
+void print_int(int num) {
+       printf("%d", num);
+}
+EOF
+
+test_expect_success 'file creation' '
+	git-apply patch1.patch
+'
+
+test_expect_success 'patch2 fails (retab)' '
+	test_must_fail git-apply patch2.patch
+'
+
+test_expect_success 'patch2 applies with --ignore-whitespace' '
+	git-apply --ignore-whitespace patch2.patch
+'
+
+test_expect_success 'patch2 reverse applies with --ignore-space-change' '
+	git-apply -R --ignore-space-change patch2.patch
+'
+
+git config apply.ignorewhitespace change
+
+test_expect_success 'patch2 applies (apply.ignorewhitespace = change)' '
+	git-apply patch2.patch
+'
+
+test_expect_success 'patch3 fails (missing string at EOL)' '
+	test_must_fail git-apply patch3.patch
+'
+
+test_expect_success 'patch4 fails (missing EOL at EOF)' '
+	test_must_fail git-apply patch4.patch
+'
+
+test_expect_success 'patch5 applies (leading whitespace)' '
+	git-apply patch5.patch
+'
+
+test_expect_success 'patches do not mangle whitespace' '
+	test_cmp main.c main.c.final
+'
+
+test_expect_success 're-create file (with --ignore-whitespace)' '
+	rm -f main.c &&
+	git-apply patch1.patch
+'
+
+test_expect_success 'patch5 fails (--no-ignore-whitespace)' '
+	test_must_fail git-apply --no-ignore-whitespace patch5.patch
+'
+
+test_done
diff --git a/t/t5500-fetch-pack.sh b/t/t5500-fetch-pack.sh
index a8c2ca2a78..18376d6608 100755
--- a/t/t5500-fetch-pack.sh
+++ b/t/t5500-fetch-pack.sh
@@ -139,6 +139,36 @@ test_expect_success 'fsck in shallow repo' '
 	)
 '
 
+test_expect_success 'simple fetch in shallow repo' '
+	(
+		cd shallow &&
+		git fetch
+	)
+'
+
+test_expect_success 'no changes expected' '
+	(
+		cd shallow &&
+		git count-objects -v
+	) > count.shallow.2 &&
+	cmp count.shallow count.shallow.2
+'
+
+test_expect_success 'fetch same depth in shallow repo' '
+	(
+		cd shallow &&
+		git fetch --depth=2
+	)
+'
+
+test_expect_success 'no changes expected' '
+	(
+		cd shallow &&
+		git count-objects -v
+	) > count.shallow.3 &&
+	cmp count.shallow count.shallow.3
+'
+
 test_expect_success 'add two more' '
 	add B66 $B65 &&
 	add B67 $B66
@@ -201,4 +231,21 @@ test_expect_success 'pull in shallow repo with missing merge base' '
 	)
 '
 
+test_expect_success 'additional simple shallow deepenings' '
+	(
+		cd shallow &&
+		git fetch --depth=8 &&
+		git fetch --depth=10 &&
+		git fetch --depth=11
+	)
+'
+
+test_expect_success 'clone shallow object count' '
+	(
+		cd shallow &&
+		git count-objects -v
+	) > count.shallow &&
+	grep "^count: 52" count.shallow
+'
+
 test_done
diff --git a/t/t5531-deep-submodule-push.sh b/t/t5531-deep-submodule-push.sh
new file mode 100644
index 0000000000..65d8d474bc
--- /dev/null
+++ b/t/t5531-deep-submodule-push.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+test_description='unpack-objects'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	mkdir pub.git &&
+	GIT_DIR=pub.git git init --bare
+	GIT_DIR=pub.git git config receive.fsckobjects true &&
+	mkdir work &&
+	(
+		cd work &&
+		git init &&
+		mkdir -p gar/bage &&
+		(
+			cd gar/bage &&
+			git init &&
+			>junk &&
+			git add junk &&
+			git commit -m "Initial junk"
+		) &&
+		git add gar/bage &&
+		git commit -m "Initial superproject"
+	)
+'
+
+test_expect_success push '
+	(
+		cd work &&
+		git push ../pub.git master
+	)
+'
+
+test_done
diff --git a/t/t6015-rev-list-show-all-parents.sh b/t/t6015-rev-list-show-all-parents.sh
new file mode 100755
index 0000000000..8b146fb432
--- /dev/null
+++ b/t/t6015-rev-list-show-all-parents.sh
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+test_description='--show-all --parents does not rewrite TREESAME commits'
+
+. ./test-lib.sh
+
+test_expect_success 'set up --show-all --parents test' '
+	test_commit one foo.txt &&
+	commit1=`git rev-list -1 HEAD` &&
+	test_commit two bar.txt &&
+	commit2=`git rev-list -1 HEAD` &&
+	test_commit three foo.txt &&
+	commit3=`git rev-list -1 HEAD`
+	'
+
+test_expect_success '--parents rewrites TREESAME parents correctly' '
+	echo $commit3 $commit1 > expected &&
+	echo $commit1 >> expected &&
+	git rev-list --parents HEAD -- foo.txt > actual &&
+	test_cmp expected actual
+	'
+
+test_expect_success '--parents --show-all does not rewrites TREESAME parents' '
+	echo $commit3 $commit2 > expected &&
+	echo $commit2 $commit1 >> expected &&
+	echo $commit1 >> expected &&
+	git rev-list --parents --show-all HEAD -- foo.txt > actual &&
+	test_cmp expected actual
+	'
+
+test_done
diff --git a/t/t6016-rev-list-graph-simplify-history.sh b/t/t6016-rev-list-graph-simplify-history.sh
new file mode 100755
index 0000000000..27fd52b7be
--- /dev/null
+++ b/t/t6016-rev-list-graph-simplify-history.sh
@@ -0,0 +1,276 @@
+#!/bin/sh
+
+# There's more than one "correct" way to represent the history graphically.
+# These tests depend on the current behavior of the graphing code.  If the
+# graphing code is ever changed to draw the output differently, these tests
+# cases will need to be updated to know about the new layout.
+
+test_description='--graph and simplified history'
+
+. ./test-lib.sh
+
+test_expect_success 'set up rev-list --graph test' '
+	# 3 commits on branch A
+	test_commit A1 foo.txt &&
+	test_commit A2 bar.txt &&
+	test_commit A3 bar.txt &&
+	git branch -m master A &&
+
+	# 2 commits on branch B, started from A1
+	git checkout -b B A1 &&
+	test_commit B1 foo.txt &&
+	test_commit B2 abc.txt &&
+
+	# 2 commits on branch C, started from A2
+	git checkout -b C A2 &&
+	test_commit C1 xyz.txt &&
+	test_commit C2 xyz.txt &&
+
+	# Octopus merge B and C into branch A
+	git checkout A &&
+	git merge B C &&
+	git tag A4
+
+	test_commit A5 bar.txt &&
+
+	# More commits on C, then merge C into A
+	git checkout C &&
+	test_commit C3 foo.txt &&
+	test_commit C4 bar.txt &&
+	git checkout A &&
+	git merge -s ours C &&
+	git tag A6
+
+	test_commit A7 bar.txt &&
+
+	# Store commit names in variables for later use
+	A1=$(git rev-parse --verify A1) &&
+	A2=$(git rev-parse --verify A2) &&
+	A3=$(git rev-parse --verify A3) &&
+	A4=$(git rev-parse --verify A4) &&
+	A5=$(git rev-parse --verify A5) &&
+	A6=$(git rev-parse --verify A6) &&
+	A7=$(git rev-parse --verify A7) &&
+	B1=$(git rev-parse --verify B1) &&
+	B2=$(git rev-parse --verify B2) &&
+	C1=$(git rev-parse --verify C1) &&
+	C2=$(git rev-parse --verify C2) &&
+	C3=$(git rev-parse --verify C3) &&
+	C4=$(git rev-parse --verify C4)
+	'
+
+test_expect_success '--graph --all' '
+	rm -f expected &&
+	echo "* $A7" >> expected &&
+	echo "*   $A6" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "| * $C3" >> expected &&
+	echo "* | $A5" >> expected &&
+	echo "| |     " >> expected &&
+	echo "|  \\    " >> expected &&
+	echo "*-. \\   $A4" >> expected &&
+	echo "|\\ \\ \\  " >> expected &&
+	echo "| | |/  " >> expected &&
+	echo "| | * $C2" >> expected &&
+	echo "| | * $C1" >> expected &&
+	echo "| * | $B2" >> expected &&
+	echo "| * | $B1" >> expected &&
+	echo "* | | $A3" >> expected &&
+	echo "| |/  " >> expected &&
+	echo "|/|   " >> expected &&
+	echo "* | $A2" >> expected &&
+	echo "|/  " >> expected &&
+	echo "* $A1" >> expected &&
+	git rev-list --graph --all > actual &&
+	test_cmp expected actual
+	'
+
+# Make sure the graph_is_interesting() code still realizes
+# that undecorated merges are interesting, even with --simplify-by-decoration
+test_expect_success '--graph --simplify-by-decoration' '
+	rm -f expected &&
+	git tag -d A4
+	echo "* $A7" >> expected &&
+	echo "*   $A6" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "| * $C3" >> expected &&
+	echo "* | $A5" >> expected &&
+	echo "| |     " >> expected &&
+	echo "|  \\    " >> expected &&
+	echo "*-. \\   $A4" >> expected &&
+	echo "|\\ \\ \\  " >> expected &&
+	echo "| | |/  " >> expected &&
+	echo "| | * $C2" >> expected &&
+	echo "| | * $C1" >> expected &&
+	echo "| * | $B2" >> expected &&
+	echo "| * | $B1" >> expected &&
+	echo "* | | $A3" >> expected &&
+	echo "| |/  " >> expected &&
+	echo "|/|   " >> expected &&
+	echo "* | $A2" >> expected &&
+	echo "|/  " >> expected &&
+	echo "* $A1" >> expected &&
+	git rev-list --graph --all --simplify-by-decoration > actual &&
+	test_cmp expected actual
+	'
+
+# Get rid of all decorations on branch B, and graph with it simplified away
+test_expect_success '--graph --simplify-by-decoration prune branch B' '
+	rm -f expected &&
+	git tag -d B2
+	git tag -d B1
+	git branch -d B
+	echo "* $A7" >> expected &&
+	echo "*   $A6" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "| * $C3" >> expected &&
+	echo "* | $A5" >> expected &&
+	echo "* |   $A4" >> expected &&
+	echo "|\\ \\  " >> expected &&
+	echo "| |/  " >> expected &&
+	echo "| * $C2" >> expected &&
+	echo "| * $C1" >> expected &&
+	echo "* | $A3" >> expected &&
+	echo "|/  " >> expected &&
+	echo "* $A2" >> expected &&
+	echo "* $A1" >> expected &&
+	git rev-list --graph --simplify-by-decoration --all > actual &&
+	test_cmp expected actual
+	'
+
+test_expect_success '--graph --full-history -- bar.txt' '
+	rm -f expected &&
+	git tag -d B2
+	git tag -d B1
+	git branch -d B
+	echo "* $A7" >> expected &&
+	echo "*   $A6" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "* | $A5" >> expected &&
+	echo "* |   $A4" >> expected &&
+	echo "|\\ \\  " >> expected &&
+	echo "| |/  " >> expected &&
+	echo "* | $A3" >> expected &&
+	echo "|/  " >> expected &&
+	echo "* $A2" >> expected &&
+	git rev-list --graph --full-history --all -- bar.txt > actual &&
+	test_cmp expected actual
+	'
+
+test_expect_success '--graph --full-history --simplify-merges -- bar.txt' '
+	rm -f expected &&
+	git tag -d B2
+	git tag -d B1
+	git branch -d B
+	echo "* $A7" >> expected &&
+	echo "*   $A6" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "* | $A5" >> expected &&
+	echo "* | $A3" >> expected &&
+	echo "|/  " >> expected &&
+	echo "* $A2" >> expected &&
+	git rev-list --graph --full-history --simplify-merges --all \
+		-- bar.txt > actual &&
+	test_cmp expected actual
+	'
+
+test_expect_success '--graph -- bar.txt' '
+	rm -f expected &&
+	git tag -d B2
+	git tag -d B1
+	git branch -d B
+	echo "* $A7" >> expected &&
+	echo "* $A5" >> expected &&
+	echo "* $A3" >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "|/  " >> expected &&
+	echo "* $A2" >> expected &&
+	git rev-list --graph --all -- bar.txt > actual &&
+	test_cmp expected actual
+	'
+
+test_expect_success '--graph --sparse -- bar.txt' '
+	rm -f expected &&
+	git tag -d B2
+	git tag -d B1
+	git branch -d B
+	echo "* $A7" >> expected &&
+	echo "* $A6" >> expected &&
+	echo "* $A5" >> expected &&
+	echo "* $A4" >> expected &&
+	echo "* $A3" >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "| * $C3" >> expected &&
+	echo "| * $C2" >> expected &&
+	echo "| * $C1" >> expected &&
+	echo "|/  " >> expected &&
+	echo "* $A2" >> expected &&
+	echo "* $A1" >> expected &&
+	git rev-list --graph --sparse --all -- bar.txt > actual &&
+	test_cmp expected actual
+	'
+
+test_expect_success '--graph ^C4' '
+	rm -f expected &&
+	echo "* $A7" >> expected &&
+	echo "* $A6" >> expected &&
+	echo "* $A5" >> expected &&
+	echo "*   $A4" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $B2" >> expected &&
+	echo "| * $B1" >> expected &&
+	echo "* $A3" >> expected &&
+	git rev-list --graph --all ^C4 > actual &&
+	test_cmp expected actual
+	'
+
+test_expect_success '--graph ^C3' '
+	rm -f expected &&
+	echo "* $A7" >> expected &&
+	echo "*   $A6" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "* $A5" >> expected &&
+	echo "*   $A4" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $B2" >> expected &&
+	echo "| * $B1" >> expected &&
+	echo "* $A3" >> expected &&
+	git rev-list --graph --all ^C3 > actual &&
+	test_cmp expected actual
+	'
+
+# I don't think the ordering of the boundary commits is really
+# that important, but this test depends on it.  If the ordering ever changes
+# in the code, we'll need to update this test.
+test_expect_success '--graph --boundary ^C3' '
+	rm -f expected &&
+	echo "* $A7" >> expected &&
+	echo "*   $A6" >> expected &&
+	echo "|\\  " >> expected &&
+	echo "| * $C4" >> expected &&
+	echo "* | $A5" >> expected &&
+	echo "| |     " >> expected &&
+	echo "|  \\    " >> expected &&
+	echo "*-. \\   $A4" >> expected &&
+	echo "|\\ \\ \\  " >> expected &&
+	echo "| * | | $B2" >> expected &&
+	echo "| * | | $B1" >> expected &&
+	echo "* | | | $A3" >> expected &&
+	echo "o | | | $A2" >> expected &&
+	echo "|/ / /  " >> expected &&
+	echo "o | | $A1" >> expected &&
+	echo " / /  " >> expected &&
+	echo "| o $C3" >> expected &&
+	echo "|/  " >> expected &&
+	echo "o $C2" >> expected &&
+	git rev-list --graph --boundary --all ^C3 > actual &&
+	test_cmp expected actual
+	'
+
+test_done
diff --git a/t/t6030-bisect-porcelain.sh b/t/t6030-bisect-porcelain.sh
index 1315bab595..def397c53a 100755
--- a/t/t6030-bisect-porcelain.sh
+++ b/t/t6030-bisect-porcelain.sh
@@ -175,7 +175,7 @@ test_expect_success 'bisect skip: successfull result' '
 	git bisect start $HASH4 $HASH1 &&
 	git bisect skip &&
 	git bisect bad > my_bisect_log.txt &&
-	grep "$HASH2 is first bad commit" my_bisect_log.txt &&
+	grep "$HASH2 is the first bad commit" my_bisect_log.txt &&
 	git bisect reset
 '
 
@@ -261,7 +261,7 @@ test_expect_success \
      git bisect good $HASH1 &&
      git bisect bad $HASH4 &&
      git bisect run ./test_script.sh > my_bisect_log.txt &&
-     grep "$HASH3 is first bad commit" my_bisect_log.txt &&
+     grep "$HASH3 is the first bad commit" my_bisect_log.txt &&
      git bisect reset'
 
 # We want to automatically find the commit that
@@ -274,7 +274,7 @@ test_expect_success \
      chmod +x test_script.sh &&
      git bisect start $HASH4 $HASH1 &&
      git bisect run ./test_script.sh > my_bisect_log.txt &&
-     grep "$HASH4 is first bad commit" my_bisect_log.txt &&
+     grep "$HASH4 is the first bad commit" my_bisect_log.txt &&
      git bisect reset'
 
 # $HASH1 is good, $HASH5 is bad, we skip $HASH3
@@ -287,14 +287,14 @@ test_expect_success 'bisect skip: add line and then a new test' '
 	git bisect start $HASH5 $HASH1 &&
 	git bisect skip &&
 	git bisect good > my_bisect_log.txt &&
-	grep "$HASH5 is first bad commit" my_bisect_log.txt &&
+	grep "$HASH5 is the first bad commit" my_bisect_log.txt &&
 	git bisect log > log_to_replay.txt &&
 	git bisect reset
 '
 
 test_expect_success 'bisect skip and bisect replay' '
 	git bisect replay log_to_replay.txt > my_bisect_log.txt &&
-	grep "$HASH5 is first bad commit" my_bisect_log.txt &&
+	grep "$HASH5 is the first bad commit" my_bisect_log.txt &&
 	git bisect reset
 '
 
@@ -335,7 +335,7 @@ test_expect_success 'bisect run & skip: find first bad' '
 	chmod +x test_script.sh &&
 	git bisect start $HASH7 $HASH1 &&
 	git bisect run ./test_script.sh > my_bisect_log.txt &&
-	grep "$HASH6 is first bad commit" my_bisect_log.txt
+	grep "$HASH6 is the first bad commit" my_bisect_log.txt
 '
 
 test_expect_success 'bisect skip only one range' '
@@ -385,7 +385,7 @@ test_expect_success 'bisect does not create a "bisect" branch' '
 	rev_hash6=$(git rev-parse --verify HEAD) &&
 	test "$rev_hash6" = "$HASH6" &&
 	git bisect good > my_bisect_log.txt &&
-	grep "$HASH7 is first bad commit" my_bisect_log.txt &&
+	grep "$HASH7 is the first bad commit" my_bisect_log.txt &&
 	git bisect reset &&
 	rev_hash6=$(git rev-parse --verify bisect) &&
 	test "$rev_hash6" = "$HASH6" &&
@@ -534,7 +534,7 @@ test_expect_success 'restricting bisection on one dir' '
 	para1=$(git rev-parse --verify HEAD) &&
 	test "$para1" = "$PARA_HASH1" &&
 	git bisect bad > my_bisect_log.txt &&
-	grep "$PARA_HASH1 is first bad commit" my_bisect_log.txt
+	grep "$PARA_HASH1 is the first bad commit" my_bisect_log.txt
 '
 
 test_expect_success 'restricting bisection on one dir and a file' '
@@ -552,7 +552,7 @@ test_expect_success 'restricting bisection on one dir and a file' '
 	para1=$(git rev-parse --verify HEAD) &&
 	test "$para1" = "$PARA_HASH1" &&
 	git bisect good > my_bisect_log.txt &&
-	grep "$PARA_HASH4 is first bad commit" my_bisect_log.txt
+	grep "$PARA_HASH4 is the first bad commit" my_bisect_log.txt
 '
 
 test_expect_success 'skipping away from skipped commit' '
diff --git a/t/t6050-replace.sh b/t/t6050-replace.sh
new file mode 100755
index 0000000000..8b8bd81c09
--- /dev/null
+++ b/t/t6050-replace.sh
@@ -0,0 +1,200 @@
+#!/bin/sh
+#
+# Copyright (c) 2008 Christian Couder
+#
+test_description='Tests replace refs functionality'
+
+exec </dev/null
+
+. ./test-lib.sh
+
+add_and_commit_file()
+{
+    _file="$1"
+    _msg="$2"
+
+    git add $_file || return $?
+    test_tick || return $?
+    git commit --quiet -m "$_file: $_msg"
+}
+
+HASH1=
+HASH2=
+HASH3=
+HASH4=
+HASH5=
+HASH6=
+HASH7=
+
+test_expect_success 'set up buggy branch' '
+     echo "line 1" >> hello &&
+     echo "line 2" >> hello &&
+     echo "line 3" >> hello &&
+     echo "line 4" >> hello &&
+     add_and_commit_file hello "4 lines" &&
+     HASH1=$(git rev-parse --verify HEAD) &&
+     echo "line BUG" >> hello &&
+     echo "line 6" >> hello &&
+     echo "line 7" >> hello &&
+     echo "line 8" >> hello &&
+     add_and_commit_file hello "4 more lines with a BUG" &&
+     HASH2=$(git rev-parse --verify HEAD) &&
+     echo "line 9" >> hello &&
+     echo "line 10" >> hello &&
+     add_and_commit_file hello "2 more lines" &&
+     HASH3=$(git rev-parse --verify HEAD) &&
+     echo "line 11" >> hello &&
+     add_and_commit_file hello "1 more line" &&
+     HASH4=$(git rev-parse --verify HEAD) &&
+     sed -e "s/BUG/5/" hello > hello.new &&
+     mv hello.new hello &&
+     add_and_commit_file hello "BUG fixed" &&
+     HASH5=$(git rev-parse --verify HEAD) &&
+     echo "line 12" >> hello &&
+     echo "line 13" >> hello &&
+     add_and_commit_file hello "2 more lines" &&
+     HASH6=$(git rev-parse --verify HEAD)
+     echo "line 14" >> hello &&
+     echo "line 15" >> hello &&
+     echo "line 16" >> hello &&
+     add_and_commit_file hello "again 3 more lines" &&
+     HASH7=$(git rev-parse --verify HEAD)
+'
+
+test_expect_success 'replace the author' '
+     git cat-file commit $HASH2 | grep "author A U Thor" &&
+     R=$(git cat-file commit $HASH2 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
+     git cat-file commit $R | grep "author O Thor" &&
+     git update-ref refs/replace/$HASH2 $R &&
+     git show HEAD~5 | grep "O Thor" &&
+     git show $HASH2 | grep "O Thor"
+'
+
+cat >tag.sig <<EOF
+object $HASH2
+type commit
+tag mytag
+tagger T A Gger <> 0 +0000
+
+EOF
+
+test_expect_success 'tag replaced commit' '
+     git mktag <tag.sig >.git/refs/tags/mytag 2>message
+'
+
+test_expect_success '"git fsck" works' '
+     git fsck master > fsck_master.out &&
+     grep "dangling commit $R" fsck_master.out &&
+     grep "dangling tag $(cat .git/refs/tags/mytag)" fsck_master.out &&
+     test -z "$(git fsck)"
+'
+
+test_expect_success 'repack, clone and fetch work' '
+     git repack -a -d &&
+     git clone --no-hardlinks . clone_dir &&
+     cd clone_dir &&
+     git show HEAD~5 | grep "A U Thor" &&
+     git show $HASH2 | grep "A U Thor" &&
+     git cat-file commit $R &&
+     git repack -a -d &&
+     test_must_fail git cat-file commit $R &&
+     git fetch ../ "refs/replace/*:refs/replace/*" &&
+     git show HEAD~5 | grep "O Thor" &&
+     git show $HASH2 | grep "O Thor" &&
+     git cat-file commit $R &&
+     cd ..
+'
+
+test_expect_success '"git replace" listing and deleting' '
+     test "$HASH2" = "$(git replace -l)" &&
+     test "$HASH2" = "$(git replace)" &&
+     aa=${HASH2%??????????????????????????????????????} &&
+     test "$HASH2" = "$(git replace -l "$aa*")" &&
+     test_must_fail git replace -d $R &&
+     test_must_fail git replace -d &&
+     test_must_fail git replace -l -d $HASH2 &&
+     git replace -d $HASH2 &&
+     git show $HASH2 | grep "A U Thor" &&
+     test -z "$(git replace -l)"
+'
+
+test_expect_success '"git replace" replacing' '
+     git replace $HASH2 $R &&
+     git show $HASH2 | grep "O Thor" &&
+     test_must_fail git replace $HASH2 $R &&
+     git replace -f $HASH2 $R &&
+     test_must_fail git replace -f &&
+     test "$HASH2" = "$(git replace)"
+'
+
+# This creates a side branch where the bug in H2
+# does not appear because P2 is created by applying
+# H2 and squashing H5 into it.
+# P3, P4 and P6 are created by cherry-picking H3, H4
+# and H6 respectively.
+#
+# At this point, we should have the following:
+#
+#    P2--P3--P4--P6
+#   /
+# H1-H2-H3-H4-H5-H6-H7
+#
+# Then we replace H6 with P6.
+#
+test_expect_success 'create parallel branch without the bug' '
+     git replace -d $HASH2 &&
+     git show $HASH2 | grep "A U Thor" &&
+     git checkout $HASH1 &&
+     git cherry-pick $HASH2 &&
+     git show $HASH5 | git apply &&
+     git commit --amend -m "hello: 4 more lines WITHOUT the bug" hello &&
+     PARA2=$(git rev-parse --verify HEAD) &&
+     git cherry-pick $HASH3 &&
+     PARA3=$(git rev-parse --verify HEAD) &&
+     git cherry-pick $HASH4 &&
+     PARA4=$(git rev-parse --verify HEAD) &&
+     git cherry-pick $HASH6 &&
+     PARA6=$(git rev-parse --verify HEAD) &&
+     git replace $HASH6 $PARA6 &&
+     git checkout master &&
+     cur=$(git rev-parse --verify HEAD) &&
+     test "$cur" = "$HASH7" &&
+     git log --pretty=oneline | grep $PARA2 &&
+     git remote add cloned ./clone_dir
+'
+
+test_expect_success 'push to cloned repo' '
+     git push cloned $HASH6^:refs/heads/parallel &&
+     cd clone_dir &&
+     git checkout parallel &&
+     git log --pretty=oneline | grep $PARA2 &&
+     cd ..
+'
+
+test_expect_success 'push branch with replacement' '
+     git cat-file commit $PARA3 | grep "author A U Thor" &&
+     S=$(git cat-file commit $PARA3 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
+     git cat-file commit $S | grep "author O Thor" &&
+     git replace $PARA3 $S &&
+     git show $HASH6~2 | grep "O Thor" &&
+     git show $PARA3 | grep "O Thor" &&
+     git push cloned $HASH6^:refs/heads/parallel2 &&
+     cd clone_dir &&
+     git checkout parallel2 &&
+     git log --pretty=oneline | grep $PARA3 &&
+     git show $PARA3 | grep "A U Thor" &&
+     cd ..
+'
+
+test_expect_success 'fetch branch with replacement' '
+     git branch tofetch $HASH6 &&
+     cd clone_dir &&
+     git fetch origin refs/heads/tofetch:refs/heads/parallel3
+     git log --pretty=oneline parallel3 | grep $PARA3
+     git show $PARA3 | grep "A U Thor"
+     cd ..
+'
+
+#
+#
+test_done
diff --git a/t/t7060-wtstatus.sh b/t/t7060-wtstatus.sh
new file mode 100755
index 0000000000..1044aa6549
--- /dev/null
+++ b/t/t7060-wtstatus.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+
+test_description='basic work tree status reporting'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+	test_commit A &&
+	test_commit B oneside added &&
+	git checkout A^0 &&
+	test_commit C oneside created
+'
+
+test_expect_success 'A/A conflict' '
+	git checkout B^0 &&
+	test_must_fail git merge C
+'
+
+test_expect_success 'Report path with conflict' '
+	git diff --cached --name-status >actual &&
+	echo "U	oneside" >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'Report new path with conflict' '
+	git diff --cached --name-status HEAD^ >actual &&
+	echo "U	oneside" >expect &&
+	test_cmp expect actual
+'
+
+cat >expect <<EOF
+# On branch side
+# Unmerged paths:
+#   (use "git reset HEAD <file>..." to unstage)
+#   (use "git add <file>..." to mark resolution)
+#
+#	deleted by us:      foo
+#
+no changes added to commit (use "git add" and/or "git commit -a")
+EOF
+
+test_expect_success 'M/D conflict does not segfault' '
+	mkdir mdconflict &&
+	(
+		cd mdconflict &&
+		git init &&
+		test_commit initial foo "" &&
+		test_commit modify foo foo &&
+		git checkout -b side HEAD^ &&
+		git rm foo &&
+		git commit -m delete &&
+		test_must_fail git merge master &&
+		test_must_fail git status > ../actual
+	) &&
+	test_cmp expect actual
+'
+
+test_done
diff --git a/t/t7401-submodule-summary.sh b/t/t7401-submodule-summary.sh
index 61498293b9..6cc16c39fe 100755
--- a/t/t7401-submodule-summary.sh
+++ b/t/t7401-submodule-summary.sh
@@ -56,6 +56,15 @@ test_expect_success 'modified submodule(forward)' "
 EOF
 "
 
+test_expect_success 'modified submodule(forward), --files' "
+	git submodule summary --files >actual &&
+	diff actual - <<-EOF
+* sm1 $head1...$head2 (1):
+  > Add foo3
+
+EOF
+"
+
 commit_file sm1 &&
 cd sm1 &&
 git reset --hard HEAD~2 >/dev/null &&
@@ -114,6 +123,15 @@ test_expect_success 'typechanged submodule(submodule->blob), --cached' "
 EOF
 "
 
+test_expect_success 'typechanged submodule(submodule->blob), --files' "
+    git submodule summary --files >actual &&
+    diff actual - <<-EOF
+* sm1 $head5(blob)->$head4(submodule) (3):
+  > Add foo5
+
+EOF
+"
+
 rm -rf sm1 &&
 git checkout-index sm1
 test_expect_success 'typechanged submodule(submodule->blob)' "
@@ -205,4 +223,8 @@ test_expect_success '--for-status' "
 EOF
 "
 
+test_expect_success 'fail when using --files together with --cached' "
+    test_must_fail git submodule summary --files --cached
+"
+
 test_done
diff --git a/t/t7406-submodule-reference.sh b/t/t7406-submodule-reference.sh
deleted file mode 100755
index cc16d3f05d..0000000000
--- a/t/t7406-submodule-reference.sh
+++ /dev/null
@@ -1,81 +0,0 @@
-#!/bin/sh
-#
-# Copyright (c) 2009, Red Hat Inc, Author: Michael S. Tsirkin (mst@redhat.com)
-#
-
-test_description='test clone --reference'
-. ./test-lib.sh
-
-base_dir=`pwd`
-
-U=$base_dir/UPLOAD_LOG
-
-test_expect_success 'preparing first repository' \
-'test_create_repo A && cd A &&
-echo first > file1 &&
-git add file1 &&
-git commit -m A-initial'
-
-cd "$base_dir"
-
-test_expect_success 'preparing second repository' \
-'git clone A B && cd B &&
-echo second > file2 &&
-git add file2 &&
-git commit -m B-addition &&
-git repack -a -d &&
-git prune'
-
-cd "$base_dir"
-
-test_expect_success 'preparing supermodule' \
-'test_create_repo super && cd super &&
-echo file > file &&
-git add file &&
-git commit -m B-super-initial'
-
-cd "$base_dir"
-
-test_expect_success 'submodule add --reference' \
-'cd super && git submodule add --reference ../B "file://$base_dir/A" sub &&
-git commit -m B-super-added'
-
-cd "$base_dir"
-
-test_expect_success 'after add: existence of info/alternates' \
-'test `wc -l <super/sub/.git/objects/info/alternates` = 1'
-
-cd "$base_dir"
-
-test_expect_success 'that reference gets used with add' \
-'cd super/sub &&
-echo "0 objects, 0 kilobytes" > expected &&
-git count-objects > current &&
-diff expected current'
-
-cd "$base_dir"
-
-test_expect_success 'cloning supermodule' \
-'git clone super super-clone'
-
-cd "$base_dir"
-
-test_expect_success 'update with reference' \
-'cd super-clone && git submodule update --init --reference ../B'
-
-cd "$base_dir"
-
-test_expect_success 'after update: existence of info/alternates' \
-'test `wc -l <super-clone/sub/.git/objects/info/alternates` = 1'
-
-cd "$base_dir"
-
-test_expect_success 'that reference gets used with update' \
-'cd super-clone/sub &&
-echo "0 objects, 0 kilobytes" > expected &&
-git count-objects > current &&
-diff expected current'
-
-cd "$base_dir"
-
-test_done
diff --git a/t/t7407-submodule-foreach.sh b/t/t7407-submodule-foreach.sh
new file mode 100755
index 0000000000..2a527750ce
--- /dev/null
+++ b/t/t7407-submodule-foreach.sh
@@ -0,0 +1,237 @@
+#!/bin/sh
+#
+# Copyright (c) 2009 Johan Herland
+#
+
+test_description='Test "git submodule foreach"
+
+This test verifies that "git submodule foreach" correctly visits all submodules
+that are currently checked out.
+'
+
+. ./test-lib.sh
+
+
+test_expect_success 'setup a submodule tree' '
+	echo file > file &&
+	git add file &&
+	test_tick &&
+	git commit -m upstream
+	git clone . super &&
+	git clone super submodule &&
+	(
+		cd super &&
+		git submodule add ../submodule sub1 &&
+		git submodule add ../submodule sub2 &&
+		git submodule add ../submodule sub3 &&
+		git config -f .gitmodules --rename-section \
+			submodule.sub1 submodule.foo1 &&
+		git config -f .gitmodules --rename-section \
+			submodule.sub2 submodule.foo2 &&
+		git config -f .gitmodules --rename-section \
+			submodule.sub3 submodule.foo3 &&
+		git add .gitmodules
+		test_tick &&
+		git commit -m "submodules" &&
+		git submodule init sub1 &&
+		git submodule init sub2 &&
+		git submodule init sub3
+	) &&
+	(
+		cd submodule &&
+		echo different > file &&
+		git add file &&
+		test_tick &&
+		git commit -m "different"
+	) &&
+	(
+		cd super &&
+		(
+			cd sub3 &&
+			git pull
+		) &&
+		git add sub3 &&
+		test_tick &&
+		git commit -m "update sub3"
+	)
+'
+
+sub1sha1=$(cd super/sub1 && git rev-parse HEAD)
+sub3sha1=$(cd super/sub3 && git rev-parse HEAD)
+
+cat > expect <<EOF
+Entering 'sub1'
+foo1-sub1-$sub1sha1
+Entering 'sub3'
+foo3-sub3-$sub3sha1
+EOF
+
+test_expect_success 'test basic "submodule foreach" usage' '
+	git clone super clone &&
+	(
+		cd clone &&
+		git submodule update --init -- sub1 sub3 &&
+		git submodule foreach "echo \$name-\$path-\$sha1" > ../actual
+	) &&
+	test_cmp expect actual
+'
+
+test_expect_success 'setup nested submodules' '
+	git clone submodule nested1 &&
+	git clone submodule nested2 &&
+	git clone submodule nested3 &&
+	(
+		cd nested3 &&
+		git submodule add ../submodule submodule &&
+		test_tick &&
+		git commit -m "submodule" &&
+		git submodule init submodule
+	) &&
+	(
+		cd nested2 &&
+		git submodule add ../nested3 nested3 &&
+		test_tick &&
+		git commit -m "nested3" &&
+		git submodule init nested3
+	) &&
+	(
+		cd nested1 &&
+		git submodule add ../nested2 nested2 &&
+		test_tick &&
+		git commit -m "nested2" &&
+		git submodule init nested2
+	) &&
+	(
+		cd super &&
+		git submodule add ../nested1 nested1 &&
+		test_tick &&
+		git commit -m "nested1" &&
+		git submodule init nested1
+	)
+'
+
+test_expect_success 'use "submodule foreach" to checkout 2nd level submodule' '
+	git clone super clone2 &&
+	(
+		cd clone2 &&
+		test ! -d sub1/.git &&
+		test ! -d sub2/.git &&
+		test ! -d sub3/.git &&
+		test ! -d nested1/.git &&
+		git submodule update --init &&
+		test -d sub1/.git &&
+		test -d sub2/.git &&
+		test -d sub3/.git &&
+		test -d nested1/.git &&
+		test ! -d nested1/nested2/.git &&
+		git submodule foreach "git submodule update --init" &&
+		test -d nested1/nested2/.git &&
+		test ! -d nested1/nested2/nested3/.git
+	)
+'
+
+test_expect_success 'use "foreach --recursive" to checkout all submodules' '
+	(
+		cd clone2 &&
+		git submodule foreach --recursive "git submodule update --init" &&
+		test -d nested1/nested2/nested3/.git &&
+		test -d nested1/nested2/nested3/submodule/.git
+	)
+'
+
+cat > expect <<EOF
+Entering 'nested1'
+Entering 'nested1/nested2'
+Entering 'nested1/nested2/nested3'
+Entering 'nested1/nested2/nested3/submodule'
+Entering 'sub1'
+Entering 'sub2'
+Entering 'sub3'
+EOF
+
+test_expect_success 'test messages from "foreach --recursive"' '
+	(
+		cd clone2 &&
+		git submodule foreach --recursive "true" > ../actual
+	) &&
+	test_cmp expect actual
+'
+
+cat > expect <<EOF
+nested1-nested1
+nested2-nested2
+nested3-nested3
+submodule-submodule
+foo1-sub1
+foo2-sub2
+foo3-sub3
+EOF
+
+test_expect_success 'test "foreach --quiet --recursive"' '
+	(
+		cd clone2 &&
+		git submodule foreach -q --recursive "echo \$name-\$path" > ../actual
+	) &&
+	test_cmp expect actual
+'
+
+test_expect_success 'use "update --recursive" to checkout all submodules' '
+	git clone super clone3 &&
+	(
+		cd clone3 &&
+		test ! -d sub1/.git &&
+		test ! -d sub2/.git &&
+		test ! -d sub3/.git &&
+		test ! -d nested1/.git &&
+		git submodule update --init --recursive &&
+		test -d sub1/.git &&
+		test -d sub2/.git &&
+		test -d sub3/.git &&
+		test -d nested1/.git &&
+		test -d nested1/nested2/.git &&
+		test -d nested1/nested2/nested3/.git &&
+		test -d nested1/nested2/nested3/submodule/.git
+	)
+'
+
+nested1sha1=$(cd clone3/nested1 && git rev-parse HEAD)
+nested2sha1=$(cd clone3/nested1/nested2 && git rev-parse HEAD)
+nested3sha1=$(cd clone3/nested1/nested2/nested3 && git rev-parse HEAD)
+submodulesha1=$(cd clone3/nested1/nested2/nested3/submodule && git rev-parse HEAD)
+sub1sha1=$(cd clone3/sub1 && git rev-parse HEAD)
+sub2sha1=$(cd clone3/sub2 && git rev-parse HEAD)
+sub3sha1=$(cd clone3/sub3 && git rev-parse HEAD)
+sub1sha1_short=$(cd clone3/sub1 && git rev-parse --short HEAD)
+sub2sha1_short=$(cd clone3/sub2 && git rev-parse --short HEAD)
+
+cat > expect <<EOF
+ $nested1sha1 nested1 (heads/master)
+ $nested2sha1 nested1/nested2 (heads/master)
+ $nested3sha1 nested1/nested2/nested3 (heads/master)
+ $submodulesha1 nested1/nested2/nested3/submodule (heads/master)
+ $sub1sha1 sub1 ($sub1sha1_short)
+ $sub2sha1 sub2 ($sub2sha1_short)
+ $sub3sha1 sub3 (heads/master)
+EOF
+
+test_expect_success 'test "status --recursive"' '
+	(
+		cd clone3 &&
+		git submodule status --recursive > ../actual
+	) &&
+	test_cmp expect actual
+'
+
+test_expect_success 'use "git clone --recursive" to checkout all submodules' '
+	git clone --recursive super clone4 &&
+	test -d clone4/.git &&
+	test -d clone4/sub1/.git &&
+	test -d clone4/sub2/.git &&
+	test -d clone4/sub3/.git &&
+	test -d clone4/nested1/.git &&
+	test -d clone4/nested1/nested2/.git &&
+	test -d clone4/nested1/nested2/nested3/.git &&
+	test -d clone4/nested1/nested2/nested3/submodule/.git
+'
+
+test_done
diff --git a/t/t7408-submodule-reference.sh b/t/t7408-submodule-reference.sh
new file mode 100755
index 0000000000..cc16d3f05d
--- /dev/null
+++ b/t/t7408-submodule-reference.sh
@@ -0,0 +1,81 @@
+#!/bin/sh
+#
+# Copyright (c) 2009, Red Hat Inc, Author: Michael S. Tsirkin (mst@redhat.com)
+#
+
+test_description='test clone --reference'
+. ./test-lib.sh
+
+base_dir=`pwd`
+
+U=$base_dir/UPLOAD_LOG
+
+test_expect_success 'preparing first repository' \
+'test_create_repo A && cd A &&
+echo first > file1 &&
+git add file1 &&
+git commit -m A-initial'
+
+cd "$base_dir"
+
+test_expect_success 'preparing second repository' \
+'git clone A B && cd B &&
+echo second > file2 &&
+git add file2 &&
+git commit -m B-addition &&
+git repack -a -d &&
+git prune'
+
+cd "$base_dir"
+
+test_expect_success 'preparing supermodule' \
+'test_create_repo super && cd super &&
+echo file > file &&
+git add file &&
+git commit -m B-super-initial'
+
+cd "$base_dir"
+
+test_expect_success 'submodule add --reference' \
+'cd super && git submodule add --reference ../B "file://$base_dir/A" sub &&
+git commit -m B-super-added'
+
+cd "$base_dir"
+
+test_expect_success 'after add: existence of info/alternates' \
+'test `wc -l <super/sub/.git/objects/info/alternates` = 1'
+
+cd "$base_dir"
+
+test_expect_success 'that reference gets used with add' \
+'cd super/sub &&
+echo "0 objects, 0 kilobytes" > expected &&
+git count-objects > current &&
+diff expected current'
+
+cd "$base_dir"
+
+test_expect_success 'cloning supermodule' \
+'git clone super super-clone'
+
+cd "$base_dir"
+
+test_expect_success 'update with reference' \
+'cd super-clone && git submodule update --init --reference ../B'
+
+cd "$base_dir"
+
+test_expect_success 'after update: existence of info/alternates' \
+'test `wc -l <super-clone/sub/.git/objects/info/alternates` = 1'
+
+cd "$base_dir"
+
+test_expect_success 'that reference gets used with update' \
+'cd super-clone/sub &&
+echo "0 objects, 0 kilobytes" > expected &&
+git count-objects > current &&
+diff expected current'
+
+cd "$base_dir"
+
+test_done
diff --git a/t/test-lib.sh b/t/test-lib.sh
index a5b8d03db0..f2ca536472 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -685,6 +685,21 @@ do
 	esac
 done
 
+# Provide an implementation of the 'yes' utility
+yes () {
+	if test $# = 0
+	then
+		y=y
+	else
+		y="$*"
+	fi
+
+	while echo "$y"
+	do
+		:
+	done
+}
+
 # Fix some commands on Windows
 case $(uname -s) in
 *MINGW*)
diff --git a/transport.c b/transport.c
index faee154c38..f7e1663d18 100644
--- a/transport.c
+++ b/transport.c
@@ -1059,11 +1059,12 @@ const struct ref *transport_get_remote_refs(struct transport *transport)
 int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 {
 	int rc;
-	int nr_heads = 0, nr_alloc = 0;
+	int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
 	const struct ref **heads = NULL;
 	const struct ref *rm;
 
 	for (rm = refs; rm; rm = rm->next) {
+		nr_refs++;
 		if (rm->peer_ref &&
 		    !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
 			continue;
@@ -1071,6 +1072,19 @@ int transport_fetch_refs(struct transport *transport, const struct ref *refs)
 		heads[nr_heads++] = rm;
 	}
 
+	if (!nr_heads) {
+		/*
+		 * When deepening of a shallow repository is requested,
+		 * then local and remote refs are likely to still be equal.
+		 * Just feed them all to the fetch method in that case.
+		 * This condition shouldn't be met in a non-deepening fetch
+		 * (see builtin-fetch.c:quickfetch()).
+		 */
+		heads = xmalloc(nr_refs * sizeof(*heads));
+		for (rm = refs; rm; rm = rm->next)
+			heads[nr_heads++] = rm;
+	}
+
 	rc = transport->fetch(transport, nr_heads, heads);
 	free(heads);
 	return rc;
diff --git a/upload-pack.c b/upload-pack.c
index f7d308a411..4d8be834ff 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -651,6 +651,7 @@ int main(int argc, char **argv)
 	int strict = 0;
 
 	git_extract_argv0_path(argv[0]);
+	read_replace_refs = 0;
 
 	for (i = 1; i < argc; i++) {
 		char *arg = argv[i];
diff --git a/wt-status.c b/wt-status.c
index 47735d8129..63598ce40c 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -1,6 +1,5 @@
 #include "cache.h"
 #include "wt-status.h"
-#include "color.h"
 #include "object.h"
 #include "dir.h"
 #include "commit.h"
@@ -11,38 +10,18 @@
 #include "run-command.h"
 #include "remote.h"
 
-int wt_status_relative_paths = 1;
-int wt_status_use_color = -1;
-static int wt_status_submodule_summary;
-static char wt_status_colors[][COLOR_MAXLEN] = {
+static char default_wt_status_colors[][COLOR_MAXLEN] = {
 	GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
 	GIT_COLOR_GREEN,  /* WT_STATUS_UPDATED */
 	GIT_COLOR_RED,    /* WT_STATUS_CHANGED */
 	GIT_COLOR_RED,    /* WT_STATUS_UNTRACKED */
 	GIT_COLOR_RED,    /* WT_STATUS_NOBRANCH */
+	GIT_COLOR_RED,    /* WT_STATUS_UNMERGED */
 };
 
-enum untracked_status_type show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
-
-static int parse_status_slot(const char *var, int offset)
-{
-	if (!strcasecmp(var+offset, "header"))
-		return WT_STATUS_HEADER;
-	if (!strcasecmp(var+offset, "updated")
-		|| !strcasecmp(var+offset, "added"))
-		return WT_STATUS_UPDATED;
-	if (!strcasecmp(var+offset, "changed"))
-		return WT_STATUS_CHANGED;
-	if (!strcasecmp(var+offset, "untracked"))
-		return WT_STATUS_UNTRACKED;
-	if (!strcasecmp(var+offset, "nobranch"))
-		return WT_STATUS_NOBRANCH;
-	die("bad config variable '%s'", var);
-}
-
-static const char *color(int slot)
+static const char *color(int slot, struct wt_status *s)
 {
-	return wt_status_use_color > 0 ? wt_status_colors[slot] : "";
+	return s->use_color > 0 ? s->color_palette[slot] : "";
 }
 
 void wt_status_prepare(struct wt_status *s)
@@ -51,16 +30,35 @@ void wt_status_prepare(struct wt_status *s)
 	const char *head;
 
 	memset(s, 0, sizeof(*s));
+	memcpy(s->color_palette, default_wt_status_colors,
+	       sizeof(default_wt_status_colors));
+	s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
+	s->use_color = -1;
+	s->relative_paths = 1;
 	head = resolve_ref("HEAD", sha1, 0, NULL);
 	s->branch = head ? xstrdup(head) : NULL;
 	s->reference = "HEAD";
 	s->fp = stdout;
 	s->index_file = get_index_file();
+	s->change.strdup_strings = 1;
+	s->untracked.strdup_strings = 1;
+}
+
+static void wt_status_print_unmerged_header(struct wt_status *s)
+{
+	const char *c = color(WT_STATUS_HEADER, s);
+	color_fprintf_ln(s->fp, c, "# Unmerged paths:");
+	if (!s->is_initial)
+		color_fprintf_ln(s->fp, c, "#   (use \"git reset %s <file>...\" to unstage)", s->reference);
+	else
+		color_fprintf_ln(s->fp, c, "#   (use \"git rm --cached <file>...\" to unstage)");
+	color_fprintf_ln(s->fp, c, "#   (use \"git add <file>...\" to mark resolution)");
+	color_fprintf_ln(s->fp, c, "#");
 }
 
 static void wt_status_print_cached_header(struct wt_status *s)
 {
-	const char *c = color(WT_STATUS_HEADER);
+	const char *c = color(WT_STATUS_HEADER, s);
 	color_fprintf_ln(s->fp, c, "# Changes to be committed:");
 	if (!s->is_initial) {
 		color_fprintf_ln(s->fp, c, "#   (use \"git reset %s <file>...\" to unstage)", s->reference);
@@ -73,7 +71,7 @@ static void wt_status_print_cached_header(struct wt_status *s)
 static void wt_status_print_dirty_header(struct wt_status *s,
 					 int has_deleted)
 {
-	const char *c = color(WT_STATUS_HEADER);
+	const char *c = color(WT_STATUS_HEADER, s);
 	color_fprintf_ln(s->fp, c, "# Changed but not updated:");
 	if (!has_deleted)
 		color_fprintf_ln(s->fp, c, "#   (use \"git add <file>...\" to update what will be committed)");
@@ -85,7 +83,7 @@ static void wt_status_print_dirty_header(struct wt_status *s,
 
 static void wt_status_print_untracked_header(struct wt_status *s)
 {
-	const char *c = color(WT_STATUS_HEADER);
+	const char *c = color(WT_STATUS_HEADER, s);
 	color_fprintf_ln(s->fp, c, "# Untracked files:");
 	color_fprintf_ln(s->fp, c, "#   (use \"git add <file>...\" to include in what will be committed)");
 	color_fprintf_ln(s->fp, c, "#");
@@ -93,23 +91,63 @@ static void wt_status_print_untracked_header(struct wt_status *s)
 
 static void wt_status_print_trailer(struct wt_status *s)
 {
-	color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
+	color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "#");
 }
 
 #define quote_path quote_path_relative
 
-static void wt_status_print_filepair(struct wt_status *s,
-				     int t, struct diff_filepair *p)
+static void wt_status_print_unmerged_data(struct wt_status *s,
+					  struct string_list_item *it)
 {
-	const char *c = color(t);
+	const char *c = color(WT_STATUS_UNMERGED, s);
+	struct wt_status_change_data *d = it->util;
+	struct strbuf onebuf = STRBUF_INIT;
+	const char *one, *how = "bug";
+
+	one = quote_path(it->string, -1, &onebuf, s->prefix);
+	color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "#\t");
+	switch (d->stagemask) {
+	case 1: how = "both deleted:"; break;
+	case 2: how = "added by us:"; break;
+	case 3: how = "deleted by them:"; break;
+	case 4: how = "added by them:"; break;
+	case 5: how = "deleted by us:"; break;
+	case 6: how = "both added:"; break;
+	case 7: how = "both modified:"; break;
+	}
+	color_fprintf(s->fp, c, "%-20s%s\n", how, one);
+	strbuf_release(&onebuf);
+}
+
+static void wt_status_print_change_data(struct wt_status *s,
+					int change_type,
+					struct string_list_item *it)
+{
+	struct wt_status_change_data *d = it->util;
+	const char *c = color(change_type, s);
+	int status = status;
+	char *one_name;
+	char *two_name;
 	const char *one, *two;
 	struct strbuf onebuf = STRBUF_INIT, twobuf = STRBUF_INIT;
 
-	one = quote_path(p->one->path, -1, &onebuf, s->prefix);
-	two = quote_path(p->two->path, -1, &twobuf, s->prefix);
+	one_name = two_name = it->string;
+	switch (change_type) {
+	case WT_STATUS_UPDATED:
+		status = d->index_status;
+		if (d->head_path)
+			one_name = d->head_path;
+		break;
+	case WT_STATUS_CHANGED:
+		status = d->worktree_status;
+		break;
+	}
 
-	color_fprintf(s->fp, color(WT_STATUS_HEADER), "#\t");
-	switch (p->status) {
+	one = quote_path(one_name, -1, &onebuf, s->prefix);
+	two = quote_path(two_name, -1, &twobuf, s->prefix);
+
+	color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "#\t");
+	switch (status) {
 	case DIFF_STATUS_ADDED:
 		color_fprintf(s->fp, c, "new file:   %s", one);
 		break;
@@ -135,64 +173,114 @@ static void wt_status_print_filepair(struct wt_status *s,
 		color_fprintf(s->fp, c, "unmerged:   %s", one);
 		break;
 	default:
-		die("bug: unhandled diff status %c", p->status);
+		die("bug: unhandled diff status %c", status);
 	}
 	fprintf(s->fp, "\n");
 	strbuf_release(&onebuf);
 	strbuf_release(&twobuf);
 }
 
-static void wt_status_print_updated_cb(struct diff_queue_struct *q,
-		struct diff_options *options,
-		void *data)
+static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
+					 struct diff_options *options,
+					 void *data)
 {
 	struct wt_status *s = data;
-	int shown_header = 0;
 	int i;
+
+	if (!q->nr)
+		return;
+	s->workdir_dirty = 1;
 	for (i = 0; i < q->nr; i++) {
-		if (q->queue[i]->status == 'U')
-			continue;
-		if (!shown_header) {
-			wt_status_print_cached_header(s);
-			s->commitable = 1;
-			shown_header = 1;
+		struct diff_filepair *p;
+		struct string_list_item *it;
+		struct wt_status_change_data *d;
+
+		p = q->queue[i];
+		it = string_list_insert(p->one->path, &s->change);
+		d = it->util;
+		if (!d) {
+			d = xcalloc(1, sizeof(*d));
+			it->util = d;
 		}
-		wt_status_print_filepair(s, WT_STATUS_UPDATED, q->queue[i]);
+		if (!d->worktree_status)
+			d->worktree_status = p->status;
 	}
-	if (shown_header)
-		wt_status_print_trailer(s);
 }
 
-static void wt_status_print_changed_cb(struct diff_queue_struct *q,
-                        struct diff_options *options,
-                        void *data)
+static int unmerged_mask(const char *path)
+{
+	int pos, mask;
+	struct cache_entry *ce;
+
+	pos = cache_name_pos(path, strlen(path));
+	if (0 <= pos)
+		return 0;
+
+	mask = 0;
+	pos = -pos-1;
+	while (pos < active_nr) {
+		ce = active_cache[pos++];
+		if (strcmp(ce->name, path) || !ce_stage(ce))
+			break;
+		mask |= (1 << (ce_stage(ce) - 1));
+	}
+	return mask;
+}
+
+static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
+					 struct diff_options *options,
+					 void *data)
 {
 	struct wt_status *s = data;
 	int i;
-	if (q->nr) {
-		int has_deleted = 0;
-		s->workdir_dirty = 1;
-		for (i = 0; i < q->nr; i++)
-			if (q->queue[i]->status == DIFF_STATUS_DELETED) {
-				has_deleted = 1;
-				break;
-			}
-		wt_status_print_dirty_header(s, has_deleted);
+
+	for (i = 0; i < q->nr; i++) {
+		struct diff_filepair *p;
+		struct string_list_item *it;
+		struct wt_status_change_data *d;
+
+		p = q->queue[i];
+		it = string_list_insert(p->two->path, &s->change);
+		d = it->util;
+		if (!d) {
+			d = xcalloc(1, sizeof(*d));
+			it->util = d;
+		}
+		if (!d->index_status)
+			d->index_status = p->status;
+		switch (p->status) {
+		case DIFF_STATUS_COPIED:
+		case DIFF_STATUS_RENAMED:
+			d->head_path = xstrdup(p->one->path);
+			break;
+		case DIFF_STATUS_UNMERGED:
+			d->stagemask = unmerged_mask(p->two->path);
+			break;
+		}
 	}
-	for (i = 0; i < q->nr; i++)
-		wt_status_print_filepair(s, WT_STATUS_CHANGED, q->queue[i]);
-	if (q->nr)
-		wt_status_print_trailer(s);
 }
 
-static void wt_status_print_updated(struct wt_status *s)
+static void wt_status_collect_changes_worktree(struct wt_status *s)
 {
 	struct rev_info rev;
+
+	init_revisions(&rev, NULL);
+	setup_revisions(0, NULL, &rev, NULL);
+	rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
+	rev.diffopt.format_callback = wt_status_collect_changed_cb;
+	rev.diffopt.format_callback_data = s;
+	run_diff_files(&rev, 0);
+}
+
+static void wt_status_collect_changes_index(struct wt_status *s)
+{
+	struct rev_info rev;
+
 	init_revisions(&rev, NULL);
 	setup_revisions(0, NULL, &rev,
 		s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference);
 	rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
-	rev.diffopt.format_callback = wt_status_print_updated_cb;
+	rev.diffopt.format_callback = wt_status_collect_updated_cb;
 	rev.diffopt.format_callback_data = s;
 	rev.diffopt.detect_rename = 1;
 	rev.diffopt.rename_limit = 200;
@@ -200,15 +288,155 @@ static void wt_status_print_updated(struct wt_status *s)
 	run_diff_index(&rev, 1);
 }
 
+static void wt_status_collect_changes_initial(struct wt_status *s)
+{
+	int i;
+
+	for (i = 0; i < active_nr; i++) {
+		struct string_list_item *it;
+		struct wt_status_change_data *d;
+		struct cache_entry *ce = active_cache[i];
+
+		it = string_list_insert(ce->name, &s->change);
+		d = it->util;
+		if (!d) {
+			d = xcalloc(1, sizeof(*d));
+			it->util = d;
+		}
+		if (ce_stage(ce)) {
+			d->index_status = DIFF_STATUS_UNMERGED;
+			d->stagemask |= (1 << (ce_stage(ce) - 1));
+		}
+		else
+			d->index_status = DIFF_STATUS_ADDED;
+	}
+}
+
+static void wt_status_collect_untracked(struct wt_status *s)
+{
+	int i;
+	struct dir_struct dir;
+
+	if (!s->show_untracked_files)
+		return;
+	memset(&dir, 0, sizeof(dir));
+	if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
+		dir.flags |=
+			DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
+	setup_standard_excludes(&dir);
+
+	fill_directory(&dir, NULL);
+	for(i = 0; i < dir.nr; i++) {
+		struct dir_entry *ent = dir.entries[i];
+		if (!cache_name_is_other(ent->name, ent->len))
+			continue;
+		s->workdir_untracked = 1;
+		string_list_insert(ent->name, &s->untracked);
+	}
+}
+
+void wt_status_collect(struct wt_status *s)
+{
+	wt_status_collect_changes_worktree(s);
+
+	if (s->is_initial)
+		wt_status_collect_changes_initial(s);
+	else
+		wt_status_collect_changes_index(s);
+	wt_status_collect_untracked(s);
+}
+
+static void wt_status_print_unmerged(struct wt_status *s)
+{
+	int shown_header = 0;
+	int i;
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		struct string_list_item *it;
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (!d->stagemask)
+			continue;
+		if (!shown_header) {
+			wt_status_print_unmerged_header(s);
+			shown_header = 1;
+		}
+		wt_status_print_unmerged_data(s, it);
+	}
+	if (shown_header)
+		wt_status_print_trailer(s);
+
+}
+
+static void wt_status_print_updated(struct wt_status *s)
+{
+	int shown_header = 0;
+	int i;
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		struct string_list_item *it;
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (!d->index_status ||
+		    d->index_status == DIFF_STATUS_UNMERGED)
+			continue;
+		if (!shown_header) {
+			wt_status_print_cached_header(s);
+			s->commitable = 1;
+			shown_header = 1;
+		}
+		wt_status_print_change_data(s, WT_STATUS_UPDATED, it);
+	}
+	if (shown_header)
+		wt_status_print_trailer(s);
+}
+
+/*
+ * -1 : has delete
+ *  0 : no change
+ *  1 : some change but no delete
+ */
+static int wt_status_check_worktree_changes(struct wt_status *s)
+{
+	int i;
+	int changes = 0;
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		d = s->change.items[i].util;
+		if (!d->worktree_status ||
+		    d->worktree_status == DIFF_STATUS_UNMERGED)
+			continue;
+		changes = 1;
+		if (d->worktree_status == DIFF_STATUS_DELETED)
+			return -1;
+	}
+	return changes;
+}
+
 static void wt_status_print_changed(struct wt_status *s)
 {
-	struct rev_info rev;
-	init_revisions(&rev, "");
-	setup_revisions(0, NULL, &rev, NULL);
-	rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
-	rev.diffopt.format_callback = wt_status_print_changed_cb;
-	rev.diffopt.format_callback_data = s;
-	run_diff_files(&rev, 0);
+	int i;
+	int worktree_changes = wt_status_check_worktree_changes(s);
+
+	if (!worktree_changes)
+		return;
+
+	wt_status_print_dirty_header(s, worktree_changes < 0);
+
+	for (i = 0; i < s->change.nr; i++) {
+		struct wt_status_change_data *d;
+		struct string_list_item *it;
+		it = &(s->change.items[i]);
+		d = it->util;
+		if (!d->worktree_status ||
+		    d->worktree_status == DIFF_STATUS_UNMERGED)
+			continue;
+		wt_status_print_change_data(s, WT_STATUS_CHANGED, it);
+	}
+	wt_status_print_trailer(s);
 }
 
 static void wt_status_print_submodule_summary(struct wt_status *s)
@@ -228,7 +456,7 @@ static void wt_status_print_submodule_summary(struct wt_status *s)
 		NULL
 	};
 
-	sprintf(summary_limit, "%d", wt_status_submodule_summary);
+	sprintf(summary_limit, "%d", s->submodule_summary);
 	snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", s->index_file);
 
 	memset(&sm_summary, 0, sizeof(sm_summary));
@@ -243,32 +471,20 @@ static void wt_status_print_submodule_summary(struct wt_status *s)
 
 static void wt_status_print_untracked(struct wt_status *s)
 {
-	struct dir_struct dir;
 	int i;
-	int shown_header = 0;
 	struct strbuf buf = STRBUF_INIT;
 
-	memset(&dir, 0, sizeof(dir));
-
-	if (!s->untracked)
-		dir.flags |=
-			DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
-	setup_standard_excludes(&dir);
+	if (!s->untracked.nr)
+		return;
 
-	fill_directory(&dir, NULL);
-	for(i = 0; i < dir.nr; i++) {
-		struct dir_entry *ent = dir.entries[i];
-		if (!cache_name_is_other(ent->name, ent->len))
-			continue;
-		if (!shown_header) {
-			s->workdir_untracked = 1;
-			wt_status_print_untracked_header(s);
-			shown_header = 1;
-		}
-		color_fprintf(s->fp, color(WT_STATUS_HEADER), "#\t");
-		color_fprintf_ln(s->fp, color(WT_STATUS_UNTRACKED), "%s",
-				quote_path(ent->name, ent->len,
-					&buf, s->prefix));
+	wt_status_print_untracked_header(s);
+	for (i = 0; i < s->untracked.nr; i++) {
+		struct string_list_item *it;
+		it = &(s->untracked.items[i]);
+		color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "#\t");
+		color_fprintf_ln(s->fp, color(WT_STATUS_UNTRACKED, s), "%s",
+				 quote_path(it->string, strlen(it->string),
+					    &buf, s->prefix));
 	}
 	strbuf_release(&buf);
 }
@@ -310,15 +526,15 @@ static void wt_status_print_tracking(struct wt_status *s)
 		return;
 
 	for (cp = sb.buf; (ep = strchr(cp, '\n')) != NULL; cp = ep + 1)
-		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER),
+		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s),
 				 "# %.*s", (int)(ep - cp), cp);
-	color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
+	color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "#");
 }
 
 void wt_status_print(struct wt_status *s)
 {
 	unsigned char sha1[20];
-	const char *branch_color = color(WT_STATUS_HEADER);
+	const char *branch_color = color(WT_STATUS_HEADER, s);
 
 	s->is_initial = get_sha1(s->reference, sha1) ? 1 : 0;
 	if (s->branch) {
@@ -328,26 +544,29 @@ void wt_status_print(struct wt_status *s)
 			branch_name += 11;
 		else if (!strcmp(branch_name, "HEAD")) {
 			branch_name = "";
-			branch_color = color(WT_STATUS_NOBRANCH);
+			branch_color = color(WT_STATUS_NOBRANCH, s);
 			on_what = "Not currently on any branch.";
 		}
-		color_fprintf(s->fp, color(WT_STATUS_HEADER), "# ");
+		color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "# ");
 		color_fprintf_ln(s->fp, branch_color, "%s%s", on_what, branch_name);
 		if (!s->is_initial)
 			wt_status_print_tracking(s);
 	}
 
+	wt_status_collect(s);
+
 	if (s->is_initial) {
-		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
-		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "# Initial commit");
-		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER), "#");
+		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "#");
+		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "# Initial commit");
+		color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "#");
 	}
 
+	wt_status_print_unmerged(s);
 	wt_status_print_updated(s);
 	wt_status_print_changed(s);
-	if (wt_status_submodule_summary)
+	if (s->submodule_summary)
 		wt_status_print_submodule_summary(s);
-	if (show_untracked_files)
+	if (s->show_untracked_files)
 		wt_status_print_untracked(s);
 	else if (s->commitable)
 		 fprintf(s->fp, "# Untracked files not listed (use -u option to show untracked files)\n");
@@ -361,53 +580,13 @@ void wt_status_print(struct wt_status *s)
 			; /* nothing */
 		else if (s->workdir_dirty)
 			printf("no changes added to commit (use \"git add\" and/or \"git commit -a\")\n");
-		else if (s->workdir_untracked)
+		else if (s->untracked.nr)
 			printf("nothing added to commit but untracked files present (use \"git add\" to track)\n");
 		else if (s->is_initial)
 			printf("nothing to commit (create/copy files and use \"git add\" to track)\n");
-		else if (!show_untracked_files)
+		else if (!s->show_untracked_files)
 			printf("nothing to commit (use -u to show untracked files)\n");
 		else
 			printf("nothing to commit (working directory clean)\n");
 	}
 }
-
-int git_status_config(const char *k, const char *v, void *cb)
-{
-	if (!strcmp(k, "status.submodulesummary")) {
-		int is_bool;
-		wt_status_submodule_summary = git_config_bool_or_int(k, v, &is_bool);
-		if (is_bool && wt_status_submodule_summary)
-			wt_status_submodule_summary = -1;
-		return 0;
-	}
-	if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
-		wt_status_use_color = git_config_colorbool(k, v, -1);
-		return 0;
-	}
-	if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) {
-		int slot = parse_status_slot(k, 13);
-		if (!v)
-			return config_error_nonbool(k);
-		color_parse(v, k, wt_status_colors[slot]);
-		return 0;
-	}
-	if (!strcmp(k, "status.relativepaths")) {
-		wt_status_relative_paths = git_config_bool(k, v);
-		return 0;
-	}
-	if (!strcmp(k, "status.showuntrackedfiles")) {
-		if (!v)
-			return config_error_nonbool(k);
-		else if (!strcmp(v, "no"))
-			show_untracked_files = SHOW_NO_UNTRACKED_FILES;
-		else if (!strcmp(v, "normal"))
-			show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
-		else if (!strcmp(v, "all"))
-			show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
-		else
-			return error("Invalid untracked files mode '%s'", v);
-		return 0;
-	}
-	return git_diff_ui_config(k, v, cb);
-}
diff --git a/wt-status.h b/wt-status.h
index 78add09bd6..a0e75177be 100644
--- a/wt-status.h
+++ b/wt-status.h
@@ -2,13 +2,16 @@
 #define STATUS_H
 
 #include <stdio.h>
+#include "string-list.h"
+#include "color.h"
 
 enum color_wt_status {
-	WT_STATUS_HEADER,
+	WT_STATUS_HEADER = 0,
 	WT_STATUS_UPDATED,
 	WT_STATUS_CHANGED,
 	WT_STATUS_UNTRACKED,
 	WT_STATUS_NOBRANCH,
+	WT_STATUS_UNMERGED,
 };
 
 enum untracked_status_type {
@@ -16,7 +19,13 @@ enum untracked_status_type {
 	SHOW_NORMAL_UNTRACKED_FILES,
 	SHOW_ALL_UNTRACKED_FILES
 };
-extern enum untracked_status_type show_untracked_files;
+
+struct wt_status_change_data {
+	int worktree_status;
+	int index_status;
+	int stagemask;
+	char *head_path;
+};
 
 struct wt_status {
 	int is_initial;
@@ -24,8 +33,13 @@ struct wt_status {
 	const char *reference;
 	int verbose;
 	int amend;
-	int untracked;
 	int nowarn;
+	int use_color;
+	int relative_paths;
+	int submodule_summary;
+	enum untracked_status_type show_untracked_files;
+	char color_palette[WT_STATUS_UNMERGED+1][COLOR_MAXLEN];
+
 	/* These are computed during processing of the individual sections */
 	int commitable;
 	int workdir_dirty;
@@ -33,12 +47,12 @@ struct wt_status {
 	const char *index_file;
 	FILE *fp;
 	const char *prefix;
+	struct string_list change;
+	struct string_list untracked;
 };
 
-int git_status_config(const char *var, const char *value, void *cb);
-extern int wt_status_use_color;
-extern int wt_status_relative_paths;
 void wt_status_prepare(struct wt_status *s);
 void wt_status_print(struct wt_status *s);
+void wt_status_collect(struct wt_status *s);
 
 #endif /* STATUS_H */