gitweb.git
Merge branch 'sb/submodule-doc-intro'Junio C Hamano Thu, 11 Jun 2015 16:29:56 +0000 (09:29 -0700)

Merge branch 'sb/submodule-doc-intro'

* sb/submodule-doc-intro:
submodule doc: reorder introductory paragraphs

Merge branch 'jk/diagnose-config-mmap-failure'Junio C Hamano Thu, 11 Jun 2015 16:29:55 +0000 (09:29 -0700)

Merge branch 'jk/diagnose-config-mmap-failure'

The configuration reader/writer uses mmap(2) interface to access
the files; when we find a directory, it barfed with "Out of memory?".

* jk/diagnose-config-mmap-failure:
xmmap(): drop "Out of memory?"
config.c: rewrite ENODEV into EISDIR when mmap fails
config.c: avoid xmmap error messages
config.c: fix mmap leak when writing config
read-cache.c: drop PROT_WRITE from mmap of index

Merge branch 'mt/p4-depotFile-at-version'Junio C Hamano Thu, 11 Jun 2015 16:29:55 +0000 (09:29 -0700)

Merge branch 'mt/p4-depotFile-at-version'

* mt/p4-depotFile-at-version:
p4: retrieve the right revision of the file in UTF-16 codepath

Merge branch 'mh/verify-lock-error-report'Junio C Hamano Thu, 11 Jun 2015 16:29:54 +0000 (09:29 -0700)

Merge branch 'mh/verify-lock-error-report'

Bring consistency to error reporting mechanism used in "refs" API.

* mh/verify-lock-error-report:
ref_transaction_commit(): do not capitalize error messages
verify_lock(): do not capitalize error messages
verify_lock(): report errors via a strbuf
verify_lock(): on errors, let the caller unlock the lock
verify_lock(): return 0/-1 rather than struct ref_lock *

Merge branch 'jk/color-diff-plain-is-context'Junio C Hamano Thu, 11 Jun 2015 16:29:53 +0000 (09:29 -0700)

Merge branch 'jk/color-diff-plain-is-context'

"color.diff.plain" was a misnomer; give it 'color.diff.context' as
a more logical synonym.

* jk/color-diff-plain-is-context:
diff.h: rename DIFF_PLAIN color slot to DIFF_CONTEXT
diff: accept color.diff.context as a synonym for "plain"

Merge branch 'jk/clone-dissociate'Junio C Hamano Thu, 11 Jun 2015 16:29:52 +0000 (09:29 -0700)

Merge branch 'jk/clone-dissociate'

Code clean-up.

* jk/clone-dissociate:
clone: reorder --dissociate and --reference options
clone: use OPT_STRING_LIST for --reference

Merge branch 'jc/diff-ws-error-highlight'Junio C Hamano Thu, 11 Jun 2015 16:29:51 +0000 (09:29 -0700)

Merge branch 'jc/diff-ws-error-highlight'

Allow whitespace breakages in deleted and context lines to be also
painted in the output.

* jc/diff-ws-error-highlight:
diff.c: --ws-error-highlight=<kind> option
diff.c: add emit_del_line() and emit_context_line()
t4015: separate common setup and per-test expectation
t4015: modernise style

Sync with 2.4.3Junio C Hamano Fri, 5 Jun 2015 19:23:18 +0000 (12:23 -0700)

Sync with 2.4.3

Git 2.4.3 v2.4.3Junio C Hamano Fri, 5 Jun 2015 19:15:57 +0000 (12:15 -0700)

Git 2.4.3

Signed-off-by: Junio C Hamano <gitster@pobox.com>

The first half of the seventh batch for 2.5Junio C Hamano Fri, 5 Jun 2015 19:20:57 +0000 (12:20 -0700)

The first half of the seventh batch for 2.5

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'ld/p4-editor-multi-words'Junio C Hamano Fri, 5 Jun 2015 19:17:38 +0000 (12:17 -0700)

Merge branch 'ld/p4-editor-multi-words'

Unlike "$EDITOR" and "$GIT_EDITOR" that can hold the path to the
command and initial options (e.g. "/path/to/emacs -nw"), 'git p4'
did not let the shell interpolate the contents of the environment
variable that name the editor "$P4EDITOR" (and "$EDITOR", too).
Make it in line with the rest of Git, as well as with Perforce.

* ld/p4-editor-multi-words:
git-p4: tests: use test-chmtime in place of touch
git-p4: fix handling of multi-word P4EDITOR
git-p4: add failing test for P4EDITOR handling

Merge branch 'bc/object-id'Junio C Hamano Fri, 5 Jun 2015 19:17:37 +0000 (12:17 -0700)

Merge branch 'bc/object-id'

for_each_ref() callback functions were taught to name the objects
not with "unsigned char sha1[20]" but with "struct object_id".

* bc/object-id: (56 commits)
struct ref_lock: convert old_sha1 member to object_id
warn_if_dangling_symref(): convert local variable "junk" to object_id
each_ref_fn_adapter(): remove adapter
rev_list_insert_ref(): remove unneeded arguments
rev_list_insert_ref_oid(): new function, taking an object_oid
mark_complete(): remove unneeded arguments
mark_complete_oid(): new function, taking an object_oid
clear_marks(): rewrite to take an object_id argument
mark_complete(): rewrite to take an object_id argument
send_ref(): convert local variable "peeled" to object_id
upload-pack: rewrite functions to take object_id arguments
find_symref(): convert local variable "unused" to object_id
find_symref(): rewrite to take an object_id argument
write_one_ref(): rewrite to take an object_id argument
write_refs_to_temp_dir(): convert local variable sha1 to object_id
submodule: rewrite to take an object_id argument
shallow: rewrite functions to take object_id arguments
handle_one_ref(): rewrite to take an object_id argument
add_info_ref(): rewrite to take an object_id argument
handle_one_reflog(): rewrite to take an object_id argument
...

Merge branch 'jk/at-push-sha1'Junio C Hamano Fri, 5 Jun 2015 19:17:36 +0000 (12:17 -0700)

Merge branch 'jk/at-push-sha1'

Introduce <branch>@{push} short-hand to denote the remote-tracking
branch that tracks the branch at the remote the <branch> would be
pushed to.

* jk/at-push-sha1:
for-each-ref: accept "%(push)" format
for-each-ref: use skip_prefix instead of starts_with
sha1_name: implement @{push} shorthand
sha1_name: refactor interpret_upstream_mark
sha1_name: refactor upstream_mark
remote.c: add branch_get_push
remote.c: return upstream name from stat_tracking_info
remote.c: untangle error logic in branch_get_upstream
remote.c: report specific errors from branch_get_upstream
remote.c: introduce branch_get_upstream helper
remote.c: hoist read_config into remote_get_1
remote.c: provide per-branch pushremote name
remote.c: hoist branch.*.remote lookup out of remote_get_1
remote.c: drop "remote" pointer from "struct branch"
remote.c: refactor setup of branch->merge list
remote.c: drop default_remote_name variable

Merge branch 'dl/branch-error-message' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:29 +0000 (12:00 -0700)

Merge branch 'dl/branch-error-message' into maint

Error messages from "git branch" called remote-tracking branches as
"remote branches".

* dl/branch-error-message:
branch: do not call a "remote-tracking branch" a "remote branch"

Merge branch 'jk/skip-http-tests-under-no-curl' into... Junio C Hamano Fri, 5 Jun 2015 19:00:28 +0000 (12:00 -0700)

Merge branch 'jk/skip-http-tests-under-no-curl' into maint

Test clean-up.

* jk/skip-http-tests-under-no-curl:
tests: skip dav http-push tests under NO_EXPAT=NoThanks
t/lib-httpd.sh: skip tests if NO_CURL is defined

Merge branch 'ps/doc-packfile-vs-pack-file' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:27 +0000 (12:00 -0700)

Merge branch 'ps/doc-packfile-vs-pack-file' into maint

Doc consistency updates.

* ps/doc-packfile-vs-pack-file:
doc: fix inconsistent spelling of "packfile"
pack-protocol.txt: fix insconsistent spelling of "packfile"
git-unpack-objects.txt: fix inconsistent spelling of "packfile"
git-verify-pack.txt: fix inconsistent spelling of "packfile"

Merge branch 'fg/document-commit-message-stripping... Junio C Hamano Fri, 5 Jun 2015 19:00:26 +0000 (12:00 -0700)

Merge branch 'fg/document-commit-message-stripping' into maint

* fg/document-commit-message-stripping:
Documentation: clarify how "git commit" cleans up the edited log message

Merge branch 'jk/rerere-forget-check-enabled' into... Junio C Hamano Fri, 5 Jun 2015 19:00:25 +0000 (12:00 -0700)

Merge branch 'jk/rerere-forget-check-enabled' into maint

"git rerere forget" in a repository without rerere enabled gave a
cryptic error message; it should be a silent no-op instead.

* jk/rerere-forget-check-enabled:
rerere: exit silently on "forget" when rerere is disabled

Merge branch 'pt/pull-log-n' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:24 +0000 (12:00 -0700)

Merge branch 'pt/pull-log-n' into maint

"git pull --log" and "git pull --no-log" worked as expected, but
"git pull --log=20" did not.

* pt/pull-log-n:
pull: handle --log=<n>

Merge branch 'pt/pull-ff-vs-merge-ff' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:23 +0000 (12:00 -0700)

Merge branch 'pt/pull-ff-vs-merge-ff' into maint

The pull.ff configuration was supposed to override the merge.ff
configuration, but it didn't.

* pt/pull-ff-vs-merge-ff:
pull: parse pull.ff as a bool or string
pull: make pull.ff=true override merge.ff

Merge branch 'rs/plug-leak-in-pack-bitmaps' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:22 +0000 (12:00 -0700)

Merge branch 'rs/plug-leak-in-pack-bitmaps' into maint

The code to read pack-bitmap wanted to allocate a few hundred
pointers to a structure, but by mistake allocated and leaked memory
enough to hold that many actual structures. Correct the allocation
size and also have it on stack, as it is small enough.

* rs/plug-leak-in-pack-bitmaps:
pack-bitmaps: plug memory leak, fix allocation size for recent_bitmaps

Merge branch 'ja/tutorial-asciidoctor-fix' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:22 +0000 (12:00 -0700)

Merge branch 'ja/tutorial-asciidoctor-fix' into maint

A literal block in the tutorial had lines with unequal lengths to
delimit it from the rest of the document, which choke GitHub's
AsciiDoc renderer.

* ja/tutorial-asciidoctor-fix:
doc: fix unmatched code fences

Merge branch 'jk/stripspace-asciidoctor-fix' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:20 +0000 (12:00 -0700)

Merge branch 'jk/stripspace-asciidoctor-fix' into maint

A literal block in the tutorial had lines with unequal lengths to
delimit it from the rest of the document, which choke GitHub's
AsciiDoc renderer.

* jk/stripspace-asciidoctor-fix:
doc: fix unmatched code fences in git-stripspace

Merge branch 'jk/asciidoc-markup-fix' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:19 +0000 (12:00 -0700)

Merge branch 'jk/asciidoc-markup-fix' into maint

Various documentation mark-up fixes to make the output more
consistent in general and also make AsciiDoctor (an alternative
formatter) happier.

* jk/asciidoc-markup-fix:
doc: convert AsciiDoc {?foo} to ifdef::foo[]
doc: put example URLs and emails inside literal backticks
doc: drop backslash quoting of some curly braces
doc: convert \--option to --option
doc/add: reformat `--edit` option
doc: fix length of underlined section-title
doc: fix hanging "+"-continuation
doc: fix unquoted use of "{type}"
doc: fix misrendering due to `single quote'

Merge branch 'ps/bundle-verify-arg' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:18 +0000 (12:00 -0700)

Merge branch 'ps/bundle-verify-arg' into maint

"git bundle verify" did not diagnose extra parameters on the
command line.

* ps/bundle-verify-arg:
bundle: verify arguments more strictly

Merge branch 'mh/write-refs-sooner-2.4' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:17 +0000 (12:00 -0700)

Merge branch 'mh/write-refs-sooner-2.4' into maint

Multi-ref transaction support we merged a few releases ago
unnecessarily kept many file descriptors open, risking to fail with
resource exhaustion. This is for 2.4.x track.

* mh/write-refs-sooner-2.4:
ref_transaction_commit(): fix atomicity and avoid fd exhaustion
ref_transaction_commit(): remove the local flags variable
ref_transaction_commit(): inline call to write_ref_sha1()
rename_ref(): inline calls to write_ref_sha1() from this function
commit_ref_update(): new function, extracted from write_ref_sha1()
write_ref_to_lockfile(): new function, extracted from write_ref_sha1()
t7004: rename ULIMIT test prerequisite to ULIMIT_STACK_SIZE
update-ref: test handling large transactions properly
ref_transaction_commit(): fix atomicity and avoid fd exhaustion
ref_transaction_commit(): remove the local flags variable
ref_transaction_commit(): inline call to write_ref_sha1()
rename_ref(): inline calls to write_ref_sha1() from this function
commit_ref_update(): new function, extracted from write_ref_sha1()
write_ref_to_lockfile(): new function, extracted from write_ref_sha1()
t7004: rename ULIMIT test prerequisite to ULIMIT_STACK_SIZE
update-ref: test handling large transactions properly

Merge branch 'mh/ref-directory-file' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:16 +0000 (12:00 -0700)

Merge branch 'mh/ref-directory-file' into maint

The ref API did not handle cases where 'refs/heads/xyzzy/frotz' is
removed at the same time as 'refs/heads/xyzzy' is added (or vice
versa) very well.

* mh/ref-directory-file:
reflog_expire(): integrate lock_ref_sha1_basic() errors into ours
ref_transaction_commit(): delete extra "the" from error message
ref_transaction_commit(): provide better error messages
rename_ref(): integrate lock_ref_sha1_basic() errors into ours
lock_ref_sha1_basic(): improve diagnostics for ref D/F conflicts
lock_ref_sha1_basic(): report errors via a "struct strbuf *err"
verify_refname_available(): report errors via a "struct strbuf *err"
verify_refname_available(): rename function
refs: check for D/F conflicts among refs created in a transaction
ref_transaction_commit(): use a string_list for detecting duplicates
is_refname_available(): use dirname in first loop
struct nonmatching_ref_data: store a refname instead of a ref_entry
report_refname_conflict(): inline function
entry_matches(): inline function
is_refname_available(): convert local variable "dirname" to strbuf
is_refname_available(): avoid shadowing "dir" variable
is_refname_available(): revamp the comments
t1404: new tests of ref D/F conflicts within transactions

Merge branch 'mg/log-decorate-HEAD' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:15 +0000 (12:00 -0700)

Merge branch 'mg/log-decorate-HEAD' into maint

The "log --decorate" enhancement in Git 2.4 that shows the commit
at the tip of the current branch e.g. "HEAD -> master", did not
work with --decorate=full.

* mg/log-decorate-HEAD:
log: do not shorten decoration names too early
log: decorate HEAD with branch name under --decorate=full, too

Merge branch 'sb/t1020-cleanup' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:14 +0000 (12:00 -0700)

Merge branch 'sb/t1020-cleanup' into maint

There was a commented-out (instead of being marked to expect
failure) test that documented a breakage that was fixed since the
test was written; turn it into a proper test.

* sb/t1020-cleanup:
subdirectory tests: code cleanup, uncomment test

Merge branch 'jc/gitignore-precedence' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:12 +0000 (12:00 -0700)

Merge branch 'jc/gitignore-precedence' into maint

core.excludesfile (defaulting to $XDG_HOME/git/ignore) is supposed
to be overridden by repository-specific .git/info/exclude file, but
the order was swapped from the beginning. This belatedly fixes it.

* jc/gitignore-precedence:
ignore: info/exclude should trump core.excludesfile

Merge branch 'bc/connect-plink' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:11 +0000 (12:00 -0700)

Merge branch 'bc/connect-plink' into maint

The connection initiation code for "ssh" transport tried to absorb
differences between the stock "ssh" and Putty-supplied "plink" and
its derivatives, but the logic to tell that we are using "plink"
variants were too loose and falsely triggered when "plink" appeared
anywhere in the path (e.g. "/home/me/bin/uplink/ssh").

* bc/connect-plink:
connect: improve check for plink to reduce false positives
t5601: fix quotation error leading to skipped tests
connect: simplify SSH connection code path

Merge branch 'ph/rebase-i-redo' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:10 +0000 (12:00 -0700)

Merge branch 'ph/rebase-i-redo' into maint

"git rebase -i" moved the "current" command from "todo" to "done" a
bit too prematurely, losing a step when a "pick" did not even start.

* ph/rebase-i-redo:
rebase -i: redo tasks that die during cherry-pick

Merge branch 'jk/add-e-kill-editor' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:09 +0000 (12:00 -0700)

Merge branch 'jk/add-e-kill-editor' into maint

"git add -e" did not allow the user to abort the operation by
killing the editor.

* jk/add-e-kill-editor:
add: check return value of launch_editor

Merge branch 'mh/clone-verbosity-fix' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:08 +0000 (12:00 -0700)

Merge branch 'mh/clone-verbosity-fix' into maint

Git 2.4 broke setting verbosity and progress levels on "git clone"
with native transports.

* mh/clone-verbosity-fix:
clone: call transport_set_verbosity before anything else on the newly created transport

Merge branch 'jk/sha1-file-reduce-useless-warnings... Junio C Hamano Fri, 5 Jun 2015 19:00:07 +0000 (12:00 -0700)

Merge branch 'jk/sha1-file-reduce-useless-warnings' into maint

* jk/sha1-file-reduce-useless-warnings:
sha1_file: squelch "packfile cannot be accessed" warnings

Merge branch 'tb/blame-resurrect-convert-to-git' into... Junio C Hamano Fri, 5 Jun 2015 19:00:06 +0000 (12:00 -0700)

Merge branch 'tb/blame-resurrect-convert-to-git' into maint

Some time ago, "git blame" (incorrectly) lost the convert_to_git()
call when synthesizing a fake "tip" commit that represents the
state in the working tree, which broke folks who record the history
with LF line ending to make their project portabile across
platforms while terminating lines in their working tree files with
CRLF for their platform.

* tb/blame-resurrect-convert-to-git:
blame: CRLF in the working tree and LF in the repo

Merge branch 'jc/plug-fmt-merge-msg-leak' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:05 +0000 (12:00 -0700)

Merge branch 'jc/plug-fmt-merge-msg-leak' into maint

* jc/plug-fmt-merge-msg-leak:
fmt-merge-msg: plug small leak of commit buffer

Merge branch 'pt/xdg-config-path' into maintJunio C Hamano Fri, 5 Jun 2015 19:00:03 +0000 (12:00 -0700)

Merge branch 'pt/xdg-config-path' into maint

Code clean-up for xdg configuration path support.

* pt/xdg-config-path:
path.c: remove home_config_paths()
git-config: replace use of home_config_paths()
git-commit: replace use of home_config_paths()
credential-store.c: replace home_config_paths() with xdg_config_home()
dir.c: replace home_config_paths() with xdg_config_home()
attr.c: replace home_config_paths() with xdg_config_home()
path.c: implement xdg_config_home()
t0302: "unreadable" test needs POSIXPERM
t0302: test credential-store support for XDG_CONFIG_HOME
git-credential-store: support XDG_CONFIG_HOME
git-credential-store: support multiple credential files

Sixth batch for 2.5 cycleJunio C Hamano Mon, 1 Jun 2015 19:47:56 +0000 (12:47 -0700)

Sixth batch for 2.5 cycle

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'sb/test-bitmap-free-at-end'Junio C Hamano Mon, 1 Jun 2015 19:45:21 +0000 (12:45 -0700)

Merge branch 'sb/test-bitmap-free-at-end'

An earlier leakfix to bitmap testing code was incomplete.

* sb/test-bitmap-free-at-end:
test_bitmap_walk: free bitmap with bitmap_free

Merge branch 'mm/rebase-i-post-rewrite-exec'Junio C Hamano Mon, 1 Jun 2015 19:45:20 +0000 (12:45 -0700)

Merge branch 'mm/rebase-i-post-rewrite-exec'

"git rebase -i" fired post-rewrite hook when it shouldn't (namely,
when it was told to stop sequencing with 'exec' insn).

* mm/rebase-i-post-rewrite-exec:
t5407: use <<- to align the expected output
rebase -i: fix post-rewrite hook with failed exec command
rebase -i: demonstrate incorrect behavior of post-rewrite

Merge branch 'fm/fetch-raw-sha1'Junio C Hamano Mon, 1 Jun 2015 19:45:19 +0000 (12:45 -0700)

Merge branch 'fm/fetch-raw-sha1'

"git upload-pack" that serves "git fetch" can be told to serve
commits that are not at the tip of any ref, as long as they are
reachable from a ref, with uploadpack.allowReachableSHA1InWant
configuration variable.

* fm/fetch-raw-sha1:
upload-pack: optionally allow fetching reachable sha1
upload-pack: prepare to extend allow-tip-sha1-in-want
config.txt: clarify allowTipSHA1InWant with camelCase

Merge branch 'sg/help-group'Junio C Hamano Mon, 1 Jun 2015 19:45:18 +0000 (12:45 -0700)

Merge branch 'sg/help-group'

Group list of commands shown by "git help" along the workflow
elements to help early learners.

* sg/help-group:
help: respect new common command grouping
command-list.txt: drop the "common" tag
generate-cmdlist: parse common group commands
command-list.txt: add the common groups block
command-list: prepare machinery for upcoming "common groups" section

Merge branch 'mm/log-format-raw-doc'Junio C Hamano Mon, 1 Jun 2015 19:45:17 +0000 (12:45 -0700)

Merge branch 'mm/log-format-raw-doc'

Clarify that "log --raw" and "log --format=raw" are unrelated
concepts.

* mm/log-format-raw-doc:
Documentation/log: clarify sha1 non-abbreviation in log --raw
Documentation/log: clarify what --raw means

Merge branch 'dt/cat-file-follow-symlinks'Junio C Hamano Mon, 1 Jun 2015 19:45:16 +0000 (12:45 -0700)

Merge branch 'dt/cat-file-follow-symlinks'

"git cat-file --batch(-check)" learned the "--follow-symlinks"
option that follows an in-tree symbolic link when asked about an
object via extended SHA-1 syntax, e.g. HEAD:RelNotes that points at
Documentation/RelNotes/2.5.0.txt. With the new option, the command
behaves as if HEAD:Documentation/RelNotes/2.5.0.txt was given as
input instead.

* dt/cat-file-follow-symlinks:
cat-file: add --follow-symlinks to --batch
sha1_name: get_sha1_with_context learns to follow symlinks
tree-walk: learn get_tree_entry_follow_symlinks

Merge branch 'rs/janitorial'Junio C Hamano Mon, 1 Jun 2015 19:45:15 +0000 (12:45 -0700)

Merge branch 'rs/janitorial'

Code clean-up.

* rs/janitorial:
dir: remove unused variable sb
clean: remove unused variable buf
use file_exists() to check if a file exists in the worktree

Merge branch 'jk/stash-options'Junio C Hamano Mon, 1 Jun 2015 19:45:14 +0000 (12:45 -0700)

Merge branch 'jk/stash-options'

Make "git stash something --help" error out, so that users can
safely say "git stash drop --help".

* jk/stash-options:
stash: recognize "--help" for subcommands
stash: complain about unknown flags

Merge branch 'da/mergetool-winmerge'Junio C Hamano Mon, 1 Jun 2015 19:45:14 +0000 (12:45 -0700)

Merge branch 'da/mergetool-winmerge'

"git mergetool" learned to drive WinMerge as a backend.

* da/mergetool-winmerge:
mergetools: add winmerge as a builtin tool
mergetool--lib: set IFS for difftool and mergetool

Merge branch 'mc/commit-doc-grammofix'Junio C Hamano Mon, 1 Jun 2015 19:45:12 +0000 (12:45 -0700)

Merge branch 'mc/commit-doc-grammofix'

Doc grammar fix.

* mc/commit-doc-grammofix:
Documentation/git-commit: grammofix

Merge branch 'jh/filter-empty-contents'Junio C Hamano Mon, 1 Jun 2015 19:45:10 +0000 (12:45 -0700)

Merge branch 'jh/filter-empty-contents'

The clean/smudge interface did not work well when filtering an
empty contents (failed and then passed the empty input through).
It can be argued that a filter that produces anything but empty for
an empty input is nonsense, but if the user wants to do strange
things, then why not?

* jh/filter-empty-contents:
sha1_file: pass empty buffer to index empty file

Merge branch 'ah/usage-strings'Junio C Hamano Mon, 1 Jun 2015 19:45:09 +0000 (12:45 -0700)

Merge branch 'ah/usage-strings'

A few usage string updates.

* ah/usage-strings:
blame, log: format usage strings similarly to those in documentation

Merge branch 'jk/http-backend-deadlock'Junio C Hamano Mon, 1 Jun 2015 19:45:09 +0000 (12:45 -0700)

Merge branch 'jk/http-backend-deadlock'

Communication between the HTTP server and http_backend process can
lead to a dead-lock when relaying a large ref negotiation request.
Diagnose the situation better, and mitigate it by reading such a
request first into core (to a reasonable limit).

* jk/http-backend-deadlock:
http-backend: spool ref negotiation requests to buffer
t5551: factor out tag creation
http-backend: fix die recursion with custom handler

Merge branch 'dt/clean-pathspec-filter-then-lstat'Junio C Hamano Mon, 1 Jun 2015 19:45:08 +0000 (12:45 -0700)

Merge branch 'dt/clean-pathspec-filter-then-lstat'

"git clean pathspec..." tried to lstat(2) and complain even for
paths outside the given pathspec.

* dt/clean-pathspec-filter-then-lstat:
clean: only lstat files in pathspec

submodule doc: reorder introductory paragraphsStefan Beller Wed, 27 May 2015 19:48:01 +0000 (12:48 -0700)

submodule doc: reorder introductory paragraphs

It's better to start the man page with a description of what
submodules actually are, instead of saying what they are not.

Reorder the paragraphs such that

- the first short paragraph introduces the submodule concept,
- the second paragraph highlights the usage of the submodule command,
- the third paragraph giving background information, and finally
- the fourth paragraph discusing alternatives such as subtrees and
remotes, which we don't want to be confused with.

This ordering deepens the knowledge on submodules with each paragraph.
First the basic questions like "How/what" will be answered, while the
underlying concepts will be taught at a later time.

Making sure it is not confused with subtrees and remotes is not really
enhancing knowledge of submodules itself, but rather painting the big
picture of git concepts, so you could also argue to have it as the second
paragraph. Personally I think this may confuse readers, specially
newcomers though.

Additionally to reordering the paragraphs, they have been slightly
reworded.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

xmmap(): drop "Out of memory?"Junio C Hamano Wed, 27 May 2015 20:30:29 +0000 (13:30 -0700)

xmmap(): drop "Out of memory?"

We show that message with die_errno(), but the OS is ought to know
why mmap(2) failed much better than we do. There is no reason for
us to say "Out of memory?" here.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

config.c: rewrite ENODEV into EISDIR when mmap failsJeff King Thu, 28 May 2015 08:03:01 +0000 (04:03 -0400)

config.c: rewrite ENODEV into EISDIR when mmap fails

If we try to mmap a directory, we'll get ENODEV. This
translates to "no such device" for the user, which is not
very helpful. Since we've just fstat()'d the file, we can
easily check whether the problem was a directory to give a
better message.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

config.c: avoid xmmap error messagesJeff King Thu, 28 May 2015 07:56:15 +0000 (03:56 -0400)

config.c: avoid xmmap error messages

The config-writing code uses xmmap to map the existing
config file, which will die if the map fails. This has two
downsides:

1. The error message is not very helpful, as it lacks any
context about the file we are mapping:

$ mkdir foo
$ git config --file=foo some.key value
fatal: Out of memory? mmap failed: No such device

2. We normally do not die in this code path; instead, we'd
rather report the error and return an appropriate exit
status (which is part of the public interface
documented in git-config.1).

This patch introduces a "gentle" form of xmmap which lets us
produce our own error message. We do not want to use mmap
directly, because we would like to use the other
compatibility elements of xmmap (e.g., handling 0-length
maps portably).

The end result is:

$ git.compile config --file=foo some.key value
error: unable to mmap 'foo': No such device
$ echo $?
3

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

config.c: fix mmap leak when writing configJeff King Thu, 28 May 2015 07:54:43 +0000 (03:54 -0400)

config.c: fix mmap leak when writing config

We mmap the existing config file, but fail to unmap it if we
hit an error. The function already has a shared exit path,
so we can fix this by moving the mmap pointer to the
function scope and clearing it in the shared exit.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

read-cache.c: drop PROT_WRITE from mmap of indexJeff King Thu, 28 May 2015 07:54:00 +0000 (03:54 -0400)

read-cache.c: drop PROT_WRITE from mmap of index

Once upon a time, git's in-memory representation of a cache
entry actually pointed to the mmap'd on-disk data. So in
520fc24 (Allow writing to the private index file mapping.,
2005-04-26), we specified PROT_WRITE so that we could tweak
the entries while we run (in our own MAP_PRIVATE copy-on-write
version, of course).

Later, 7a51ed6 (Make on-disk index representation separate
from in-core one, 2008-01-14) stopped doing this; we copy
the data into our in-core representation, and then drop the
mmap immediately. We can therefore drop the PROT_WRITE flag.
It's probably not hurting anything as it is, but it's
potentially confusing.

Note that we could also mark the mapping as "const" to
verify that we never write to it. However, we don't
typically do that for our other maps, as it then requires
casting to munmap() it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

p4: retrieve the right revision of the file in UTF... Miguel Torroja Wed, 27 May 2015 23:14:39 +0000 (01:14 +0200)

p4: retrieve the right revision of the file in UTF-16 codepath

Fixing bug with UTF-16 files when they are retrieved by git-p4. It
was always getting the tip version of the file and the history of
the file was lost.

Signed-off-by: Miguel Torroja <miguel.torroja@gmail.com>
Acked-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

ref_transaction_commit(): do not capitalize error messagesMichael Haggerty Fri, 22 May 2015 23:34:57 +0000 (01:34 +0200)

ref_transaction_commit(): do not capitalize error messages

Our convention is for error messages to start with a lower-case
letter.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

verify_lock(): do not capitalize error messagesMichael Haggerty Fri, 22 May 2015 23:34:56 +0000 (01:34 +0200)

verify_lock(): do not capitalize error messages

Our convention is for error messages to start with a lower-case
letter.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

verify_lock(): report errors via a strbufMichael Haggerty Fri, 22 May 2015 23:34:55 +0000 (01:34 +0200)

verify_lock(): report errors via a strbuf

Instead of writing error messages directly to stderr, write them to
a "strbuf *err". The caller, lock_ref_sha1_basic(), uses this error
reporting convention with all the other callees, and reports its
error this way to its callers.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff.h: rename DIFF_PLAIN color slot to DIFF_CONTEXTJeff King Wed, 27 May 2015 20:48:46 +0000 (16:48 -0400)

diff.h: rename DIFF_PLAIN color slot to DIFF_CONTEXT

The latter is a much more descriptive name (and we support
"color.diff.context" now). This also updates the name of any
local variables which were used to store the color.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff: accept color.diff.context as a synonym for "plain"Jeff King Wed, 27 May 2015 07:22:19 +0000 (03:22 -0400)

diff: accept color.diff.context as a synonym for "plain"

The term "plain" is a bit ambiguous; let's allow the more
specific "context", but keep "plain" around for
compatibility.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'nd/untracked-cache'Junio C Hamano Wed, 27 May 2015 20:14:38 +0000 (13:14 -0700)

Merge branch 'nd/untracked-cache'

* nd/untracked-cache:
t7063: hide stderr from setup inside prereq

t7063: hide stderr from setup inside prereqJeff King Wed, 27 May 2015 09:34:58 +0000 (05:34 -0400)

t7063: hide stderr from setup inside prereq

When t7063 starts, it runs "update-index --untracked-cache"
to see if we support the untracked cache. Its output goes
straight to stderr, even if the test is not run with "-v".
Let's wrap it in a prereq that will hide the output by
default, but show it with "-v".

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

verify_lock(): on errors, let the caller unlock the... Michael Haggerty Fri, 22 May 2015 23:34:54 +0000 (01:34 +0200)

verify_lock(): on errors, let the caller unlock the lock

The caller already knows how to do it, so always do it in the same
place.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

verify_lock(): return 0/-1 rather than struct ref_lock *Michael Haggerty Fri, 22 May 2015 23:34:53 +0000 (01:34 +0200)

verify_lock(): return 0/-1 rather than struct ref_lock *

Its return value wasn't conveying any extra information, but it made
the reader wonder whether the ref_lock that it returned might be
different than the one that was passed to it. So change the function
to the traditional "return 0 on success or a negative value on error".

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

clone: reorder --dissociate and --reference optionsJeff King Thu, 21 May 2015 04:16:04 +0000 (00:16 -0400)

clone: reorder --dissociate and --reference options

These options are intimately related, so it makes sense to
list them nearby in the "-h" output (they are already
adjacent in the manpage).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

clone: use OPT_STRING_LIST for --referenceJeff King Thu, 21 May 2015 04:15:19 +0000 (00:15 -0400)

clone: use OPT_STRING_LIST for --reference

Not only does this save us having to implement a custom
callback, but it handles "--no-reference" in the usual way
(to clear the list).

The generic callback does copy the string, which we don't
technically need, but that should not hurt anything.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff.c: --ws-error-highlight=<kind> optionJunio C Hamano Tue, 26 May 2015 17:11:28 +0000 (10:11 -0700)

diff.c: --ws-error-highlight=<kind> option

Traditionally, we only cared about whitespace breakages introduced
in new lines. Some people want to paint whitespace breakages on old
lines, too. When they see a whitespace breakage on a new line, they
can spot the same kind of whitespace breakage on the corresponding
old line and want to say "Ah, those breakages are there but they
were inherited from the original, so let's not touch them for now."

Introduce `--ws-error-highlight=<kind>` option, that lets them pass
a comma separated list of `old`, `new`, and `context` to specify
what lines to highlight whitespace errors on.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff.c: add emit_del_line() and emit_context_line()Junio C Hamano Tue, 26 May 2015 16:56:33 +0000 (09:56 -0700)

diff.c: add emit_del_line() and emit_context_line()

Traditionally, we only had emit_add_line() helper, which knows how
to find and paint whitespace breakages on the given line, because we
only care about whitespace breakages introduced in new lines. The
context lines and old (i.e. deleted) lines are emitted with a
simpler emit_line_0() that paints the entire line in plain or old
colors.

Identify callers of emit_line_0() that show deleted lines and
context lines, have them call new helpers, emit_del_line() and
emit_context_line(), so that we can later tweak what is done to
these two classes of lines.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Sync with 2.4.2Junio C Hamano Tue, 26 May 2015 20:50:39 +0000 (13:50 -0700)

Sync with 2.4.2

Git 2.4.2 v2.4.2Junio C Hamano Tue, 26 May 2015 20:49:59 +0000 (13:49 -0700)

Git 2.4.2

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'jk/still-interesting' into maintJunio C Hamano Tue, 26 May 2015 20:49:26 +0000 (13:49 -0700)

Merge branch 'jk/still-interesting' into maint

"git rev-list --objects $old --not --all" to see if everything that
is reachable from $old is already connected to the existing refs
was very inefficient.

* jk/still-interesting:
limit_list: avoid quadratic behavior from still_interesting

Merge branch 'jc/hash-object' into maintJunio C Hamano Tue, 26 May 2015 20:49:24 +0000 (13:49 -0700)

Merge branch 'jc/hash-object' into maint

"hash-object --literally" introduced in v2.2 was not prepared to
take a really long object type name.

* jc/hash-object:
write_sha1_file(): do not use a separate sha1[] array
t1007: add hash-object --literally tests
hash-object --literally: fix buffer overrun with extra-long object type
git-hash-object.txt: document --literally option

Merge branch 'jk/rebase-quiet-noop' into maintJunio C Hamano Tue, 26 May 2015 20:49:23 +0000 (13:49 -0700)

Merge branch 'jk/rebase-quiet-noop' into maint

"git rebase --quiet" was not quite quiet when there is nothing to
do.

* jk/rebase-quiet-noop:
rebase: silence "git checkout" for noop rebase

Merge branch 'sg/complete-decorate-full-not-long' into... Junio C Hamano Tue, 26 May 2015 20:49:22 +0000 (13:49 -0700)

Merge branch 'sg/complete-decorate-full-not-long' into maint

The completion for "log --decorate=" parameter value was incorrect.

* sg/complete-decorate-full-not-long:
completion: fix and update 'git log --decorate=' options

Merge branch 'jk/filter-branch-use-of-sed-on-incomplete... Junio C Hamano Tue, 26 May 2015 20:49:20 +0000 (13:49 -0700)

Merge branch 'jk/filter-branch-use-of-sed-on-incomplete-line' into maint

"filter-branch" corrupted commit log message that ends with an
incomplete line on platforms with some "sed" implementations that
munge such a line. Work it around by avoiding to use "sed".

* jk/filter-branch-use-of-sed-on-incomplete-line:
filter-branch: avoid passing commit message through sed

Merge branch 'jc/daemon-no-ipv6-for-2.4.1' into maintJunio C Hamano Tue, 26 May 2015 20:49:19 +0000 (13:49 -0700)

Merge branch 'jc/daemon-no-ipv6-for-2.4.1' into maint

"git daemon" fails to build from the source under NO_IPV6
configuration (regression in 2.4).

* jc/daemon-no-ipv6-for-2.4.1:
daemon: unbreak NO_IPV6 build regression

Merge branch 'jk/stash-require-clean-index' into maintJunio C Hamano Tue, 26 May 2015 20:49:19 +0000 (13:49 -0700)

Merge branch 'jk/stash-require-clean-index' into maint

"git stash pop/apply" forgot to make sure that not just the working
tree is clean but also the index is clean. The latter is important
as a stash application can conflict and the index will be used for
conflict resolution.

* jk/stash-require-clean-index:
stash: require a clean index to apply
t3903: avoid applying onto dirty index
t3903: stop hard-coding commit sha1s

Merge branch 'jk/git-no-more-argv0-path-munging' into... Junio C Hamano Tue, 26 May 2015 20:49:18 +0000 (13:49 -0700)

Merge branch 'jk/git-no-more-argv0-path-munging' into maint

We have prepended $GIT_EXEC_PATH and the path "git" is installed in
(typically "/usr/bin") to $PATH when invoking subprograms and hooks
for almost eternity, but the original use case the latter tried to
support was semi-bogus (i.e. install git to /opt/foo/git and run it
without having /opt/foo on $PATH), and more importantly it has
become less and less relevant as Git grew more mainstream (i.e. the
users would _want_ to have it on their $PATH). Stop prepending the
path in which "git" is installed to users' $PATH, as that would
interfere the command search order people depend on (e.g. they may
not like versions of programs that are unrelated to Git in /usr/bin
and want to override them by having different ones in /usr/local/bin
and have the latter directory earlier in their $PATH).

* jk/git-no-more-argv0-path-munging:
stop putting argv[0] dirname at front of PATH

Fifth batch for 2.5 cycleJunio C Hamano Tue, 26 May 2015 20:33:35 +0000 (13:33 -0700)

Fifth batch for 2.5 cycle

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'nd/untracked-cache'Junio C Hamano Tue, 26 May 2015 20:24:45 +0000 (13:24 -0700)

Merge branch 'nd/untracked-cache'

Teach the index to optionally remember already seen untracked files
to speed up "git status" in a working tree with tons of cruft.

* nd/untracked-cache: (24 commits)
git-status.txt: advertisement for untracked cache
untracked cache: guard and disable on system changes
mingw32: add uname()
t7063: tests for untracked cache
update-index: test the system before enabling untracked cache
update-index: manually enable or disable untracked cache
status: enable untracked cache
untracked-cache: temporarily disable with $GIT_DISABLE_UNTRACKED_CACHE
untracked cache: mark index dirty if untracked cache is updated
untracked cache: print stats with $GIT_TRACE_UNTRACKED_STATS
untracked cache: avoid racy timestamps
read-cache.c: split racy stat test to a separate function
untracked cache: invalidate at index addition or removal
untracked cache: load from UNTR index extension
untracked cache: save to an index extension
ewah: add convenient wrapper ewah_serialize_strbuf()
untracked cache: don't open non-existent .gitignore
untracked cache: mark what dirs should be recursed/saved
untracked cache: record/validate dir mtime and reuse cached output
untracked cache: make a wrapper around {open,read,close}dir()
...

Merge branch 'rs/plug-leak-in-pack-bitmaps'Junio C Hamano Tue, 26 May 2015 20:24:44 +0000 (13:24 -0700)

Merge branch 'rs/plug-leak-in-pack-bitmaps'

The code to read pack-bitmap wanted to allocate a few hundred
pointers to a structure, but by mistake allocated and leaked memory
enough to hold that many actual structures. Correct the allocation
size and also have it on stack, as it is small enough.

* rs/plug-leak-in-pack-bitmaps:
pack-bitmaps: plug memory leak, fix allocation size for recent_bitmaps

Merge branch 'pt/pull-ff-vs-merge-ff'Junio C Hamano Tue, 26 May 2015 20:24:43 +0000 (13:24 -0700)

Merge branch 'pt/pull-ff-vs-merge-ff'

The pull.ff configuration was supposed to override the merge.ff
configuration, but it didn't.

* pt/pull-ff-vs-merge-ff:
pull: parse pull.ff as a bool or string
pull: make pull.ff=true override merge.ff

Merge branch 'pt/pull-log-n'Junio C Hamano Tue, 26 May 2015 20:24:43 +0000 (13:24 -0700)

Merge branch 'pt/pull-log-n'

"git pull --log" and "git pull --no-log" worked as expected, but
"git pull --log=20" did not.

* pt/pull-log-n:
pull: handle --log=<n>

Merge branch 'jk/rerere-forget-check-enabled'Junio C Hamano Tue, 26 May 2015 20:24:42 +0000 (13:24 -0700)

Merge branch 'jk/rerere-forget-check-enabled'

"git rerere forget" in a repository without rerere enabled gave a
cryptic error message; it should be a silent no-op instead.

* jk/rerere-forget-check-enabled:
rerere: exit silently on "forget" when rerere is disabled

git-p4: tests: use test-chmtime in place of touchLuke Diamand Tue, 19 May 2015 22:23:18 +0000 (23:23 +0100)

git-p4: tests: use test-chmtime in place of touch

Using "touch" for P4EDITOR means that the tests can be a bit
racy, since git-p4 checks the timestamp has been updated and
fails if the timestamp is not updated.

Use test-chmtime instead, which is designed for this.

Signed-off-by: Luke Diamand <luke@diamand.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t4015: separate common setup and per-test expectationJunio C Hamano Tue, 26 May 2015 18:43:08 +0000 (11:43 -0700)

t4015: separate common setup and per-test expectation

The last two tests in the script were to

- set up color.diff.* slots
- set up an expectation for a single test
- run that test and check the result

but split in a wrong way. It did the first two in the first test
and the third one in the second test. The latter two belong to each
other. This matters when you plan to add more of these tests that
share the common coloring.

While at it, make sure we use a color different from old, which is
also red.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

t4015: modernise styleJunio C Hamano Tue, 26 May 2015 18:19:52 +0000 (11:19 -0700)

t4015: modernise style

Move the preparatory steps that create the expected output inside
the test bodies, remove unnecessary blank lines before and after the
test bodies, and drop SP between redirection operator and its target.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Merge branch 'jk/http-backend-deadlock-2.3' into jk... Junio C Hamano Tue, 26 May 2015 03:44:42 +0000 (20:44 -0700)

Merge branch 'jk/http-backend-deadlock-2.3' into jk/http-backend-deadlock

* jk/http-backend-deadlock-2.3:
http-backend: spool ref negotiation requests to buffer
t5551: factor out tag creation
http-backend: fix die recursion with custom handler

Merge branch 'jk/http-backend-deadlock-2.2' into jk... Junio C Hamano Tue, 26 May 2015 03:44:04 +0000 (20:44 -0700)

Merge branch 'jk/http-backend-deadlock-2.2' into jk/http-backend-deadlock-2.3

* jk/http-backend-deadlock-2.2:
http-backend: spool ref negotiation requests to buffer
t5551: factor out tag creation
http-backend: fix die recursion with custom handler

http-backend: spool ref negotiation requests to bufferJeff King Wed, 20 May 2015 07:37:09 +0000 (03:37 -0400)

http-backend: spool ref negotiation requests to buffer

When http-backend spawns "upload-pack" to do ref
negotiation, it streams the http request body to
upload-pack, who then streams the http response back to the
client as it reads. In theory, git can go full-duplex; the
client can consume our response while it is still sending
the request. In practice, however, HTTP is a half-duplex
protocol. Even if our client is ready to read and write
simultaneously, we may have other HTTP infrastructure in the
way, including the webserver that spawns our CGI, or any
intermediate proxies.

In at least one documented case[1], this leads to deadlock
when trying a fetch over http. What happens is basically:

1. Apache proxies the request to the CGI, http-backend.

2. http-backend gzip-inflates the data and sends
the result to upload-pack.

3. upload-pack acts on the data and generates output over
the pipe back to Apache. Apache isn't reading because
it's busy writing (step 1).

This works fine most of the time, because the upload-pack
output ends up in a system pipe buffer, and Apache reads
it as soon as it finishes writing. But if both the request
and the response exceed the system pipe buffer size, then we
deadlock (Apache blocks writing to http-backend,
http-backend blocks writing to upload-pack, and upload-pack
blocks writing to Apache).

We need to break the deadlock by spooling either the input
or the output. In this case, it's ideal to spool the input,
because Apache does not start reading either stdout _or_
stderr until we have consumed all of the input. So until we
do so, we cannot even get an error message out to the
client.

The solution is fairly straight-forward: we read the request
body into an in-memory buffer in http-backend, freeing up
Apache, and then feed the data ourselves to upload-pack. But
there are a few important things to note:

1. We limit the in-memory buffer to prevent an obvious
denial-of-service attack. This is a new hard limit on
requests, but it's unlikely to come into play. The
default value is 10MB, which covers even the ridiculous
100,000-ref negotation in the included test (that
actually caps out just over 5MB). But it's configurable
on the off chance that you don't mind spending some
extra memory to make even ridiculous requests work.

2. We must take care only to buffer when we have to. For
pushes, the incoming packfile may be of arbitrary
size, and we should connect the input directly to
receive-pack. There's no deadlock problem here, though,
because we do not produce any output until the whole
packfile has been read.

For upload-pack's initial ref advertisement, we
similarly do not need to buffer. Even though we may
generate a lot of output, there is no request body at
all (i.e., it is a GET, not a POST).

[1] http://article.gmane.org/gmane.comp.version-control.git/269020

Test-adapted-from: Dennis Kaarsemaker <dennis@kaarsemaker.net>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

struct ref_lock: convert old_sha1 member to object_idMichael Haggerty Mon, 25 May 2015 18:39:22 +0000 (18:39 +0000)

struct ref_lock: convert old_sha1 member to object_id

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

warn_if_dangling_symref(): convert local variable ... Michael Haggerty Mon, 25 May 2015 18:39:21 +0000 (18:39 +0000)

warn_if_dangling_symref(): convert local variable "junk" to object_id

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

each_ref_fn_adapter(): remove adapterMichael Haggerty Mon, 25 May 2015 18:39:20 +0000 (18:39 +0000)

each_ref_fn_adapter(): remove adapter

All of the callers of the for_each_ref family of functions have now
been rewritten to work with object_ids, so this adapter is no longer
needed.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rev_list_insert_ref(): remove unneeded argumentsMichael Haggerty Mon, 25 May 2015 18:39:19 +0000 (18:39 +0000)

rev_list_insert_ref(): remove unneeded arguments

Now that the function is not being used as an each_ref_sha1_fn, we can
delete the unused arguments in its signature.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

rev_list_insert_ref_oid(): new function, taking an... Michael Haggerty Mon, 25 May 2015 18:39:18 +0000 (18:39 +0000)

rev_list_insert_ref_oid(): new function, taking an object_oid

This function can be used with for_each_ref() without having to be
wrapped.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>