If more than one annotated tag points at the same commit, use the
tag whose tagger field has a more recent date stamp. This resolves
non-deterministic cases where the maintainer has done:
$ git tag -a -m "2.1-rc1" v2.1-rc1 deadbeef
$ git tag -a -m "2.1" v2.1 deadbeef
If the tag is an older-style annotated tag with no tagger date, we
assume a date stamp at the UNIX epoch. This will cause us to prefer
an annotated tag that has a valid date.
We could also try to consider the tag object chain, favoring a tag
that "includes" another one:
$ git tag -a -m "2.1-rc0" v2.1-rc1 deadbeef
$ git tag -a -m "2.1" v2.1 v2.1-rc1
However traversing the tag's object chain looking for inclusion
is much more complicated. Its already very likely that even in
these cases the v2.1 tag will have a more recent tagger date than
v2.1-rc1, so with this change describe should still resolve this
by selecting the more recent v2.1.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Just like with committer dates, we parse the tagger date into the
struct tag so its available for further downstream processing.
However since the tagger header was not introduced until Git 0.99.1
we must consider it optional. For tags missing this header we use
the default date of 0.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
tag.c: Refactor parse_tag_buffer to be saner to program
This code was horribly ugly to follow. The structure of the headers
in an annotated tag object must follow a prescribed order, and most
of these are required. Simplify the entire parsing logic by going
through the headers in the order they are supposed to appear in,
acting on each header as its identified in the buffer.
This change has the same behavior as the older version, its just
easier to read and maintain.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
These lines were incorrectly indented with spaces, violating our
coding style. Its annoying to read with 4 position tab stops, so
fix the indentation to be correct.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/git-clone: Transform description list into item list
so that the list of examples is formatted in the same way as for
git-fetch, and, more importantly, the different identation for the
code blocks in the examples (compared to the immediately preceding code
blocks from url.txt) doesn't look like misformatted, but is clarified by
the items' bullets.
Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/urls: Remove spurious example markers
In urls.txt (which is included from git-{clone,fetch,push}.txt)
several item lists are surrounded by example block markers. This is
problematic for two reasons:
- None of these lists are example lists, so they should not be marked as
such semantically.
- The html output looks weird (bulleted list with left sidebar).
Therefore, remove the example block markers. Output by the man backend
is unaffected.
Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/gitdiffcore: Remove misleading date in heading
Ever since the automatic conversion into man form, the heading
contained a misidentified subheading reading "June 2005".
Remove this since the documentation is more recent, and the correct
date is in the footer.
Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'sp/maint-push-sideband' into maint-1.6.6
* sp/maint-push-sideband:
receive-pack: Send internal errors over side-band #2
t5401: Use a bare repository for the remote peer
receive-pack: Send hook output over side band #2
receive-pack: Wrap status reports inside side-band-64k
receive-pack: Refactor how capabilities are shown to the client
send-pack: demultiplex a sideband stream with status data
run-command: support custom fd-set in async
run-command: Allow stderr to be a caller supplied pipe
bisect: error out when passing bad path parameters
As reported by Mark Lodato, "git bisect", when it was started with
path parameters that match no commit was kind of working without
taking account of path parameters and was reporting something like:
Bisecting: -1 revisions left to test after this (roughly 0 steps)
It is more correct and safer to just error out in this case, before
displaying the revisions left, so this patch does just that.
Note that this bug is very old, it exists at least since v1.5.5.
And it is possible to detect that case earlier in the bisect
algorithm, but it is not clear that it would be an improvement to
error out earlier, on the contrary it may change the behavior of
"git rev-list --bisect-all" for example, which is currently correct.
Signed-off-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The --cherry-pick logic starts by counting the commits on each side,
so that it can filter away commits on the bigger one. However, so
far it missed an opportunity for optimization: it doesn't need to do
any work if either side is empty.
This in particular helps the common use-case 'git rebase -i HEAD~$n':
it internally uses --cherry-pick, but since HEAD~$n is a direct
ancestor the left side is always empty.
Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
utf8.c: speculatively assume utf-8 in strbuf_add_wrapped_text()
is_utf8() works by calling utf8_width() for each character at the
supplied location. In strbuf_add_wrapped_text(), we do that anyway
while wrapping the lines. So instead of checking the encoding
beforehand, optimistically assume that it's utf-8 and wrap along
until an invalid character is hit, and when that happens start over.
This pays off if the text consists only of valid utf-8 characters.
The following command was run against the Linux kernel repo with
git 1.7.0:
$ time git log --format='%b' v2.6.32 >/dev/null
real 0m2.679s
user 0m2.580s
sys 0m0.100s
$ time git log --format='%w(60,4,8)%b' >/dev/null
real 0m4.342s
user 0m4.230s
sys 0m0.110s
And with this patch series:
$ time git log --format='%w(60,4,8)%b' >/dev/null
real 0m3.741s
user 0m3.630s
sys 0m0.110s
So the cost of wrapping is reduced to 70% in this case.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The patch before the previous one made sure that all callers of
strbuf_add_wrapped_text() supply a strbuf. Replace all calls of
strbuf_write() with regular strbuf functions and remove it.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The previous patch made sure that strbuf_add_wrapped_text() (and thus
strbuf_add_indented_text(), too) always get a strbuf. Make use of
this fact by adding strbuf_addchars(), a small helper that adds a
char the specified number of times to a strbuf, and use it to replace
print_spaces().
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
If we remove a path in a/deep/subdirectory, we should try to
remove as many trailing components as possible (i.e.,
subdirectory, then deep, then a). However, the test for the
return value of rmdir was reversed, so we only ever deleted
at most one level.
The fix is in remove_path, so "apply" and "merge-recursive"
also are fixed.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
With NONGIT_OK set, require_work_tree function outside a git repository
gives a syntax error. This is caused by an incorrect use of "test" that
didn't anticipate $(git rev-parse --is-inside-work-tree) may return an
empty string.
Properly quote the argument to "test", and send the standard error stream
to /dev/null to avoid giving duplicate error messages.
Signed-off-by: Gabriel Filion <lelutin@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
If we encounter a symref that is dangling, in most cases we will warn
about it. The one exception is a dangling HEAD, as that indicates a
branch yet to be born.
However, the check in dwim_ref was not quite right. If we were fed
something like "HEAD^0" we would try to resolve "HEAD", see that it is
dangling, and then check whether the _original_ string we got was
"HEAD" (which it wasn't in this case). And that makes no sense; the
dangling thing we found was not "HEAD^0" but rather "HEAD".
Fixing this squelches a scary warning from "submodule summary HEAD" (and
consequently "git status" with status.submodulesummary set) in an empty
repo, as the submodule script calls "git rev-parse -q --verify HEAD^0".
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
stash pop: remove 'apply' options during 'drop' invocation
The 'git stash pop' option parsing used to remove the first argument
in --index mode. At the time this was implemented, this first
argument was always --index. However, since the invention of the -q
option in fcdd0e9 (stash: teach quiet option, 2009-06-17) you can
cause an internal invocation of
git stash drop --index
by running
git stash pop -q --index
which then of course fails because drop doesn't know --index.
To handle this, instead let 'git stash apply' decide what the future
argument to 'drop' should be.
Warning: this means that 'git stash apply' must parse all options that
'drop' can take, and deal with them in the same way. This is
currently true for its only option -q.
Signed-off-by: Thomas Rast <trast@student.ethz.ch> Acked-by: Stephen Boyd <bebarino@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
git-imap-send: Convert LF to CRLF before storing patch to draft box
When storing a message over IMAP (RFC 3501 6.3.11), the message should be
in the format of an RFC 2822 message; most notably, CRLF must be used as
a line terminator.
Convert "\n" line endings in the payload to CRLF before feeding it to
IMAP APPEND command.
Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Signed-off-by: Junio C Hamano <gitster@pobox.com>
t8003: check exit code of command and error message separately
Shell reports exit status only from the most downstream command
in a pipeline. In these tests, we want to make sure that the
command fails in a controlled way, and produces a correct error
message.
This issue was known by Jay who submitted the patch, and also was
pointed out by Hannes during the review process, but I forgot to
fix it up before applying. Sorry about that.
Merge branch 'jc/maint-reflog-bad-timestamp' into maint
* jc/maint-reflog-bad-timestamp:
t0101: use a fixed timestamp when searching in the reflog
Update @{bogus.timestamp} fix not to die()
approxidate_careful() reports errorneous date string
receive-pack: Send internal errors over side-band #2
If the client has requested side-band-64k capability, send any
of the internal error or warning messages in the muxed side-band
stream using the same band as our hook output, band #2. By putting
everything in one stream we ensure all messages are processed by
the side-band demuxer, avoiding interleaving between our own stderr
and the side-band demuxer's stderr buffers.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
We want to avoid the warnings (or later, test failures) about
updating the current branch. It was never my intention to have
this test deal with a repository with a working directory, and it
is a very old bug that the test even used a non-bare repository
for the remote side of the push operations.
This fixes the interleaved output error we were seeing as a test
failure by avoiding the giant warning message we were getting back
about updating the current branch being risky.
Its not a real fix, but is something we should do no matter what,
because the behavior will change in the future to reject, and the
test would break at that time.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
blame would segv if given -L <lineno> with <lineno> past the end of the file.
While we're fixing the bug, add test cases for an invalid <start> when called
as -L <start>,<end> or -L<start>.
Signed-off-by: Jay Soffian <jaysoffian@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
When 921177f (Documentation: improve "add", "pull" and "format-patch"
examples, 2008-05-07) converted this from enumeration header to displayed
text, it failed to adjust for the AsciiDoc's rule to quote backslashes.
In displayed text, backslash is shown verbatim, while in enumeration
header, we need to double it.
We have a similar construct in git-rm.txt documentation, and need to be
careful when somebody wants to update it to match the style of the "git
add" example.
Noticed by: Greg Bacon <gbacon@dbresearch.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The code to guess an output archive's format consumed any --format
options and built a new one. Jonathan noticed that it does so in an
unsafe way, risking to overflow the static buffer fmt_opt.
Change the code to keep the existing --format options intact and to only
add a new one if a format could be guessed based on the output file name.
The new option is added as the first one, allowing the existing ones to
overrule it, i.e. explicit --format options given on the command line win
over format guesses, as before.
To simplify the code further, format_from_name() is changed to return the
full --format option, thus no potentially dangerous sprintf() calls are
needed any more.
Reported-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
If the client requests to enable side-band-64k capability we can
safely send any hook stdout or stderr data down side band #2,
so the client can present it to the user.
If side-band-64k isn't enabled, hooks continue to inherit stderr
from the parent receive-pack process.
When the side band channel is being used the push client will wind up
prefixing all server messages with "remote: ", just like fetch does,
so our test vector has to be updated with the new expected output.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
receive-pack: Wrap status reports inside side-band-64k
If the client requests the side-band-64k protocol capability we
now wrap the status report data inside of packets sent to band #1.
This permits us to later send additional progress or informational
messages down band #2.
If side-band-64k was enabled, we always send a final flush packet
to let the client know we are done transmitting.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
receive-pack: Refactor how capabilities are shown to the client
Moving capability advertisement into the packet_write call itself
makes it easier to add additional capabilities to the list, be
it optional by configuration, or always present in the protocol.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
send-pack: demultiplex a sideband stream with status data
If the server advertises side-band-64k capability, we request
it and pull the status report data out of side band #1, and let
side band #2 go to our stderr. The latter channel be used by the
remote side to send our user messages. This basically mirrors the
side-band-64k capability in upload-pack.
Servers may choose to use side band #2 to send error messages from
hook scripts that are meant for the push end user.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This patch adds the possibility to supply a set of non-0 file
descriptors for async process communication instead of the
default-created pipe.
Additionally, we now support bi-directional communiction with the
async procedure, by giving the async function both read and write
file descriptors.
To retain compatiblity and similar "API feel" with start_command,
we require start_async callers to set .out = -1 to get a readable
file descriptor. If either of .in or .out is 0, we supply no file
descriptor to the async process.
[sp: Note: Erik started this patch, and a huge bulk of it is
his work. All bugs were introduced later by Shawn.]
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com> Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
fast-import: Stream very large blobs directly to pack
If a blob is larger than the configured big-file-threshold, instead
of reading it into a single buffer obtained from malloc, stream it
onto the end of the current pack file. Streaming the larger objects
into the pack avoids the 4+ GiB memory footprint that occurs when
fast-import is processing 2+ GiB blobs.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'bg/maint-add-all-doc' into maint-1.6.5
* bg/maint-add-all-doc:
git-rm doc: Describe how to sync index & work tree
git-add/rm doc: Consistently back-quote
Documentation: 'git add -A' can remove files
Merge commit 'b319ef7' into jc/maint-fix-test-perm
* commit 'b319ef7': (8132 commits)
Add a small patch-mode testing library
git-apply--interactive: Refactor patch mode code
t8005: Nobody writes Russian in shift_jis
Fix severe breakage in "git-apply --whitespace=fix"
Update release notes for 1.6.4
After renaming a section, print any trailing variable definitions
Make section_name_match start on '[', and return the length on success
send-email: detect cycles in alias expansion
Show the presence of untracked files in the bash prompt.
SunOS grep does not understand -C<n> nor -e
Fix export_marks() error handling.
git repack: keep commits hidden by a graft
Add a test showing that 'git repack' throws away grafted-away parents
git branch: clean up detached branch handling
git branch: avoid unnecessary object lookups
git branch: fix performance problem
git svn: fix shallow clone when upstream revision is too new
do_one_ref(): null_sha1 check is not about broken ref
configure.ac: properly unset NEEDS_SSL_WITH_CRYPTO when sha1 func is missing
janitor: useless checks before free
...
Caught by valgrind in t5500, but it is pretty obvious from
reading the code that this is shifting elements of an array
to the left, which needs memmove.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
bash: don't offer remote transport helpers as subcommands
Since commits a2d725b7 (Use an external program to implement fetching
with curl, 2009-08-05) and c9e388bb (Make the
"traditionally-supported" URLs a special case, 2009-09-03) remote
transport helpers like 'remote-ftp' and 'remote-curl' are offered by the
completion script as available subcommands. Not good, since they are
helpers, therefore should not be offered, so filter them out.
Signed-off-by: SZEDER Gábor <szeder@ira.uka.de> Acked-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
The caller will say "It is not a valid object name" if it wants to, and
some callers may even try to see if it names an object and otherwise try to
see if it is a path.
approxidate_careful() reports errorneous date string
For a long time, the time based reflog syntax (e.g. master@{yesterday})
didn't complain when the "human readable" timestamp was misspelled, as
the underlying mechanism tried to be as lenient as possible. The funny
thing was that parsing of "@{now}" even relied on the fact that anything
not recognized by the machinery returned the current timestamp.
Introduce approxidate_careful() that takes an optional pointer to an
integer, that gets assigned 1 when the input does not make sense as a
timestamp.
As I am too lazy to fix all the callers that use approxidate(), most of
the callers do not take advantage of the error checking, but convert the
code to parse reflog to use it as a demonstration.
git-cvsserver: allow regex metacharacters in CVSROOT
When run in a repository with a path name containing regex metacharacters
(e.g. +), git-cvsserver failed to split the client request into CVSROOT
and module. Now metacharacters are disabled for the value of CVSROOT in
the perl regex so that directory names containing metacharacters are
handled properly.
Signed-off-by: Gerrit Pape <pape@smarden.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
builtin-config: Fix crash when using "-f <relative path>" from non-root dir
When your current directory is not at the root of the working tree, and you
use the "-f" option with a relative path, the current code tries to read
from a wrong file, since argv[2] is now beyond the end of the rearranged
argument list.
This patch replaces the incorrect argv[2] with the variable holding the
given config file name.
The bug was introduced by d64ec16 (git config: reorganize to use parseopt).
[jc: added test]
Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'maint' of git://git.spearce.org/git-gui into maint
* 'maint' of git://git.spearce.org/git-gui:
git-gui: work from the .git dir
git-gui: Fix applying a line when all following lines are deletions
git-gui: Correct file_states when unstaging partly staged entry
git-gui: Fix gitk for branch whose name matches local file
git-gui: Keep repo_config(gui.recentrepos) and .gitconfig in sync
git-gui: handle really long error messages in updateindex.
git-gui: Add hotkeys for "Unstage from commit" and "Revert changes"
git-gui: Makefile: consolidate .FORCE-* targets
git-gui: Fix applying a line when all following lines are deletions
If a diff looked like:
@@
context
-del1
-del2
and you wanted to stage the deletion 'del1', the generated patch
wouldn't apply because it was missing the line 'del2' converted to
context, but this line was counted in the @@-line
Signed-off-by: Jeff Epler <jepler@unpythonic.net> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
git-gui: Correct file_states when unstaging partly staged entry
When unstaging a partly staged file or submodule, the file_states
list was not updated properly (unless unstaged linewise). Its
index_info part did not contain the former head_info as it should
have but kept its old value.
This seems not to have had any bad effects but diminishes the value
of the file_states list for future enhancements.
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
git-gui: Fix gitk for branch whose name matches local file
When trying to run gitk on a branch name whose name matches a local
file, it will toss an error saying that the name is ambiguous. Adding
a pair of dashes will make gitk parse the options to the left of
it as branch names. Since wish eats the first pair of dashes we
throw at it, we need to add a second one to ensure they get through.
Signed-off-by: Peter Krefting <peter@softwolves.pp.se> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
git-gui: Keep repo_config(gui.recentrepos) and .gitconfig in sync
When the number of recent repo's gets to ten there can be a
situation where an item is removed from the .gitconfig file via
a call to git config --unset, but the internal representation of
that file (repo_config(gui.recentrepo)) is not updated. Then a
subsequent attempt to remove an item from the list fails because
git-gui attempts to call --unset on a value that has already
been removed. This leads to duplicates in the .gitconfig file,
which then also cause errors if the git-gui tries to --unset them
(rather than using --unset-all. --unset-all is not used because it
is not expected that duplicates should ever be allowed to exist.)
When loading the list of recent repositories (proc _get_recentrepos)
if a repo in the list is not considered a valid git reposoitory
then we should go ahead and remove it so it doesn't take up a slot
in the list (since we limit to 10 items). This will prevent a bunch
of invalid entries in the list (which are not shown) from making
valid entries dissapear off the list even when there are less than
ten valid entries.
See: http://code.google.com/p/msysgit/issues/detail?id=362 Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
git-gui: handle really long error messages in updateindex.
As reported to msysGit (bug #340) it is possible to get some very
long error messages when updating the index. The use of a label to
display this prevents scrolling the output. This patch replaces the
label with a scrollable text widget configured to look like a label.
Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
The function takes two paths, an early part of abs is supposed to match
base; otherwise abs is not a path under base and the function returns the
full path of abs. The caller can easily confuse the implementation by
giving duplicated and needless slashes in these path arguments.
Credit for test script, motivation and initial patch goes to Thomas Rast.
A follow-up fix (squashed) is by Hannes.
merge-recursive: do not return NULL only to cause segfault
merge-recursive calls write_tree_from_memory() to come up with a virtual
tree, with possible conflict markers inside the blob contents, while
merging multiple common ancestors down. It is a bug to call the function
with unmerged entries in the index, even if the merge to come up with the
common ancestor resulted in conflicts. Otherwise the result won't be
expressible as a tree object.
We _might_ want to suggest the user to set GIT_MERGE_VERBOSITY to 5 and
re-run the merge in the message. At least we will know which part of
process_renames() or process_entry() functions is not correctly handling
the unmerged paths, and it might help us diagnosing the issue.
retry request without query when info/refs?query fails
When "info/refs" is a static file and not behind a CGI handler, some
servers may not handle a GET request for it with a query string
appended (eg. "?foo=bar") properly.
If such a request fails, retry it sans the query string. In addition,
ensure that the "smart" http protocol is not used (a service has to be
specified with "?service=<service name>" to be conformant).
Signed-off-by: Tay Ray Chuan <rctay89@gmail.com> Reported-and-tested-by: Yaroslav Halchenko <debian@onerussian.com> Acked-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fix "log" family not to be too agressive about showing notes
Giving "Notes" information in the default output format of "log" and
"show" is a sensible progress (the user has asked for it by having the
notes), but for some commands (e.g. "format-patch") spewing notes into the
formatted commit log message without being asked is too aggressive.
Enable notes output only for "log", "show", "whatchanged" by default and
only when the user didn't ask any specific --pretty/--format from the
command line; users can explicitly override this default with --show-notes
and --no-notes option.
Parts of tests are taken from Jeff King's fix.
Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>