Commit Graph

610 Commits

Author SHA1 Message Date
John Keeping
8fee872647 completion: add missing options for git-merge
The options added to __git_merge_options are those that git-pull passes
to git-merge, since that variable is used by both commands.

Those added directly in _git_merge() are specific to git-merge and
are not passed thru from git-pull.

Reported-by: Haralan Dobrev <hkdobrev@gmail.com>
Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-27 12:27:50 -07:00
John Keeping
6d2b06f02b completion: add a note that merge options are shared
This should avoid future confusion after a subsequent patch has added
some options to __git_merge_options and some directly in _git_merge().

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-27 12:27:36 -07:00
Junio C Hamano
df43b41afc Merge branch 'rh/prompt-pcmode-avoid-eval-on-refname'
* rh/prompt-pcmode-avoid-eval-on-refname:
  git-prompt.sh: don't assume the shell expands the value of PS1
2014-05-19 16:10:10 -07:00
Richard Hansen
1e4119c81b git-prompt.sh: don't assume the shell expands the value of PS1
Not all shells subject the prompt string to parameter expansion.  Test
whether the shell will expand the value of PS1, and use the result to
control whether raw ref names are included directly in PS1.

This fixes a regression introduced in commit 8976500 ("git-prompt.sh:
don't put unsanitized branch names in $PS1"):  zsh does not expand PS1
by default, but that commit assumed it did.  The bug resulted in
prompts containing the literal string '${__git_ps1_branch_name}'
instead of the actual branch name.

Reported-by: Caleb Thompson <caleb@calebthompson.io>
Signed-off-by: Richard Hansen <rhansen@bbn.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-19 16:09:53 -07:00
Junio C Hamano
6308767f0b Merge branch 'fc/prompt-zsh-read-from-file'
* fc/prompt-zsh-read-from-file:
  contrib: completion: fix 'eread()' namespace
2014-05-13 11:53:14 -07:00
Felipe Contreras
66ab301c16 contrib: completion: fix 'eread()' namespace
Otherwise it might collide with a function of the same name in the
user's environment.

Suggested-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-05-13 11:52:51 -07:00
Junio C Hamano
f7003da0f4 Merge branch 'rh/prompt-pcmode-avoid-eval-on-refname'
* rh/prompt-pcmode-avoid-eval-on-refname:
  git-prompt.sh: don't put unsanitized branch names in $PS1
2014-05-02 13:10:53 -07:00
Richard Hansen
8976500cbb git-prompt.sh: don't put unsanitized branch names in $PS1
Both bash and zsh subject the value of PS1 to parameter expansion,
command substitution, and arithmetic expansion.  Rather than include
the raw, unescaped branch name in PS1 when running in two- or
three-argument mode, construct PS1 to reference a variable that holds
the branch name.  Because the shells do not recursively expand, this
avoids arbitrary code execution by specially-crafted branch names such
as '$(IFS=_;cmd=sudo_rm_-rf_/;$cmd)'.

Signed-off-by: Richard Hansen <rhansen@bbn.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-04-22 12:37:53 -07:00
Junio C Hamano
961c1b191a Merge branch 'fc/complete-aliased-push'
* fc/complete-aliased-push:
  completion: fix completing args of aliased "push", "fetch", etc.
2014-04-18 11:17:36 -07:00
Felipe Contreras
59d3924fbb prompt: fix missing file errors in zsh
zsh seems to have a bug while redirecting the stderr of the 'read'
command:

    % read foo 2>/dev/null <foo
    zsh: no such file or directory: foo

Which causes errors to be displayed when certain files are missing.
Let's add a convenience function to manually check if the file is
readable before calling "read".

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-04-14 13:27:23 -07:00
Felipe Contreras
880111c11b completion: fix completing args of aliased "push", "fetch", etc.
Some commands need the first word to determine the actual action that is
being executed, however, the command is wrong when we use an alias, for
example 'alias.p=push', if we try to complete 'git p origin ', the
result would be wrong because __git_complete_remote_or_refspec() doesn't
know where it came from.

So let's override words[1], so the alias 'p' is override by the actual
command, 'push'.

Reported-by: Aymeric Beaumet <aymeric.beaumet@gmail.com>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-04-09 14:22:18 -07:00
Junio C Hamano
baf9e83c21 Merge branch 'ss/completion-rec-sub-fetch-push'
* ss/completion-rec-sub-fetch-push:
  completion: teach --recurse-submodules to fetch, pull and push
2014-03-14 14:24:15 -07:00
Sup Yut Sum
4dd5c4709a completion: teach --recurse-submodules to fetch, pull and push
Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-11 11:17:04 -08:00
Junio C Hamano
ba98a2f660 Merge branch 'jk/complete-merge-base'
* jk/complete-merge-base:
  completion: handle --[no-]fork-point options to git-rebase
  completion: complete merge-base options
2014-01-27 10:43:55 -08:00
John Keeping
4310e328d4 completion: handle --[no-]fork-point options to git-rebase
Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-13 14:20:31 -08:00
John Keeping
85453fd1e3 completion: complete merge-base options
Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-13 14:20:25 -08:00
Junio C Hamano
ca46578a1d Merge branch 'rr/completion-format-coverletter'
The bash/zsh completion code did not know about format.coverLetter
among many format.* configuration variables.

* rr/completion-format-coverletter:
  completion: complete format.coverLetter
2014-01-13 11:33:38 -08:00
Ramkumar Ramachandra
de06c13a94 completion: complete format.coverLetter
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-07 09:59:25 -08:00
Ramkumar Ramachandra
c39a2f1178 completion: fix remote.pushdefault
When attempting to complete

  $ git config remote.push<TAB>

'pushdefault' doesn't come up. This is because "$cur" is matched with
"remote.*" and a list of remotes are completed. Add 'pushdefault' as a
candidate for completion too, using __gitcomp_nl_append ().

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-06 09:17:25 -08:00
Ramkumar Ramachandra
422553df49 completion: fix branch.autosetup(merge|rebase)
When attempting to complete

  $ git config branch.auto<TAB>

'autosetupmerge' and 'autosetuprebase' don't come up. This is because
"$cur" is matched with "branch.*" and a list of branches are
completed. Add 'autosetupmerge', 'autosetuprebase' as candidates for
completion too, using __gitcomp_nl_append ().

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-06 09:17:05 -08:00
Ramkumar Ramachandra
f33c2c0f9e completion: introduce __gitcomp_nl_append ()
There are situations where multiple classes of completions possible. For
example

  branch.<TAB>

should try to complete

  branch.master.
  branch.autosetupmerge
  branch.autosetuprebase

The first candidate has the suffix ".", and the second/ third candidates
have the suffix " ". To facilitate completions of this kind, create a
variation of __gitcomp_nl () that appends to the existing list of
completion candidates, COMPREPLY.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-06 09:14:48 -08:00
Ramkumar Ramachandra
d028b8906a zsh completion: find matching custom bash completion
If zsh completion is being read from a location that is different from
system-wide default, it is likely that the user is trying to use a
custom version, perhaps closer to the bleeding edge, installed in her
own directory. We will more likely to find the matching bash completion
script in the same directory than in those system default places.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-01-06 09:14:29 -08:00
Junio C Hamano
694a88a309 Merge branch 'jn/scripts-updates'
* jn/scripts-updates:
  remove #!interpreter line from shell libraries
  test: replace shebangs with descriptions in shell libraries
  test: make FILEMODE a lazy prereq
  contrib: remove git-p4import
  mark contributed hooks executable
  mark perl test scripts executable
  mark Windows build scripts executable
2013-12-12 14:22:59 -08:00
Jonathan Nieder
11d62145b9 remove #!interpreter line from shell libraries
In a shell snippet meant to be sourced by other shell scripts, an
opening #! line does more harm than good.

The harm:

 - When the shell library is sourced, the interpreter and options from
   the #! line are not used.  Specifying a particular shell can
   confuse the reader into thinking it is safe for the shell library
   to rely on idiosyncrasies of that shell.

 - Using #! instead of a plain comment drops a helpful visual clue
   that this is a shell library and not a self-contained script.

 - Tools such as lintian can use a #! line to tell when an
   installation script has failed by forgetting to set a script
   executable.  This check does not work if shell libraries also start
   with a #! line.

The good:

 - Text editors notice the #! line and use it for syntax highlighting
   if you try to edit the installed scripts (without ".sh" suffix) in
   place.

The use of the #! for file type detection is not needed because Git's
shell libraries are meant to be edited in source form (with ".sh"
suffix).  Replace the opening #! lines with comments.

This involves tweaking the test harness's valgrind support to find
shell libraries by looking for "# " in the first line instead of "#!"
(see v1.7.6-rc3~7, 2011-06-17).

Suggested by Russ Allbery through lintian.  Thanks to Jeff King and
Clemens Buchacher for further analysis.

Tested by searching for non-executable scripts with #! line:

	find . -name .git -prune -o -type f -not -executable |
	while read file
	do
		read line <"$file"
		case $line in
		'#!'*)
			echo "$file"
			;;
		esac
	done

The only remaining scripts found are templates for shell scripts
(unimplemented.sh, wrap-for-bin.sh) and sample input used in tests
(t/t4034/perl/{pre,post}).

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-11-26 14:23:56 -08:00
John Keeping
816b2c04c9 peek-remote: remove deprecated alias of ls-remote
This has been deprecated since commit 87194d2 (Deprecate peek-remote,
2007-11-24), included in version 1.5.4.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-11-12 14:10:22 -08:00
John Keeping
7c4012812a lost-found: remove deprecated command
"git lost-found" has been deprecated since commit fc8b5f0 (Deprecate
git-lost-found, 2007-11-08), included in version 1.5.4.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-11-12 14:10:21 -08:00
John Keeping
925ceccf05 tar-tree: remove deprecated command
"git tar-tree" has been a thin wrapper around "git archive" since commit
fd88d9c (Remove upload-tar and make git-tar-tree a thin wrapper to
git-archive, 2006-09-24), which also made it print a message indicating
that git-tar-tree is deprecated.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-11-12 14:10:19 -08:00
John Keeping
eb8e7e1d9a repo-config: remove deprecated alias for "git config"
The release notes for Git 1.5.4 say that "git repo-config" will be
removed in the next feature release.  Since Git 2.0 is nearly here,
remove it.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-11-12 14:10:17 -08:00
Junio C Hamano
9f279af862 Merge branch 'sg/prompt-svn-remote-fix'
Bash portability fix.

* sg/prompt-svn-remote-fix:
  bash prompt: don't use '+=' operator in show upstream code path
2013-10-28 10:43:38 -07:00
SZEDER Gábor
52ec889d1a bash prompt: don't use '+=' operator in show upstream code path
The '+=' operator is not supported by old Bash versions (3.0) we still
care about.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-10-15 14:20:37 -07:00
Julien Carsique
1f6806cf2d git-prompt.sh: optionally show upstream branch name
When working with multiple remotes, it is common to switch the upstream
from a remote to another. Doing so, the prompt may not be the expected
one. Providing an option to display tracking information sounds useful.

Add a "name" option to GIT_PS1_SHOWUPSTREAM which will show the upstream
abbrev name. This option is ignored if "verbose" is false.

Signed-off-by: Julien Carsique <julien.carsique@gmail.com>
Improved-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2013-10-14 10:24:34 -07:00
Stefan Saasen
c5f424fd01 mergetools/diffmerge: support DiffMerge as a git mergetool
DiffMerge is a non-free (but gratis) tool that supports OS X, Windows and Linux.

    See http://www.sourcegear.com/diffmerge/

DiffMerge includes a script `/usr/bin/diffmerge` that can be used to launch the
graphical compare tool.

This change adds mergetool support for DiffMerge and adds 'diffmerge' as an
option to the mergetool help.

Signed-off-by: Stefan Saasen <ssaasen@atlassian.com>
Acked-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
2013-10-13 16:00:57 -07:00
SZEDER Gábor
ea95c7b8f5 completion: improve untracked directory filtering for filename completion
Similar to Bash's default filename completion, our git-aware filename
completion stops at directory boundaries, i.e. it doesn't offer the
full 'path/to/file' at first, but only 'path/'.  To achieve that the
completion script runs 'git ls-files' with specific command line
options to get the list of relevant paths under the current directory,
and then processes each path to strip all but the base directory or
filename (see __git_index_files()).

To offer only modified and untracked files for 'git add' the
completion script runs 'git ls-files --exclude-standard --others
--modified'.  This command lists all non-ignored files in untracked
directories, which leads to a noticeable delay caused by the
processing mentioned above if there are a lot of such files
(__git_index_files() specifies '--exclude-standard' internally):

  $ mkdir untracked-dir
  $ for i in {1..10000} ; do >untracked-dir/$i ; done
  $ time __git_index_files "--others --modified"
  untracked-dir

  real	0m0.537s
  user	0m0.452s
  sys	0m0.160s

Eliminate this delay by additionally passing the '--directory
--no-empty-directory' options to 'git ls-files' to show only the
directory name of non-empty untracked directories instead their whole
content:

  $ time __git_index_files "--others --modified --directory --no-empty-directory"
  untracked-dir

  real	0m0.029s
  user	0m0.020s
  sys	0m0.004s

Filename completion for 'git clean' suffers from the same delay, as it
offers untracked files, too.  The fix could be the same, but since it
actually makes sense to 'git clean' empty directories, in this case we
only pass the '--directory' option to 'git ls-files'.

Reported-by: Isaac Levy <ilevy@google.com>
Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-09-19 13:05:40 -07:00
Brandon Casey
a44aa6930c contrib/git-prompt.sh: handle missing 'printf -v' more gracefully
Old Bash (3.0) which is distributed with RHEL 4.X and other ancient
platforms that are still in wide use, do not have a printf that
supports -v.  Neither does Zsh (which is already handled in the code).

As suggested by Junio, let's test whether printf supports the -v
option and store the result.  Then later, we can use it to
determine whether 'printf -v' can be used, or whether printf
must be called in a subshell.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-08-22 09:50:16 -07:00
Brandon Casey
5d5812f492 git-completion.bash: use correct Bash/Zsh array length syntax
The syntax for retrieving the number of elements in an array is:

   ${#name[@]}

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-08-21 16:38:47 -07:00
Junio C Hamano
d6cbf2fa7a Merge branch 'rj/cygwin-clarify-use-of-cheating-lstat'
Cygwin port added a "not quite correct but a lot faster and good
enough for many lstat() calls that are only used to see if the
working tree entity matches the index entry" lstat() emulation some
time ago, and it started biting us in places.  This removes it and
uses the standard lstat() that comes with Cygwin.

Recent topic that uses lstat on packed-refs file is broken when
this cheating lstat is used, and this is a simplest fix that is
also the cleanest direction to go in the long run.

* rj/cygwin-clarify-use-of-cheating-lstat:
  cygwin: Remove the Win32 l/stat() implementation
2013-08-02 11:01:01 -07:00
Junio C Hamano
1ddc11a6fd Merge branch 'bc/completion-for-bash-3.0'
* bc/completion-for-bash-3.0:
  git-completion.bash: replace zsh notation that breaks bash 3.X
2013-07-30 09:16:37 -07:00
Brandon Casey
e78095c3d0 git-completion.bash: replace zsh notation that breaks bash 3.X
50c5885e (git-completion.bash: replace zsh notation that breaks bash
3.X, 2013-01-18) fixed a zsh-ism introduced earlier to append to an
array, which older versions of bash (3.0) did not grok.  This was
again broken by 734b2f05 (completion: synchronize zsh wrapper,
2013-05-08).

Cherry-pick the fix again to let those with older bash use the
completion script.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-24 08:45:49 -07:00
Junio C Hamano
e683889b75 Merge branch 'es/check-mailmap'
A new command to allow scripts to query the mailmap information.

* es/check-mailmap:
  t4203: test check-mailmap command invocation
  builtin: add git-check-mailmap command
2013-07-22 11:24:14 -07:00
Ramsay Jones
f66450ae94 cygwin: Remove the Win32 l/stat() implementation
Commit adbc0b6b ("cygwin: Use native Win32 API for stat", 30-09-2008)
added a Win32 specific implementation of the stat functions. In order
to handle absolute paths, cygwin mount points and symbolic links, this
implementation may fall back on the standard cygwin l/stat() functions.
Also, the choice of cygwin or Win32 functions is made lazily (by the
first call(s) to l/stat) based on the state of some config variables.

Unfortunately, this "schizophrenic stat" implementation has been the
source of many problems ever since. For example, see commits 7faee6b8,
79748439, 452993c2, 085479e7, b8a97333, 924aaf3e, 05bab3ea and 0117c2f0.

In order to avoid further problems, such as the issue raised by the new
reference handling API, remove the Win32 l/stat() implementation.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-18 10:44:17 -07:00
Eric Sunshine
226ad3482a builtin: add git-check-mailmap command
Introduce command check-mailmap, similar to check-attr and check-ignore,
which allows direct testing of .mailmap configuration.

As plumbing accessible to scripts and other porcelain, check-mailmap
publishes the stable, well-tested .mailmap functionality employed by
built-in Git commands.  Consequently, script authors need not
re-implement .mailmap functionality manually, thus avoiding potential
quirks and behavioral differences.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-13 10:19:37 -07:00
Junio C Hamano
04ce89389d Merge branch 'jk/bash-completion'
* jk/bash-completion:
  completion: learn about --man-path
  completion: handle unstuck form of base git options
2013-07-11 13:05:28 -07:00
Junio C Hamano
46b045917c Merge branch 'ed/color-prompt'
Code clean-up for in-prompt status script (in contrib/).

* ed/color-prompt:
  git-prompt.sh: add missing information in comments
  git-prompt.sh: do not print duplicate clean color code
  t9903: remove redundant tests
  git-prompt.sh: refactor colored prompt code
  t9903: add tests for git-prompt pcmode
2013-07-01 12:41:55 -07:00
John Keeping
66fb37d0c6 completion: learn about --man-path
Signed-off-by: John Keeping <john@keeping.me.uk>
Acked-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-30 15:59:10 -07:00
John Keeping
776009d1b2 completion: handle unstuck form of base git options
git-completion.bash's parsing of the command name relies on everything
preceding it starting with '-' unless it is the "-c" option.  This
allows users to use the stuck form of "--work-tree=<path>" and
"--namespace=<path>" but not the unstuck forms "--work-tree <path>" and
"--namespace <path>".  Fix this.

Similarly, the completion only handles the stuck form "--git-dir=<path>"
and not "--git-dir <path>", so fix this as well.

Signed-off-by: John Keeping <john@keeping.me.uk>
Acked-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-30 15:58:25 -07:00
Eduardo R. D'Avila
cf4cac4cfc git-prompt.sh: add missing information in comments
Mention that the command below is needed for prompt
in ZSH with PS1:
  setopt PROMPT_SUBST

Rephrase some parts that mention only the "current branch name"
being displayed in the prompt. Replace it by stating that
the "repository status" is displayed.

Make it clear that colored prompt is only available
in PROMPT_COMMAND/precmd mode.

With-suggestions-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Eduardo R. D'Avila <erdavila@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 13:03:01 -07:00
Eduardo R. D'Avila
15981f4eec git-prompt.sh: do not print duplicate clean color code
Do not print a duplicate clean color code when there
is no other indicators other than the current branch
in colored prompt.

Acked-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Eduardo R. D'Avila <erdavila@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 13:03:01 -07:00
Eduardo R. D'Avila
7fe9031920 git-prompt.sh: refactor colored prompt code
__git_ps1_colorize_gitstring() sets color codes and
builds the prompt gitstring. It has duplicated code
to handle color codes for bash and zsh shells.
__git_ps1() also has duplicated logic to build the
prompt gitstring.

Remove duplication of logic to build gitstring in
__git_ps1_colorize_gitstring() and __git_ps1().

Leave in __git_ps1_colorize_gitstring() only logic
to set color codes.

Signed-off-by: Eduardo R. D'Avila <erdavila@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 13:02:57 -07:00
SZEDER Gábor
a694258457 bash prompt: mention that PROMPT_COMMAND mode is faster
__git_ps1() is usually added to the prompt inside a command
substitution, imposing the overhead of fork()ing a subshell.  Using
__git_ps1() for $PROMPT_COMMAND is slightly faster, because it avoids
that command substitution.

Mention this in the comments about setting up the git prompt.

The whole series speeds up the bash prompt on Windows/MSysGit
considerably.  Here are some timing results in three scenarios, each
repeated 10 times:

At the top of the work tree, before:

    $ time for i in {0..9} ; do prompt="$(__git_ps1)" ; done

    real    0m1.716s
    user    0m0.301s
    sys     0m0.772s

  After:

    real    0m0.687s
    user    0m0.075s
    sys     0m0.396s

  After, from $PROMPT_COMMAND:

    $ time for i in {0..9} ; do __git_ps1 '\h:\w' '$ ' ; done

    real    0m0.546s
    user    0m0.075s
    sys     0m0.181s

At the top of the work tree, detached head, before:

    real    0m2.574s
    user    0m0.376s
    sys     0m1.207s

  After:

    real    0m1.139s
    user    0m0.151s
    sys     0m0.500s

  After, from $PROMPT_COMMAND:

    real    0m1.030s
    user    0m0.245s
    sys     0m0.336s

In a subdirectory, during rebase, stash status indicator enabled,
before:

    real    0m3.557s
    user    0m0.495s
    sys     0m1.767s

  After:

    real    0m0.717s
    user    0m0.120s
    sys     0m0.300s

  After, from $PROMPT_COMMAND:

    real    0m0.577s
    user    0m0.047s
    sys     0m0.258s

On Linux the speedup ratio is comparable to Windows, but overall it
was about an order of magnitude faster to begin with.  The last case
from above, repeated 100 times, before:

    $ time for i in {0..99} ; do prompt="$(__git_ps1)" ; done

    real    0m2.806s
    user    0m0.180s
    sys     0m0.264s

  After:

    real    0m0.857s
    user    0m0.020s
    sys     0m0.028s

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 18:03:37 +02:00
SZEDER Gábor
69a8141a5d bash prompt: avoid command substitution when finalizing gitstring
Before setting $PS1, __git_ps1() uses a command substitution to
redirect the output from a printf into a variable.  Spare the overhead
of fork()ing a subshell by using 'printf -v <var>' to directly assign
the output to that variable.

zsh's printf doesn't support the '-v <var>' option, so stick with the
command substitution when under zsh.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 18:03:37 +02:00