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Author SHA1 Message Date
Jiang Xin
db627fd568 test: add t7301 for git-clean--interactive
Add test cases for git-clean--interactive.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
c0be6b4c8a git-clean: add documentation for interactive git-clean
Add new section "Interactive mode" for documentation of interactive
git-clean.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
96a799b6d1 git-clean: add ask each interactive action
Add a new action for interactive git-clean: ask each. It's just like
the "rm -i" command, that the user must confirm one by one for each
file or directory to be cleaned.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
c1f1d24aa5 git-clean: add select by numbers interactive action
Draw a multiple choice menu using `list_and_choose` to select items
to be deleted by numbers.

User can input:

 *  1,5-7 : select 1,5,6,7 items to be deleted
 *  *     : select all items to be deleted
 *  -*    : unselect all, nothing will be deleted
 *        : (empty) finish selecting, and return back to main menu

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
d1239264f2 git-clean: add filter by pattern interactive action
Add a new action for interactive git-clean: filter by pattern. When the
user chooses this action, user can input space-separated patterns (the
same syntax as gitignore), and each clean candidate that matches with
one of the patterns will be excluded from cleaning. When the user feels
it's OK, presses ENTER and backs to the confirmation dialog.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
9f93e4611f git-clean: use a git-add-interactive compatible UI
Rewrite menu using a new method `list_and_choose`, which is borrowed
from `git-add--interactive.perl`. We will use this framework to add
new actions for interactive git-clean later.

Please NOTE:

 * Method `list_and_choose` return an array of integers, and
 * it is up to you to free the allocated memory of the array.
 * The array ends with EOF.
 * If user pressed CTRL-D (i.e. EOF), no selection returned.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
7a9b0b802e git-clean: add colors to interactive git-clean
Show header, help, error messages, and prompt in colors for interactive
git-clean. Re-use config variables, such as "color.interactive" and
"color.interactive.<slot>" for command `git-add--interactive`.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Comments-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
1b8fd46732 git-clean: show items of del_list in columns
When there are lots of items to be cleaned, it is hard to see them all
in one screen. Show them in columns will solve this problem.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Comments-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
1769600208 git-clean: add support for -i/--interactive
Show what would be done and the user must confirm before actually
cleaning.

    Would remove ...
    Would remove ...
    Would remove ...

    Remove [y/n]?

Press "y" to start cleaning, and press "n" if you want to abort.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
396049e5fb git-clean: refactor git-clean into two phases
Before introducing interactive git-clean, refactor git-clean operations
into two phases:

 * hold cleaning items in del_list,
 * and remove them in a separate loop at the end.

We will introduce interactive git-clean between the two phases. The
interactive git-clean will show what would be done and must confirm
before do real cleaning.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:25:11 -07:00
Jiang Xin
e9a820cefd write_name{_quoted_relative,}(): remove redundant parameters
After substitute path_relative() in quote.c with relative_path()
from path.c, parameters (such as len and prefix_len) are redundant
in function write_name() and write_name_quoted_relative().  The
callers have already been audited that the strings they pass are
properly NUL terminated and the length they give are the length of
the string (or -1 that asks the length to be counted by the callee).

Remove these now-redundant parameters.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:22:06 -07:00
Jiang Xin
39598f9983 quote_path_relative(): remove redundant parameter
quote_path_relative() used to take a counted string as its parameter
(the string to be quoted).  With an earlier change, it now uses
relative_path() that does not take a counted string, and we have
been passing only the pointer to the string since then.

Remove the length parameter from quote_path_relative() to show that
this parameter was redundant.  All the changed lines show that the
caller passed either -1 (to ask the function run strlen() on the
string), or the length of the string, so the earlier conversion was
safe.

All the callers of quote_path_relative() that used to take counted string
have been audited to make sure that they are passing length of the actual
string (or -1 to ask the callee run strlen())

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:16:48 -07:00
Jiang Xin
ad66df2df1 quote.c: substitute path_relative with relative_path
Substitute the function path_relative in quote.c with the function
relative_path. Function relative_path can be treated as an enhanced
and more robust version of path_relative.

Outputs of path_relative and it's replacement (relative_path) are the
same for the following cases:

    path      prefix     output of path_relative  output of relative_path
    ========  =========  =======================  =======================
    /a/b/c/   /a/b/      c/                       c/
    /a/b/c    /a/b/      c                        c
    /a/       /a/b/      ../                      ../
    /         /a/b/      ../../                   ../../
    /a/c      /a/b/      ../c                     ../c
    /x/y      /a/b/      ../../x/y                ../../x/y
    a/b/c/    a/b/       c/                       c/
    a/        a/b/       ../                      ../
    x/y       a/b/       ../../x/y                ../../x/y
    /a/b      (empty)    /a/b                     /a/b
    /a/b      (null)     /a/b                     /a/b
    a/b       (empty)    a/b                      a/b
    a/b       (null)     a/b                      a/b

But if both of the path and the prefix are the same, or the returned
relative path should be the current directory, the outputs of both
functions are different. Function relative_path returns "./", while
function path_relative returns empty string.

    path      prefix     output of path_relative  output of relative_path
    ========  =========  =======================  =======================
    /a/b/     /a/b/      (empty)                  ./
    a/b/      a/b/       (empty)                  ./
    (empty)   (null)     (empty)                  ./
    (empty)   (empty)    (empty)                  ./

But the callers of path_relative can handle such cases, or never
encounter this issue at all, because:

 * In function quote_path_relative, if the output of path_relative is
   empty, append "./" to it, like:

       if (!out->len)
           strbuf_addstr(out, "./");

 * Another caller is write_name_quoted_relative, which is only used
   by builtin/ls-files.c. git-ls-files only show files, so path of
   files will never be identical with the prefix of a directory.

The following differences show that path_relative does not handle
extra slashes properly:

    path      prefix     output of path_relative  output of relative_path
    ========  =========  =======================  =======================
    /a//b//c/ //a/b//    ../../../../a//b//c/     c/
    a/b//c    a//b       ../b//c                  c

And if prefix has no trailing slash, path_relative does not work
properly either.  But since prefix always has a trailing slash, it's
not a problem.

    path      prefix     output of path_relative  output of relative_path
    ========  =========  =======================  =======================
    /a/b/c/   /a/b       b/c/                     c/
    /a/b      /a/b       b                        ./
    /a/b/     /a/b       b/                       ./
    /a        /a/b/      ../../a                  ../
    a/b/c/    a/b        b/c/                     c/
    a/b/      a/b        b/                       ./
    a         a/b        ../a                     ../
    x/y       a/b/       ../x/y                   ../../x/y
    a/c       a/b        c                        ../c
    /a/       /a/b       (empty)                  ../
    (empty)   /a/b       ../../                   ./

One tricky part in this conversion is write_name() function in
ls-files.c.  It takes a counted string, <name, len>, that is to be
made relative to <prefix, prefix_len> and then quoted.  Because
write_name_quoted_relative() still takes these two parameters as
counted string, but ignores the count and treat these two as
NUL-terminated strings, this conversion needs to be audited for its
callers:

 - For <name, len>, all three callers of write_name() passes a
   NUL-terminated string and its true length, so this patch makes
   "len" unused.

 - For <prefix, prefix_len>, prefix could be a string that is longer
   than empty while prefix_len could be 0 when "--full-name" option
   is used.  This is fixed by checking prefix_len in write_name()
   and calling write_name_quoted_relative() with NULL when
   prefix_len is set to 0.  Again, this makes "prefix_len" given to
   write_name_quoted_relative() unused, without introducing a bug.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 11:13:50 -07:00
Jiang Xin
e02ca72f70 path.c: refactor relative_path(), not only strip prefix
Original design of relative_path() is simple, just strip the prefix
(*base) from the absolute path (*abs).

In most cases, we need a real relative path, such as: ../foo,
../../bar.  That's why there is another reimplementation
(path_relative()) in quote.c.

Borrow some codes from path_relative() in quote.c to refactor
relative_path() in path.c, so that it could return real relative
path, and user can reuse this function without reimplementing
his/her own.  The function path_relative() in quote.c will be
substituted, and I would use the new relative_path() function when
implementing the interactive git-clean later.

Different results for relative_path() before and after this refactor:

    abs path  base path  relative (original)  relative (refactor)
    ========  =========  ===================  ===================
    /a/b      /a/b       .                    ./
    /a/b/     /a/b       .                    ./
    /a        /a/b/      /a                   ../
    /         /a/b/      /                    ../../
    /a/c      /a/b/      /a/c                 ../c
    /x/y      /a/b/      /x/y                 ../../x/y

    a/b/      a/b/       .                    ./
    a/b/      a/b        .                    ./
    a         a/b        a                    ../
    x/y       a/b/       x/y                  ../../x/y
    a/c       a/b        a/c                  ../c

    (empty)   (null)     (empty)              ./
    (empty)   (empty)    (empty)              ./
    (empty)   /a/b       (empty)              ./
    (null)    (null)     (null)               ./
    (null)    (empty)    (null)               ./
    (null)    /a/b       (segfault)           ./

You may notice that return value "." has been changed to "./".
It is because:

 * Function quote_path_relative() in quote.c will show the relative
   path as "./" if abs(in) and base(prefix) are the same.

 * Function relative_path() is called only once (in setup.c), and
   it will be OK for the return value as "./" instead of ".".

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 09:59:00 -07:00
Jiang Xin
203439b284 test: add test cases for relative_path
Add subcommand "relative_path" in test-path-utils, and add test cases
in t0060.

Johannes tested an earlier version of this patch on Windows, and
found that some relative_path tests should be skipped on
Windows. This is because the bash on Windows rewrites arguments of
regular Windows programs, such as git and the test helpers, if the
arguments look like absolute POSIX paths. As a consequence, the
actual tests performed are not what the tests scripts expect.

The tests that need *not* be skipped are those where the two paths passed
to 'test-path-utils relative_path' have the same prefix and the result is
expected to be a relative path. This is because the rewriting changes
"/a/b" to "D:/Src/MSysGit/a/b", and when both inputs are extended the same
way, this just cancels out in the relative path computation.

Signed-off-by: Jiang Xin <worldhello.net@gmail.com>
Helped-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 09:30:26 -07:00
Ramkumar Ramachandra
5e62cc14c3 column doc: rewrite documentation for column.ui
The configuration option column.ui is very poorly documented, and it is
unclear what the defaults are, and what option can be combined with
what.  Rewrite it by splitting up the options into three sections
clearly showing how COL_ENABLED, COL_LAYOUT_MASK, and COL_DENSE work.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-26 08:51:43 -07:00
Stefan Beller
15dd5ffb54 .mailmap: Map "H.Merijn Brand" to "H. Merijn Brand"
This patch was created by searching for duplicates of email addresses
in the shortlog by
    git shortlog -sne |awk '{ print $NF }' |sort |uniq -d

This will yield all email addresses, which are found multiple times within
the shortlog. We can assume that commiters having the same email address
are indeed the same person.

Signed-off-by: Stefan Beller <stefanbeller@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-25 15:18:43 -07:00
Junio C Hamano
5430bb283b diff: demote core.safecrlf=true to core.safecrlf=warn
Otherwise the user will not be able to start to guess where in the
contents in the working tree the offending unsafe CR lies.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-25 13:55:03 -07:00
Junio C Hamano
9832cb9d4d Update draft release notes to 1.8.4
For now, comment out the description on two "git status" UI
configuration, until the reverted topic can be resurrected.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-24 13:53:56 -07:00
Junio C Hamano
76689ab83b Merge branch 'rr/am-quit-empty-then-abort-fix'
Recent "rebase --autostash" update made it impossible to recover
with "git am --abort" from a repository where "git am" without mbox
was run by mistake and then was killed with "^C".

* rr/am-quit-empty-then-abort-fix:
  t/am: use test_path_is_missing() where appropriate
  am: handle stray $dotest directory
2013-06-24 13:49:00 -07:00
Junio C Hamano
001d116054 Merge branch 'rt/cherry-pick-continue-advice-in-status'
* rt/cherry-pick-continue-advice-in-status:
  wt-status: give better advice when cherry-pick is in progress
2013-06-24 13:48:57 -07:00
Junio C Hamano
869577e5fe Merge branch 'nk/config-local-doc'
* nk/config-local-doc:
  config: Add description of --local option
2013-06-24 13:48:55 -07:00
Junio C Hamano
6f37238747 Merge branch 'jk/mergetool-lib-refactor'
Code cleanup.

* jk/mergetool-lib-refactor:
  mergetool--lib: refactor {diff,merge}_cmd logic
2013-06-24 13:48:53 -07:00
Junio C Hamano
c47d4380c7 Merge branch 'jk/doc-build-move-infordir-def'
Makefile cleanup.

* jk/doc-build-move-infordir-def:
  Documentation/Makefile: move infodir to be with other '*dir's
  Documentation/Makefile: fix spaces around assignments
2013-06-24 13:48:52 -07:00
Junio C Hamano
515cded0fb Merge branch 'fg/submodule-fixup'
Code cleanup.

* fg/submodule-fixup:
  git-submodule.sh: remove duplicate call to set_rev_name
2013-06-24 13:48:50 -07:00
Junio C Hamano
9f19e0c310 Merge branch 'dk/version-gen-gitdir'
Allow packaging a tarball in a working tree with $GIT_DIR set elsewhere.

* dk/version-gen-gitdir:
  GIT-VERSION-GEN: support non-standard $GIT_DIR path
2013-06-24 13:48:49 -07:00
Junio C Hamano
9a3f5986f7 Merge branch 'dk/maint-t5150-dirname'
Fix a test script.

* dk/maint-t5150-dirname:
  tests: allow sha1's as part of the path
2013-06-24 13:48:47 -07:00
Junio C Hamano
bd21822572 Merge branch 'rs/unpack-trees-tree-walk-conflict-field'
Code clean-up.

* rs/unpack-trees-tree-walk-conflict-field:
  unpack-trees: don't shift conflicts left and right
2013-06-24 13:48:44 -07:00
Junio C Hamano
bc918acf70 Merge branch 'rr/rebase-sha1-by-string-query'
Allow various commit objects to be given to "git rebase" by ':/look
for this string' syntax, e.g. "git rebase --onto ':/there'".

* rr/rebase-sha1-by-string-query:
  rebase: use peel_committish() where appropriate
  sh-setup: add new peel_committish() helper
  t/rebase: add failing tests for a peculiar revision
2013-06-24 13:48:40 -07:00
Junio C Hamano
8d8975aca7 Merge branch 'mm/rm-coalesce-errors'
Give a single message followed by list of paths from "git rm" to
report multiple paths that cannot be removed.

* mm/rm-coalesce-errors:
  rm: introduce advice.rmHints to shorten messages
  rm: better error message on failure for multiple files
2013-06-24 13:48:35 -07:00
Junio C Hamano
22d94a72b3 Merge branch 'jh/libify-note-handling'
Make it possible to call into copy-notes API from the sequencer code.

* jh/libify-note-handling:
  Move create_notes_commit() from notes-merge.c into notes-utils.c
  Move copy_note_for_rewrite + friends from builtin/notes.c to notes-utils.c
  finish_copy_notes_for_rewrite(): Let caller provide commit message
2013-06-24 13:48:30 -07:00
Junio C Hamano
0039d60c3f Merge branch 'fc/sequencer-plug-leak'
Plug a small leak in an error codepath.

* fc/sequencer-plug-leak:
  sequencer: avoid leaking message buffer when refusing to create an empty commit
  sequencer: remove useless indentation
2013-06-24 13:48:28 -07:00
Junio C Hamano
84b4202d80 status/commit: make sure --porcelain is not affected by user-facing config
The recent addition of status.branch started affecting what is shown
when "git status --porcelain" is run by mistake.  Identify the
configuration items that should be ignored under "--porcelain"
option, introduce a "deferred config" mechanism to keep the values
read from the configuration, and decide what value to use only after
we read both from configuration and command line.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-24 12:49:53 -07:00
Ramkumar Ramachandra
f0915cbaf4 commit: make it work with status.short
With "status.short" set, it is now impossible to commit with
status.short set, because it acts like "git commit --short", and it
is impossible to differentiate between a status_format set by the
command-line option parser versus that set by the config parser.

To alleviate this problem, clear status_format as soon as the config
parser has finished its work.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-24 10:25:49 -07:00
Jorge Juan Garcia Garcia
ec85d0700f status: introduce status.branch to enable --branch by default
Some people often run 'git status -b'.
The config variable status.branch allows to set it by default.

Signed-off-by: Jorge Juan Garcia Garcia <Jorge-Juan.Garcia-Garcia@ensimag.imag.fr>
Signed-off-by: Mathieu Lienard--Mayor <Mathieu.Lienard--Mayor@ensimag.imag.fr>
Reviewed-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-24 10:25:49 -07:00
Jorge Juan Garcia Garcia
4fb5166ab5 status: introduce status.short to enable --short by default
Some people always run 'git status -s'.
The configuration variable status.short allows to set it by default.

Signed-off-by: Jorge Juan Garcia Garcia <Jorge-Juan.Garcia-Garcia@ensimag.imag.fr>
Signed-off-by: Mathieu Lienard--Mayor <Mathieu.Lienard--Mayor@ensimag.imag.fr>
Reviewed-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-24 10:25:49 -07:00
Ramkumar Ramachandra
6e1696b7c4 t/t5528-push-default: test pushdefault workflows
Introduce test_pushdefault_workflows(), and test that all push.default
modes work with central and triangular workflows as expected.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-24 10:19:25 -07:00
Ramkumar Ramachandra
396243fa47 t/t5528-push-default: generalize test_push_*
The setup creates two bare repositories: repo1 and repo2, but
test_push_commit() hard-codes checking in repo1 for the actual output.
Generalize it and its caller, test_push_success(), to optionally accept
a third argument to specify the name of the repository to check for
actual output.  We will use this in the next patch.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-24 10:18:41 -07:00
Ramkumar Ramachandra
ed2b18292b push: change simple to accommodate triangular workflows
When remote.pushdefault or branch.<name>.pushremote is set to a
remote that is different from where you usually fetch from (i.e. a
triangular workflow), master@{u} != origin, and push.default is set
to `upstream` or `simple` would fail with this error:

  $ git push
  fatal: You are pushing to remote 'origin', which is not the upstream of
  your current branch 'master', without telling me what to push
  to update which remote branch.

The very name of "upstream" indicates that it is only suitable for
use in central workflows; let us not even attempt to give it a new
meaning in triangular workflows, and error out as before.

However, the `simple` does not have to share this error.  It is
poised to be the default for Git 2.0, and we would like it to do
something sensible in triangular workflows.

Redefine "simple" as "safer upstream" for centralized workflow as
before, but work as "current" for triangular workflow.

We may want to make it "safer current", but that is a separate
issue.

Reported-by: Leandro Lucarella <leandro.lucarella@sociomantic.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-24 10:16:49 -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
SZEDER Gábor
14d7649748 bash prompt: avoid command substitution when checking for untracked files
When enabled, the bash prompt can indicate the presence of untracked
files with a '%' sign.  __git_ps1() checks for untracked files by running the
'$(git ls-files --others --exclude-standard)' command substitution,
and displays the indicator when there is no output.

Avoid this command substitution by additionally passing
'--error-unmatch *', and checking the command's return value.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 18:03:37 +02:00
SZEDER Gábor
dd0b72cbd9 bash prompt: use bash builtins to check stash state
When the environment variable $GIT_PS1_SHOWSTASHSTATE is set
__git_ps1() checks the presence of stashes by running 'git rev-parse
--verify refs/stash'.  This command not only checks that the
'refs/stash' ref exists but also, well, verifies that it's a valid
ref.

However, we don't need to be that thorough for the bash prompt.  We
can omit that verification and only check whether 'refs/stash' exists
or not.  Since 'git pack-refs' never packs 'refs/stash', it's a matter
of checking the existence of a ref file.  Perform this check using
only bash builtins to spare the overhead of fork()+exec()ing a git
process.

Also run 'git pack-refs --all' in the corresponding test to document
that the prompt script depends on 'git pack-refs' not packing
'refs/stash' and to catch possible breakages should this behavior ever
change.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 18:03:37 +02:00
SZEDER Gábor
0f37c12581 bash prompt: use bash builtins to check for unborn branch for dirty state
When the dirty work tree and index status indicator is enabled,
__git_ps1() checks for changes in the index by running 'git diff-index
--cached --quiet HEAD --' and looking at its exit code.  However, that
makes sense only when HEAD points to a valid commit: on an unborn
branch the failure of said command would be caused by the invalid
HEAD, not by changes in the index.  Therefore, __git_ps1() first
checks for a valid HEAD by running 'git rev-parse --quiet --verify
HEAD'.

Since the previous patch we implicitly check HEAD's validity by
running 'git rev-parse ... --short HEAD', making the dirty status
indicator's 'git rev-parse' check redundant.  It's sufficient to check
for non-emptyness of the variable holding the abbreviated commit
object name, thereby sparing the overhead of fork()+exec()ing a git
process.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 18:03:37 +02:00
SZEDER Gábor
e3e0b9378b bash prompt: combine 'git rev-parse' for detached head
When describing a detached HEAD according to the $GIT_PS1_DESCRIBE
environment variable fails, __git_ps1() now runs the '$(git rev-parse
--short HEAD)' command substitution to get the abbreviated detached
HEAD commit object name.  This imposes the overhead of fork()ing a
subshell and fork()+exec()ing a git process.

Avoid this overhead by combining this command substitution with the
"main" 'git rev-parse' execution for getting the path to the .git
directory & co.  This means that we'll look for the abbreviated commit
object name even when it's not necessary, because we're on a branch or
the detached HEAD can be described.  It doesn't matter, however,
because once 'git rev-parse' is up and running to fulfill all those
other queries, the additional overhead of looking for the abbreviated
commit object name is not measurable because it's lost in the noise.

There is a caveat, however, when we are on an unborn branch, because
in that case HEAD doesn't point to a valid commit, hence the query for
the abbreviated commit object name fails.  Therefore, '--short HEAD'
must be the last options to 'git rev-parse' in order to get all the
other necessary information for the prompt even on an unborn branch.
Furthermore, in that case, and in that case only, 'git rev-parse'
doesn't output the last line containing the abbreviated commit object
name, obviously, so we have to take care to only parse it if 'git
rev-parse' exited without any error.

Although there are tests already excercising __git_ps1() on unborn
branches, they all do so implicitly.  Add a test that checks this
explicitly.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 18:03:30 +02:00
SZEDER Gábor
efaa0c1532 bash prompt: combine 'git rev-parse' executions in the main code path
There are a couple of '$(git rev-parse --<opt>)' command substitutions
in __git_ps1() and three of them are executed in the main code path:

 - the first to get the path to the .git directory ('--git-dir'),
 - the second to check whether we're inside the .git directory
   ('--is-inside-git-dir'),
 - and the last, depending on the results of the second, either
   * to check whether it's a bare repo ('--is-bare-repository'), or
   * to check whether inside a work tree ('--is-inside-work-tree').

Naturally, this imposes the overhead of fork()ing three subshells and
fork()+exec()ing three git commands.

Combine these four 'git rev-parse' queries into a single one and use
bash parameter expansions to parse the combined output, i.e. to
separate the path to the .git directory from the true/false of
'--is-inside-git-dir', etc.  This way we can eliminate two of the
three subshells and git commands.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 17:22:10 +02:00
SZEDER Gábor
3a43c4b5bd bash prompt: use bash builtins to find out current branch
__git_ps1() runs the '$(git symbolic-ref HEAD)' command substitution
to find out whether we are on a branch and to find out the name of
that branch.  This imposes the overhead of fork()ing a subshell and
fork()+exec()ing a git process.

Since HEAD is in most cases a single-line file and the symbolic ref
format is quite simple to recognize and parse, read and parse it using
only bash builtins, thereby sparing all that fork()+exec() overhead.
Don't display the git prompt if reading HEAD fails, because a readable
HEAD is required for a git repository.  HEAD can also be a symlink
symbolic ref (due to 'core.preferSymlinkRefs'), so use bash builtins
for reading HEAD only when HEAD is not a symlink.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 17:22:10 +02:00
SZEDER Gábor
b91b935f04 bash prompt: use bash builtins to find out rebase state
During an ongoing interactive rebase __git_ps1() finds out the name of
the rebased branch, the total number of patches and the number of the
current patch by executing a '$(cat .git/rebase-merge/<FILE>)' command
substitution for each.  That is not quite the most efficient way to
read single line single word files, because it imposes the overhead of
fork()ing a subshell and fork()+exec()ing 'cat' several times.

Use the 'read' bash builtin instead to avoid those overheads.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 17:22:09 +02:00
SZEDER Gábor
511ad15904 bash prompt: run 'git rev-parse --git-dir' directly instead of __gitdir()
__git_ps1() finds out the path to the repository by using the
__gitdir() helper function.  __gitdir() is basically just a wrapper
around 'git rev-parse --git-dir', extended with support for
recognizing a remote repository given as argument, to use the path
given on the command line, and with a few shortcuts to recognize a git
repository in cwd or at $GIT_DIR quickly without actually running 'git
rev-parse'.  However, the former two is only necessary for the
completion script but makes no sense for the bash prompt, while the
latter shortcuts are performance optimizations __git_ps1() can do
without (they just avoid the overhead of fork()+exec()ing a git
process).

Run 'git rev-parse --git-dir' directly in __git_ps1(), because it will
allow this patch series to combine several $(git rev-parse ...)
command substitutions in the main code path, and the overall
performance benefit will far outweigh the loss of those few shortcuts
in __gitdir().  Furthermore, since __gitdir() is not needed anymore
for the prompt, remove it from the prompt script finally eliminating
its duplication between the prompt and completion scripts.  Also
remove the comment from the completion script warning about this code
duplication.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 17:22:09 +02:00
SZEDER Gábor
96ea404757 bash prompt: return early from __git_ps1() when not in a git repository
... to gain one level of indentation for the bulk of the function.

(The patch looks quite unreadable, you'd better check it with 'git
diff -w'.)

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
2013-06-24 17:22:09 +02:00