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git: run in a directory given with -C option 

This is similar in spirit to "make -C dir ..." and "tar -C dir ...".

It takes more keypresses to invoke git command in a different
directory without leaving the current directory:

    1. (cd ~/foo && git status)
       git --git-dir=~/foo/.git --work-dir=~/foo status
       GIT_DIR=~/foo/.git GIT_WORK_TREE=~/foo git status
    2. (cd ../..; git grep foo)
    3. for d in d1 d2 d3; do (cd $d && git svn rebase); done

The methods shown above are acceptable for scripting but are too
cumbersome for quick command line invocations.

With this new option, the above can be done with fewer keystrokes:

    1. git -C ~/foo status
    2. git -C ../.. grep foo
    3. for d in d1 d2 d3; do git -C $d svn rebase; done

A new test script is added to verify the behavior of this option with
other path-related options like --git-dir and --work-tree.

Signed-off-by: Nazri Ramliy <ayiehere@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nazri Ramliy 2013-09-09 21:47:43 +08:00 committed by Junio C Hamano
parent e230c568c4
commit 44e1e4d67d
3 changed files with 109 additions and 2 deletions
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16
Documentation/git.txt
View File

@ -9,7 +9,7 @@ git - the stupid content tracker
SYNOPSIS
--------
[verse]
'git' [--version] [--help] [-c <name>=<value>]
'git' [--version] [--help] [-C <path>] [-c <name>=<value>]
[--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
[-p|--paginate|--no-pager] [--no-replace-objects] [--bare]
[--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
@ -395,6 +395,20 @@ displayed. See linkgit:git-help[1] for more information,
because `git --help ...` is converted internally into `git
help ...`.
-C <path>::
Run as if git was started in '<path>' instead of the current working
directory. When multiple `-C` options are given, each subsequent
non-absolute `-C <path>` is interpreted relative to the preceding `-C
<path>`.
+
This option affects options that expect path name like `--git-dir` and
`--work-tree` in that their interpretations of the path names would be
made relative to the working directory caused by the `-C` option. For
example the following invocations are equivalent:
git --git-dir=a.git --work-tree=b -C c status
git --git-dir=c/a.git --work-tree=c/b status
-c <name>=<value>::
Pass a configuration parameter to the command. The value
given will override values from configuration files.

13
git.c
View File

@ -7,7 +7,7 @@
#include "commit.h"
const char git_usage_string[] =
"git [--version] [--help] [-c name=value]\n"
"git [--version] [--help] [-C <path>] [-c name=value]\n"
" [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]\n"
" [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]\n"
" [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]\n"
@ -153,6 +153,17 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
set_alternate_shallow_file((*argv)[0]);
if (envchanged)
*envchanged = 1;
} else if (!strcmp(cmd, "-C")) {
if (*argc < 2) {
fprintf(stderr, "No directory given for -C.\n" );
usage(git_usage_string);
}
if (chdir((*argv)[1]))
die_errno("Cannot change to '%s'", (*argv)[1]);
if (envchanged)
*envchanged = 1;
(*argv)++;
(*argc)--;
} else {
fprintf(stderr, "Unknown option: %s\n", cmd);
usage(git_usage_string);

82
t/t0056-git-C.sh Executable file
View File

@ -0,0 +1,82 @@
#!/bin/sh
test_description='"-C <path>" option and its effects on other path-related options'
. ./test-lib.sh
test_expect_success '"git -C <path>" runs git from the directory <path>' '
test_create_repo dir1 &&
echo 1 >dir1/a.txt &&
(cd dir1 && git add a.txt && git commit -m "initial in dir1") &&
echo "initial in dir1" >expected &&
git -C dir1 log --format=%s >actual &&
test_cmp expected actual
'
test_expect_success 'Multiple -C options: "-C dir1 -C dir2" is equivalent to "-C dir1/dir2"' '
test_create_repo dir1/dir2 &&
echo 1 >dir1/dir2/a.txt &&
git -C dir1/dir2 add a.txt &&
echo "initial in dir1/dir2" >expected &&
git -C dir1/dir2 commit -m "initial in dir1/dir2" &&
git -C dir1 -C dir2 log --format=%s >actual &&
test_cmp expected actual
'
test_expect_success 'Effect on --git-dir option: "-C c --git-dir=a.git" is equivalent to "--git-dir c/a.git"' '
mkdir c &&
mkdir c/a &&
mkdir c/a.git &&
(cd c/a.git && git init --bare) &&
echo 1 >c/a/a.txt &&
git --git-dir c/a.git --work-tree=c/a add a.txt &&
git --git-dir c/a.git --work-tree=c/a commit -m "initial" &&
git --git-dir=c/a.git log -1 --format=%s >expected &&
git -C c --git-dir=a.git log -1 --format=%s >actual &&
test_cmp expected actual
'
test_expect_success 'Order should not matter: "--git-dir=a.git -C c" is equivalent to "-C c --git-dir=a.git"' '
git -C c --git-dir=a.git log -1 --format=%s >expected &&
git --git-dir=a.git -C c log -1 --format=%s >actual &&
test_cmp expected actual
'
test_expect_success 'Effect on --work-tree option: "-C c/a.git --work-tree=../a" is equivalent to "--work-tree=c/a --git-dir=c/a.git"' '
rm c/a/a.txt &&
git --git-dir=c/a.git --work-tree=c/a status >expected &&
git -C c/a.git --work-tree=../a status >actual &&
test_cmp expected actual
'
test_expect_success 'Order should not matter: "--work-tree=../a -C c/a.git" is equivalent to "-C c/a.git --work-tree=../a"' '
git -C c/a.git --work-tree=../a status >expected &&
git --work-tree=../a -C c/a.git status >actual &&
test_cmp expected actual
'
test_expect_success 'Effect on --git-dir and --work-tree options - "-C c --git-dir=a.git --work-tree=a" is equivalent to "--git-dir=c/a.git --work-tree=c/a"' '
git --git-dir=c/a.git --work-tree=c/a status >expected &&
git -C c --git-dir=a.git --work-tree=a status >actual &&
test_cmp expected actual
'
test_expect_success 'Order should not matter: "-C c --git-dir=a.git --work-tree=a" is equivalent to "--git-dir=a.git -C c --work-tree=a"' '
git -C c --git-dir=a.git --work-tree=a status >expected &&
git --git-dir=a.git -C c --work-tree=a status >actual &&
test_cmp expected actual
'
test_expect_success 'Order should not matter: "-C c --git-dir=a.git --work-tree=a" is equivalent to "--git-dir=a.git --work-tree=a -C c"' '
git -C c --git-dir=a.git --work-tree=a status >expected &&
git --git-dir=a.git --work-tree=a -C c status >actual &&
test_cmp expected actual
'
test_expect_success 'Relative followed by fullpath: "-C ./here -C /there" is equivalent to "-C /there"' '
echo "initial in dir1/dir2" >expected &&
git -C dir1 -C "$(pwd)/dir1/dir2" log --format=%s >actual &&
test_cmp expected actual
'
test_done