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git: treat "git -C '<path>'" as a no-op when <path> is empty 

'git -C ""' unhelpfully dies with error "Cannot change to ''",
whereas the shell treats `cd ""' as a no-op.  Taking the shell's
behavior as a precedent, teach git to treat `-C ""' as a no-op, as
well.

Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Karthik Nayak 2015-03-06 16:48:08 +05:30 committed by Junio C Hamano
parent 9874fca712
commit 6a536e2076
2 changed files with 16 additions and 4 deletions
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10
git.c
View File

@ -204,10 +204,12 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
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;
if ((*argv)[1][0]) {
if (chdir((*argv)[1]))
die_errno("Cannot change to '%s'", (*argv)[1]);
if (envchanged)
*envchanged = 1;
}
(*argv)++;
(*argc)--;
} else {

10
t/t0056-git-C.sh
View File

@ -14,6 +14,16 @@ test_expect_success '"git -C <path>" runs git from the directory <path>' '
test_cmp expected actual
'
test_expect_success '"git -C <path>" with an empty <path> is a no-op' '
(
mkdir -p dir1/subdir &&
cd dir1/subdir &&
git -C "" rev-parse --show-prefix >actual &&
echo subdir/ >expect &&
test_cmp expect 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/b.txt &&