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Add git-symbolic-ref

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This adds the counterpart of git-update-ref that lets you read
and create "symbolic refs".  By default it uses a symbolic link
to represent ".git/HEAD -> refs/heads/master", but it can be compiled
to use the textfile symbolic ref.

The places that did 'readlink .git/HEAD' and 'ln -s refs/heads/blah
.git/HEAD' have been converted to use new git-symbolic-ref command, so
that they can deal with either implementation.

Signed-off-by: Junio C Hamano <junio@twinsun.com>
This commit is contained in:
Junio C Hamano
2005-09-30 14:26:57 -07:00
committed by Junio C Hamano
parent a876ed83be
commit 8098a178b2
16 changed files with 175 additions and 56 deletions
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16
setup.c
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@ -76,18 +76,20 @@ const char **get_pathspec(const char *prefix, const char **pathspec)
* Test it it looks like we're at the top
* level git directory. We want to see a
*
* - a HEAD symlink and a refs/ directory under ".git"
* - either a .git/objects/ directory _or_ the proper
* GIT_OBJECT_DIRECTORY environment variable
* - a refs/ directory under ".git"
* - either a HEAD symlink or a HEAD file that is formatted as
* a proper "ref:".
*/
static int is_toplevel_directory(void)
{
struct stat st;
return !lstat(".git/HEAD", &st) &&
S_ISLNK(st.st_mode) &&
!access(".git/refs/", X_OK) &&
(getenv(DB_ENVIRONMENT) || !access(".git/objects/", X_OK));
if (access(".git/refs/", X_OK) ||
access(getenv(DB_ENVIRONMENT) ?
getenv(DB_ENVIRONMENT) : ".git/objects/", X_OK) ||
validate_symref(".git/HEAD"))
return 0;
return 1;
}
const char *setup_git_directory(void)