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Add support for a "GIT_INDEX_FILE" environment variable.

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We use that to specify alternative index files, which can be useful
if you want to (for example) generate a temporary index file to do
some specific operation that you don't want to mess with your main
one with.

It defaults to the regular ".git/index" if it hasn't been specified.
This commit is contained in:
Linus Torvalds
2005-04-21 10:55:18 -07:00
parent 65bb49144d
commit bb233d690a
6 changed files with 31 additions and 20 deletions
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19
update-cache.c
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@ -274,25 +274,29 @@ static int add_cacheinfo(char *arg1, char *arg2, char *arg3)
return add_cache_entry(ce, allow_add);
}
static int remove_lock = 0;
static const char *lockfile_name = NULL;
static void remove_lock_file(void)
{
if (remove_lock)
unlink(".git/index.lock");
if (lockfile_name)
unlink(lockfile_name);
}
int main(int argc, char **argv)
{
int i, newfd, entries;
int allow_options = 1;
static char lockfile[MAXPATHLEN+1];
const char *indexfile = get_index_file();
newfd = open(".git/index.lock", O_RDWR | O_CREAT | O_EXCL, 0600);
snprintf(lockfile, sizeof(lockfile), "%s.lock", indexfile);
newfd = open(lockfile, O_RDWR | O_CREAT | O_EXCL, 0600);
if (newfd < 0)
die("unable to create new cachefile");
atexit(remove_lock_file);
remove_lock = 1;
lockfile_name = lockfile;
entries = read_cache();
if (entries < 0)
@ -333,10 +337,9 @@ int main(int argc, char **argv)
if (add_file_to_cache(path))
die("Unable to add %s to database", path);
}
if (write_cache(newfd, active_cache, active_nr) ||
rename(".git/index.lock", ".git/index"))
if (write_cache(newfd, active_cache, active_nr) || rename(lockfile, indexfile))
die("Unable to write new cachefile");
remove_lock = 0;
lockfile_name = NULL;
return 0;
}