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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
read-tree.c
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@ -79,12 +79,12 @@ static int read_tree(unsigned char *sha1, const char *base, int baselen)
return read_tree_recursive(buffer, "tree", size, base, baselen);
}
static int remove_lock = 0;
static char *lockfile_name;
static void remove_lock_file(void)
{
if (remove_lock)
unlink(".git/index.lock");
if (lockfile_name)
unlink(lockfile_name);
}
static int path_matches(struct cache_entry *a, struct cache_entry *b)
@ -223,12 +223,16 @@ int main(int argc, char **argv)
{
int i, newfd, merge;
unsigned char sha1[20];
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;
merge = 0;
for (i = 1; i < argc; i++) {
@ -268,9 +272,8 @@ int main(int argc, char **argv)
die("just how do you expect me to merge %d trees?", stage-1);
}
}
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 index file");
remove_lock = 0;
lockfile_name = NULL;
return 0;
}