Add support for a "GIT_INDEX_FILE" environment variable.
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.
diff --git a/update-cache.c b/update-cache.c
index 8ec69e2..4353b80 100644
--- a/update-cache.c
+++ b/update-cache.c
@@ -274,25 +274,29 @@
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 @@
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;
}
