gvfs-helper: create shared object cache if missing

Users should be allowed to delete their shared cache and have it
recreated on 'git fetch'. This change makes that happen by creating any
leading directories and then creating the directory itself with mkdir().

Signed-off-by: Derrick Stolee <stolee@gmail.com>

Author: derrickstolee

gvfs-helper.c

@@ -1352,13 +1352,16 @@ static int option_parse_shared_cache_directory(const struct option *opt,
 		 */
 		strbuf_addbuf(&gvfs_shared_cache_pathname, &buf_arg);
 
+		/* Attempt to create the directory, in case it doesn't exist. */
+		safe_create_leading_directories(the_repository,
+						gvfs_shared_cache_pathname.buf);
+		mkdir(gvfs_shared_cache_pathname.buf, 0777);
+
 		odb_add_to_alternates_memory(the_repository->objects, buf_arg.buf);
 
 		strbuf_release(&buf_arg);
 		return 0;
-	}
-
-	else {
+	} else {
 		/*
 		 * The requested shared-cache is different from the one
 		 * we inherited.  Replace the inherited value with this
@@ -1371,6 +1374,11 @@ static int option_parse_shared_cache_directory(const struct option *opt,
 		strbuf_setlen(&gvfs_shared_cache_pathname, 0);
 		strbuf_addbuf(&gvfs_shared_cache_pathname, &buf_arg);
 
+		/* Attempt to create the directory, in case it doesn't exist. */
+		safe_create_leading_directories(the_repository,
+						gvfs_shared_cache_pathname.buf);
+		mkdir(gvfs_shared_cache_pathname.buf, 0777);
+
 		odb_add_to_alternates_memory(the_repository->objects, buf_arg.buf);
 
 		/*