git diff too slow for a file

diff --git a/builtin-rev-parse.c b/builtin-rev-parse.c
index d14fe20692aa0903f45da96bf9f31f4564b7816a..b76f205e62f29a21fc4b0fedb4a981488ec7cb7f 100644 (file)
--- a/builtin-rev-parse.c
+++ b/builtin-rev-parse.c
@@ -455,6 +455,13 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
        if (argc > 1 && !strcmp("--sq-quote", argv[1]))
                return cmd_sq_quote(argc - 2, argv + 2);
 
+       if (argc == 2 && !strcmp("--local-env-vars", argv[1])) {
+               int i;
+               for (i = 0; local_repo_env[i]; i++)
+                       printf("%s\n", local_repo_env[i]);
+               return 0;
+       }
+
        if (argc > 1 && !strcmp("-h", argv[1]))
                usage(builtin_rev_parse_usage);
 
@@ -604,6 +611,12 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                                for_each_remote_ref(show_reference, NULL);
                                continue;
                        }
+                       if (!strcmp(arg, "--show-toplevel")) {
+                               const char *work_tree = get_git_work_tree();
+                               if (work_tree)
+                                       puts(work_tree);
+                               continue;
+                       }
                        if (!strcmp(arg, "--show-prefix")) {
                                if (prefix)
                                        puts(prefix);