regex: use regexec_buf()

diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index cf8487b3b95fcca9a8a96a1562646ee8ddd5b354..c961b74c5aaae41153b89f4e877437ba7f0d70c7 100644 (file)
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -505,6 +505,7 @@ N_("git rev-parse --parseopt [<options>] -- [<args>...]\n"
 int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 {
        int i, as_is = 0, verify = 0, quiet = 0, revs_count = 0, type = 0;
+       int did_repo_setup = 0;
        int has_dashdash = 0;
        int output_prefix = 0;
        unsigned char sha1[20];
@@ -528,11 +529,40 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                }
        }
 
-       prefix = setup_git_directory();
-       git_config(git_default_config, NULL);
+       /* No options; just report on whether we're in a git repo or not. */
+       if (argc == 1) {
+               setup_git_directory();
+               git_config(git_default_config, NULL);
+               return 0;
+       }
+
        for (i = 1; i < argc; i++) {
                const char *arg = argv[i];
 
+               if (!strcmp(arg, "--local-env-vars")) {
+                       int i;
+                       for (i = 0; local_repo_env[i]; i++)
+                               printf("%s\n", local_repo_env[i]);
+                       continue;
+               }
+               if (!strcmp(arg, "--resolve-git-dir")) {
+                       const char *gitdir = argv[++i];
+                       if (!gitdir)
+                               die("--resolve-git-dir requires an argument");
+                       gitdir = resolve_gitdir(gitdir);
+                       if (!gitdir)
+                               die("not a gitdir '%s'", argv[i]);
+                       puts(gitdir);
+                       continue;
+               }
+
+               /* The rest of the options require a git repository. */
+               if (!did_repo_setup) {
+                       prefix = setup_git_directory();
+                       git_config(git_default_config, NULL);
+                       did_repo_setup = 1;
+               }
+
                if (!strcmp(arg, "--git-path")) {
                        if (!argv[i + 1])
                                die("--git-path requires an argument");
@@ -706,12 +736,6 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                                add_ref_exclusion(&ref_excludes, arg + 10);
                                continue;
                        }
-                       if (!strcmp(arg, "--local-env-vars")) {
-                               int i;
-                               for (i = 0; local_repo_env[i]; i++)
-                                       printf("%s\n", local_repo_env[i]);
-                               continue;
-                       }
                        if (!strcmp(arg, "--show-toplevel")) {
                                const char *work_tree = get_git_work_tree();
                                if (work_tree)
@@ -767,16 +791,6 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
                                puts(prefix_filename(pfx, strlen(pfx), get_git_common_dir()));
                                continue;
                        }
-                       if (!strcmp(arg, "--resolve-git-dir")) {
-                               const char *gitdir = argv[++i];
-                               if (!gitdir)
-                                       die("--resolve-git-dir requires an argument");
-                               gitdir = resolve_gitdir(gitdir);
-                               if (!gitdir)
-                                       die("not a gitdir '%s'", argv[i]);
-                               puts(gitdir);
-                               continue;
-                       }
                        if (!strcmp(arg, "--is-inside-git-dir")) {
                                printf("%s\n", is_inside_git_dir() ? "true"
                                                : "false");