Remove redundant bit clears from diff_setup()

diff --git a/builtin-tag.c b/builtin-tag.c
index a3984998915921476a80839a07b133779ece72f3..01e73747d02f384c5e31b846340a4b586c84aab3 100644 (file)
--- a/builtin-tag.c
+++ b/builtin-tag.c
@@ -26,6 +26,7 @@ static char signingkey[1000];
 struct tag_filter {
        const char *pattern;
        int lines;
+       struct commit_list *with_commit;
 };
 
 #define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
@@ -42,6 +43,16 @@ static int show_reference(const char *refname, const unsigned char *sha1,
                char *buf, *sp, *eol;
                size_t len;
 
+               if (filter->with_commit) {
+                       struct commit *commit;
+
+                       commit = lookup_commit_reference_gently(sha1, 1);
+                       if (!commit)
+                               return 0;
+                       if (!is_descendant_of(commit, filter->with_commit))
+                               return 0;
+               }
+
                if (!filter->lines) {
                        printf("%s\n", refname);
                        return 0;
@@ -79,7 +90,8 @@ static int show_reference(const char *refname, const unsigned char *sha1,
        return 0;
 }
 
-static int list_tags(const char *pattern, int lines)
+static int list_tags(const char *pattern, int lines,
+                       struct commit_list *with_commit)
 {
        struct tag_filter filter;
 
@@ -88,6 +100,7 @@ static int list_tags(const char *pattern, int lines)
 
        filter.pattern = pattern;
        filter.lines = lines;
+       filter.with_commit = with_commit;
 
        for_each_tag_ref(show_reference, (void *) &filter);
 
@@ -360,6 +373,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                list = 0, delete = 0, verify = 0;
        const char *msgfile = NULL, *keyid = NULL;
        struct msg_arg msg = { 0, STRBUF_INIT };
+       struct commit_list *with_commit = NULL;
        struct option options[] = {
                OPT_BOOLEAN('l', NULL, &list, "list tag names"),
                { OPTION_INTEGER, 'n', NULL, &lines, NULL,
@@ -378,6 +392,14 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
                OPT_STRING('u', NULL, &keyid, "key-id",
                                        "use another key to sign the tag"),
                OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
+
+               OPT_GROUP("Tag listing options"),
+               {
+                       OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
+                       "print only tags that contain the commit",
+                       PARSE_OPT_LASTARG_DEFAULT,
+                       parse_opt_with_commit, (intptr_t)"HEAD",
+               },
                OPT_END()
        };
 
@@ -402,9 +424,12 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
        if (list + delete + verify > 1)
                usage_with_options(git_tag_usage, options);
        if (list)
-               return list_tags(argv[0], lines == -1 ? 0 : lines);
+               return list_tags(argv[0], lines == -1 ? 0 : lines,
+                                with_commit);
        if (lines != -1)
                die("-n option is only allowed with -l.");
+       if (with_commit)
+               die("--contains option is only allowed with -l.");
        if (delete)
                return for_each_tag_name(argv, delete_tag);
        if (verify)