This filters the list for annotated|signed tags of the given object.
Example,
john$ git tag -s v1.0-john v1.0
john$ git tag -l --points-at v1.0
v1.0-john
Signed-off-by: Tom Grennan <tmgrennan@xxxxxxxxx>
---
Documentation/git-tag.txt | 5 +++-
builtin/tag.c | 59 ++++++++++++++++++++++++++++++++++++++-------
2 files changed, 54 insertions(+), 10 deletions(-)
diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt
index 53ff5f6..b9ec75c 100644
--- a/Documentation/git-tag.txt
+++ b/Documentation/git-tag.txt
@@ -12,7 +12,7 @@ SYNOPSIS
'git tag' [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>]
<tagname> [<commit> | <object>]
'git tag' -d <tagname>...
-'git tag' [-n[<num>]] -l [--contains <commit>] [<pattern>...]
+'git tag' [-n[<num>]] -l [--contains <commit>] [--points-at <object>] [<pattern>...]
'git tag' -v <tagname>...
DESCRIPTION
@@ -86,6 +86,9 @@ OPTIONS
--contains <commit>::
Only list tags which contain the specified commit.
+--points-at <object>::
+ Only list annotated or signed tags of the given object.
+
-m <msg>::
--message=<msg>::
Use the given tag message (instead of prompting).
diff --git a/builtin/tag.c b/builtin/tag.c
index 31f02e8..7568d6c 100644
--- a/builtin/tag.c
+++ b/builtin/tag.c
@@ -19,7 +19,8 @@
static const char * const git_tag_usage[] = {
"git tag [-a|-s|-u <key-id>] [-f] [-m <msg>|-F <file>] <tagname> [<head>]",
"git tag -d <tagname>...",
- "git tag -l [-n[<num>]] [<pattern>...]",
+ "git tag -l [-n[<num>]] [<pattern>...] \\\n\t\t"
+ "[--contains <commit>] [--points-at <object>]",
"git tag -v <tagname>...",
NULL
};
@@ -28,6 +29,7 @@ struct tag_filter {
const char **patterns;
int lines;
struct commit_list *with_commit;
+ const unsigned char *points_at;
};
static int match_pattern(const char **patterns, const char *ref)
@@ -105,16 +107,28 @@ static int show_reference(const char *refname, const unsigned char *sha1,
return 0;
}
+ buf = read_sha1_file(sha1, &type, &size);
+ if (!buf || !size)
+ return 0;
+
+ if (filter->points_at) {
+ unsigned char tagged_sha1[20];
+ if (memcmp("object ", buf, 7) \
+ || buf[47] != '\n' \
+ || get_sha1_hex(buf + 7, tagged_sha1) \
+ || memcmp(filter->points_at, tagged_sha1, 20)) {
+ free(buf);
+ return 0;
+ }
+ }
+
if (!filter->lines) {
printf("%s\n", refname);
+ free(buf);
return 0;
}
printf("%-15s ", refname);
- buf = read_sha1_file(sha1, &type, &size);
- if (!buf || !size)
- return 0;
-
/* skip header */
sp = strstr(buf, "\n\n");
if (!sp) {
@@ -143,16 +157,20 @@ static int show_reference(const char *refname, const unsigned char *sha1,
}
static int list_tags(const char **patterns, int lines,
- struct commit_list *with_commit)
+ struct commit_list *with_commit,
+ unsigned char *points_at)
{
struct tag_filter filter;
filter.patterns = patterns;
filter.lines = lines;
filter.with_commit = with_commit;
+ filter.points_at = points_at;
for_each_tag_ref(show_reference, (void *) &filter);
+ if (points_at)
+ free(points_at);
return 0;
}
@@ -375,12 +393,28 @@ static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
return check_refname_format(sb->buf, 0);
}
+int parse_opt_points_at(const struct option *opt, const char *arg, int unset)
+{
+ unsigned char *sha1;
+
+ if (!arg)
+ return -1;
+ sha1 = xmalloc(20);
+ if (get_sha1(arg, sha1)) {
+ free(sha1);
+ return error("malformed object name %s", arg);
+ }
+ *(unsigned char **)opt->value = sha1;
+ return 0;
+}
+
int cmd_tag(int argc, const char **argv, const char *prefix)
{
struct strbuf buf = STRBUF_INIT;
struct strbuf ref = STRBUF_INIT;
unsigned char object[20], prev[20];
const char *object_ref, *tag;
+ unsigned char *points_at;
struct ref_lock *lock;
struct create_tag_options opt;
char *cleanup_arg = NULL;
@@ -417,6 +451,12 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
PARSE_OPT_LASTARG_DEFAULT,
parse_opt_with_commit, (intptr_t)"HEAD",
},
+ {
+ OPTION_CALLBACK, 0, "points-at", &points_at, "object",
+ "print only annotated|signed tags of the object",
+ PARSE_OPT_LASTARG_DEFAULT,
+ parse_opt_points_at, (intptr_t)"HEAD",
+ },
OPT_END()
};
@@ -443,11 +483,12 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
usage_with_options(git_tag_usage, options);
if (list)
return list_tags(argv, lines == -1 ? 0 : lines,
- with_commit);
+ with_commit, points_at);
if (lines != -1)
die(_("-n option is only allowed with -l."));
- if (with_commit)
- die(_("--contains option is only allowed with -l."));
+ if (with_commit || points_at)
+ die(_("--contains and --points-at options "
+ "are only allowed with -l."));
if (delete)
return for_each_tag_name(argv, delete_tag);
if (verify)
--
1.7.8
--
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