Add "git show-ref" builtin command
[git/git.git] / builtin-show-ref.c
CommitLineData
358ddb62
LT
1#include "cache.h"
2#include "refs.h"
3#include "object.h"
4#include "tag.h"
5
6static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--deref] [--tags] [--heads] [--] [pattern*]";
7
8static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0, found_match = 0, verify = 0, quiet = 0;
9static const char **pattern;
10
11static int show_ref(const char *refname, const unsigned char *sha1)
12{
13 struct object *obj;
14
15 if (tags_only || heads_only) {
16 int match;
17
18 match = heads_only && !strncmp(refname, "refs/heads/", 11);
19 match |= tags_only && !strncmp(refname, "refs/tags/", 10);
20 if (!match)
21 return 0;
22 }
23 if (pattern) {
24 int reflen = strlen(refname);
25 const char **p = pattern, *m;
26 while ((m = *p++) != NULL) {
27 int len = strlen(m);
28 if (len > reflen)
29 continue;
30 if (memcmp(m, refname + reflen - len, len))
31 continue;
32 if (len == reflen)
33 goto match;
34 /* "--verify" requires an exact match */
35 if (verify)
36 continue;
37 if (refname[reflen - len - 1] == '/')
38 goto match;
39 }
40 return 0;
41 }
42
43match:
44 found_match++;
45 obj = parse_object(sha1);
46 if (!obj) {
47 if (quiet)
48 return 0;
49 die("git-show-ref: bad ref %s (%s)", refname, sha1_to_hex(sha1));
50 }
51 if (quiet)
52 return 0;
53 printf("%s %s\n", sha1_to_hex(sha1), refname);
54 if (deref_tags && obj->type == OBJ_TAG) {
55 obj = deref_tag(obj, refname, 0);
56 printf("%s %s^{}\n", sha1_to_hex(obj->sha1), refname);
57 }
58 return 0;
59}
60
61int cmd_show_ref(int argc, const char **argv, const char *prefix)
62{
63 int i;
64
65 for (i = 1; i < argc; i++) {
66 const char *arg = argv[i];
67 if (*arg != '-') {
68 pattern = argv + i;
69 break;
70 }
71 if (!strcmp(arg, "--")) {
72 pattern = argv + i + 1;
73 if (!*pattern)
74 pattern = NULL;
75 break;
76 }
77 if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
78 quiet = 1;
79 continue;
80 }
81 if (!strcmp(arg, "-h") || !strcmp(arg, "--head")) {
82 show_head = 1;
83 continue;
84 }
85 if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) {
86 deref_tags = 1;
87 continue;
88 }
89 if (!strcmp(arg, "--verify")) {
90 verify = 1;
91 continue;
92 }
93 if (!strcmp(arg, "--tags")) {
94 tags_only = 1;
95 continue;
96 }
97 if (!strcmp(arg, "--heads")) {
98 heads_only = 1;
99 continue;
100 }
101 usage(show_ref_usage);
102 }
103 if (show_head)
104 head_ref(show_ref);
105 for_each_ref(show_ref);
106 if (!found_match) {
107 if (verify && !quiet)
108 die("No match");
109 return 1;
110 }
111 return 0;
112}