Teach receive-pack how to keep pack files based on object count.
[git] / builtin-show-ref.c
1 #include "cache.h"
2 #include "refs.h"
3 #include "object.h"
4 #include "tag.h"
5
6 static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--dereference] [-s|--hash[=<length>]] [--abbrev[=<length>]] [--tags] [--heads] [--] [pattern*]";
7
8 static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0,
9         found_match = 0, verify = 0, quiet = 0, hash_only = 0, abbrev = 0;
10 static const char **pattern;
11
12 static int show_ref(const char *refname, const unsigned char *sha1, int flag, void *cbdata)
13 {
14         struct object *obj;
15         const char *hex;
16
17         if (tags_only || heads_only) {
18                 int match;
19
20                 match = heads_only && !strncmp(refname, "refs/heads/", 11);
21                 match |= tags_only && !strncmp(refname, "refs/tags/", 10);
22                 if (!match)
23                         return 0;
24         }
25         if (pattern) {
26                 int reflen = strlen(refname);
27                 const char **p = pattern, *m;
28                 while ((m = *p++) != NULL) {
29                         int len = strlen(m);
30                         if (len > reflen)
31                                 continue;
32                         if (memcmp(m, refname + reflen - len, len))
33                                 continue;
34                         if (len == reflen)
35                                 goto match;
36                         /* "--verify" requires an exact match */
37                         if (verify)
38                                 continue;
39                         if (refname[reflen - len - 1] == '/')
40                                 goto match;
41                 }
42                 return 0;
43         }
44
45 match:
46         found_match++;
47         obj = parse_object(sha1);
48         if (!obj) {
49                 if (quiet)
50                         return 0;
51                 die("git-show-ref: bad ref %s (%s)", refname, sha1_to_hex(sha1));
52         }
53         if (quiet)
54                 return 0;
55
56         hex = find_unique_abbrev(sha1, abbrev);
57         if (hash_only)
58                 printf("%s\n", hex);
59         else
60                 printf("%s %s\n", hex, refname);
61         if (deref_tags && obj->type == OBJ_TAG) {
62                 obj = deref_tag(obj, refname, 0);
63                 hex = find_unique_abbrev(obj->sha1, abbrev);
64                 printf("%s %s^{}\n", hex, refname);
65         }
66         return 0;
67 }
68
69 int cmd_show_ref(int argc, const char **argv, const char *prefix)
70 {
71         int i;
72
73         for (i = 1; i < argc; i++) {
74                 const char *arg = argv[i];
75                 if (*arg != '-') {
76                         pattern = argv + i;
77                         break;
78                 }
79                 if (!strcmp(arg, "--")) {
80                         pattern = argv + i + 1;
81                         if (!*pattern)
82                                 pattern = NULL;
83                         break;
84                 }
85                 if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
86                         quiet = 1;
87                         continue;
88                 }
89                 if (!strcmp(arg, "-h") || !strcmp(arg, "--head")) {
90                         show_head = 1;
91                         continue;
92                 }
93                 if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) {
94                         deref_tags = 1;
95                         continue;
96                 }
97                 if (!strcmp(arg, "-s") || !strcmp(arg, "--hash")) {
98                         hash_only = 1;
99                         continue;
100                 }
101                 if (!strncmp(arg, "--hash=", 7) ||
102                     (!strncmp(arg, "--abbrev", 8) &&
103                      (arg[8] == '=' || arg[8] == '\0'))) {
104                         if (arg[3] != 'h' && !arg[8])
105                                 /* --abbrev only */
106                                 abbrev = DEFAULT_ABBREV;
107                         else {
108                                 /* --hash= or --abbrev= */
109                                 char *end;
110                                 if (arg[3] == 'h') {
111                                         hash_only = 1;
112                                         arg += 7;
113                                 }
114                                 else
115                                         arg += 9;
116                                 abbrev = strtoul(arg, &end, 10);
117                                 if (*end || abbrev > 40)
118                                         usage(show_ref_usage);
119                                 if (abbrev < MINIMUM_ABBREV)
120                                         abbrev = MINIMUM_ABBREV;
121                         }
122                         continue;
123                 }
124                 if (!strcmp(arg, "--verify")) {
125                         verify = 1;
126                         continue;
127                 }
128                 if (!strcmp(arg, "--tags")) {
129                         tags_only = 1;
130                         continue;
131                 }
132                 if (!strcmp(arg, "--heads")) {
133                         heads_only = 1;
134                         continue;
135                 }
136                 usage(show_ref_usage);
137         }
138         if (show_head)
139                 head_ref(show_ref, NULL);
140         for_each_ref(show_ref, NULL);
141         if (!found_match) {
142                 if (verify && !quiet)
143                         die("No match");
144                 return 1;
145         }
146         return 0;
147 }