Andrew's git - gitweb.git/blob

9ae3d08546c74a579e9bb13285424290b4449d4d
   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|--dereference] [-s|--hash[=<length>]] [--abbrev[=<length>]] [--tags] [--heads] [--] [pattern*]";
   7
   8static 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;
  10static const char **pattern;
  11
  12static int show_ref(const char *refname, const unsigned char *sha1, int flag, void *cbdata)
  13{
  14        struct object *obj;
  15        const char *hex;
  16        unsigned char peeled[20];
  17
  18        if (tags_only || heads_only) {
  19                int match;
  20
  21                match = heads_only && !strncmp(refname, "refs/heads/", 11);
  22                match |= tags_only && !strncmp(refname, "refs/tags/", 10);
  23                if (!match)
  24                        return 0;
  25        }
  26        if (pattern) {
  27                int reflen = strlen(refname);
  28                const char **p = pattern, *m;
  29                while ((m = *p++) != NULL) {
  30                        int len = strlen(m);
  31                        if (len > reflen)
  32                                continue;
  33                        if (memcmp(m, refname + reflen - len, len))
  34                                continue;
  35                        if (len == reflen)
  36                                goto match;
  37                        /* "--verify" requires an exact match */
  38                        if (verify)
  39                                continue;
  40                        if (refname[reflen - len - 1] == '/')
  41                                goto match;
  42                }
  43                return 0;
  44        }
  45
  46match:
  47        found_match++;
  48
  49        /* This changes the semantics slightly that even under quiet we
  50         * detect and return error if the repository is corrupt and
  51         * ref points at a nonexistent object.
  52         */
  53        if (!has_sha1_file(sha1))
  54                die("git-show-ref: bad ref %s (%s)", refname,
  55                    sha1_to_hex(sha1));
  56
  57        if (quiet)
  58                return 0;
  59
  60        hex = find_unique_abbrev(sha1, abbrev);
  61        if (hash_only)
  62                printf("%s\n", hex);
  63        else
  64                printf("%s %s\n", hex, refname);
  65
  66        if (!deref_tags)
  67                return 0;
  68
  69        if ((flag & REF_ISPACKED) && !peel_ref(refname, peeled)) {
  70                hex = find_unique_abbrev(peeled, abbrev);
  71                printf("%s %s^{}\n", hex, refname);
  72        }
  73        else {
  74                obj = parse_object(sha1);
  75                if (!obj)
  76                        die("git-show-ref: bad ref %s (%s)", refname,
  77                            sha1_to_hex(sha1));
  78                if (obj->type == OBJ_TAG) {
  79                        obj = deref_tag(obj, refname, 0);
  80                        hex = find_unique_abbrev(obj->sha1, abbrev);
  81                        printf("%s %s^{}\n", hex, refname);
  82                }
  83        }
  84        return 0;
  85}
  86
  87int cmd_show_ref(int argc, const char **argv, const char *prefix)
  88{
  89        int i;
  90
  91        for (i = 1; i < argc; i++) {
  92                const char *arg = argv[i];
  93                if (*arg != '-') {
  94                        pattern = argv + i;
  95                        break;
  96                }
  97                if (!strcmp(arg, "--")) {
  98                        pattern = argv + i + 1;
  99                        if (!*pattern)
 100                                pattern = NULL;
 101                        break;
 102                }
 103                if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
 104                        quiet = 1;
 105                        continue;
 106                }
 107                if (!strcmp(arg, "-h") || !strcmp(arg, "--head")) {
 108                        show_head = 1;
 109                        continue;
 110                }
 111                if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) {
 112                        deref_tags = 1;
 113                        continue;
 114                }
 115                if (!strcmp(arg, "-s") || !strcmp(arg, "--hash")) {
 116                        hash_only = 1;
 117                        continue;
 118                }
 119                if (!strncmp(arg, "--hash=", 7) ||
 120                    (!strncmp(arg, "--abbrev", 8) &&
 121                     (arg[8] == '=' || arg[8] == '\0'))) {
 122                        if (arg[3] != 'h' && !arg[8])
 123                                /* --abbrev only */
 124                                abbrev = DEFAULT_ABBREV;
 125                        else {
 126                                /* --hash= or --abbrev= */
 127                                char *end;
 128                                if (arg[3] == 'h') {
 129                                        hash_only = 1;
 130                                        arg += 7;
 131                                }
 132                                else
 133                                        arg += 9;
 134                                abbrev = strtoul(arg, &end, 10);
 135                                if (*end || abbrev > 40)
 136                                        usage(show_ref_usage);
 137                                if (abbrev < MINIMUM_ABBREV)
 138                                        abbrev = MINIMUM_ABBREV;
 139                        }
 140                        continue;
 141                }
 142                if (!strcmp(arg, "--verify")) {
 143                        verify = 1;
 144                        continue;
 145                }
 146                if (!strcmp(arg, "--tags")) {
 147                        tags_only = 1;
 148                        continue;
 149                }
 150                if (!strcmp(arg, "--heads")) {
 151                        heads_only = 1;
 152                        continue;
 153                }
 154                usage(show_ref_usage);
 155        }
 156        if (show_head)
 157                head_ref(show_ref, NULL);
 158        for_each_ref(show_ref, NULL);
 159        if (!found_match) {
 160                if (verify && !quiet)
 161                        die("No match");
 162                return 1;
 163        }
 164        return 0;
 165}