Andrew's git - gitweb.git/blob - builtin-show-ref.c

   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                if (!is_null_sha1(peeled)) {
  71                        hex = find_unique_abbrev(peeled, abbrev);
  72                        printf("%s %s^{}\n", hex, refname);
  73                }
  74        }
  75        else {
  76                obj = parse_object(sha1);
  77                if (!obj)
  78                        die("git-show-ref: bad ref %s (%s)", refname,
  79                            sha1_to_hex(sha1));
  80                if (obj->type == OBJ_TAG) {
  81                        obj = deref_tag(obj, refname, 0);
  82                        hex = find_unique_abbrev(obj->sha1, abbrev);
  83                        printf("%s %s^{}\n", hex, refname);
  84                }
  85        }
  86        return 0;
  87}
  88
  89int cmd_show_ref(int argc, const char **argv, const char *prefix)
  90{
  91        int i;
  92
  93        for (i = 1; i < argc; i++) {
  94                const char *arg = argv[i];
  95                if (*arg != '-') {
  96                        pattern = argv + i;
  97                        break;
  98                }
  99                if (!strcmp(arg, "--")) {
 100                        pattern = argv + i + 1;
 101                        if (!*pattern)
 102                                pattern = NULL;
 103                        break;
 104                }
 105                if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
 106                        quiet = 1;
 107                        continue;
 108                }
 109                if (!strcmp(arg, "-h") || !strcmp(arg, "--head")) {
 110                        show_head = 1;
 111                        continue;
 112                }
 113                if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) {
 114                        deref_tags = 1;
 115                        continue;
 116                }
 117                if (!strcmp(arg, "-s") || !strcmp(arg, "--hash")) {
 118                        hash_only = 1;
 119                        continue;
 120                }
 121                if (!strncmp(arg, "--hash=", 7) ||
 122                    (!strncmp(arg, "--abbrev", 8) &&
 123                     (arg[8] == '=' || arg[8] == '\0'))) {
 124                        if (arg[3] != 'h' && !arg[8])
 125                                /* --abbrev only */
 126                                abbrev = DEFAULT_ABBREV;
 127                        else {
 128                                /* --hash= or --abbrev= */
 129                                char *end;
 130                                if (arg[3] == 'h') {
 131                                        hash_only = 1;
 132                                        arg += 7;
 133                                }
 134                                else
 135                                        arg += 9;
 136                                abbrev = strtoul(arg, &end, 10);
 137                                if (*end || abbrev > 40)
 138                                        usage(show_ref_usage);
 139                                if (abbrev < MINIMUM_ABBREV)
 140                                        abbrev = MINIMUM_ABBREV;
 141                        }
 142                        continue;
 143                }
 144                if (!strcmp(arg, "--verify")) {
 145                        verify = 1;
 146                        continue;
 147                }
 148                if (!strcmp(arg, "--tags")) {
 149                        tags_only = 1;
 150                        continue;
 151                }
 152                if (!strcmp(arg, "--heads")) {
 153                        heads_only = 1;
 154                        continue;
 155                }
 156                usage(show_ref_usage);
 157        }
 158        if (show_head)
 159                head_ref(show_ref, NULL);
 160        for_each_ref(show_ref, NULL);
 161        if (!found_match) {
 162                if (verify && !quiet)
 163                        die("No match");
 164                return 1;
 165        }
 166        return 0;
 167}