builtin / show-ref.con commit Merge branch 'ng/mergetool-lose-final-prompt' (03e904c)
   1#include "builtin.h"
   2#include "cache.h"
   3#include "refs.h"
   4#include "object-store.h"
   5#include "object.h"
   6#include "tag.h"
   7#include "string-list.h"
   8#include "parse-options.h"
   9
  10static const char * const show_ref_usage[] = {
  11        N_("git show-ref [-q | --quiet] [--verify] [--head] [-d | --dereference] [-s | --hash[=<n>]] [--abbrev[=<n>]] [--tags] [--heads] [--] [<pattern>...]"),
  12        N_("git show-ref --exclude-existing[=<pattern>]"),
  13        NULL
  14};
  15
  16static int deref_tags, show_head, tags_only, heads_only, found_match, verify,
  17           quiet, hash_only, abbrev, exclude_arg;
  18static const char **pattern;
  19static const char *exclude_existing_arg;
  20
  21static void show_one(const char *refname, const struct object_id *oid)
  22{
  23        const char *hex;
  24        struct object_id peeled;
  25
  26        if (!has_sha1_file(oid->hash))
  27                die("git show-ref: bad ref %s (%s)", refname,
  28                    oid_to_hex(oid));
  29
  30        if (quiet)
  31                return;
  32
  33        hex = find_unique_abbrev(oid, abbrev);
  34        if (hash_only)
  35                printf("%s\n", hex);
  36        else
  37                printf("%s %s\n", hex, refname);
  38
  39        if (!deref_tags)
  40                return;
  41
  42        if (!peel_ref(refname, &peeled)) {
  43                hex = find_unique_abbrev(&peeled, abbrev);
  44                printf("%s %s^{}\n", hex, refname);
  45        }
  46}
  47
  48static int show_ref(const char *refname, const struct object_id *oid,
  49                    int flag, void *cbdata)
  50{
  51        if (show_head && !strcmp(refname, "HEAD"))
  52                goto match;
  53
  54        if (tags_only || heads_only) {
  55                int match;
  56
  57                match = heads_only && starts_with(refname, "refs/heads/");
  58                match |= tags_only && starts_with(refname, "refs/tags/");
  59                if (!match)
  60                        return 0;
  61        }
  62        if (pattern) {
  63                int reflen = strlen(refname);
  64                const char **p = pattern, *m;
  65                while ((m = *p++) != NULL) {
  66                        int len = strlen(m);
  67                        if (len > reflen)
  68                                continue;
  69                        if (memcmp(m, refname + reflen - len, len))
  70                                continue;
  71                        if (len == reflen)
  72                                goto match;
  73                        if (refname[reflen - len - 1] == '/')
  74                                goto match;
  75                }
  76                return 0;
  77        }
  78
  79match:
  80        found_match++;
  81
  82        show_one(refname, oid);
  83
  84        return 0;
  85}
  86
  87static int add_existing(const char *refname, const struct object_id *oid,
  88                        int flag, void *cbdata)
  89{
  90        struct string_list *list = (struct string_list *)cbdata;
  91        string_list_insert(list, refname);
  92        return 0;
  93}
  94
  95/*
  96 * read "^(?:<anything>\s)?<refname>(?:\^\{\})?$" from the standard input,
  97 * and
  98 * (1) strip "^{}" at the end of line if any;
  99 * (2) ignore if match is provided and does not head-match refname;
 100 * (3) warn if refname is not a well-formed refname and skip;
 101 * (4) ignore if refname is a ref that exists in the local repository;
 102 * (5) otherwise output the line.
 103 */
 104static int exclude_existing(const char *match)
 105{
 106        static struct string_list existing_refs = STRING_LIST_INIT_DUP;
 107        char buf[1024];
 108        int matchlen = match ? strlen(match) : 0;
 109
 110        for_each_ref(add_existing, &existing_refs);
 111        while (fgets(buf, sizeof(buf), stdin)) {
 112                char *ref;
 113                int len = strlen(buf);
 114
 115                if (len > 0 && buf[len - 1] == '\n')
 116                        buf[--len] = '\0';
 117                if (3 <= len && !strcmp(buf + len - 3, "^{}")) {
 118                        len -= 3;
 119                        buf[len] = '\0';
 120                }
 121                for (ref = buf + len; buf < ref; ref--)
 122                        if (isspace(ref[-1]))
 123                                break;
 124                if (match) {
 125                        int reflen = buf + len - ref;
 126                        if (reflen < matchlen)
 127                                continue;
 128                        if (strncmp(ref, match, matchlen))
 129                                continue;
 130                }
 131                if (check_refname_format(ref, 0)) {
 132                        warning("ref '%s' ignored", ref);
 133                        continue;
 134                }
 135                if (!string_list_has_string(&existing_refs, ref)) {
 136                        printf("%s\n", buf);
 137                }
 138        }
 139        return 0;
 140}
 141
 142static int hash_callback(const struct option *opt, const char *arg, int unset)
 143{
 144        hash_only = 1;
 145        /* Use full length SHA1 if no argument */
 146        if (!arg)
 147                return 0;
 148        return parse_opt_abbrev_cb(opt, arg, unset);
 149}
 150
 151static int exclude_existing_callback(const struct option *opt, const char *arg,
 152                                     int unset)
 153{
 154        exclude_arg = 1;
 155        *(const char **)opt->value = arg;
 156        return 0;
 157}
 158
 159static const struct option show_ref_options[] = {
 160        OPT_BOOL(0, "tags", &tags_only, N_("only show tags (can be combined with heads)")),
 161        OPT_BOOL(0, "heads", &heads_only, N_("only show heads (can be combined with tags)")),
 162        OPT_BOOL(0, "verify", &verify, N_("stricter reference checking, "
 163                    "requires exact ref path")),
 164        OPT_HIDDEN_BOOL('h', NULL, &show_head,
 165                        N_("show the HEAD reference, even if it would be filtered out")),
 166        OPT_BOOL(0, "head", &show_head,
 167          N_("show the HEAD reference, even if it would be filtered out")),
 168        OPT_BOOL('d', "dereference", &deref_tags,
 169                    N_("dereference tags into object IDs")),
 170        { OPTION_CALLBACK, 's', "hash", &abbrev, N_("n"),
 171          N_("only show SHA1 hash using <n> digits"),
 172          PARSE_OPT_OPTARG, &hash_callback },
 173        OPT__ABBREV(&abbrev),
 174        OPT__QUIET(&quiet,
 175                   N_("do not print results to stdout (useful with --verify)")),
 176        { OPTION_CALLBACK, 0, "exclude-existing", &exclude_existing_arg,
 177          N_("pattern"), N_("show refs from stdin that aren't in local repository"),
 178          PARSE_OPT_OPTARG | PARSE_OPT_NONEG, exclude_existing_callback },
 179        OPT_END()
 180};
 181
 182int cmd_show_ref(int argc, const char **argv, const char *prefix)
 183{
 184        argc = parse_options(argc, argv, prefix, show_ref_options,
 185                             show_ref_usage, 0);
 186
 187        if (exclude_arg)
 188                return exclude_existing(exclude_existing_arg);
 189
 190        pattern = argv;
 191        if (!*pattern)
 192                pattern = NULL;
 193
 194        if (verify) {
 195                if (!pattern)
 196                        die("--verify requires a reference");
 197                while (*pattern) {
 198                        struct object_id oid;
 199
 200                        if ((starts_with(*pattern, "refs/") || !strcmp(*pattern, "HEAD")) &&
 201                            !read_ref(*pattern, &oid)) {
 202                                show_one(*pattern, &oid);
 203                        }
 204                        else if (!quiet)
 205                                die("'%s' - not a valid ref", *pattern);
 206                        else
 207                                return 1;
 208                        pattern++;
 209                }
 210                return 0;
 211        }
 212
 213        if (show_head)
 214                head_ref(show_ref, NULL);
 215        for_each_ref(show_ref, NULL);
 216        if (!found_match) {
 217                if (verify && !quiet)
 218                        die("No match");
 219                return 1;
 220        }
 221        return 0;
 222}