Andrew's git - gitweb.git/blob - builtin-name-rev.c

   1#include "builtin.h"
   2#include "cache.h"
   3#include "commit.h"
   4#include "tag.h"
   5#include "refs.h"
   6
   7static const char name_rev_usage[] =
   8        "git-name-rev [--tags | --refs=<pattern>] ( --all | --stdin | committish [committish...] )\n";
   9
  10typedef struct rev_name {
  11        const char *tip_name;
  12        int merge_traversals;
  13        int generation;
  14} rev_name;
  15
  16static long cutoff = LONG_MAX;
  17
  18static void name_rev(struct commit *commit,
  19                const char *tip_name, int merge_traversals, int generation,
  20                int deref)
  21{
  22        struct rev_name *name = (struct rev_name *)commit->util;
  23        struct commit_list *parents;
  24        int parent_number = 1;
  25
  26        if (!commit->object.parsed)
  27                parse_commit(commit);
  28
  29        if (commit->date < cutoff)
  30                return;
  31
  32        if (deref) {
  33                char *new_name = xmalloc(strlen(tip_name)+3);
  34                strcpy(new_name, tip_name);
  35                strcat(new_name, "^0");
  36                tip_name = new_name;
  37
  38                if (generation)
  39                        die("generation: %d, but deref?", generation);
  40        }
  41
  42        if (name == NULL) {
  43                name = xmalloc(sizeof(rev_name));
  44                commit->util = name;
  45                goto copy_data;
  46        } else if (name->merge_traversals > merge_traversals ||
  47                        (name->merge_traversals == merge_traversals &&
  48                         name->generation > generation)) {
  49copy_data:
  50                name->tip_name = tip_name;
  51                name->merge_traversals = merge_traversals;
  52                name->generation = generation;
  53        } else
  54                return;
  55
  56        for (parents = commit->parents;
  57                        parents;
  58                        parents = parents->next, parent_number++) {
  59                if (parent_number > 1) {
  60                        char *new_name = xmalloc(strlen(tip_name)+8);
  61
  62                        if (generation > 0)
  63                                sprintf(new_name, "%s~%d^%d", tip_name,
  64                                                generation, parent_number);
  65                        else
  66                                sprintf(new_name, "%s^%d", tip_name, parent_number);
  67
  68                        name_rev(parents->item, new_name,
  69                                merge_traversals + 1 , 0, 0);
  70                } else {
  71                        name_rev(parents->item, tip_name, merge_traversals,
  72                                generation + 1, 0);
  73                }
  74        }
  75}
  76
  77struct name_ref_data {
  78        int tags_only;
  79        const char *ref_filter;
  80};
  81
  82static int name_ref(const char *path, const unsigned char *sha1, int flags, void *cb_data)
  83{
  84        struct object *o = parse_object(sha1);
  85        struct name_ref_data *data = cb_data;
  86        int deref = 0;
  87
  88        if (data->tags_only && strncmp(path, "refs/tags/", 10))
  89                return 0;
  90
  91        if (data->ref_filter && fnmatch(data->ref_filter, path, 0))
  92                return 0;
  93
  94        while (o && o->type == OBJ_TAG) {
  95                struct tag *t = (struct tag *) o;
  96                if (!t->tagged)
  97                        break; /* broken repository */
  98                o = parse_object(t->tagged->sha1);
  99                deref = 1;
 100        }
 101        if (o && o->type == OBJ_COMMIT) {
 102                struct commit *commit = (struct commit *)o;
 103
 104                if (!strncmp(path, "refs/heads/", 11))
 105                        path = path + 11;
 106                else if (!strncmp(path, "refs/", 5))
 107                        path = path + 5;
 108
 109                name_rev(commit, xstrdup(path), 0, 0, deref);
 110        }
 111        return 0;
 112}
 113
 114/* returns a static buffer */
 115static const char* get_rev_name(struct object *o)
 116{
 117        static char buffer[1024];
 118        struct rev_name *n;
 119        struct commit *c;
 120
 121        if (o->type != OBJ_COMMIT)
 122                return "undefined";
 123        c = (struct commit *) o;
 124        n = c->util;
 125        if (!n)
 126                return "undefined";
 127
 128        if (!n->generation)
 129                return n->tip_name;
 130
 131        snprintf(buffer, sizeof(buffer), "%s~%d", n->tip_name, n->generation);
 132
 133        return buffer;
 134}
 135
 136int cmd_name_rev(int argc, const char **argv, const char *prefix)
 137{
 138        struct object_array revs = { 0, 0, NULL };
 139        int as_is = 0, all = 0, transform_stdin = 0;
 140        struct name_ref_data data = { 0, NULL };
 141
 142        git_config(git_default_config);
 143
 144        if (argc < 2)
 145                usage(name_rev_usage);
 146
 147        for (--argc, ++argv; argc; --argc, ++argv) {
 148                unsigned char sha1[20];
 149                struct object *o;
 150                struct commit *commit;
 151
 152                if (!as_is && (*argv)[0] == '-') {
 153                        if (!strcmp(*argv, "--")) {
 154                                as_is = 1;
 155                                continue;
 156                        } else if (!strcmp(*argv, "--tags")) {
 157                                data.tags_only = 1;
 158                                continue;
 159                        } else  if (!strncmp(*argv, "--refs=", 7)) {
 160                                data.ref_filter = *argv + 7;
 161                                continue;
 162                        } else if (!strcmp(*argv, "--all")) {
 163                                if (argc > 1)
 164                                        die("Specify either a list, or --all, not both!");
 165                                all = 1;
 166                                cutoff = 0;
 167                                continue;
 168                        } else if (!strcmp(*argv, "--stdin")) {
 169                                if (argc > 1)
 170                                        die("Specify either a list, or --stdin, not both!");
 171                                transform_stdin = 1;
 172                                cutoff = 0;
 173                                continue;
 174                        }
 175                        usage(name_rev_usage);
 176                }
 177
 178                if (get_sha1(*argv, sha1)) {
 179                        fprintf(stderr, "Could not get sha1 for %s. Skipping.\n",
 180                                        *argv);
 181                        continue;
 182                }
 183
 184                o = deref_tag(parse_object(sha1), *argv, 0);
 185                if (!o || o->type != OBJ_COMMIT) {
 186                        fprintf(stderr, "Could not get commit for %s. Skipping.\n",
 187                                        *argv);
 188                        continue;
 189                }
 190
 191                commit = (struct commit *)o;
 192
 193                if (cutoff > commit->date)
 194                        cutoff = commit->date;
 195
 196                add_object_array((struct object *)commit, *argv, &revs);
 197        }
 198
 199        for_each_ref(name_ref, &data);
 200
 201        if (transform_stdin) {
 202                char buffer[2048];
 203                char *p, *p_start;
 204
 205                while (!feof(stdin)) {
 206                        int forty = 0;
 207                        p = fgets(buffer, sizeof(buffer), stdin);
 208                        if (!p)
 209                                break;
 210
 211                        for (p_start = p; *p; p++) {
 212#define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f'))
 213                                if (!ishex(*p))
 214                                        forty = 0;
 215                                else if (++forty == 40 &&
 216                                                !ishex(*(p+1))) {
 217                                        unsigned char sha1[40];
 218                                        const char *name = "undefined";
 219                                        char c = *(p+1);
 220
 221                                        forty = 0;
 222
 223                                        *(p+1) = 0;
 224                                        if (!get_sha1(p - 39, sha1)) {
 225                                                struct object *o =
 226                                                        lookup_object(sha1);
 227                                                if (o)
 228                                                        name = get_rev_name(o);
 229                                        }
 230                                        *(p+1) = c;
 231
 232                                        if (!strcmp(name, "undefined"))
 233                                                continue;
 234
 235                                        fwrite(p_start, p - p_start + 1, 1,
 236                                               stdout);
 237                                        printf(" (%s)", name);
 238                                        p_start = p + 1;
 239                                }
 240                        }
 241
 242                        /* flush */
 243                        if (p_start != p)
 244                                fwrite(p_start, p - p_start, 1, stdout);
 245                }
 246        } else if (all) {
 247                int i, max;
 248
 249                max = get_max_object_index();
 250                for (i = 0; i < max; i++) {
 251                        struct object * obj = get_indexed_object(i);
 252                        if (!obj)
 253                                continue;
 254                        printf("%s %s\n", sha1_to_hex(obj->sha1), get_rev_name(obj));
 255                }
 256        } else {
 257                int i;
 258                for (i = 0; i < revs.nr; i++)
 259                        printf("%s %s\n",
 260                                revs.objects[i].name,
 261                                get_rev_name(revs.objects[i].item));
 262        }
 263
 264        return 0;
 265}
 266