builtin/rev-list.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "diff.h"
   4 #include "revision.h"
   5 #include "list-objects.h"
   6 #include "pack.h"
   7 #include "pack-bitmap.h"
   8 #include "builtin.h"
   9 #include "log-tree.h"
  10 #include "graph.h"
  11 #include "bisect.h"
  12 #include "progress.h"
  13
  14 static const char rev_list_usage[] =
  15 "git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
  16 "  limiting output:\n"
  17 "    --max-count=<n>\n"
  18 "    --max-age=<epoch>\n"
  19 "    --min-age=<epoch>\n"
  20 "    --sparse\n"
  21 "    --no-merges\n"
  22 "    --min-parents=<n>\n"
  23 "    --no-min-parents\n"
  24 "    --max-parents=<n>\n"
  25 "    --no-max-parents\n"
  26 "    --remove-empty\n"
  27 "    --all\n"
  28 "    --branches\n"
  29 "    --tags\n"
  30 "    --remotes\n"
  31 "    --stdin\n"
  32 "    --quiet\n"
  33 "  ordering output:\n"
  34 "    --topo-order\n"
  35 "    --date-order\n"
  36 "    --reverse\n"
  37 "  formatting output:\n"
  38 "    --parents\n"
  39 "    --children\n"
  40 "    --objects | --objects-edge\n"
  41 "    --unpacked\n"
  42 "    --header | --pretty\n"
  43 "    --abbrev=<n> | --no-abbrev\n"
  44 "    --abbrev-commit\n"
  45 "    --left-right\n"
  46 "    --count\n"
  47 "  special purpose:\n"
  48 "    --bisect\n"
  49 "    --bisect-vars\n"
  50 "    --bisect-all"
  51 ;
  52
  53 static struct progress *progress;
  54 static unsigned progress_counter;
  55
  56 static void finish_commit(struct commit *commit, void *data);
  57 static void show_commit(struct commit *commit, void *data)
  58 {
  59         struct rev_list_info *info = data;
  60         struct rev_info *revs = info->revs;
  61
  62         display_progress(progress, ++progress_counter);
  63
  64         if (info->flags & REV_LIST_QUIET) {
  65                 finish_commit(commit, data);
  66                 return;
  67         }
  68
  69         graph_show_commit(revs->graph);
  70
  71         if (revs->count) {
  72                 if (commit->object.flags & PATCHSAME)
  73                         revs->count_same++;
  74                 else if (commit->object.flags & SYMMETRIC_LEFT)
  75                         revs->count_left++;
  76                 else
  77                         revs->count_right++;
  78                 finish_commit(commit, data);
  79                 return;
  80         }
  81
  82         if (info->show_timestamp)
  83                 printf("%lu ", commit->date);
  84         if (info->header_prefix)
  85                 fputs(info->header_prefix, stdout);
  86
  87         if (!revs->graph)
  88                 fputs(get_revision_mark(revs, commit), stdout);
  89         if (revs->abbrev_commit && revs->abbrev)
  90                 fputs(find_unique_abbrev(commit->object.oid.hash, revs->abbrev),
  91                       stdout);
  92         else
  93                 fputs(oid_to_hex(&commit->object.oid), stdout);
  94         if (revs->print_parents) {
  95                 struct commit_list *parents = commit->parents;
  96                 while (parents) {
  97                         printf(" %s", oid_to_hex(&parents->item->object.oid));
  98                         parents = parents->next;
  99                 }
 100         }
 101         if (revs->children.name) {
 102                 struct commit_list *children;
 103
 104                 children = lookup_decoration(&revs->children, &commit->object);
 105                 while (children) {
 106                         printf(" %s", oid_to_hex(&children->item->object.oid));
 107                         children = children->next;
 108                 }
 109         }
 110         show_decorations(revs, commit);
 111         if (revs->commit_format == CMIT_FMT_ONELINE)
 112                 putchar(' ');
 113         else
 114                 putchar('\n');
 115
 116         if (revs->verbose_header && get_cached_commit_buffer(commit, NULL)) {
 117                 struct strbuf buf = STRBUF_INIT;
 118                 struct pretty_print_context ctx = {0};
 119                 ctx.abbrev = revs->abbrev;
 120                 ctx.date_mode = revs->date_mode;
 121                 ctx.date_mode_explicit = revs->date_mode_explicit;
 122                 ctx.fmt = revs->commit_format;
 123                 ctx.output_encoding = get_log_output_encoding();
 124                 pretty_print_commit(&ctx, commit, &buf);
 125                 if (revs->graph) {
 126                         if (buf.len) {
 127                                 if (revs->commit_format != CMIT_FMT_ONELINE)
 128                                         graph_show_oneline(revs->graph);
 129
 130                                 graph_show_commit_msg(revs->graph, &buf);
 131
 132                                 /*
 133                                  * Add a newline after the commit message.
 134                                  *
 135                                  * Usually, this newline produces a blank
 136                                  * padding line between entries, in which case
 137                                  * we need to add graph padding on this line.
 138                                  *
 139                                  * However, the commit message may not end in a
 140                                  * newline.  In this case the newline simply
 141                                  * ends the last line of the commit message,
 142                                  * and we don't need any graph output.  (This
 143                                  * always happens with CMIT_FMT_ONELINE, and it
 144                                  * happens with CMIT_FMT_USERFORMAT when the
 145                                  * format doesn't explicitly end in a newline.)
 146                                  */
 147                                 if (buf.len && buf.buf[buf.len - 1] == '\n')
 148                                         graph_show_padding(revs->graph);
 149                                 putchar('\n');
 150                         } else {
 151                                 /*
 152                                  * If the message buffer is empty, just show
 153                                  * the rest of the graph output for this
 154                                  * commit.
 155                                  */
 156                                 if (graph_show_remainder(revs->graph))
 157                                         putchar('\n');
 158                                 if (revs->commit_format == CMIT_FMT_ONELINE)
 159                                         putchar('\n');
 160                         }
 161                 } else {
 162                         if (revs->commit_format != CMIT_FMT_USERFORMAT ||
 163                             buf.len) {
 164                                 fwrite(buf.buf, 1, buf.len, stdout);
 165                                 putchar(info->hdr_termination);
 166                         }
 167                 }
 168                 strbuf_release(&buf);
 169         } else {
 170                 if (graph_show_remainder(revs->graph))
 171                         putchar('\n');
 172         }
 173         maybe_flush_or_die(stdout, "stdout");
 174         finish_commit(commit, data);
 175 }
 176
 177 static void finish_commit(struct commit *commit, void *data)
 178 {
 179         if (commit->parents) {
 180                 free_commit_list(commit->parents);
 181                 commit->parents = NULL;
 182         }
 183         free_commit_buffer(commit);
 184 }
 185
 186 static void finish_object(struct object *obj, const char *name, void *cb_data)
 187 {
 188         struct rev_list_info *info = cb_data;
 189         if (obj->type == OBJ_BLOB && !has_object_file(&obj->oid))
 190                 die("missing blob object '%s'", oid_to_hex(&obj->oid));
 191         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
 192                 parse_object(obj->oid.hash);
 193 }
 194
 195 static void show_object(struct object *obj, const char *name, void *cb_data)
 196 {
 197         struct rev_list_info *info = cb_data;
 198         finish_object(obj, name, cb_data);
 199         display_progress(progress, ++progress_counter);
 200         if (info->flags & REV_LIST_QUIET)
 201                 return;
 202         show_object_with_name(stdout, obj, name);
 203 }
 204
 205 static void show_edge(struct commit *commit)
 206 {
 207         printf("-%s\n", oid_to_hex(&commit->object.oid));
 208 }
 209
 210 static void print_var_str(const char *var, const char *val)
 211 {
 212         printf("%s='%s'\n", var, val);
 213 }
 214
 215 static void print_var_int(const char *var, int val)
 216 {
 217         printf("%s=%d\n", var, val);
 218 }
 219
 220 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 221 {
 222         int cnt, flags = info->flags;
 223         char hex[GIT_SHA1_HEXSZ + 1] = "";
 224         struct commit_list *tried;
 225         struct rev_info *revs = info->revs;
 226
 227         if (!revs->commits)
 228                 return 1;
 229
 230         revs->commits = filter_skipped(revs->commits, &tried,
 231                                        flags & BISECT_SHOW_ALL,
 232                                        NULL, NULL);
 233
 234         /*
 235          * revs->commits can reach "reaches" commits among
 236          * "all" commits.  If it is good, then there are
 237          * (all-reaches) commits left to be bisected.
 238          * On the other hand, if it is bad, then the set
 239          * to bisect is "reaches".
 240          * A bisect set of size N has (N-1) commits further
 241          * to test, as we already know one bad one.
 242          */
 243         cnt = all - reaches;
 244         if (cnt < reaches)
 245                 cnt = reaches;
 246
 247         if (revs->commits)
 248                 sha1_to_hex_r(hex, revs->commits->item->object.oid.hash);
 249
 250         if (flags & BISECT_SHOW_ALL) {
 251                 traverse_commit_list(revs, show_commit, show_object, info);
 252                 printf("------\n");
 253         }
 254
 255         print_var_str("bisect_rev", hex);
 256         print_var_int("bisect_nr", cnt - 1);
 257         print_var_int("bisect_good", all - reaches - 1);
 258         print_var_int("bisect_bad", reaches - 1);
 259         print_var_int("bisect_all", all);
 260         print_var_int("bisect_steps", estimate_bisect_steps(all));
 261
 262         return 0;
 263 }
 264
 265 static int show_object_fast(
 266         const unsigned char *sha1,
 267         enum object_type type,
 268         int exclude,
 269         uint32_t name_hash,
 270         struct packed_git *found_pack,
 271         off_t found_offset)
 272 {
 273         fprintf(stdout, "%s\n", sha1_to_hex(sha1));
 274         return 1;
 275 }
 276
 277 int cmd_rev_list(int argc, const char **argv, const char *prefix)
 278 {
 279         struct rev_info revs;
 280         struct rev_list_info info;
 281         int i;
 282         int bisect_list = 0;
 283         int bisect_show_vars = 0;
 284         int bisect_find_all = 0;
 285         int use_bitmap_index = 0;
 286         const char *show_progress = NULL;
 287
 288         git_config(git_default_config, NULL);
 289         init_revisions(&revs, prefix);
 290         revs.abbrev = DEFAULT_ABBREV;
 291         revs.commit_format = CMIT_FMT_UNSPECIFIED;
 292         argc = setup_revisions(argc, argv, &revs, NULL);
 293
 294         memset(&info, 0, sizeof(info));
 295         info.revs = &revs;
 296         if (revs.bisect)
 297                 bisect_list = 1;
 298
 299         if (DIFF_OPT_TST(&revs.diffopt, QUICK))
 300                 info.flags |= REV_LIST_QUIET;
 301         for (i = 1 ; i < argc; i++) {
 302                 const char *arg = argv[i];
 303
 304                 if (!strcmp(arg, "--header")) {
 305                         revs.verbose_header = 1;
 306                         continue;
 307                 }
 308                 if (!strcmp(arg, "--timestamp")) {
 309                         info.show_timestamp = 1;
 310                         continue;
 311                 }
 312                 if (!strcmp(arg, "--bisect")) {
 313                         bisect_list = 1;
 314                         continue;
 315                 }
 316                 if (!strcmp(arg, "--bisect-all")) {
 317                         bisect_list = 1;
 318                         bisect_find_all = 1;
 319                         info.flags |= BISECT_SHOW_ALL;
 320                         revs.show_decorations = 1;
 321                         continue;
 322                 }
 323                 if (!strcmp(arg, "--bisect-vars")) {
 324                         bisect_list = 1;
 325                         bisect_show_vars = 1;
 326                         continue;
 327                 }
 328                 if (!strcmp(arg, "--use-bitmap-index")) {
 329                         use_bitmap_index = 1;
 330                         continue;
 331                 }
 332                 if (!strcmp(arg, "--test-bitmap")) {
 333                         test_bitmap_walk(&revs);
 334                         return 0;
 335                 }
 336                 if (skip_prefix(arg, "--progress=", &arg)) {
 337                         show_progress = arg;
 338                         continue;
 339                 }
 340                 usage(rev_list_usage);
 341
 342         }
 343         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 344                 /* The command line has a --pretty  */
 345                 info.hdr_termination = '\n';
 346                 if (revs.commit_format == CMIT_FMT_ONELINE)
 347                         info.header_prefix = "";
 348                 else
 349                         info.header_prefix = "commit ";
 350         }
 351         else if (revs.verbose_header)
 352                 /* Only --header was specified */
 353                 revs.commit_format = CMIT_FMT_RAW;
 354
 355         if ((!revs.commits &&
 356              (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
 357               !revs.pending.nr)) ||
 358             revs.diff)
 359                 usage(rev_list_usage);
 360
 361         if (revs.show_notes)
 362                 die(_("rev-list does not support display of notes"));
 363
 364         save_commit_buffer = (revs.verbose_header ||
 365                               revs.grep_filter.pattern_list ||
 366                               revs.grep_filter.header_list);
 367         if (bisect_list)
 368                 revs.limited = 1;
 369
 370         if (show_progress)
 371                 progress = start_progress_delay(show_progress, 0, 0, 2);
 372
 373         if (use_bitmap_index && !revs.prune) {
 374                 if (revs.count && !revs.left_right && !revs.cherry_mark) {
 375                         uint32_t commit_count;
 376                         int max_count = revs.max_count;
 377                         if (!prepare_bitmap_walk(&revs)) {
 378                                 count_bitmap_commit_list(&commit_count, NULL, NULL, NULL);
 379                                 if (max_count >= 0 && max_count < commit_count)
 380                                         commit_count = max_count;
 381                                 printf("%d\n", commit_count);
 382                                 return 0;
 383                         }
 384                 } else if (revs.max_count < 0 &&
 385                            revs.tag_objects && revs.tree_objects && revs.blob_objects) {
 386                         if (!prepare_bitmap_walk(&revs)) {
 387                                 traverse_bitmap_commit_list(&show_object_fast);
 388                                 return 0;
 389                         }
 390                 }
 391         }
 392
 393         if (prepare_revision_walk(&revs))
 394                 die("revision walk setup failed");
 395         if (revs.tree_objects)
 396                 mark_edges_uninteresting(&revs, show_edge);
 397
 398         if (bisect_list) {
 399                 int reaches = reaches, all = all;
 400
 401                 revs.commits = find_bisection(revs.commits, &reaches, &all,
 402                                               bisect_find_all);
 403
 404                 if (bisect_show_vars)
 405                         return show_bisect_vars(&info, reaches, all);
 406         }
 407
 408         traverse_commit_list(&revs, show_commit, show_object, &info);
 409
 410         stop_progress(&progress);
 411
 412         if (revs.count) {
 413                 if (revs.left_right && revs.cherry_mark)
 414                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 415                 else if (revs.left_right)
 416                         printf("%d\t%d\n", revs.count_left, revs.count_right);
 417                 else if (revs.cherry_mark)
 418                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 419                 else
 420                         printf("%d\n", revs.count_left + revs.count_right);
 421         }
 422
 423         return 0;
 424 }