builtin/rev-list.c

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