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