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 (buf.len) {
 126                         if (revs->commit_format != CMIT_FMT_ONELINE)
 127                                 graph_show_oneline(revs->graph);
 128
 129                         graph_show_commit_msg(revs->graph, stdout, &buf);
 130
 131                         /*
 132                          * Add a newline after the commit message.
 133                          *
 134                          * Usually, this newline produces a blank
 135                          * padding line between entries, in which case
 136                          * we need to add graph padding on this line.
 137                          *
 138                          * However, the commit message may not end in a
 139                          * newline.  In this case the newline simply
 140                          * ends the last line of the commit message,
 141                          * and we don't need any graph output.  (This
 142                          * always happens with CMIT_FMT_ONELINE, and it
 143                          * happens with CMIT_FMT_USERFORMAT when the
 144                          * format doesn't explicitly end in a newline.)
 145                          */
 146                         if (buf.len && buf.buf[buf.len - 1] == '\n')
 147                                 graph_show_padding(revs->graph);
 148                         putchar(info->hdr_termination);
 149                 } else {
 150                         /*
 151                          * If the message buffer is empty, just show
 152                          * the rest of the graph output for this
 153                          * commit.
 154                          */
 155                         if (graph_show_remainder(revs->graph))
 156                                 putchar('\n');
 157                         if (revs->commit_format == CMIT_FMT_ONELINE)
 158                                 putchar('\n');
 159                 }
 160                 strbuf_release(&buf);
 161         } else {
 162                 if (graph_show_remainder(revs->graph))
 163                         putchar('\n');
 164         }
 165         maybe_flush_or_die(stdout, "stdout");
 166         finish_commit(commit, data);
 167 }
 168
 169 static void finish_commit(struct commit *commit, void *data)
 170 {
 171         if (commit->parents) {
 172                 free_commit_list(commit->parents);
 173                 commit->parents = NULL;
 174         }
 175         free_commit_buffer(commit);
 176 }
 177
 178 static void finish_object(struct object *obj, const char *name, void *cb_data)
 179 {
 180         struct rev_list_info *info = cb_data;
 181         if (obj->type == OBJ_BLOB && !has_object_file(&obj->oid))
 182                 die("missing blob object '%s'", oid_to_hex(&obj->oid));
 183         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
 184                 parse_object(obj->oid.hash);
 185 }
 186
 187 static void show_object(struct object *obj, const char *name, void *cb_data)
 188 {
 189         struct rev_list_info *info = cb_data;
 190         finish_object(obj, name, cb_data);
 191         display_progress(progress, ++progress_counter);
 192         if (info->flags & REV_LIST_QUIET)
 193                 return;
 194         show_object_with_name(stdout, obj, name);
 195 }
 196
 197 static void show_edge(struct commit *commit)
 198 {
 199         printf("-%s\n", oid_to_hex(&commit->object.oid));
 200 }
 201
 202 static void print_var_str(const char *var, const char *val)
 203 {
 204         printf("%s='%s'\n", var, val);
 205 }
 206
 207 static void print_var_int(const char *var, int val)
 208 {
 209         printf("%s=%d\n", var, val);
 210 }
 211
 212 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 213 {
 214         int cnt, flags = info->flags;
 215         char hex[GIT_SHA1_HEXSZ + 1] = "";
 216         struct commit_list *tried;
 217         struct rev_info *revs = info->revs;
 218
 219         if (!revs->commits)
 220                 return 1;
 221
 222         revs->commits = filter_skipped(revs->commits, &tried,
 223                                        flags & BISECT_SHOW_ALL,
 224                                        NULL, NULL);
 225
 226         /*
 227          * revs->commits can reach "reaches" commits among
 228          * "all" commits.  If it is good, then there are
 229          * (all-reaches) commits left to be bisected.
 230          * On the other hand, if it is bad, then the set
 231          * to bisect is "reaches".
 232          * A bisect set of size N has (N-1) commits further
 233          * to test, as we already know one bad one.
 234          */
 235         cnt = all - reaches;
 236         if (cnt < reaches)
 237                 cnt = reaches;
 238
 239         if (revs->commits)
 240                 sha1_to_hex_r(hex, revs->commits->item->object.oid.hash);
 241
 242         if (flags & BISECT_SHOW_ALL) {
 243                 traverse_commit_list(revs, show_commit, show_object, info);
 244                 printf("------\n");
 245         }
 246
 247         print_var_str("bisect_rev", hex);
 248         print_var_int("bisect_nr", cnt - 1);
 249         print_var_int("bisect_good", all - reaches - 1);
 250         print_var_int("bisect_bad", reaches - 1);
 251         print_var_int("bisect_all", all);
 252         print_var_int("bisect_steps", estimate_bisect_steps(all));
 253
 254         return 0;
 255 }
 256
 257 static int show_object_fast(
 258         const unsigned char *sha1,
 259         enum object_type type,
 260         int exclude,
 261         uint32_t name_hash,
 262         struct packed_git *found_pack,
 263         off_t found_offset)
 264 {
 265         fprintf(stdout, "%s\n", sha1_to_hex(sha1));
 266         return 1;
 267 }
 268
 269 int cmd_rev_list(int argc, const char **argv, const char *prefix)
 270 {
 271         struct rev_info revs;
 272         struct rev_list_info info;
 273         int i;
 274         int bisect_list = 0;
 275         int bisect_show_vars = 0;
 276         int bisect_find_all = 0;
 277         int use_bitmap_index = 0;
 278         const char *show_progress = NULL;
 279
 280         git_config(git_default_config, NULL);
 281         init_revisions(&revs, prefix);
 282         revs.abbrev = DEFAULT_ABBREV;
 283         revs.commit_format = CMIT_FMT_UNSPECIFIED;
 284         argc = setup_revisions(argc, argv, &revs, NULL);
 285
 286         memset(&info, 0, sizeof(info));
 287         info.revs = &revs;
 288         if (revs.bisect)
 289                 bisect_list = 1;
 290
 291         if (DIFF_OPT_TST(&revs.diffopt, QUICK))
 292                 info.flags |= REV_LIST_QUIET;
 293         for (i = 1 ; i < argc; i++) {
 294                 const char *arg = argv[i];
 295
 296                 if (!strcmp(arg, "--header")) {
 297                         revs.verbose_header = 1;
 298                         continue;
 299                 }
 300                 if (!strcmp(arg, "--timestamp")) {
 301                         info.show_timestamp = 1;
 302                         continue;
 303                 }
 304                 if (!strcmp(arg, "--bisect")) {
 305                         bisect_list = 1;
 306                         continue;
 307                 }
 308                 if (!strcmp(arg, "--bisect-all")) {
 309                         bisect_list = 1;
 310                         bisect_find_all = 1;
 311                         info.flags |= BISECT_SHOW_ALL;
 312                         revs.show_decorations = 1;
 313                         continue;
 314                 }
 315                 if (!strcmp(arg, "--bisect-vars")) {
 316                         bisect_list = 1;
 317                         bisect_show_vars = 1;
 318                         continue;
 319                 }
 320                 if (!strcmp(arg, "--use-bitmap-index")) {
 321                         use_bitmap_index = 1;
 322                         continue;
 323                 }
 324                 if (!strcmp(arg, "--test-bitmap")) {
 325                         test_bitmap_walk(&revs);
 326                         return 0;
 327                 }
 328                 if (skip_prefix(arg, "--progress=", &arg)) {
 329                         show_progress = arg;
 330                         continue;
 331                 }
 332                 usage(rev_list_usage);
 333
 334         }
 335         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 336                 /* The command line has a --pretty  */
 337                 info.hdr_termination = '\n';
 338                 if (revs.commit_format == CMIT_FMT_ONELINE)
 339                         info.header_prefix = "";
 340                 else
 341                         info.header_prefix = "commit ";
 342         }
 343         else if (revs.verbose_header)
 344                 /* Only --header was specified */
 345                 revs.commit_format = CMIT_FMT_RAW;
 346
 347         if ((!revs.commits &&
 348              (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
 349               !revs.pending.nr)) ||
 350             revs.diff)
 351                 usage(rev_list_usage);
 352
 353         if (revs.show_notes)
 354                 die(_("rev-list does not support display of notes"));
 355
 356         save_commit_buffer = (revs.verbose_header ||
 357                               revs.grep_filter.pattern_list ||
 358                               revs.grep_filter.header_list);
 359         if (bisect_list)
 360                 revs.limited = 1;
 361
 362         if (show_progress)
 363                 progress = start_progress_delay(show_progress, 0, 0, 2);
 364
 365         if (use_bitmap_index && !revs.prune) {
 366                 if (revs.count && !revs.left_right && !revs.cherry_mark) {
 367                         uint32_t commit_count;
 368                         int max_count = revs.max_count;
 369                         if (!prepare_bitmap_walk(&revs)) {
 370                                 count_bitmap_commit_list(&commit_count, NULL, NULL, NULL);
 371                                 if (max_count >= 0 && max_count < commit_count)
 372                                         commit_count = max_count;
 373                                 printf("%d\n", commit_count);
 374                                 return 0;
 375                         }
 376                 } else if (revs.max_count < 0 &&
 377                            revs.tag_objects && revs.tree_objects && revs.blob_objects) {
 378                         if (!prepare_bitmap_walk(&revs)) {
 379                                 traverse_bitmap_commit_list(&show_object_fast);
 380                                 return 0;
 381                         }
 382                 }
 383         }
 384
 385         if (prepare_revision_walk(&revs))
 386                 die("revision walk setup failed");
 387         if (revs.tree_objects)
 388                 mark_edges_uninteresting(&revs, show_edge);
 389
 390         if (bisect_list) {
 391                 int reaches = reaches, all = all;
 392
 393                 revs.commits = find_bisection(revs.commits, &reaches, &all,
 394                                               bisect_find_all);
 395
 396                 if (bisect_show_vars)
 397                         return show_bisect_vars(&info, reaches, all);
 398         }
 399
 400         traverse_commit_list(&revs, show_commit, show_object, &info);
 401
 402         stop_progress(&progress);
 403
 404         if (revs.count) {
 405                 if (revs.left_right && revs.cherry_mark)
 406                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 407                 else if (revs.left_right)
 408                         printf("%d\t%d\n", revs.count_left, revs.count_right);
 409                 else if (revs.cherry_mark)
 410                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 411                 else
 412                         printf("%d\n", revs.count_left + revs.count_right);
 413         }
 414
 415         return 0;
 416 }