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
  13 static const char rev_list_usage[] =
  14 "git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
  15 "  limiting output:\n"
  16 "    --max-count=<n>\n"
  17 "    --max-age=<epoch>\n"
  18 "    --min-age=<epoch>\n"
  19 "    --sparse\n"
  20 "    --no-merges\n"
  21 "    --min-parents=<n>\n"
  22 "    --no-min-parents\n"
  23 "    --max-parents=<n>\n"
  24 "    --no-max-parents\n"
  25 "    --remove-empty\n"
  26 "    --all\n"
  27 "    --branches\n"
  28 "    --tags\n"
  29 "    --remotes\n"
  30 "    --stdin\n"
  31 "    --quiet\n"
  32 "  ordering output:\n"
  33 "    --topo-order\n"
  34 "    --date-order\n"
  35 "    --reverse\n"
  36 "  formatting output:\n"
  37 "    --parents\n"
  38 "    --children\n"
  39 "    --objects | --objects-edge\n"
  40 "    --unpacked\n"
  41 "    --header | --pretty\n"
  42 "    --abbrev=<n> | --no-abbrev\n"
  43 "    --abbrev-commit\n"
  44 "    --left-right\n"
  45 "    --count\n"
  46 "  special purpose:\n"
  47 "    --bisect\n"
  48 "    --bisect-vars\n"
  49 "    --bisect-all"
  50 ;
  51
  52 static void finish_commit(struct commit *commit, void *data);
  53 static void show_commit(struct commit *commit, void *data)
  54 {
  55         struct rev_list_info *info = data;
  56         struct rev_info *revs = info->revs;
  57
  58         if (info->flags & REV_LIST_QUIET) {
  59                 finish_commit(commit, data);
  60                 return;
  61         }
  62
  63         graph_show_commit(revs->graph);
  64
  65         if (revs->count) {
  66                 if (commit->object.flags & PATCHSAME)
  67                         revs->count_same++;
  68                 else if (commit->object.flags & SYMMETRIC_LEFT)
  69                         revs->count_left++;
  70                 else
  71                         revs->count_right++;
  72                 finish_commit(commit, data);
  73                 return;
  74         }
  75
  76         if (info->show_timestamp)
  77                 printf("%lu ", commit->date);
  78         if (info->header_prefix)
  79                 fputs(info->header_prefix, stdout);
  80
  81         if (!revs->graph)
  82                 fputs(get_revision_mark(revs, commit), stdout);
  83         if (revs->abbrev_commit && revs->abbrev)
  84                 fputs(find_unique_abbrev(commit->object.oid.hash, revs->abbrev),
  85                       stdout);
  86         else
  87                 fputs(oid_to_hex(&commit->object.oid), stdout);
  88         if (revs->print_parents) {
  89                 struct commit_list *parents = commit->parents;
  90                 while (parents) {
  91                         printf(" %s", oid_to_hex(&parents->item->object.oid));
  92                         parents = parents->next;
  93                 }
  94         }
  95         if (revs->children.name) {
  96                 struct commit_list *children;
  97
  98                 children = lookup_decoration(&revs->children, &commit->object);
  99                 while (children) {
 100                         printf(" %s", oid_to_hex(&children->item->object.oid));
 101                         children = children->next;
 102                 }
 103         }
 104         show_decorations(revs, commit);
 105         if (revs->commit_format == CMIT_FMT_ONELINE)
 106                 putchar(' ');
 107         else
 108                 putchar('\n');
 109
 110         if (revs->verbose_header && get_cached_commit_buffer(commit, NULL)) {
 111                 struct strbuf buf = STRBUF_INIT;
 112                 struct pretty_print_context ctx = {0};
 113                 ctx.abbrev = revs->abbrev;
 114                 ctx.date_mode = revs->date_mode;
 115                 ctx.date_mode_explicit = revs->date_mode_explicit;
 116                 ctx.fmt = revs->commit_format;
 117                 ctx.output_encoding = get_log_output_encoding();
 118                 pretty_print_commit(&ctx, commit, &buf);
 119                 if (revs->graph) {
 120                         if (buf.len) {
 121                                 if (revs->commit_format != CMIT_FMT_ONELINE)
 122                                         graph_show_oneline(revs->graph);
 123
 124                                 graph_show_commit_msg(revs->graph, &buf);
 125
 126                                 /*
 127                                  * Add a newline after the commit message.
 128                                  *
 129                                  * Usually, this newline produces a blank
 130                                  * padding line between entries, in which case
 131                                  * we need to add graph padding on this line.
 132                                  *
 133                                  * However, the commit message may not end in a
 134                                  * newline.  In this case the newline simply
 135                                  * ends the last line of the commit message,
 136                                  * and we don't need any graph output.  (This
 137                                  * always happens with CMIT_FMT_ONELINE, and it
 138                                  * happens with CMIT_FMT_USERFORMAT when the
 139                                  * format doesn't explicitly end in a newline.)
 140                                  */
 141                                 if (buf.len && buf.buf[buf.len - 1] == '\n')
 142                                         graph_show_padding(revs->graph);
 143                                 putchar('\n');
 144                         } else {
 145                                 /*
 146                                  * If the message buffer is empty, just show
 147                                  * the rest of the graph output for this
 148                                  * commit.
 149                                  */
 150                                 if (graph_show_remainder(revs->graph))
 151                                         putchar('\n');
 152                                 if (revs->commit_format == CMIT_FMT_ONELINE)
 153                                         putchar('\n');
 154                         }
 155                 } else {
 156                         if (revs->commit_format != CMIT_FMT_USERFORMAT ||
 157                             buf.len) {
 158                                 fwrite(buf.buf, 1, buf.len, stdout);
 159                                 putchar(info->hdr_termination);
 160                         }
 161                 }
 162                 strbuf_release(&buf);
 163         } else {
 164                 if (graph_show_remainder(revs->graph))
 165                         putchar('\n');
 166         }
 167         maybe_flush_or_die(stdout, "stdout");
 168         finish_commit(commit, data);
 169 }
 170
 171 static void finish_commit(struct commit *commit, void *data)
 172 {
 173         if (commit->parents) {
 174                 free_commit_list(commit->parents);
 175                 commit->parents = NULL;
 176         }
 177         free_commit_buffer(commit);
 178 }
 179
 180 static void finish_object(struct object *obj, const char *name, void *cb_data)
 181 {
 182         struct rev_list_info *info = cb_data;
 183         if (obj->type == OBJ_BLOB && !has_object_file(&obj->oid))
 184                 die("missing blob object '%s'", oid_to_hex(&obj->oid));
 185         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
 186                 parse_object(obj->oid.hash);
 187 }
 188
 189 static void show_object(struct object *obj, const char *name, void *cb_data)
 190 {
 191         struct rev_list_info *info = cb_data;
 192         finish_object(obj, name, cb_data);
 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_SHA1_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                 sha1_to_hex_r(hex, revs->commits->item->object.oid.hash);
 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
 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                 usage(rev_list_usage);
 329
 330         }
 331         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 332                 /* The command line has a --pretty  */
 333                 info.hdr_termination = '\n';
 334                 if (revs.commit_format == CMIT_FMT_ONELINE)
 335                         info.header_prefix = "";
 336                 else
 337                         info.header_prefix = "commit ";
 338         }
 339         else if (revs.verbose_header)
 340                 /* Only --header was specified */
 341                 revs.commit_format = CMIT_FMT_RAW;
 342
 343         if ((!revs.commits &&
 344              (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
 345               !revs.pending.nr)) ||
 346             revs.diff)
 347                 usage(rev_list_usage);
 348
 349         if (revs.show_notes)
 350                 die(_("rev-list does not support display of notes"));
 351
 352         save_commit_buffer = (revs.verbose_header ||
 353                               revs.grep_filter.pattern_list ||
 354                               revs.grep_filter.header_list);
 355         if (bisect_list)
 356                 revs.limited = 1;
 357
 358         if (use_bitmap_index && !revs.prune) {
 359                 if (revs.count && !revs.left_right && !revs.cherry_mark) {
 360                         uint32_t commit_count;
 361                         int max_count = revs.max_count;
 362                         if (!prepare_bitmap_walk(&revs)) {
 363                                 count_bitmap_commit_list(&commit_count, NULL, NULL, NULL);
 364                                 if (max_count >= 0 && max_count < commit_count)
 365                                         commit_count = max_count;
 366                                 printf("%d\n", commit_count);
 367                                 return 0;
 368                         }
 369                 } else if (revs.max_count < 0 &&
 370                            revs.tag_objects && revs.tree_objects && revs.blob_objects) {
 371                         if (!prepare_bitmap_walk(&revs)) {
 372                                 traverse_bitmap_commit_list(&show_object_fast);
 373                                 return 0;
 374                         }
 375                 }
 376         }
 377
 378         if (prepare_revision_walk(&revs))
 379                 die("revision walk setup failed");
 380         if (revs.tree_objects)
 381                 mark_edges_uninteresting(&revs, show_edge);
 382
 383         if (bisect_list) {
 384                 int reaches = reaches, all = all;
 385
 386                 revs.commits = find_bisection(revs.commits, &reaches, &all,
 387                                               bisect_find_all);
 388
 389                 if (bisect_show_vars)
 390                         return show_bisect_vars(&info, reaches, all);
 391         }
 392
 393         traverse_commit_list(&revs, show_commit, show_object, &info);
 394
 395         if (revs.count) {
 396                 if (revs.left_right && revs.cherry_mark)
 397                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 398                 else if (revs.left_right)
 399                         printf("%d\t%d\n", revs.count_left, revs.count_right);
 400                 else if (revs.cherry_mark)
 401                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 402                 else
 403                         printf("%d\n", revs.count_left + revs.count_right);
 404         }
 405
 406         return 0;
 407 }