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 "  special purpose:\n"
  46 "    --bisect\n"
  47 "    --bisect-vars\n"
  48 "    --bisect-all"
  49 ;
  50
  51 static void finish_commit(struct commit *commit, void *data);
  52 static void show_commit(struct commit *commit, void *data)
  53 {
  54         struct rev_list_info *info = data;
  55         struct rev_info *revs = info->revs;
  56
  57         if (info->flags & REV_LIST_QUIET) {
  58                 finish_commit(commit, data);
  59                 return;
  60         }
  61
  62         graph_show_commit(revs->graph);
  63
  64         if (revs->count) {
  65                 if (commit->object.flags & PATCHSAME)
  66                         revs->count_same++;
  67                 else if (commit->object.flags & SYMMETRIC_LEFT)
  68                         revs->count_left++;
  69                 else
  70                         revs->count_right++;
  71                 finish_commit(commit, data);
  72                 return;
  73         }
  74
  75         if (info->show_timestamp)
  76                 printf("%lu ", commit->date);
  77         if (info->header_prefix)
  78                 fputs(info->header_prefix, stdout);
  79
  80         if (!revs->graph)
  81                 fputs(get_revision_mark(revs, commit), stdout);
  82         if (revs->abbrev_commit && revs->abbrev)
  83                 fputs(find_unique_abbrev(commit->object.sha1, revs->abbrev),
  84                       stdout);
  85         else
  86                 fputs(sha1_to_hex(commit->object.sha1), stdout);
  87         if (revs->print_parents) {
  88                 struct commit_list *parents = commit->parents;
  89                 while (parents) {
  90                         printf(" %s", sha1_to_hex(parents->item->object.sha1));
  91                         parents = parents->next;
  92                 }
  93         }
  94         if (revs->children.name) {
  95                 struct commit_list *children;
  96
  97                 children = lookup_decoration(&revs->children, &commit->object);
  98                 while (children) {
  99                         printf(" %s", sha1_to_hex(children->item->object.sha1));
 100                         children = children->next;
 101                 }
 102         }
 103         show_decorations(revs, commit);
 104         if (revs->commit_format == CMIT_FMT_ONELINE)
 105                 putchar(' ');
 106         else
 107                 putchar('\n');
 108
 109         if (revs->verbose_header && get_cached_commit_buffer(commit, NULL)) {
 110                 struct strbuf buf = STRBUF_INIT;
 111                 struct pretty_print_context ctx = {0};
 112                 ctx.abbrev = revs->abbrev;
 113                 ctx.date_mode = revs->date_mode;
 114                 ctx.date_mode_explicit = revs->date_mode_explicit;
 115                 ctx.fmt = revs->commit_format;
 116                 ctx.output_encoding = get_log_output_encoding();
 117                 pretty_print_commit(&ctx, commit, &buf);
 118                 if (revs->graph) {
 119                         if (buf.len) {
 120                                 if (revs->commit_format != CMIT_FMT_ONELINE)
 121                                         graph_show_oneline(revs->graph);
 122
 123                                 graph_show_commit_msg(revs->graph, &buf);
 124
 125                                 /*
 126                                  * Add a newline after the commit message.
 127                                  *
 128                                  * Usually, this newline produces a blank
 129                                  * padding line between entries, in which case
 130                                  * we need to add graph padding on this line.
 131                                  *
 132                                  * However, the commit message may not end in a
 133                                  * newline.  In this case the newline simply
 134                                  * ends the last line of the commit message,
 135                                  * and we don't need any graph output.  (This
 136                                  * always happens with CMIT_FMT_ONELINE, and it
 137                                  * happens with CMIT_FMT_USERFORMAT when the
 138                                  * format doesn't explicitly end in a newline.)
 139                                  */
 140                                 if (buf.len && buf.buf[buf.len - 1] == '\n')
 141                                         graph_show_padding(revs->graph);
 142                                 putchar('\n');
 143                         } else {
 144                                 /*
 145                                  * If the message buffer is empty, just show
 146                                  * the rest of the graph output for this
 147                                  * commit.
 148                                  */
 149                                 if (graph_show_remainder(revs->graph))
 150                                         putchar('\n');
 151                                 if (revs->commit_format == CMIT_FMT_ONELINE)
 152                                         putchar('\n');
 153                         }
 154                 } else {
 155                         if (revs->commit_format != CMIT_FMT_USERFORMAT ||
 156                             buf.len) {
 157                                 fwrite(buf.buf, 1, buf.len, stdout);
 158                                 putchar(info->hdr_termination);
 159                         }
 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,
 180                           const struct name_path *path, const char *name,
 181                           void *cb_data)
 182 {
 183         struct rev_list_info *info = cb_data;
 184         if (obj->type == OBJ_BLOB && !has_sha1_file(obj->sha1))
 185                 die("missing blob object '%s'", sha1_to_hex(obj->sha1));
 186         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
 187                 parse_object(obj->sha1);
 188 }
 189
 190 static void show_object(struct object *obj,
 191                         const struct name_path *path, const char *component,
 192                         void *cb_data)
 193 {
 194         struct rev_list_info *info = cb_data;
 195         finish_object(obj, path, component, cb_data);
 196         if (info->flags & REV_LIST_QUIET)
 197                 return;
 198         show_object_with_name(stdout, obj, path, component);
 199 }
 200
 201 static void show_edge(struct commit *commit)
 202 {
 203         printf("-%s\n", sha1_to_hex(commit->object.sha1));
 204 }
 205
 206 static void print_var_str(const char *var, const char *val)
 207 {
 208         printf("%s='%s'\n", var, val);
 209 }
 210
 211 static void print_var_int(const char *var, int val)
 212 {
 213         printf("%s=%d\n", var, val);
 214 }
 215
 216 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 217 {
 218         int cnt, flags = info->flags;
 219         char hex[41] = "";
 220         struct commit_list *tried;
 221         struct rev_info *revs = info->revs;
 222
 223         if (!revs->commits)
 224                 return 1;
 225
 226         revs->commits = filter_skipped(revs->commits, &tried,
 227                                        flags & BISECT_SHOW_ALL,
 228                                        NULL, NULL);
 229
 230         /*
 231          * revs->commits can reach "reaches" commits among
 232          * "all" commits.  If it is good, then there are
 233          * (all-reaches) commits left to be bisected.
 234          * On the other hand, if it is bad, then the set
 235          * to bisect is "reaches".
 236          * A bisect set of size N has (N-1) commits further
 237          * to test, as we already know one bad one.
 238          */
 239         cnt = all - reaches;
 240         if (cnt < reaches)
 241                 cnt = reaches;
 242
 243         if (revs->commits)
 244                 strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
 245
 246         if (flags & BISECT_SHOW_ALL) {
 247                 traverse_commit_list(revs, show_commit, show_object, info);
 248                 printf("------\n");
 249         }
 250
 251         print_var_str("bisect_rev", hex);
 252         print_var_int("bisect_nr", cnt - 1);
 253         print_var_int("bisect_good", all - reaches - 1);
 254         print_var_int("bisect_bad", reaches - 1);
 255         print_var_int("bisect_all", all);
 256         print_var_int("bisect_steps", estimate_bisect_steps(all));
 257
 258         return 0;
 259 }
 260
 261 static int show_object_fast(
 262         const unsigned char *sha1,
 263         enum object_type type,
 264         int exclude,
 265         uint32_t name_hash,
 266         struct packed_git *found_pack,
 267         off_t found_offset)
 268 {
 269         fprintf(stdout, "%s\n", sha1_to_hex(sha1));
 270         return 1;
 271 }
 272
 273 int cmd_rev_list(int argc, const char **argv, const char *prefix)
 274 {
 275         struct rev_info revs;
 276         struct rev_list_info info;
 277         int i;
 278         int bisect_list = 0;
 279         int bisect_show_vars = 0;
 280         int bisect_find_all = 0;
 281         int use_bitmap_index = 0;
 282
 283         git_config(git_default_config, NULL);
 284         init_revisions(&revs, prefix);
 285         revs.abbrev = DEFAULT_ABBREV;
 286         revs.commit_format = CMIT_FMT_UNSPECIFIED;
 287         argc = setup_revisions(argc, argv, &revs, NULL);
 288
 289         memset(&info, 0, sizeof(info));
 290         info.revs = &revs;
 291         if (revs.bisect)
 292                 bisect_list = 1;
 293
 294         if (DIFF_OPT_TST(&revs.diffopt, QUICK))
 295                 info.flags |= REV_LIST_QUIET;
 296         for (i = 1 ; i < argc; i++) {
 297                 const char *arg = argv[i];
 298
 299                 if (!strcmp(arg, "--header")) {
 300                         revs.verbose_header = 1;
 301                         continue;
 302                 }
 303                 if (!strcmp(arg, "--timestamp")) {
 304                         info.show_timestamp = 1;
 305                         continue;
 306                 }
 307                 if (!strcmp(arg, "--bisect")) {
 308                         bisect_list = 1;
 309                         continue;
 310                 }
 311                 if (!strcmp(arg, "--bisect-all")) {
 312                         bisect_list = 1;
 313                         bisect_find_all = 1;
 314                         info.flags |= BISECT_SHOW_ALL;
 315                         revs.show_decorations = 1;
 316                         continue;
 317                 }
 318                 if (!strcmp(arg, "--bisect-vars")) {
 319                         bisect_list = 1;
 320                         bisect_show_vars = 1;
 321                         continue;
 322                 }
 323                 if (!strcmp(arg, "--use-bitmap-index")) {
 324                         use_bitmap_index = 1;
 325                         continue;
 326                 }
 327                 if (!strcmp(arg, "--test-bitmap")) {
 328                         test_bitmap_walk(&revs);
 329                         return 0;
 330                 }
 331                 usage(rev_list_usage);
 332
 333         }
 334         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 335                 /* The command line has a --pretty  */
 336                 info.hdr_termination = '\n';
 337                 if (revs.commit_format == CMIT_FMT_ONELINE)
 338                         info.header_prefix = "";
 339                 else
 340                         info.header_prefix = "commit ";
 341         }
 342         else if (revs.verbose_header)
 343                 /* Only --header was specified */
 344                 revs.commit_format = CMIT_FMT_RAW;
 345
 346         if ((!revs.commits &&
 347              (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
 348               !revs.pending.nr)) ||
 349             revs.diff)
 350                 usage(rev_list_usage);
 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) {
 359                 if (revs.count && !revs.left_right && !revs.cherry_mark) {
 360                         uint32_t commit_count;
 361                         if (!prepare_bitmap_walk(&revs)) {
 362                                 count_bitmap_commit_list(&commit_count, NULL, NULL, NULL);
 363                                 printf("%d\n", commit_count);
 364                                 return 0;
 365                         }
 366                 } else if (revs.tag_objects && revs.tree_objects && revs.blob_objects) {
 367                         if (!prepare_bitmap_walk(&revs)) {
 368                                 traverse_bitmap_commit_list(&show_object_fast);
 369                                 return 0;
 370                         }
 371                 }
 372         }
 373
 374         if (prepare_revision_walk(&revs))
 375                 die("revision walk setup failed");
 376         if (revs.tree_objects)
 377                 mark_edges_uninteresting(&revs, show_edge);
 378
 379         if (bisect_list) {
 380                 int reaches = reaches, all = all;
 381
 382                 revs.commits = find_bisection(revs.commits, &reaches, &all,
 383                                               bisect_find_all);
 384
 385                 if (bisect_show_vars)
 386                         return show_bisect_vars(&info, reaches, all);
 387         }
 388
 389         traverse_commit_list(&revs, show_commit, show_object, &info);
 390
 391         if (revs.count) {
 392                 if (revs.left_right && revs.cherry_mark)
 393                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 394                 else if (revs.left_right)
 395                         printf("%d\t%d\n", revs.count_left, revs.count_right);
 396                 else if (revs.cherry_mark)
 397                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 398                 else
 399                         printf("%d\n", revs.count_left + revs.count_right);
 400         }
 401
 402         return 0;
 403 }