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                 ctx.color = revs->diffopt.use_color;
 126                 pretty_print_commit(&ctx, commit, &buf);
 127                 if (buf.len) {
 128                         if (revs->commit_format != CMIT_FMT_ONELINE)
 129                                 graph_show_oneline(revs->graph);
 130
 131                         graph_show_commit_msg(revs->graph, stdout, &buf);
 132
 133                         /*
 134                          * Add a newline after the commit message.
 135                          *
 136                          * Usually, this newline produces a blank
 137                          * padding line between entries, in which case
 138                          * we need to add graph padding on this line.
 139                          *
 140                          * However, the commit message may not end in a
 141                          * newline.  In this case the newline simply
 142                          * ends the last line of the commit message,
 143                          * and we don't need any graph output.  (This
 144                          * always happens with CMIT_FMT_ONELINE, and it
 145                          * happens with CMIT_FMT_USERFORMAT when the
 146                          * format doesn't explicitly end in a newline.)
 147                          */
 148                         if (buf.len && buf.buf[buf.len - 1] == '\n')
 149                                 graph_show_padding(revs->graph);
 150                         putchar(info->hdr_termination);
 151                 } else {
 152                         /*
 153                          * If the message buffer is empty, just show
 154                          * the rest of the graph output for this
 155                          * commit.
 156                          */
 157                         if (graph_show_remainder(revs->graph))
 158                                 putchar('\n');
 159                         if (revs->commit_format == CMIT_FMT_ONELINE)
 160                                 putchar('\n');
 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);
 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         display_progress(progress, ++progress_counter);
 194         if (info->flags & REV_LIST_QUIET)
 195                 return;
 196         show_object_with_name(stdout, obj, name);
 197 }
 198
 199 static void show_edge(struct commit *commit)
 200 {
 201         printf("-%s\n", oid_to_hex(&commit->object.oid));
 202 }
 203
 204 static void print_var_str(const char *var, const char *val)
 205 {
 206         printf("%s='%s'\n", var, val);
 207 }
 208
 209 static void print_var_int(const char *var, int val)
 210 {
 211         printf("%s=%d\n", var, val);
 212 }
 213
 214 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 215 {
 216         int cnt, flags = info->flags;
 217         char hex[GIT_MAX_HEXSZ + 1] = "";
 218         struct commit_list *tried;
 219         struct rev_info *revs = info->revs;
 220
 221         if (!revs->commits)
 222                 return 1;
 223
 224         revs->commits = filter_skipped(revs->commits, &tried,
 225                                        flags & BISECT_SHOW_ALL,
 226                                        NULL, NULL);
 227
 228         /*
 229          * revs->commits can reach "reaches" commits among
 230          * "all" commits.  If it is good, then there are
 231          * (all-reaches) commits left to be bisected.
 232          * On the other hand, if it is bad, then the set
 233          * to bisect is "reaches".
 234          * A bisect set of size N has (N-1) commits further
 235          * to test, as we already know one bad one.
 236          */
 237         cnt = all - reaches;
 238         if (cnt < reaches)
 239                 cnt = reaches;
 240
 241         if (revs->commits)
 242                 oid_to_hex_r(hex, &revs->commits->item->object.oid);
 243
 244         if (flags & BISECT_SHOW_ALL) {
 245                 traverse_commit_list(revs, show_commit, show_object, info);
 246                 printf("------\n");
 247         }
 248
 249         print_var_str("bisect_rev", hex);
 250         print_var_int("bisect_nr", cnt - 1);
 251         print_var_int("bisect_good", all - reaches - 1);
 252         print_var_int("bisect_bad", reaches - 1);
 253         print_var_int("bisect_all", all);
 254         print_var_int("bisect_steps", estimate_bisect_steps(all));
 255
 256         return 0;
 257 }
 258
 259 static int show_object_fast(
 260         const unsigned char *sha1,
 261         enum object_type type,
 262         int exclude,
 263         uint32_t name_hash,
 264         struct packed_git *found_pack,
 265         off_t found_offset)
 266 {
 267         fprintf(stdout, "%s\n", sha1_to_hex(sha1));
 268         return 1;
 269 }
 270
 271 int cmd_rev_list(int argc, const char **argv, const char *prefix)
 272 {
 273         struct rev_info revs;
 274         struct rev_list_info info;
 275         int i;
 276         int bisect_list = 0;
 277         int bisect_show_vars = 0;
 278         int bisect_find_all = 0;
 279         int use_bitmap_index = 0;
 280         const char *show_progress = NULL;
 281
 282         if (argc == 2 && !strcmp(argv[1], "-h"))
 283                 usage(rev_list_usage);
 284
 285         git_config(git_default_config, NULL);
 286         init_revisions(&revs, prefix);
 287         revs.abbrev = DEFAULT_ABBREV;
 288         revs.commit_format = CMIT_FMT_UNSPECIFIED;
 289         argc = setup_revisions(argc, argv, &revs, NULL);
 290
 291         memset(&info, 0, sizeof(info));
 292         info.revs = &revs;
 293         if (revs.bisect)
 294                 bisect_list = 1;
 295
 296         if (DIFF_OPT_TST(&revs.diffopt, QUICK))
 297                 info.flags |= REV_LIST_QUIET;
 298         for (i = 1 ; i < argc; i++) {
 299                 const char *arg = argv[i];
 300
 301                 if (!strcmp(arg, "--header")) {
 302                         revs.verbose_header = 1;
 303                         continue;
 304                 }
 305                 if (!strcmp(arg, "--timestamp")) {
 306                         info.show_timestamp = 1;
 307                         continue;
 308                 }
 309                 if (!strcmp(arg, "--bisect")) {
 310                         bisect_list = 1;
 311                         continue;
 312                 }
 313                 if (!strcmp(arg, "--bisect-all")) {
 314                         bisect_list = 1;
 315                         bisect_find_all = 1;
 316                         info.flags |= BISECT_SHOW_ALL;
 317                         revs.show_decorations = 1;
 318                         continue;
 319                 }
 320                 if (!strcmp(arg, "--bisect-vars")) {
 321                         bisect_list = 1;
 322                         bisect_show_vars = 1;
 323                         continue;
 324                 }
 325                 if (!strcmp(arg, "--use-bitmap-index")) {
 326                         use_bitmap_index = 1;
 327                         continue;
 328                 }
 329                 if (!strcmp(arg, "--test-bitmap")) {
 330                         test_bitmap_walk(&revs);
 331                         return 0;
 332                 }
 333                 if (skip_prefix(arg, "--progress=", &arg)) {
 334                         show_progress = arg;
 335                         continue;
 336                 }
 337                 usage(rev_list_usage);
 338
 339         }
 340         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 341                 /* The command line has a --pretty  */
 342                 info.hdr_termination = '\n';
 343                 if (revs.commit_format == CMIT_FMT_ONELINE)
 344                         info.header_prefix = "";
 345                 else
 346                         info.header_prefix = "commit ";
 347         }
 348         else if (revs.verbose_header)
 349                 /* Only --header was specified */
 350                 revs.commit_format = CMIT_FMT_RAW;
 351
 352         if ((!revs.commits &&
 353              (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
 354               !revs.pending.nr)) ||
 355             revs.diff)
 356                 usage(rev_list_usage);
 357
 358         if (revs.show_notes)
 359                 die(_("rev-list does not support display of notes"));
 360
 361         save_commit_buffer = (revs.verbose_header ||
 362                               revs.grep_filter.pattern_list ||
 363                               revs.grep_filter.header_list);
 364         if (bisect_list)
 365                 revs.limited = 1;
 366
 367         if (show_progress)
 368                 progress = start_progress_delay(show_progress, 0, 0, 2);
 369
 370         if (use_bitmap_index && !revs.prune) {
 371                 if (revs.count && !revs.left_right && !revs.cherry_mark) {
 372                         uint32_t commit_count;
 373                         int max_count = revs.max_count;
 374                         if (!prepare_bitmap_walk(&revs)) {
 375                                 count_bitmap_commit_list(&commit_count, NULL, NULL, NULL);
 376                                 if (max_count >= 0 && max_count < commit_count)
 377                                         commit_count = max_count;
 378                                 printf("%d\n", commit_count);
 379                                 return 0;
 380                         }
 381                 } else if (revs.max_count < 0 &&
 382                            revs.tag_objects && revs.tree_objects && revs.blob_objects) {
 383                         if (!prepare_bitmap_walk(&revs)) {
 384                                 traverse_bitmap_commit_list(&show_object_fast);
 385                                 return 0;
 386                         }
 387                 }
 388         }
 389
 390         if (prepare_revision_walk(&revs))
 391                 die("revision walk setup failed");
 392         if (revs.tree_objects)
 393                 mark_edges_uninteresting(&revs, show_edge);
 394
 395         if (bisect_list) {
 396                 int reaches = reaches, all = all;
 397
 398                 revs.commits = find_bisection(revs.commits, &reaches, &all,
 399                                               bisect_find_all);
 400
 401                 if (bisect_show_vars)
 402                         return show_bisect_vars(&info, reaches, all);
 403         }
 404
 405         traverse_commit_list(&revs, show_commit, show_object, &info);
 406
 407         stop_progress(&progress);
 408
 409         if (revs.count) {
 410                 if (revs.left_right && revs.cherry_mark)
 411                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 412                 else if (revs.left_right)
 413                         printf("%d\t%d\n", revs.count_left, revs.count_right);
 414                 else if (revs.cherry_mark)
 415                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 416                 else
 417                         printf("%d\n", revs.count_left + revs.count_right);
 418         }
 419
 420         return 0;
 421 }