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 "builtin.h"
   7 #include "log-tree.h"
   8 #include "graph.h"
   9 #include "bisect.h"
  10
  11 static const char rev_list_usage[] =
  12 "git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
  13 "  limiting output:\n"
  14 "    --max-count=<n>\n"
  15 "    --max-age=<epoch>\n"
  16 "    --min-age=<epoch>\n"
  17 "    --sparse\n"
  18 "    --no-merges\n"
  19 "    --min-parents=<n>\n"
  20 "    --no-min-parents\n"
  21 "    --max-parents=<n>\n"
  22 "    --no-max-parents\n"
  23 "    --remove-empty\n"
  24 "    --all\n"
  25 "    --branches\n"
  26 "    --tags\n"
  27 "    --remotes\n"
  28 "    --stdin\n"
  29 "    --quiet\n"
  30 "  ordering output:\n"
  31 "    --topo-order\n"
  32 "    --date-order\n"
  33 "    --reverse\n"
  34 "  formatting output:\n"
  35 "    --parents\n"
  36 "    --children\n"
  37 "    --objects | --objects-edge\n"
  38 "    --unpacked\n"
  39 "    --header | --pretty\n"
  40 "    --abbrev=<n> | --no-abbrev\n"
  41 "    --abbrev-commit\n"
  42 "    --left-right\n"
  43 "  special purpose:\n"
  44 "    --bisect\n"
  45 "    --bisect-vars\n"
  46 "    --bisect-all"
  47 ;
  48
  49 static void finish_commit(struct commit *commit, void *data);
  50 static void show_commit(struct commit *commit, void *data)
  51 {
  52         struct rev_list_info *info = data;
  53         struct rev_info *revs = info->revs;
  54
  55         if (info->flags & REV_LIST_QUIET) {
  56                 finish_commit(commit, data);
  57                 return;
  58         }
  59
  60         graph_show_commit(revs->graph);
  61
  62         if (revs->count) {
  63                 if (commit->object.flags & PATCHSAME)
  64                         revs->count_same++;
  65                 else if (commit->object.flags & SYMMETRIC_LEFT)
  66                         revs->count_left++;
  67                 else
  68                         revs->count_right++;
  69                 finish_commit(commit, data);
  70                 return;
  71         }
  72
  73         if (info->show_timestamp)
  74                 printf("%lu ", commit->date);
  75         if (info->header_prefix)
  76                 fputs(info->header_prefix, stdout);
  77
  78         if (!revs->graph)
  79                 fputs(get_revision_mark(revs, commit), stdout);
  80         if (revs->abbrev_commit && revs->abbrev)
  81                 fputs(find_unique_abbrev(commit->object.sha1, revs->abbrev),
  82                       stdout);
  83         else
  84                 fputs(sha1_to_hex(commit->object.sha1), stdout);
  85         if (revs->print_parents) {
  86                 struct commit_list *parents = commit->parents;
  87                 while (parents) {
  88                         printf(" %s", sha1_to_hex(parents->item->object.sha1));
  89                         parents = parents->next;
  90                 }
  91         }
  92         if (revs->children.name) {
  93                 struct commit_list *children;
  94
  95                 children = lookup_decoration(&revs->children, &commit->object);
  96                 while (children) {
  97                         printf(" %s", sha1_to_hex(children->item->object.sha1));
  98                         children = children->next;
  99                 }
 100         }
 101         show_decorations(revs, commit);
 102         if (revs->commit_format == CMIT_FMT_ONELINE)
 103                 putchar(' ');
 104         else
 105                 putchar('\n');
 106
 107         if (revs->verbose_header && commit->buffer) {
 108                 struct strbuf buf = STRBUF_INIT;
 109                 struct pretty_print_context ctx = {0};
 110                 ctx.abbrev = revs->abbrev;
 111                 ctx.date_mode = revs->date_mode;
 112                 ctx.date_mode_explicit = revs->date_mode_explicit;
 113                 ctx.fmt = revs->commit_format;
 114                 pretty_print_commit(&ctx, commit, &buf);
 115                 if (revs->graph) {
 116                         if (buf.len) {
 117                                 if (revs->commit_format != CMIT_FMT_ONELINE)
 118                                         graph_show_oneline(revs->graph);
 119
 120                                 graph_show_commit_msg(revs->graph, &buf);
 121
 122                                 /*
 123                                  * Add a newline after the commit message.
 124                                  *
 125                                  * Usually, this newline produces a blank
 126                                  * padding line between entries, in which case
 127                                  * we need to add graph padding on this line.
 128                                  *
 129                                  * However, the commit message may not end in a
 130                                  * newline.  In this case the newline simply
 131                                  * ends the last line of the commit message,
 132                                  * and we don't need any graph output.  (This
 133                                  * always happens with CMIT_FMT_ONELINE, and it
 134                                  * happens with CMIT_FMT_USERFORMAT when the
 135                                  * format doesn't explicitly end in a newline.)
 136                                  */
 137                                 if (buf.len && buf.buf[buf.len - 1] == '\n')
 138                                         graph_show_padding(revs->graph);
 139                                 putchar('\n');
 140                         } else {
 141                                 /*
 142                                  * If the message buffer is empty, just show
 143                                  * the rest of the graph output for this
 144                                  * commit.
 145                                  */
 146                                 if (graph_show_remainder(revs->graph))
 147                                         putchar('\n');
 148                                 if (revs->commit_format == CMIT_FMT_ONELINE)
 149                                         putchar('\n');
 150                         }
 151                 } else {
 152                         if (revs->commit_format != CMIT_FMT_USERFORMAT ||
 153                             buf.len) {
 154                                 fwrite(buf.buf, 1, buf.len, stdout);
 155                                 putchar(info->hdr_termination);
 156                         }
 157                 }
 158                 strbuf_release(&buf);
 159         } else {
 160                 if (graph_show_remainder(revs->graph))
 161                         putchar('\n');
 162         }
 163         maybe_flush_or_die(stdout, "stdout");
 164         finish_commit(commit, data);
 165 }
 166
 167 static void finish_commit(struct commit *commit, void *data)
 168 {
 169         if (commit->parents) {
 170                 free_commit_list(commit->parents);
 171                 commit->parents = NULL;
 172         }
 173         free(commit->buffer);
 174         commit->buffer = NULL;
 175 }
 176
 177 static void finish_object(struct object *obj,
 178                           const struct name_path *path, const char *name,
 179                           void *cb_data)
 180 {
 181         struct rev_list_info *info = cb_data;
 182         if (obj->type == OBJ_BLOB && !has_sha1_file(obj->sha1))
 183                 die("missing blob object '%s'", sha1_to_hex(obj->sha1));
 184         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
 185                 parse_object(obj->sha1);
 186 }
 187
 188 static void show_object(struct object *obj,
 189                         const struct name_path *path, const char *component,
 190                         void *cb_data)
 191 {
 192         struct rev_list_info *info = cb_data;
 193         finish_object(obj, path, component, cb_data);
 194         if (info->flags & REV_LIST_QUIET)
 195                 return;
 196         show_object_with_name(stdout, obj, path, component);
 197 }
 198
 199 static void show_edge(struct commit *commit)
 200 {
 201         printf("-%s\n", sha1_to_hex(commit->object.sha1));
 202 }
 203
 204 void print_commit_list(struct commit_list *list,
 205                        const char *format_cur,
 206                        const char *format_last)
 207 {
 208         for ( ; list; list = list->next) {
 209                 const char *format = list->next ? format_cur : format_last;
 210                 printf(format, sha1_to_hex(list->item->object.sha1));
 211         }
 212 }
 213
 214 static void print_var_str(const char *var, const char *val)
 215 {
 216         printf("%s='%s'\n", var, val);
 217 }
 218
 219 static void print_var_int(const char *var, int val)
 220 {
 221         printf("%s=%d\n", var, val);
 222 }
 223
 224 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 225 {
 226         int cnt, flags = info->flags;
 227         char hex[41] = "";
 228         struct commit_list *tried;
 229         struct rev_info *revs = info->revs;
 230
 231         if (!revs->commits)
 232                 return 1;
 233
 234         revs->commits = filter_skipped(revs->commits, &tried,
 235                                        flags & BISECT_SHOW_ALL,
 236                                        NULL, NULL);
 237
 238         /*
 239          * revs->commits can reach "reaches" commits among
 240          * "all" commits.  If it is good, then there are
 241          * (all-reaches) commits left to be bisected.
 242          * On the other hand, if it is bad, then the set
 243          * to bisect is "reaches".
 244          * A bisect set of size N has (N-1) commits further
 245          * to test, as we already know one bad one.
 246          */
 247         cnt = all - reaches;
 248         if (cnt < reaches)
 249                 cnt = reaches;
 250
 251         if (revs->commits)
 252                 strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
 253
 254         if (flags & BISECT_SHOW_ALL) {
 255                 traverse_commit_list(revs, show_commit, show_object, info);
 256                 printf("------\n");
 257         }
 258
 259         print_var_str("bisect_rev", hex);
 260         print_var_int("bisect_nr", cnt - 1);
 261         print_var_int("bisect_good", all - reaches - 1);
 262         print_var_int("bisect_bad", reaches - 1);
 263         print_var_int("bisect_all", all);
 264         print_var_int("bisect_steps", estimate_bisect_steps(all));
 265
 266         return 0;
 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
 278         git_config(git_default_config, NULL);
 279         init_revisions(&revs, prefix);
 280         revs.abbrev = DEFAULT_ABBREV;
 281         revs.commit_format = CMIT_FMT_UNSPECIFIED;
 282         argc = setup_revisions(argc, argv, &revs, NULL);
 283
 284         memset(&info, 0, sizeof(info));
 285         info.revs = &revs;
 286         if (revs.bisect)
 287                 bisect_list = 1;
 288
 289         if (DIFF_OPT_TST(&revs.diffopt, QUICK))
 290                 info.flags |= REV_LIST_QUIET;
 291         for (i = 1 ; i < argc; i++) {
 292                 const char *arg = argv[i];
 293
 294                 if (!strcmp(arg, "--header")) {
 295                         revs.verbose_header = 1;
 296                         continue;
 297                 }
 298                 if (!strcmp(arg, "--timestamp")) {
 299                         info.show_timestamp = 1;
 300                         continue;
 301                 }
 302                 if (!strcmp(arg, "--bisect")) {
 303                         bisect_list = 1;
 304                         continue;
 305                 }
 306                 if (!strcmp(arg, "--bisect-all")) {
 307                         bisect_list = 1;
 308                         bisect_find_all = 1;
 309                         info.flags |= BISECT_SHOW_ALL;
 310                         revs.show_decorations = 1;
 311                         continue;
 312                 }
 313                 if (!strcmp(arg, "--bisect-vars")) {
 314                         bisect_list = 1;
 315                         bisect_show_vars = 1;
 316                         continue;
 317                 }
 318                 usage(rev_list_usage);
 319
 320         }
 321         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 322                 /* The command line has a --pretty  */
 323                 info.hdr_termination = '\n';
 324                 if (revs.commit_format == CMIT_FMT_ONELINE)
 325                         info.header_prefix = "";
 326                 else
 327                         info.header_prefix = "commit ";
 328         }
 329         else if (revs.verbose_header)
 330                 /* Only --header was specified */
 331                 revs.commit_format = CMIT_FMT_RAW;
 332
 333         if ((!revs.commits &&
 334              (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
 335               !revs.pending.nr)) ||
 336             revs.diff)
 337                 usage(rev_list_usage);
 338
 339         save_commit_buffer = (revs.verbose_header ||
 340                               revs.grep_filter.pattern_list ||
 341                               revs.grep_filter.header_list);
 342         if (bisect_list)
 343                 revs.limited = 1;
 344
 345         if (prepare_revision_walk(&revs))
 346                 die("revision walk setup failed");
 347         if (revs.tree_objects)
 348                 mark_edges_uninteresting(revs.commits, &revs, show_edge);
 349
 350         if (bisect_list) {
 351                 int reaches = reaches, all = all;
 352
 353                 revs.commits = find_bisection(revs.commits, &reaches, &all,
 354                                               bisect_find_all);
 355
 356                 if (bisect_show_vars)
 357                         return show_bisect_vars(&info, reaches, all);
 358         }
 359
 360         traverse_commit_list(&revs, show_commit, show_object, &info);
 361
 362         if (revs.count) {
 363                 if (revs.left_right && revs.cherry_mark)
 364                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 365                 else if (revs.left_right)
 366                         printf("%d\t%d\n", revs.count_left, revs.count_right);
 367                 else if (revs.cherry_mark)
 368                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 369                 else
 370                         printf("%d\n", revs.count_left + revs.count_right);
 371         }
 372
 373         return 0;
 374 }