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                 ctx.output_encoding = get_log_output_encoding();
 115                 pretty_print_commit(&ctx, commit, &buf);
 116                 if (revs->graph) {
 117                         if (buf.len) {
 118                                 if (revs->commit_format != CMIT_FMT_ONELINE)
 119                                         graph_show_oneline(revs->graph);
 120
 121                                 graph_show_commit_msg(revs->graph, &buf);
 122
 123                                 /*
 124                                  * Add a newline after the commit message.
 125                                  *
 126                                  * Usually, this newline produces a blank
 127                                  * padding line between entries, in which case
 128                                  * we need to add graph padding on this line.
 129                                  *
 130                                  * However, the commit message may not end in a
 131                                  * newline.  In this case the newline simply
 132                                  * ends the last line of the commit message,
 133                                  * and we don't need any graph output.  (This
 134                                  * always happens with CMIT_FMT_ONELINE, and it
 135                                  * happens with CMIT_FMT_USERFORMAT when the
 136                                  * format doesn't explicitly end in a newline.)
 137                                  */
 138                                 if (buf.len && buf.buf[buf.len - 1] == '\n')
 139                                         graph_show_padding(revs->graph);
 140                                 putchar('\n');
 141                         } else {
 142                                 /*
 143                                  * If the message buffer is empty, just show
 144                                  * the rest of the graph output for this
 145                                  * commit.
 146                                  */
 147                                 if (graph_show_remainder(revs->graph))
 148                                         putchar('\n');
 149                                 if (revs->commit_format == CMIT_FMT_ONELINE)
 150                                         putchar('\n');
 151                         }
 152                 } else {
 153                         if (revs->commit_format != CMIT_FMT_USERFORMAT ||
 154                             buf.len) {
 155                                 fwrite(buf.buf, 1, buf.len, stdout);
 156                                 putchar(info->hdr_termination);
 157                         }
 158                 }
 159                 strbuf_release(&buf);
 160         } else {
 161                 if (graph_show_remainder(revs->graph))
 162                         putchar('\n');
 163         }
 164         maybe_flush_or_die(stdout, "stdout");
 165         finish_commit(commit, data);
 166 }
 167
 168 static void finish_commit(struct commit *commit, void *data)
 169 {
 170         if (commit->parents) {
 171                 free_commit_list(commit->parents);
 172                 commit->parents = NULL;
 173         }
 174         free(commit->buffer);
 175         commit->buffer = NULL;
 176 }
 177
 178 static void finish_object(struct object *obj,
 179                           const struct name_path *path, const char *name,
 180                           void *cb_data)
 181 {
 182         struct rev_list_info *info = cb_data;
 183         if (obj->type == OBJ_BLOB && !has_sha1_file(obj->sha1))
 184                 die("missing blob object '%s'", sha1_to_hex(obj->sha1));
 185         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
 186                 parse_object(obj->sha1);
 187 }
 188
 189 static void show_object(struct object *obj,
 190                         const struct name_path *path, const char *component,
 191                         void *cb_data)
 192 {
 193         struct rev_list_info *info = cb_data;
 194         finish_object(obj, path, component, cb_data);
 195         if (info->flags & REV_LIST_QUIET)
 196                 return;
 197         show_object_with_name(stdout, obj, path, component);
 198 }
 199
 200 static void show_edge(struct commit *commit)
 201 {
 202         printf("-%s\n", sha1_to_hex(commit->object.sha1));
 203 }
 204
 205 static void print_var_str(const char *var, const char *val)
 206 {
 207         printf("%s='%s'\n", var, val);
 208 }
 209
 210 static void print_var_int(const char *var, int val)
 211 {
 212         printf("%s=%d\n", var, val);
 213 }
 214
 215 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 216 {
 217         int cnt, flags = info->flags;
 218         char hex[41] = "";
 219         struct commit_list *tried;
 220         struct rev_info *revs = info->revs;
 221
 222         if (!revs->commits)
 223                 return 1;
 224
 225         revs->commits = filter_skipped(revs->commits, &tried,
 226                                        flags & BISECT_SHOW_ALL,
 227                                        NULL, NULL);
 228
 229         /*
 230          * revs->commits can reach "reaches" commits among
 231          * "all" commits.  If it is good, then there are
 232          * (all-reaches) commits left to be bisected.
 233          * On the other hand, if it is bad, then the set
 234          * to bisect is "reaches".
 235          * A bisect set of size N has (N-1) commits further
 236          * to test, as we already know one bad one.
 237          */
 238         cnt = all - reaches;
 239         if (cnt < reaches)
 240                 cnt = reaches;
 241
 242         if (revs->commits)
 243                 strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
 244
 245         if (flags & BISECT_SHOW_ALL) {
 246                 traverse_commit_list(revs, show_commit, show_object, info);
 247                 printf("------\n");
 248         }
 249
 250         print_var_str("bisect_rev", hex);
 251         print_var_int("bisect_nr", cnt - 1);
 252         print_var_int("bisect_good", all - reaches - 1);
 253         print_var_int("bisect_bad", reaches - 1);
 254         print_var_int("bisect_all", all);
 255         print_var_int("bisect_steps", estimate_bisect_steps(all));
 256
 257         return 0;
 258 }
 259
 260 int cmd_rev_list(int argc, const char **argv, const char *prefix)
 261 {
 262         struct rev_info revs;
 263         struct rev_list_info info;
 264         int i;
 265         int bisect_list = 0;
 266         int bisect_show_vars = 0;
 267         int bisect_find_all = 0;
 268
 269         git_config(git_default_config, NULL);
 270         init_revisions(&revs, prefix);
 271         revs.abbrev = DEFAULT_ABBREV;
 272         revs.commit_format = CMIT_FMT_UNSPECIFIED;
 273         argc = setup_revisions(argc, argv, &revs, NULL);
 274
 275         memset(&info, 0, sizeof(info));
 276         info.revs = &revs;
 277         if (revs.bisect)
 278                 bisect_list = 1;
 279
 280         if (DIFF_OPT_TST(&revs.diffopt, QUICK))
 281                 info.flags |= REV_LIST_QUIET;
 282         for (i = 1 ; i < argc; i++) {
 283                 const char *arg = argv[i];
 284
 285                 if (!strcmp(arg, "--header")) {
 286                         revs.verbose_header = 1;
 287                         continue;
 288                 }
 289                 if (!strcmp(arg, "--timestamp")) {
 290                         info.show_timestamp = 1;
 291                         continue;
 292                 }
 293                 if (!strcmp(arg, "--bisect")) {
 294                         bisect_list = 1;
 295                         continue;
 296                 }
 297                 if (!strcmp(arg, "--bisect-all")) {
 298                         bisect_list = 1;
 299                         bisect_find_all = 1;
 300                         info.flags |= BISECT_SHOW_ALL;
 301                         revs.show_decorations = 1;
 302                         continue;
 303                 }
 304                 if (!strcmp(arg, "--bisect-vars")) {
 305                         bisect_list = 1;
 306                         bisect_show_vars = 1;
 307                         continue;
 308                 }
 309                 usage(rev_list_usage);
 310
 311         }
 312         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 313                 /* The command line has a --pretty  */
 314                 info.hdr_termination = '\n';
 315                 if (revs.commit_format == CMIT_FMT_ONELINE)
 316                         info.header_prefix = "";
 317                 else
 318                         info.header_prefix = "commit ";
 319         }
 320         else if (revs.verbose_header)
 321                 /* Only --header was specified */
 322                 revs.commit_format = CMIT_FMT_RAW;
 323
 324         if ((!revs.commits &&
 325              (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
 326               !revs.pending.nr)) ||
 327             revs.diff)
 328                 usage(rev_list_usage);
 329
 330         save_commit_buffer = (revs.verbose_header ||
 331                               revs.grep_filter.pattern_list ||
 332                               revs.grep_filter.header_list);
 333         if (bisect_list)
 334                 revs.limited = 1;
 335
 336         if (prepare_revision_walk(&revs))
 337                 die("revision walk setup failed");
 338         if (revs.tree_objects)
 339                 mark_edges_uninteresting(revs.commits, &revs, show_edge);
 340
 341         if (bisect_list) {
 342                 int reaches = reaches, all = all;
 343
 344                 revs.commits = find_bisection(revs.commits, &reaches, &all,
 345                                               bisect_find_all);
 346
 347                 if (bisect_show_vars)
 348                         return show_bisect_vars(&info, reaches, all);
 349         }
 350
 351         traverse_commit_list(&revs, show_commit, show_object, &info);
 352
 353         if (revs.count) {
 354                 if (revs.left_right && revs.cherry_mark)
 355                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 356                 else if (revs.left_right)
 357                         printf("%d\t%d\n", revs.count_left, revs.count_right);
 358                 else if (revs.cherry_mark)
 359                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 360                 else
 361                         printf("%d\n", revs.count_left + revs.count_right);
 362         }
 363
 364         return 0;
 365 }