Git 2.14.1
[git] / 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                 pretty_print_commit(&ctx, commit, &buf);
126                 if (buf.len) {
127                         if (revs->commit_format != CMIT_FMT_ONELINE)
128                                 graph_show_oneline(revs->graph);
129
130                         graph_show_commit_msg(revs->graph, stdout, &buf);
131
132                         /*
133                          * Add a newline after the commit message.
134                          *
135                          * Usually, this newline produces a blank
136                          * padding line between entries, in which case
137                          * we need to add graph padding on this line.
138                          *
139                          * However, the commit message may not end in a
140                          * newline.  In this case the newline simply
141                          * ends the last line of the commit message,
142                          * and we don't need any graph output.  (This
143                          * always happens with CMIT_FMT_ONELINE, and it
144                          * happens with CMIT_FMT_USERFORMAT when the
145                          * format doesn't explicitly end in a newline.)
146                          */
147                         if (buf.len && buf.buf[buf.len - 1] == '\n')
148                                 graph_show_padding(revs->graph);
149                         putchar(info->hdr_termination);
150                 } else {
151                         /*
152                          * If the message buffer is empty, just show
153                          * the rest of the graph output for this
154                          * commit.
155                          */
156                         if (graph_show_remainder(revs->graph))
157                                 putchar('\n');
158                         if (revs->commit_format == CMIT_FMT_ONELINE)
159                                 putchar('\n');
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, const char *name, void *cb_data)
180 {
181         struct rev_list_info *info = cb_data;
182         if (obj->type == OBJ_BLOB && !has_object_file(&obj->oid))
183                 die("missing blob object '%s'", oid_to_hex(&obj->oid));
184         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
185                 parse_object(&obj->oid);
186 }
187
188 static void show_object(struct object *obj, const char *name, void *cb_data)
189 {
190         struct rev_list_info *info = cb_data;
191         finish_object(obj, name, cb_data);
192         display_progress(progress, ++progress_counter);
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_MAX_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                 oid_to_hex_r(hex, &revs->commits->item->object.oid);
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         const char *show_progress = NULL;
280
281         if (argc == 2 && !strcmp(argv[1], "-h"))
282                 usage(rev_list_usage);
283
284         git_config(git_default_config, NULL);
285         init_revisions(&revs, prefix);
286         revs.abbrev = DEFAULT_ABBREV;
287         revs.commit_format = CMIT_FMT_UNSPECIFIED;
288         argc = setup_revisions(argc, argv, &revs, NULL);
289
290         memset(&info, 0, sizeof(info));
291         info.revs = &revs;
292         if (revs.bisect)
293                 bisect_list = 1;
294
295         if (DIFF_OPT_TST(&revs.diffopt, QUICK))
296                 info.flags |= REV_LIST_QUIET;
297         for (i = 1 ; i < argc; i++) {
298                 const char *arg = argv[i];
299
300                 if (!strcmp(arg, "--header")) {
301                         revs.verbose_header = 1;
302                         continue;
303                 }
304                 if (!strcmp(arg, "--timestamp")) {
305                         info.show_timestamp = 1;
306                         continue;
307                 }
308                 if (!strcmp(arg, "--bisect")) {
309                         bisect_list = 1;
310                         continue;
311                 }
312                 if (!strcmp(arg, "--bisect-all")) {
313                         bisect_list = 1;
314                         bisect_find_all = 1;
315                         info.flags |= BISECT_SHOW_ALL;
316                         revs.show_decorations = 1;
317                         continue;
318                 }
319                 if (!strcmp(arg, "--bisect-vars")) {
320                         bisect_list = 1;
321                         bisect_show_vars = 1;
322                         continue;
323                 }
324                 if (!strcmp(arg, "--use-bitmap-index")) {
325                         use_bitmap_index = 1;
326                         continue;
327                 }
328                 if (!strcmp(arg, "--test-bitmap")) {
329                         test_bitmap_walk(&revs);
330                         return 0;
331                 }
332                 if (skip_prefix(arg, "--progress=", &arg)) {
333                         show_progress = arg;
334                         continue;
335                 }
336                 usage(rev_list_usage);
337
338         }
339         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
340                 /* The command line has a --pretty  */
341                 info.hdr_termination = '\n';
342                 if (revs.commit_format == CMIT_FMT_ONELINE)
343                         info.header_prefix = "";
344                 else
345                         info.header_prefix = "commit ";
346         }
347         else if (revs.verbose_header)
348                 /* Only --header was specified */
349                 revs.commit_format = CMIT_FMT_RAW;
350
351         if ((!revs.commits &&
352              (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
353               !revs.pending.nr)) ||
354             revs.diff)
355                 usage(rev_list_usage);
356
357         if (revs.show_notes)
358                 die(_("rev-list does not support display of notes"));
359
360         save_commit_buffer = (revs.verbose_header ||
361                               revs.grep_filter.pattern_list ||
362                               revs.grep_filter.header_list);
363         if (bisect_list)
364                 revs.limited = 1;
365
366         if (show_progress)
367                 progress = start_progress_delay(show_progress, 0, 0, 2);
368
369         if (use_bitmap_index && !revs.prune) {
370                 if (revs.count && !revs.left_right && !revs.cherry_mark) {
371                         uint32_t commit_count;
372                         int max_count = revs.max_count;
373                         if (!prepare_bitmap_walk(&revs)) {
374                                 count_bitmap_commit_list(&commit_count, NULL, NULL, NULL);
375                                 if (max_count >= 0 && max_count < commit_count)
376                                         commit_count = max_count;
377                                 printf("%d\n", commit_count);
378                                 return 0;
379                         }
380                 } else if (revs.max_count < 0 &&
381                            revs.tag_objects && revs.tree_objects && revs.blob_objects) {
382                         if (!prepare_bitmap_walk(&revs)) {
383                                 traverse_bitmap_commit_list(&show_object_fast);
384                                 return 0;
385                         }
386                 }
387         }
388
389         if (prepare_revision_walk(&revs))
390                 die("revision walk setup failed");
391         if (revs.tree_objects)
392                 mark_edges_uninteresting(&revs, show_edge);
393
394         if (bisect_list) {
395                 int reaches = reaches, all = all;
396
397                 revs.commits = find_bisection(revs.commits, &reaches, &all,
398                                               bisect_find_all);
399
400                 if (bisect_show_vars)
401                         return show_bisect_vars(&info, reaches, all);
402         }
403
404         traverse_commit_list(&revs, show_commit, show_object, &info);
405
406         stop_progress(&progress);
407
408         if (revs.count) {
409                 if (revs.left_right && revs.cherry_mark)
410                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
411                 else if (revs.left_right)
412                         printf("%d\t%d\n", revs.count_left, revs.count_right);
413                 else if (revs.cherry_mark)
414                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
415                 else
416                         printf("%d\n", revs.count_left + revs.count_right);
417         }
418
419         return 0;
420 }