Merge branch 'cb/maint-ls-files-error-report'
[git/jrn.git] / builtin / rev-list.c
blob56727e8c1d9d87fe3e3bf3919ba86d27d0735758
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"
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"
49 static void finish_commit(struct commit *commit, void *data);
50 static void show_commit(struct commit *commit, void *data)
52 struct rev_list_info *info = data;
53 struct rev_info *revs = info->revs;
55 graph_show_commit(revs->graph);
57 if (revs->count) {
58 if (commit->object.flags & PATCHSAME)
59 revs->count_same++;
60 else if (commit->object.flags & SYMMETRIC_LEFT)
61 revs->count_left++;
62 else
63 revs->count_right++;
64 finish_commit(commit, data);
65 return;
68 if (info->show_timestamp)
69 printf("%lu ", commit->date);
70 if (info->header_prefix)
71 fputs(info->header_prefix, stdout);
73 if (!revs->graph)
74 fputs(get_revision_mark(revs, commit), stdout);
75 if (revs->abbrev_commit && revs->abbrev)
76 fputs(find_unique_abbrev(commit->object.sha1, revs->abbrev),
77 stdout);
78 else
79 fputs(sha1_to_hex(commit->object.sha1), stdout);
80 if (revs->print_parents) {
81 struct commit_list *parents = commit->parents;
82 while (parents) {
83 printf(" %s", sha1_to_hex(parents->item->object.sha1));
84 parents = parents->next;
87 if (revs->children.name) {
88 struct commit_list *children;
90 children = lookup_decoration(&revs->children, &commit->object);
91 while (children) {
92 printf(" %s", sha1_to_hex(children->item->object.sha1));
93 children = children->next;
96 show_decorations(revs, commit);
97 if (revs->commit_format == CMIT_FMT_ONELINE)
98 putchar(' ');
99 else
100 putchar('\n');
102 if (revs->verbose_header && commit->buffer) {
103 struct strbuf buf = STRBUF_INIT;
104 struct pretty_print_context ctx = {0};
105 ctx.abbrev = revs->abbrev;
106 ctx.date_mode = revs->date_mode;
107 ctx.fmt = revs->commit_format;
108 pretty_print_commit(&ctx, commit, &buf);
109 if (revs->graph) {
110 if (buf.len) {
111 if (revs->commit_format != CMIT_FMT_ONELINE)
112 graph_show_oneline(revs->graph);
114 graph_show_commit_msg(revs->graph, &buf);
117 * Add a newline after the commit message.
119 * Usually, this newline produces a blank
120 * padding line between entries, in which case
121 * we need to add graph padding on this line.
123 * However, the commit message may not end in a
124 * newline. In this case the newline simply
125 * ends the last line of the commit message,
126 * and we don't need any graph output. (This
127 * always happens with CMIT_FMT_ONELINE, and it
128 * happens with CMIT_FMT_USERFORMAT when the
129 * format doesn't explicitly end in a newline.)
131 if (buf.len && buf.buf[buf.len - 1] == '\n')
132 graph_show_padding(revs->graph);
133 putchar('\n');
134 } else {
136 * If the message buffer is empty, just show
137 * the rest of the graph output for this
138 * commit.
140 if (graph_show_remainder(revs->graph))
141 putchar('\n');
142 if (revs->commit_format == CMIT_FMT_ONELINE)
143 putchar('\n');
145 } else {
146 if (revs->commit_format != CMIT_FMT_USERFORMAT ||
147 buf.len) {
148 fwrite(buf.buf, 1, buf.len, stdout);
149 putchar(info->hdr_termination);
152 strbuf_release(&buf);
153 } else {
154 if (graph_show_remainder(revs->graph))
155 putchar('\n');
157 maybe_flush_or_die(stdout, "stdout");
158 finish_commit(commit, data);
161 static void finish_commit(struct commit *commit, void *data)
163 if (commit->parents) {
164 free_commit_list(commit->parents);
165 commit->parents = NULL;
167 free(commit->buffer);
168 commit->buffer = NULL;
171 static void finish_object(struct object *obj, const struct name_path *path, const char *name)
173 if (obj->type == OBJ_BLOB && !has_sha1_file(obj->sha1))
174 die("missing blob object '%s'", sha1_to_hex(obj->sha1));
177 static void show_object(struct object *obj, const struct name_path *path, const char *component)
179 char *name = path_name(path, component);
180 /* An object with name "foo\n0000000..." can be used to
181 * confuse downstream "git pack-objects" very badly.
183 const char *ep = strchr(name, '\n');
185 finish_object(obj, path, name);
186 if (ep) {
187 printf("%s %.*s\n", sha1_to_hex(obj->sha1),
188 (int) (ep - name),
189 name);
191 else
192 printf("%s %s\n", sha1_to_hex(obj->sha1), name);
193 free(name);
196 static void show_edge(struct commit *commit)
198 printf("-%s\n", sha1_to_hex(commit->object.sha1));
201 static inline int log2i(int n)
203 int log2 = 0;
205 for (; n > 1; n >>= 1)
206 log2++;
208 return log2;
211 static inline int exp2i(int n)
213 return 1 << n;
217 * Estimate the number of bisect steps left (after the current step)
219 * For any x between 0 included and 2^n excluded, the probability for
220 * n - 1 steps left looks like:
222 * P(2^n + x) == (2^n - x) / (2^n + x)
224 * and P(2^n + x) < 0.5 means 2^n < 3x
226 int estimate_bisect_steps(int all)
228 int n, x, e;
230 if (all < 3)
231 return 0;
233 n = log2i(all);
234 e = exp2i(n);
235 x = all - e;
237 return (e < 3 * x) ? n : n - 1;
240 void print_commit_list(struct commit_list *list,
241 const char *format_cur,
242 const char *format_last)
244 for ( ; list; list = list->next) {
245 const char *format = list->next ? format_cur : format_last;
246 printf(format, sha1_to_hex(list->item->object.sha1));
250 static void show_tried_revs(struct commit_list *tried)
252 printf("bisect_tried='");
253 print_commit_list(tried, "%s|", "%s");
254 printf("'\n");
257 static void print_var_str(const char *var, const char *val)
259 printf("%s='%s'\n", var, val);
262 static void print_var_int(const char *var, int val)
264 printf("%s=%d\n", var, val);
267 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
269 int cnt, flags = info->bisect_show_flags;
270 char hex[41] = "";
271 struct commit_list *tried;
272 struct rev_info *revs = info->revs;
274 if (!revs->commits && !(flags & BISECT_SHOW_TRIED))
275 return 1;
277 revs->commits = filter_skipped(revs->commits, &tried,
278 flags & BISECT_SHOW_ALL,
279 NULL, NULL);
282 * revs->commits can reach "reaches" commits among
283 * "all" commits. If it is good, then there are
284 * (all-reaches) commits left to be bisected.
285 * On the other hand, if it is bad, then the set
286 * to bisect is "reaches".
287 * A bisect set of size N has (N-1) commits further
288 * to test, as we already know one bad one.
290 cnt = all - reaches;
291 if (cnt < reaches)
292 cnt = reaches;
294 if (revs->commits)
295 strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
297 if (flags & BISECT_SHOW_ALL) {
298 traverse_commit_list(revs, show_commit, show_object, info);
299 printf("------\n");
302 if (flags & BISECT_SHOW_TRIED)
303 show_tried_revs(tried);
305 print_var_str("bisect_rev", hex);
306 print_var_int("bisect_nr", cnt - 1);
307 print_var_int("bisect_good", all - reaches - 1);
308 print_var_int("bisect_bad", reaches - 1);
309 print_var_int("bisect_all", all);
310 print_var_int("bisect_steps", estimate_bisect_steps(all));
312 return 0;
315 int cmd_rev_list(int argc, const char **argv, const char *prefix)
317 struct rev_info revs;
318 struct rev_list_info info;
319 int i;
320 int bisect_list = 0;
321 int bisect_show_vars = 0;
322 int bisect_find_all = 0;
323 int quiet = 0;
325 git_config(git_default_config, NULL);
326 init_revisions(&revs, prefix);
327 revs.abbrev = DEFAULT_ABBREV;
328 revs.commit_format = CMIT_FMT_UNSPECIFIED;
329 argc = setup_revisions(argc, argv, &revs, NULL);
331 memset(&info, 0, sizeof(info));
332 info.revs = &revs;
333 if (revs.bisect)
334 bisect_list = 1;
336 quiet = DIFF_OPT_TST(&revs.diffopt, QUICK);
337 for (i = 1 ; i < argc; i++) {
338 const char *arg = argv[i];
340 if (!strcmp(arg, "--header")) {
341 revs.verbose_header = 1;
342 continue;
344 if (!strcmp(arg, "--timestamp")) {
345 info.show_timestamp = 1;
346 continue;
348 if (!strcmp(arg, "--bisect")) {
349 bisect_list = 1;
350 continue;
352 if (!strcmp(arg, "--bisect-all")) {
353 bisect_list = 1;
354 bisect_find_all = 1;
355 info.bisect_show_flags = BISECT_SHOW_ALL;
356 revs.show_decorations = 1;
357 continue;
359 if (!strcmp(arg, "--bisect-vars")) {
360 bisect_list = 1;
361 bisect_show_vars = 1;
362 continue;
364 usage(rev_list_usage);
367 if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
368 /* The command line has a --pretty */
369 info.hdr_termination = '\n';
370 if (revs.commit_format == CMIT_FMT_ONELINE)
371 info.header_prefix = "";
372 else
373 info.header_prefix = "commit ";
375 else if (revs.verbose_header)
376 /* Only --header was specified */
377 revs.commit_format = CMIT_FMT_RAW;
379 if ((!revs.commits &&
380 (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
381 !revs.pending.nr)) ||
382 revs.diff)
383 usage(rev_list_usage);
385 save_commit_buffer = (revs.verbose_header ||
386 revs.grep_filter.pattern_list ||
387 revs.grep_filter.header_list);
388 if (bisect_list)
389 revs.limited = 1;
391 if (prepare_revision_walk(&revs))
392 die("revision walk setup failed");
393 if (revs.tree_objects)
394 mark_edges_uninteresting(revs.commits, &revs, show_edge);
396 if (bisect_list) {
397 int reaches = reaches, all = all;
399 revs.commits = find_bisection(revs.commits, &reaches, &all,
400 bisect_find_all);
402 if (bisect_show_vars)
403 return show_bisect_vars(&info, reaches, all);
406 traverse_commit_list(&revs,
407 quiet ? finish_commit : show_commit,
408 quiet ? finish_object : show_object,
409 &info);
411 if (revs.count) {
412 if (revs.left_right && revs.cherry_mark)
413 printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
414 else if (revs.left_right)
415 printf("%d\t%d\n", revs.count_left, revs.count_right);
416 else if (revs.cherry_mark)
417 printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
418 else
419 printf("%d\n", revs.count_left + revs.count_right);
422 return 0;