GIT 1.6.5
[git/git.git] / builtin-rev-list.c
CommitLineData
64745109
LT
1#include "cache.h"
2#include "commit.h"
c4e05b1a 3#include "diff.h"
ae563542 4#include "revision.h"
c64ed70d 5#include "list-objects.h"
5fb61b8d 6#include "builtin.h"
50e62a8e 7#include "log-tree.h"
7fefda5c 8#include "graph.h"
a2ad79ce 9#include "bisect.h"
8906300f 10
a6f68d47 11static const char rev_list_usage[] =
1b1dd23f 12"git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
69e0c256
JH
13" limiting output:\n"
14" --max-count=nr\n"
15" --max-age=epoch\n"
16" --min-age=epoch\n"
17" --sparse\n"
18" --no-merges\n"
93b74bca 19" --remove-empty\n"
69e0c256 20" --all\n"
a5aa930d
UKK
21" --branches\n"
22" --tags\n"
23" --remotes\n"
42cabc34 24" --stdin\n"
27350891 25" --quiet\n"
69e0c256 26" ordering output:\n"
69e0c256 27" --topo-order\n"
4c8725f1 28" --date-order\n"
7ccd3667 29" --reverse\n"
69e0c256
JH
30" formatting output:\n"
31" --parents\n"
72276a3e 32" --children\n"
c6496575 33" --objects | --objects-edge\n"
69e0c256
JH
34" --unpacked\n"
35" --header | --pretty\n"
9da5c2f0 36" --abbrev=nr | --no-abbrev\n"
5c51c985 37" --abbrev-commit\n"
b24bace5 38" --left-right\n"
69e0c256 39" special purpose:\n"
457f08a0 40" --bisect\n"
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CC
41" --bisect-vars\n"
42" --bisect-all"
69e0c256 43;
a6f68d47 44
11c211fa
CC
45static void finish_commit(struct commit *commit, void *data);
46static void show_commit(struct commit *commit, void *data)
81f2bb1f 47{
d797257e
CC
48 struct rev_list_info *info = data;
49 struct rev_info *revs = info->revs;
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CC
50
51 graph_show_commit(revs->graph);
7fefda5c 52
d797257e 53 if (info->show_timestamp)
dc68c4ff 54 printf("%lu ", commit->date);
d797257e
CC
55 if (info->header_prefix)
56 fputs(info->header_prefix, stdout);
7528f27d 57
11c211fa 58 if (!revs->graph) {
7528f27d
AS
59 if (commit->object.flags & BOUNDARY)
60 putchar('-');
61 else if (commit->object.flags & UNINTERESTING)
62 putchar('^');
11c211fa 63 else if (revs->left_right) {
7528f27d
AS
64 if (commit->object.flags & SYMMETRIC_LEFT)
65 putchar('<');
66 else
67 putchar('>');
68 }
577ed5c2 69 }
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CC
70 if (revs->abbrev_commit && revs->abbrev)
71 fputs(find_unique_abbrev(commit->object.sha1, revs->abbrev),
7594c4b2 72 stdout);
5c51c985
JH
73 else
74 fputs(sha1_to_hex(commit->object.sha1), stdout);
11c211fa 75 if (revs->print_parents) {
81f2bb1f
LT
76 struct commit_list *parents = commit->parents;
77 while (parents) {
1ed84157 78 printf(" %s", sha1_to_hex(parents->item->object.sha1));
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LT
79 parents = parents->next;
80 }
81 }
11c211fa 82 if (revs->children.name) {
72276a3e
JH
83 struct commit_list *children;
84
11c211fa 85 children = lookup_decoration(&revs->children, &commit->object);
72276a3e
JH
86 while (children) {
87 printf(" %s", sha1_to_hex(children->item->object.sha1));
88 children = children->next;
89 }
90 }
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CC
91 show_decorations(revs, commit);
92 if (revs->commit_format == CMIT_FMT_ONELINE)
d87449c5
JH
93 putchar(' ');
94 else
95 putchar('\n');
96
11c211fa 97 if (revs->verbose_header && commit->buffer) {
f285a2d7 98 struct strbuf buf = STRBUF_INIT;
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CC
99 pretty_print_commit(revs->commit_format, commit,
100 &buf, revs->abbrev, NULL, NULL,
101 revs->date_mode, 0);
102 if (revs->graph) {
7fefda5c 103 if (buf.len) {
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CC
104 if (revs->commit_format != CMIT_FMT_ONELINE)
105 graph_show_oneline(revs->graph);
7fefda5c 106
11c211fa 107 graph_show_commit_msg(revs->graph, &buf);
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AS
108
109 /*
110 * Add a newline after the commit message.
111 *
112 * Usually, this newline produces a blank
113 * padding line between entries, in which case
114 * we need to add graph padding on this line.
115 *
116 * However, the commit message may not end in a
117 * newline. In this case the newline simply
118 * ends the last line of the commit message,
119 * and we don't need any graph output. (This
120 * always happens with CMIT_FMT_ONELINE, and it
121 * happens with CMIT_FMT_USERFORMAT when the
122 * format doesn't explicitly end in a newline.)
123 */
124 if (buf.len && buf.buf[buf.len - 1] == '\n')
11c211fa 125 graph_show_padding(revs->graph);
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AS
126 putchar('\n');
127 } else {
128 /*
129 * If the message buffer is empty, just show
130 * the rest of the graph output for this
131 * commit.
132 */
11c211fa 133 if (graph_show_remainder(revs->graph))
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AS
134 putchar('\n');
135 }
136 } else {
137 if (buf.len)
d797257e 138 printf("%s%c", buf.buf, info->hdr_termination);
7fefda5c 139 }
674d1727 140 strbuf_release(&buf);
7fefda5c 141 } else {
11c211fa 142 if (graph_show_remainder(revs->graph))
7fefda5c 143 putchar('\n');
7620d39f 144 }
06f59e9f 145 maybe_flush_or_die(stdout, "stdout");
11c211fa 146 finish_commit(commit, data);
27350891
SP
147}
148
11c211fa 149static void finish_commit(struct commit *commit, void *data)
27350891 150{
cb115748
LT
151 if (commit->parents) {
152 free_commit_list(commit->parents);
153 commit->parents = NULL;
154 }
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JH
155 free(commit->buffer);
156 commit->buffer = NULL;
a3437b8c
JS
157}
158
cf2ab916 159static void finish_object(struct object *obj, const struct name_path *path, const char *name)
27350891 160{
8d2dfc49
LT
161 if (obj->type == OBJ_BLOB && !has_sha1_file(obj->sha1))
162 die("missing blob object '%s'", sha1_to_hex(obj->sha1));
27350891
SP
163}
164
cf2ab916 165static void show_object(struct object *obj, const struct name_path *path, const char *component)
9de48752 166{
cf2ab916 167 char *name = path_name(path, component);
c64ed70d 168 /* An object with name "foo\n0000000..." can be used to
f18d244a 169 * confuse downstream "git pack-objects" very badly.
c64ed70d 170 */
8d2dfc49 171 const char *ep = strchr(name, '\n');
b9849a1a 172
cf2ab916 173 finish_object(obj, path, name);
c64ed70d 174 if (ep) {
8d2dfc49
LT
175 printf("%s %.*s\n", sha1_to_hex(obj->sha1),
176 (int) (ep - name),
177 name);
9de48752 178 }
c64ed70d 179 else
8d2dfc49 180 printf("%s %s\n", sha1_to_hex(obj->sha1), name);
cf2ab916 181 free(name);
9de48752
LT
182}
183
8d1d8f83
JH
184static void show_edge(struct commit *commit)
185{
186 printf("-%s\n", sha1_to_hex(commit->object.sha1));
187}
188
9f199b15
CC
189static inline int log2i(int n)
190{
191 int log2 = 0;
192
193 for (; n > 1; n >>= 1)
194 log2++;
195
196 return log2;
197}
198
199static inline int exp2i(int n)
200{
201 return 1 << n;
202}
203
204/*
205 * Estimate the number of bisect steps left (after the current step)
206 *
207 * For any x between 0 included and 2^n excluded, the probability for
208 * n - 1 steps left looks like:
209 *
210 * P(2^n + x) == (2^n - x) / (2^n + x)
211 *
212 * and P(2^n + x) < 0.5 means 2^n < 3x
213 */
1c876546 214int estimate_bisect_steps(int all)
9f199b15
CC
215{
216 int n, x, e;
217
218 if (all < 3)
219 return 0;
220
221 n = log2i(all);
222 e = exp2i(n);
223 x = all - e;
224
225 return (e < 3 * x) ? n : n - 1;
226}
227
280e65cb
CC
228void print_commit_list(struct commit_list *list,
229 const char *format_cur,
230 const char *format_last)
231{
232 for ( ; list; list = list->next) {
233 const char *format = list->next ? format_cur : format_last;
234 printf(format, sha1_to_hex(list->item->object.sha1));
235 }
236}
237
38ef7507 238static void show_tried_revs(struct commit_list *tried)
95188648
CC
239{
240 printf("bisect_tried='");
280e65cb 241 print_commit_list(tried, "%s|", "%s");
38ef7507 242 printf("'\n");
95188648
CC
243}
244
38ef7507 245static void print_var_str(const char *var, const char *val)
280e65cb 246{
38ef7507 247 printf("%s='%s'\n", var, val);
280e65cb
CC
248}
249
38ef7507 250static void print_var_int(const char *var, int val)
280e65cb 251{
38ef7507 252 printf("%s=%d\n", var, val);
280e65cb
CC
253}
254
13858e57 255int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
9996983c 256{
38ef7507 257 int cnt, flags = info->bisect_show_flags;
280e65cb 258 char hex[41] = "";
95188648 259 struct commit_list *tried;
d797257e 260 struct rev_info *revs = info->revs;
9996983c 261
37c4c38d 262 if (!revs->commits && !(flags & BISECT_SHOW_TRIED))
9996983c
CC
263 return 1;
264
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CC
265 revs->commits = filter_skipped(revs->commits, &tried,
266 flags & BISECT_SHOW_ALL,
267 NULL, NULL);
95188648 268
9996983c 269 /*
7428d754 270 * revs->commits can reach "reaches" commits among
9996983c
CC
271 * "all" commits. If it is good, then there are
272 * (all-reaches) commits left to be bisected.
273 * On the other hand, if it is bad, then the set
274 * to bisect is "reaches".
275 * A bisect set of size N has (N-1) commits further
276 * to test, as we already know one bad one.
277 */
278 cnt = all - reaches;
279 if (cnt < reaches)
280 cnt = reaches;
6a17fad7 281
95188648
CC
282 if (revs->commits)
283 strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
9996983c 284
37c4c38d 285 if (flags & BISECT_SHOW_ALL) {
d797257e 286 traverse_commit_list(revs, show_commit, show_object, info);
9996983c
CC
287 printf("------\n");
288 }
289
37c4c38d 290 if (flags & BISECT_SHOW_TRIED)
38ef7507
CC
291 show_tried_revs(tried);
292
293 print_var_str("bisect_rev", hex);
294 print_var_int("bisect_nr", cnt - 1);
295 print_var_int("bisect_good", all - reaches - 1);
296 print_var_int("bisect_bad", reaches - 1);
297 print_var_int("bisect_all", all);
298 print_var_int("bisect_steps", estimate_bisect_steps(all));
9996983c
CC
299
300 return 0;
301}
302
a633fca0 303int cmd_rev_list(int argc, const char **argv, const char *prefix)
64745109 304{
11c211fa 305 struct rev_info revs;
d797257e 306 struct rev_list_info info;
d9a83684 307 int i;
42cabc34 308 int read_from_stdin = 0;
ff62d732 309 int bisect_list = 0;
457f08a0 310 int bisect_show_vars = 0;
50e62a8e 311 int bisect_find_all = 0;
27350891 312 int quiet = 0;
64745109 313
ef90d6d4 314 git_config(git_default_config, NULL);
a633fca0 315 init_revisions(&revs, prefix);
7594c4b2
JH
316 revs.abbrev = 0;
317 revs.commit_format = CMIT_FMT_UNSPECIFIED;
a4a88b2b 318 argc = setup_revisions(argc, argv, &revs, NULL);
ae563542 319
d797257e
CC
320 memset(&info, 0, sizeof(info));
321 info.revs = &revs;
322
d85fe389 323 quiet = DIFF_OPT_TST(&revs.diffopt, QUIET);
fcfda02b 324 for (i = 1 ; i < argc; i++) {
cf484544 325 const char *arg = argv[i];
fcfda02b 326
a6f68d47 327 if (!strcmp(arg, "--header")) {
7594c4b2 328 revs.verbose_header = 1;
9d97aa64
LT
329 continue;
330 }
dc68c4ff 331 if (!strcmp(arg, "--timestamp")) {
d797257e 332 info.show_timestamp = 1;
dc68c4ff
JH
333 continue;
334 }
8b3a1e05
LT
335 if (!strcmp(arg, "--bisect")) {
336 bisect_list = 1;
337 continue;
338 }
50e62a8e
CC
339 if (!strcmp(arg, "--bisect-all")) {
340 bisect_list = 1;
341 bisect_find_all = 1;
13858e57 342 info.bisect_show_flags = BISECT_SHOW_ALL;
6e46cc0d 343 revs.show_decorations = 1;
50e62a8e
CC
344 continue;
345 }
457f08a0
JH
346 if (!strcmp(arg, "--bisect-vars")) {
347 bisect_list = 1;
348 bisect_show_vars = 1;
349 continue;
350 }
42cabc34
JH
351 if (!strcmp(arg, "--stdin")) {
352 if (read_from_stdin++)
353 die("--stdin given twice?");
354 read_revisions_from_stdin(&revs);
355 continue;
356 }
ae563542 357 usage(rev_list_usage);
a6f68d47 358
fcfda02b 359 }
7594c4b2
JH
360 if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
361 /* The command line has a --pretty */
d797257e 362 info.hdr_termination = '\n';
7594c4b2 363 if (revs.commit_format == CMIT_FMT_ONELINE)
d797257e 364 info.header_prefix = "";
7594c4b2 365 else
d797257e 366 info.header_prefix = "commit ";
7594c4b2 367 }
db89665f
JH
368 else if (revs.verbose_header)
369 /* Only --header was specified */
370 revs.commit_format = CMIT_FMT_RAW;
fcfda02b 371
d797257e 372 if ((!revs.commits &&
8c1f0b44 373 (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
1f1e895f 374 !revs.pending.nr)) ||
8c1f0b44 375 revs.diff)
7b34c2fa
LT
376 usage(rev_list_usage);
377
0843acfd
JK
378 save_commit_buffer = revs.verbose_header ||
379 revs.grep_filter.pattern_list;
4e1dc640
JH
380 if (bisect_list)
381 revs.limited = 1;
9181ca2c 382
3d51e1b5
MK
383 if (prepare_revision_walk(&revs))
384 die("revision walk setup failed");
a4a88b2b 385 if (revs.tree_objects)
8d1d8f83 386 mark_edges_uninteresting(revs.commits, &revs, show_edge);
a4a88b2b 387
457f08a0
JH
388 if (bisect_list) {
389 int reaches = reaches, all = all;
390
50e62a8e
CC
391 revs.commits = find_bisection(revs.commits, &reaches, &all,
392 bisect_find_all);
95188648 393
9996983c 394 if (bisect_show_vars)
13858e57 395 return show_bisect_vars(&info, reaches, all);
457f08a0 396 }
7b34c2fa 397
27350891 398 traverse_commit_list(&revs,
11c211fa
CC
399 quiet ? finish_commit : show_commit,
400 quiet ? finish_object : show_object,
d797257e 401 &info);
8906300f 402
64745109
LT
403 return 0;
404}