revision.c: update show_object_with_name() without using malloc()
[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 13" limiting output:\n"
62b4698e
ŠN
14" --max-count=<n>\n"
15" --max-age=<epoch>\n"
16" --min-age=<epoch>\n"
69e0c256
JH
17" --sparse\n"
18" --no-merges\n"
ad5aeede
MG
19" --min-parents=<n>\n"
20" --no-min-parents\n"
21" --max-parents=<n>\n"
22" --no-max-parents\n"
93b74bca 23" --remove-empty\n"
69e0c256 24" --all\n"
a5aa930d
UKK
25" --branches\n"
26" --tags\n"
27" --remotes\n"
42cabc34 28" --stdin\n"
27350891 29" --quiet\n"
69e0c256 30" ordering output:\n"
69e0c256 31" --topo-order\n"
4c8725f1 32" --date-order\n"
7ccd3667 33" --reverse\n"
69e0c256
JH
34" formatting output:\n"
35" --parents\n"
72276a3e 36" --children\n"
c6496575 37" --objects | --objects-edge\n"
69e0c256
JH
38" --unpacked\n"
39" --header | --pretty\n"
62b4698e 40" --abbrev=<n> | --no-abbrev\n"
5c51c985 41" --abbrev-commit\n"
b24bace5 42" --left-right\n"
69e0c256 43" special purpose:\n"
457f08a0 44" --bisect\n"
50e62a8e
CC
45" --bisect-vars\n"
46" --bisect-all"
69e0c256 47;
a6f68d47 48
11c211fa
CC
49static void finish_commit(struct commit *commit, void *data);
50static void show_commit(struct commit *commit, void *data)
81f2bb1f 51{
d797257e
CC
52 struct rev_list_info *info = data;
53 struct rev_info *revs = info->revs;
11c211fa
CC
54
55 graph_show_commit(revs->graph);
7fefda5c 56
f69c5018 57 if (revs->count) {
b388e14b
MG
58 if (commit->object.flags & PATCHSAME)
59 revs->count_same++;
60 else if (commit->object.flags & SYMMETRIC_LEFT)
f69c5018
TR
61 revs->count_left++;
62 else
63 revs->count_right++;
64 finish_commit(commit, data);
65 return;
66 }
67
d797257e 68 if (info->show_timestamp)
dc68c4ff 69 printf("%lu ", commit->date);
d797257e
CC
70 if (info->header_prefix)
71 fputs(info->header_prefix, stdout);
7528f27d 72
1df2d656
MG
73 if (!revs->graph)
74 fputs(get_revision_mark(revs, commit), stdout);
11c211fa
CC
75 if (revs->abbrev_commit && revs->abbrev)
76 fputs(find_unique_abbrev(commit->object.sha1, revs->abbrev),
7594c4b2 77 stdout);
5c51c985
JH
78 else
79 fputs(sha1_to_hex(commit->object.sha1), stdout);
11c211fa 80 if (revs->print_parents) {
81f2bb1f
LT
81 struct commit_list *parents = commit->parents;
82 while (parents) {
1ed84157 83 printf(" %s", sha1_to_hex(parents->item->object.sha1));
81f2bb1f
LT
84 parents = parents->next;
85 }
86 }
11c211fa 87 if (revs->children.name) {
72276a3e
JH
88 struct commit_list *children;
89
11c211fa 90 children = lookup_decoration(&revs->children, &commit->object);
72276a3e
JH
91 while (children) {
92 printf(" %s", sha1_to_hex(children->item->object.sha1));
93 children = children->next;
94 }
95 }
11c211fa
CC
96 show_decorations(revs, commit);
97 if (revs->commit_format == CMIT_FMT_ONELINE)
d87449c5
JH
98 putchar(' ');
99 else
100 putchar('\n');
101
11c211fa 102 if (revs->verbose_header && commit->buffer) {
f285a2d7 103 struct strbuf buf = STRBUF_INIT;
dd2e794a
TR
104 struct pretty_print_context ctx = {0};
105 ctx.abbrev = revs->abbrev;
106 ctx.date_mode = revs->date_mode;
6bf13944
JK
107 ctx.fmt = revs->commit_format;
108 pretty_print_commit(&ctx, commit, &buf);
11c211fa 109 if (revs->graph) {
7fefda5c 110 if (buf.len) {
11c211fa
CC
111 if (revs->commit_format != CMIT_FMT_ONELINE)
112 graph_show_oneline(revs->graph);
7fefda5c 113
11c211fa 114 graph_show_commit_msg(revs->graph, &buf);
7fefda5c
AS
115
116 /*
117 * Add a newline after the commit message.
118 *
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.
122 *
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.)
130 */
131 if (buf.len && buf.buf[buf.len - 1] == '\n')
11c211fa 132 graph_show_padding(revs->graph);
7fefda5c
AS
133 putchar('\n');
134 } else {
135 /*
136 * If the message buffer is empty, just show
137 * the rest of the graph output for this
138 * commit.
139 */
11c211fa 140 if (graph_show_remainder(revs->graph))
7fefda5c 141 putchar('\n');
1fb5fdd2
EFL
142 if (revs->commit_format == CMIT_FMT_ONELINE)
143 putchar('\n');
7fefda5c
AS
144 }
145 } else {
1fb5fdd2 146 if (revs->commit_format != CMIT_FMT_USERFORMAT ||
9130ac9f
JK
147 buf.len) {
148 fwrite(buf.buf, 1, buf.len, stdout);
149 putchar(info->hdr_termination);
150 }
7fefda5c 151 }
674d1727 152 strbuf_release(&buf);
7fefda5c 153 } else {
11c211fa 154 if (graph_show_remainder(revs->graph))
7fefda5c 155 putchar('\n');
7620d39f 156 }
06f59e9f 157 maybe_flush_or_die(stdout, "stdout");
11c211fa 158 finish_commit(commit, data);
27350891
SP
159}
160
11c211fa 161static void finish_commit(struct commit *commit, void *data)
27350891 162{
cb115748
LT
163 if (commit->parents) {
164 free_commit_list(commit->parents);
165 commit->parents = NULL;
166 }
4cac42b1
JH
167 free(commit->buffer);
168 commit->buffer = NULL;
a3437b8c
JS
169}
170
cf2ab916 171static void finish_object(struct object *obj, const struct name_path *path, const char *name)
27350891 172{
8d2dfc49
LT
173 if (obj->type == OBJ_BLOB && !has_sha1_file(obj->sha1))
174 die("missing blob object '%s'", sha1_to_hex(obj->sha1));
27350891
SP
175}
176
cf2ab916 177static void show_object(struct object *obj, const struct name_path *path, const char *component)
9de48752 178{
5f25b629 179 finish_object(obj, path, component);
91f17516 180 show_object_with_name(stdout, obj, path, component);
9de48752
LT
181}
182
8d1d8f83
JH
183static void show_edge(struct commit *commit)
184{
185 printf("-%s\n", sha1_to_hex(commit->object.sha1));
186}
187
9f199b15
CC
188static inline int log2i(int n)
189{
190 int log2 = 0;
191
192 for (; n > 1; n >>= 1)
193 log2++;
194
195 return log2;
196}
197
198static inline int exp2i(int n)
199{
200 return 1 << n;
201}
202
203/*
204 * Estimate the number of bisect steps left (after the current step)
205 *
206 * For any x between 0 included and 2^n excluded, the probability for
207 * n - 1 steps left looks like:
208 *
209 * P(2^n + x) == (2^n - x) / (2^n + x)
210 *
211 * and P(2^n + x) < 0.5 means 2^n < 3x
212 */
1c876546 213int estimate_bisect_steps(int all)
9f199b15
CC
214{
215 int n, x, e;
216
217 if (all < 3)
218 return 0;
219
220 n = log2i(all);
221 e = exp2i(n);
222 x = all - e;
223
224 return (e < 3 * x) ? n : n - 1;
225}
226
280e65cb
CC
227void print_commit_list(struct commit_list *list,
228 const char *format_cur,
229 const char *format_last)
230{
231 for ( ; list; list = list->next) {
232 const char *format = list->next ? format_cur : format_last;
233 printf(format, sha1_to_hex(list->item->object.sha1));
234 }
235}
236
38ef7507 237static void show_tried_revs(struct commit_list *tried)
95188648
CC
238{
239 printf("bisect_tried='");
280e65cb 240 print_commit_list(tried, "%s|", "%s");
38ef7507 241 printf("'\n");
95188648
CC
242}
243
38ef7507 244static void print_var_str(const char *var, const char *val)
280e65cb 245{
38ef7507 246 printf("%s='%s'\n", var, val);
280e65cb
CC
247}
248
38ef7507 249static void print_var_int(const char *var, int val)
280e65cb 250{
38ef7507 251 printf("%s=%d\n", var, val);
280e65cb
CC
252}
253
f1c92c63 254static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
9996983c 255{
38ef7507 256 int cnt, flags = info->bisect_show_flags;
280e65cb 257 char hex[41] = "";
95188648 258 struct commit_list *tried;
d797257e 259 struct rev_info *revs = info->revs;
9996983c 260
37c4c38d 261 if (!revs->commits && !(flags & BISECT_SHOW_TRIED))
9996983c
CC
262 return 1;
263
9af3589e
CC
264 revs->commits = filter_skipped(revs->commits, &tried,
265 flags & BISECT_SHOW_ALL,
266 NULL, NULL);
95188648 267
9996983c 268 /*
7428d754 269 * revs->commits can reach "reaches" commits among
9996983c
CC
270 * "all" commits. If it is good, then there are
271 * (all-reaches) commits left to be bisected.
272 * On the other hand, if it is bad, then the set
273 * to bisect is "reaches".
274 * A bisect set of size N has (N-1) commits further
275 * to test, as we already know one bad one.
276 */
277 cnt = all - reaches;
278 if (cnt < reaches)
279 cnt = reaches;
6a17fad7 280
95188648
CC
281 if (revs->commits)
282 strcpy(hex, sha1_to_hex(revs->commits->item->object.sha1));
9996983c 283
37c4c38d 284 if (flags & BISECT_SHOW_ALL) {
d797257e 285 traverse_commit_list(revs, show_commit, show_object, info);
9996983c
CC
286 printf("------\n");
287 }
288
37c4c38d 289 if (flags & BISECT_SHOW_TRIED)
38ef7507
CC
290 show_tried_revs(tried);
291
292 print_var_str("bisect_rev", hex);
293 print_var_int("bisect_nr", cnt - 1);
294 print_var_int("bisect_good", all - reaches - 1);
295 print_var_int("bisect_bad", reaches - 1);
296 print_var_int("bisect_all", all);
297 print_var_int("bisect_steps", estimate_bisect_steps(all));
9996983c
CC
298
299 return 0;
300}
301
a633fca0 302int cmd_rev_list(int argc, const char **argv, const char *prefix)
64745109 303{
11c211fa 304 struct rev_info revs;
d797257e 305 struct rev_list_info info;
d9a83684 306 int i;
ff62d732 307 int bisect_list = 0;
457f08a0 308 int bisect_show_vars = 0;
50e62a8e 309 int bisect_find_all = 0;
27350891 310 int quiet = 0;
64745109 311
ef90d6d4 312 git_config(git_default_config, NULL);
a633fca0 313 init_revisions(&revs, prefix);
7337b138 314 revs.abbrev = DEFAULT_ABBREV;
7594c4b2 315 revs.commit_format = CMIT_FMT_UNSPECIFIED;
a4a88b2b 316 argc = setup_revisions(argc, argv, &revs, NULL);
ae563542 317
d797257e
CC
318 memset(&info, 0, sizeof(info));
319 info.revs = &revs;
ad3f9a71
LT
320 if (revs.bisect)
321 bisect_list = 1;
d797257e 322
90b19941 323 quiet = DIFF_OPT_TST(&revs.diffopt, QUICK);
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 }
ae563542 351 usage(rev_list_usage);
a6f68d47 352
fcfda02b 353 }
7594c4b2
JH
354 if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
355 /* The command line has a --pretty */
d797257e 356 info.hdr_termination = '\n';
7594c4b2 357 if (revs.commit_format == CMIT_FMT_ONELINE)
d797257e 358 info.header_prefix = "";
7594c4b2 359 else
d797257e 360 info.header_prefix = "commit ";
7594c4b2 361 }
db89665f
JH
362 else if (revs.verbose_header)
363 /* Only --header was specified */
364 revs.commit_format = CMIT_FMT_RAW;
fcfda02b 365
d797257e 366 if ((!revs.commits &&
8c1f0b44 367 (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
1f1e895f 368 !revs.pending.nr)) ||
8c1f0b44 369 revs.diff)
7b34c2fa
LT
370 usage(rev_list_usage);
371
80235ba7
JH
372 save_commit_buffer = (revs.verbose_header ||
373 revs.grep_filter.pattern_list ||
374 revs.grep_filter.header_list);
4e1dc640
JH
375 if (bisect_list)
376 revs.limited = 1;
9181ca2c 377
3d51e1b5
MK
378 if (prepare_revision_walk(&revs))
379 die("revision walk setup failed");
a4a88b2b 380 if (revs.tree_objects)
8d1d8f83 381 mark_edges_uninteresting(revs.commits, &revs, show_edge);
a4a88b2b 382
457f08a0
JH
383 if (bisect_list) {
384 int reaches = reaches, all = all;
385
50e62a8e
CC
386 revs.commits = find_bisection(revs.commits, &reaches, &all,
387 bisect_find_all);
95188648 388
9996983c 389 if (bisect_show_vars)
13858e57 390 return show_bisect_vars(&info, reaches, all);
457f08a0 391 }
7b34c2fa 392
27350891 393 traverse_commit_list(&revs,
11c211fa
CC
394 quiet ? finish_commit : show_commit,
395 quiet ? finish_object : show_object,
d797257e 396 &info);
8906300f 397
f69c5018 398 if (revs.count) {
b388e14b
MG
399 if (revs.left_right && revs.cherry_mark)
400 printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
401 else if (revs.left_right)
f69c5018 402 printf("%d\t%d\n", revs.count_left, revs.count_right);
b388e14b
MG
403 else if (revs.cherry_mark)
404 printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
f69c5018
TR
405 else
406 printf("%d\n", revs.count_left + revs.count_right);
407 }
408
64745109
LT
409 return 0;
410}