1#include "cache.h"
2#include "diff.h"
3#include "commit.h"
4#include "tag.h"
5#include "graph.h"
6#include "log-tree.h"
7#include "reflog-walk.h"
8#include "refs.h"
9struct decoration name_decoration = { "object names" };
11static void add_name_decoration(const char *prefix, const char *name, struct object *obj)
13{
14 int plen = strlen(prefix);
15 int nlen = strlen(name);
16 struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + plen + nlen);
17 memcpy(res->name, prefix, plen);
18 memcpy(res->name + plen, name, nlen + 1);
19 res->next = add_decoration(&name_decoration, obj, res);
20}
21static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
23{
24 struct object *obj = parse_object(sha1);
25 if (!obj)
26 return 0;
27 add_name_decoration("", refname, obj);
28 while (obj->type == OBJ_TAG) {
29 obj = ((struct tag *)obj)->tagged;
30 if (!obj)
31 break;
32 add_name_decoration("tag: ", refname, obj);
33 }
34 return 0;
35}
36void load_ref_decorations(void)
38{
39 static int loaded;
40 if (!loaded) {
41 loaded = 1;
42 for_each_ref(add_ref_decoration, NULL);
43 }
44}
45static void show_parents(struct commit *commit, int abbrev)
47{
48 struct commit_list *p;
49 for (p = commit->parents; p ; p = p->next) {
50 struct commit *parent = p->item;
51 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
52 }
53}
54void show_decorations(struct rev_info *opt, struct commit *commit)
56{
57 const char *prefix;
58 struct name_decoration *decoration;
59 if (opt->show_source && commit->util)
61 printf("\t%s", (char *) commit->util);
62 if (!opt->show_decorations)
63 return;
64 decoration = lookup_decoration(&name_decoration, &commit->object);
65 if (!decoration)
66 return;
67 prefix = " (";
68 while (decoration) {
69 printf("%s%s", prefix, decoration->name);
70 prefix = ", ";
71 decoration = decoration->next;
72 }
73 putchar(')');
74}
75/*
77 * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
78 * Signed-off-by: and Acked-by: lines.
79 */
80static int detect_any_signoff(char *letter, int size)
81{
82 char ch, *cp;
83 int seen_colon = 0;
84 int seen_at = 0;
85 int seen_name = 0;
86 int seen_head = 0;
87 cp = letter + size;
89 while (letter <= --cp && (ch = *cp) == '\n')
90 continue;
91 while (letter <= cp) {
93 ch = *cp--;
94 if (ch == '\n')
95 break;
96 if (!seen_at) {
98 if (ch == '@')
99 seen_at = 1;
100 continue;
101 }
102 if (!seen_colon) {
103 if (ch == '@')
104 return 0;
105 else if (ch == ':')
106 seen_colon = 1;
107 else
108 seen_name = 1;
109 continue;
110 }
111 if (('A' <= ch && ch <= 'Z') ||
112 ('a' <= ch && ch <= 'z') ||
113 ch == '-') {
114 seen_head = 1;
115 continue;
116 }
117 /* no empty last line doesn't match */
118 return 0;
119 }
120 return seen_head && seen_name;
121}
122static void append_signoff(struct strbuf *sb, const char *signoff)
124{
125 static const char signed_off_by[] = "Signed-off-by: ";
126 size_t signoff_len = strlen(signoff);
127 int has_signoff = 0;
128 char *cp;
129 cp = sb->buf;
131 /* First see if we already have the sign-off by the signer */
133 while ((cp = strstr(cp, signed_off_by))) {
134 has_signoff = 1;
136 cp += strlen(signed_off_by);
138 if (cp + signoff_len >= sb->buf + sb->len)
139 break;
140 if (strncmp(cp, signoff, signoff_len))
141 continue;
142 if (!isspace(cp[signoff_len]))
143 continue;
144 /* we already have him */
145 return;
146 }
147 if (!has_signoff)
149 has_signoff = detect_any_signoff(sb->buf, sb->len);
150 if (!has_signoff)
152 strbuf_addch(sb, '\n');
153 strbuf_addstr(sb, signed_off_by);
155 strbuf_add(sb, signoff, signoff_len);
156 strbuf_addch(sb, '\n');
157}
158static unsigned int digits_in_number(unsigned int number)
160{
161 unsigned int i = 10, result = 1;
162 while (i <= number) {
163 i *= 10;
164 result++;
165 }
166 return result;
167}
168static int has_non_ascii(const char *s)
170{
171 int ch;
172 if (!s)
173 return 0;
174 while ((ch = *s++) != '\0') {
175 if (non_ascii(ch))
176 return 1;
177 }
178 return 0;
179}
180void log_write_email_headers(struct rev_info *opt, const char *name,
182 const char **subject_p,
183 const char **extra_headers_p,
184 int *need_8bit_cte_p)
185{
186 const char *subject = NULL;
187 const char *extra_headers = opt->extra_headers;
188 *need_8bit_cte_p = 0; /* unknown */
190 if (opt->total > 0) {
191 static char buffer[64];
192 snprintf(buffer, sizeof(buffer),
193 "Subject: [%s %0*d/%d] ",
194 opt->subject_prefix,
195 digits_in_number(opt->total),
196 opt->nr, opt->total);
197 subject = buffer;
198 } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
199 static char buffer[256];
200 snprintf(buffer, sizeof(buffer),
201 "Subject: [%s] ",
202 opt->subject_prefix);
203 subject = buffer;
204 } else {
205 subject = "Subject: ";
206 }
207 printf("From %s Mon Sep 17 00:00:00 2001\n", name);
209 graph_show_oneline(opt->graph);
210 if (opt->message_id) {
211 printf("Message-Id: <%s>\n", opt->message_id);
212 graph_show_oneline(opt->graph);
213 }
214 if (opt->ref_message_id) {
215 printf("In-Reply-To: <%s>\nReferences: <%s>\n",
216 opt->ref_message_id, opt->ref_message_id);
217 graph_show_oneline(opt->graph);
218 }
219 if (opt->mime_boundary) {
220 static char subject_buffer[1024];
221 static char buffer[1024];
222 *need_8bit_cte_p = -1; /* NEVER */
223 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
224 "%s"
225 "MIME-Version: 1.0\n"
226 "Content-Type: multipart/mixed;"
227 " boundary=\"%s%s\"\n"
228 "\n"
229 "This is a multi-part message in MIME "
230 "format.\n"
231 "--%s%s\n"
232 "Content-Type: text/plain; "
233 "charset=UTF-8; format=fixed\n"
234 "Content-Transfer-Encoding: 8bit\n\n",
235 extra_headers ? extra_headers : "",
236 mime_boundary_leader, opt->mime_boundary,
237 mime_boundary_leader, opt->mime_boundary);
238 extra_headers = subject_buffer;
239 snprintf(buffer, sizeof(buffer) - 1,
241 "\n--%s%s\n"
242 "Content-Type: text/x-patch;"
243 " name=\"%s.diff\"\n"
244 "Content-Transfer-Encoding: 8bit\n"
245 "Content-Disposition: %s;"
246 " filename=\"%s.diff\"\n\n",
247 mime_boundary_leader, opt->mime_boundary,
248 name,
249 opt->no_inline ? "attachment" : "inline",
250 name);
251 opt->diffopt.stat_sep = buffer;
252 }
253 *subject_p = subject;
254 *extra_headers_p = extra_headers;
255}
256void show_log(struct rev_info *opt)
258{
259 struct strbuf msgbuf = STRBUF_INIT;
260 struct log_info *log = opt->loginfo;
261 struct commit *commit = log->commit, *parent = log->parent;
262 int abbrev = opt->diffopt.abbrev;
263 int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
264 const char *subject = NULL, *extra_headers = opt->extra_headers;
265 int need_8bit_cte = 0;
266 opt->loginfo = NULL;
268 if (!opt->verbose_header) {
269 graph_show_commit(opt->graph);
270 if (!opt->graph) {
272 if (commit->object.flags & BOUNDARY)
273 putchar('-');
274 else if (commit->object.flags & UNINTERESTING)
275 putchar('^');
276 else if (opt->left_right) {
277 if (commit->object.flags & SYMMETRIC_LEFT)
278 putchar('<');
279 else
280 putchar('>');
281 }
282 }
283 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
284 if (opt->print_parents)
285 show_parents(commit, abbrev_commit);
286 show_decorations(opt, commit);
287 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
288 putchar('\n');
289 graph_show_remainder(opt->graph);
290 }
291 putchar(opt->diffopt.line_termination);
292 return;
293 }
294 /*
296 * If use_terminator is set, add a newline at the end of the entry.
297 * Otherwise, add a diffopt.line_termination character before all
298 * entries but the first. (IOW, as a separator between entries)
299 */
300 if (opt->shown_one && !opt->use_terminator) {
301 /*
302 * If entries are separated by a newline, the output
303 * should look human-readable. If the last entry ended
304 * with a newline, print the graph output before this
305 * newline. Otherwise it will end up as a completely blank
306 * line and will look like a gap in the graph.
307 *
308 * If the entry separator is not a newline, the output is
309 * primarily intended for programmatic consumption, and we
310 * never want the extra graph output before the entry
311 * separator.
312 */
313 if (opt->diffopt.line_termination == '\n' &&
314 !opt->missing_newline)
315 graph_show_padding(opt->graph);
316 putchar(opt->diffopt.line_termination);
317 }
318 opt->shown_one = 1;
319 /*
321 * If the history graph was requested,
322 * print the graph, up to this commit's line
323 */
324 graph_show_commit(opt->graph);
325 /*
327 * Print header line of header..
328 */
329 if (opt->commit_format == CMIT_FMT_EMAIL) {
331 log_write_email_headers(opt, sha1_to_hex(commit->object.sha1),
332 &subject, &extra_headers,
333 &need_8bit_cte);
334 } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
335 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
336 if (opt->commit_format != CMIT_FMT_ONELINE)
337 fputs("commit ", stdout);
338 if (!opt->graph) {
340 if (commit->object.flags & BOUNDARY)
341 putchar('-');
342 else if (commit->object.flags & UNINTERESTING)
343 putchar('^');
344 else if (opt->left_right) {
345 if (commit->object.flags & SYMMETRIC_LEFT)
346 putchar('<');
347 else
348 putchar('>');
349 }
350 }
351 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
352 stdout);
353 if (opt->print_parents)
354 show_parents(commit, abbrev_commit);
355 if (parent)
356 printf(" (from %s)",
357 find_unique_abbrev(parent->object.sha1,
358 abbrev_commit));
359 show_decorations(opt, commit);
360 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
361 if (opt->commit_format == CMIT_FMT_ONELINE) {
362 putchar(' ');
363 } else {
364 putchar('\n');
365 graph_show_oneline(opt->graph);
366 }
367 if (opt->reflog_info) {
368 /*
369 * setup_revisions() ensures that opt->reflog_info
370 * and opt->graph cannot both be set,
371 * so we don't need to worry about printing the
372 * graph info here.
373 */
374 show_reflog_message(opt->reflog_info,
375 opt->commit_format == CMIT_FMT_ONELINE,
376 opt->date_mode);
377 if (opt->commit_format == CMIT_FMT_ONELINE)
378 return;
379 }
380 }
381 if (!commit->buffer)
383 return;
384 /*
386 * And then the pretty-printed message itself
387 */
388 if (need_8bit_cte >= 0)
389 need_8bit_cte = has_non_ascii(opt->add_signoff);
390 pretty_print_commit(opt->commit_format, commit, &msgbuf,
391 abbrev, subject, extra_headers, opt->date_mode,
392 need_8bit_cte);
393 if (opt->add_signoff)
395 append_signoff(&msgbuf, opt->add_signoff);
396 if (opt->show_log_size) {
397 printf("log size %i\n", (int)msgbuf.len);
398 graph_show_oneline(opt->graph);
399 }
400 /*
402 * Set opt->missing_newline if msgbuf doesn't
403 * end in a newline (including if it is empty)
404 */
405 if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
406 opt->missing_newline = 1;
407 else
408 opt->missing_newline = 0;
409 if (opt->graph)
411 graph_show_commit_msg(opt->graph, &msgbuf);
412 else
413 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
414 if (opt->use_terminator) {
415 if (!opt->missing_newline)
416 graph_show_padding(opt->graph);
417 putchar('\n');
418 }
419 strbuf_release(&msgbuf);
421}
422int log_tree_diff_flush(struct rev_info *opt)
424{
425 diffcore_std(&opt->diffopt);
426 if (diff_queue_is_empty()) {
428 int saved_fmt = opt->diffopt.output_format;
429 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
430 diff_flush(&opt->diffopt);
431 opt->diffopt.output_format = saved_fmt;
432 return 0;
433 }
434 if (opt->loginfo && !opt->no_commit_id) {
436 /* When showing a verbose header (i.e. log message),
437 * and not in --pretty=oneline format, we would want
438 * an extra newline between the end of log and the
439 * output for readability.
440 */
441 show_log(opt);
442 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
443 opt->verbose_header &&
444 opt->commit_format != CMIT_FMT_ONELINE) {
445 int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
446 if ((pch & opt->diffopt.output_format) == pch)
447 printf("---");
448 putchar('\n');
449 }
450 }
451 diff_flush(&opt->diffopt);
452 return 1;
453}
454static int do_diff_combined(struct rev_info *opt, struct commit *commit)
456{
457 unsigned const char *sha1 = commit->object.sha1;
458 diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
460 return !opt->loginfo;
461}
462/*
464 * Show the diff of a commit.
465 *
466 * Return true if we printed any log info messages
467 */
468static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
469{
470 int showed_log;
471 struct commit_list *parents;
472 unsigned const char *sha1 = commit->object.sha1;
473 if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
475 return 0;
476 /* Root commit? */
478 parents = commit->parents;
479 if (!parents) {
480 if (opt->show_root_diff) {
481 diff_root_tree_sha1(sha1, "", &opt->diffopt);
482 log_tree_diff_flush(opt);
483 }
484 return !opt->loginfo;
485 }
486 /* More than one parent? */
488 if (parents && parents->next) {
489 if (opt->ignore_merges)
490 return 0;
491 else if (opt->combine_merges)
492 return do_diff_combined(opt, commit);
493 /* If we show individual diffs, show the parent info */
495 log->parent = parents->item;
496 }
497 showed_log = 0;
499 for (;;) {
500 struct commit *parent = parents->item;
501 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
503 log_tree_diff_flush(opt);
504 showed_log |= !opt->loginfo;
506 /* Set up the log info for the next parent, if any.. */
508 parents = parents->next;
509 if (!parents)
510 break;
511 log->parent = parents->item;
512 opt->loginfo = log;
513 }
514 return showed_log;
515}
516int log_tree_commit(struct rev_info *opt, struct commit *commit)
518{
519 struct log_info log;
520 int shown;
521 log.commit = commit;
523 log.parent = NULL;
524 opt->loginfo = &log;
525 shown = log_tree_diff(opt, commit, &log);
527 if (!shown && opt->loginfo && opt->always_show_header) {
528 log.parent = NULL;
529 show_log(opt);
530 shown = 1;
531 }
532 opt->loginfo = NULL;
533 maybe_flush_or_die(stdout, "stdout");
534 return shown;
535}