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"
9#include "string-list.h"
10struct decoration name_decoration = { "object names" };
12static void add_name_decoration(const char *prefix, const char *name, struct object *obj)
14{
15 int plen = strlen(prefix);
16 int nlen = strlen(name);
17 struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + plen + nlen);
18 memcpy(res->name, prefix, plen);
19 memcpy(res->name + plen, name, nlen + 1);
20 res->next = add_decoration(&name_decoration, obj, res);
21}
22static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
24{
25 struct object *obj = parse_object(sha1);
26 if (!obj)
27 return 0;
28 if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
29 refname = prettify_refname(refname);
30 add_name_decoration("", refname, obj);
31 while (obj->type == OBJ_TAG) {
32 obj = ((struct tag *)obj)->tagged;
33 if (!obj)
34 break;
35 add_name_decoration("tag: ", refname, obj);
36 }
37 return 0;
38}
39void load_ref_decorations(int flags)
41{
42 static int loaded;
43 if (!loaded) {
44 loaded = 1;
45 for_each_ref(add_ref_decoration, &flags);
46 head_ref(add_ref_decoration, &flags);
47 }
48}
49static void show_parents(struct commit *commit, int abbrev)
51{
52 struct commit_list *p;
53 for (p = commit->parents; p ; p = p->next) {
54 struct commit *parent = p->item;
55 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
56 }
57}
58void show_decorations(struct rev_info *opt, struct commit *commit)
60{
61 const char *prefix;
62 struct name_decoration *decoration;
63 if (opt->show_source && commit->util)
65 printf("\t%s", (char *) commit->util);
66 if (!opt->show_decorations)
67 return;
68 decoration = lookup_decoration(&name_decoration, &commit->object);
69 if (!decoration)
70 return;
71 prefix = " (";
72 while (decoration) {
73 printf("%s%s", prefix, decoration->name);
74 prefix = ", ";
75 decoration = decoration->next;
76 }
77 putchar(')');
78}
79/*
81 * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
82 * Signed-off-by: and Acked-by: lines.
83 */
84static int detect_any_signoff(char *letter, int size)
85{
86 char *cp;
87 int seen_colon = 0;
88 int seen_at = 0;
89 int seen_name = 0;
90 int seen_head = 0;
91 cp = letter + size;
93 while (letter <= --cp && *cp == '\n')
94 continue;
95 while (letter <= cp) {
97 char ch = *cp--;
98 if (ch == '\n')
99 break;
100 if (!seen_at) {
102 if (ch == '@')
103 seen_at = 1;
104 continue;
105 }
106 if (!seen_colon) {
107 if (ch == '@')
108 return 0;
109 else if (ch == ':')
110 seen_colon = 1;
111 else
112 seen_name = 1;
113 continue;
114 }
115 if (('A' <= ch && ch <= 'Z') ||
116 ('a' <= ch && ch <= 'z') ||
117 ch == '-') {
118 seen_head = 1;
119 continue;
120 }
121 /* no empty last line doesn't match */
122 return 0;
123 }
124 return seen_head && seen_name;
125}
126static void append_signoff(struct strbuf *sb, const char *signoff)
128{
129 static const char signed_off_by[] = "Signed-off-by: ";
130 size_t signoff_len = strlen(signoff);
131 int has_signoff = 0;
132 char *cp;
133 cp = sb->buf;
135 /* First see if we already have the sign-off by the signer */
137 while ((cp = strstr(cp, signed_off_by))) {
138 has_signoff = 1;
140 cp += strlen(signed_off_by);
142 if (cp + signoff_len >= sb->buf + sb->len)
143 break;
144 if (strncmp(cp, signoff, signoff_len))
145 continue;
146 if (!isspace(cp[signoff_len]))
147 continue;
148 /* we already have him */
149 return;
150 }
151 if (!has_signoff)
153 has_signoff = detect_any_signoff(sb->buf, sb->len);
154 if (!has_signoff)
156 strbuf_addch(sb, '\n');
157 strbuf_addstr(sb, signed_off_by);
159 strbuf_add(sb, signoff, signoff_len);
160 strbuf_addch(sb, '\n');
161}
162static unsigned int digits_in_number(unsigned int number)
164{
165 unsigned int i = 10, result = 1;
166 while (i <= number) {
167 i *= 10;
168 result++;
169 }
170 return result;
171}
172void get_patch_filename(struct commit *commit, int nr, const char *suffix,
174 struct strbuf *buf)
175{
176 int suffix_len = strlen(suffix) + 1;
177 int start_len = buf->len;
178 strbuf_addf(buf, commit ? "%04d-" : "%d", nr);
180 if (commit) {
181 int max_len = start_len + FORMAT_PATCH_NAME_MAX - suffix_len;
182 format_commit_message(commit, "%f", buf, DATE_NORMAL);
184 if (max_len < buf->len)
185 strbuf_setlen(buf, max_len);
186 strbuf_addstr(buf, suffix);
187 }
188}
189void log_write_email_headers(struct rev_info *opt, struct commit *commit,
191 const char **subject_p,
192 const char **extra_headers_p,
193 int *need_8bit_cte_p)
194{
195 const char *subject = NULL;
196 const char *extra_headers = opt->extra_headers;
197 const char *name = sha1_to_hex(commit->object.sha1);
198 *need_8bit_cte_p = 0; /* unknown */
200 if (opt->total > 0) {
201 static char buffer[64];
202 snprintf(buffer, sizeof(buffer),
203 "Subject: [%s %0*d/%d] ",
204 opt->subject_prefix,
205 digits_in_number(opt->total),
206 opt->nr, opt->total);
207 subject = buffer;
208 } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
209 static char buffer[256];
210 snprintf(buffer, sizeof(buffer),
211 "Subject: [%s] ",
212 opt->subject_prefix);
213 subject = buffer;
214 } else {
215 subject = "Subject: ";
216 }
217 printf("From %s Mon Sep 17 00:00:00 2001\n", name);
219 graph_show_oneline(opt->graph);
220 if (opt->message_id) {
221 printf("Message-Id: <%s>\n", opt->message_id);
222 graph_show_oneline(opt->graph);
223 }
224 if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
225 int i, n;
226 n = opt->ref_message_ids->nr;
227 printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
228 for (i = 0; i < n; i++)
229 printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
230 opt->ref_message_ids->items[i].string);
231 graph_show_oneline(opt->graph);
232 }
233 if (opt->mime_boundary) {
234 static char subject_buffer[1024];
235 static char buffer[1024];
236 struct strbuf filename = STRBUF_INIT;
237 *need_8bit_cte_p = -1; /* NEVER */
238 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
239 "%s"
240 "MIME-Version: 1.0\n"
241 "Content-Type: multipart/mixed;"
242 " boundary=\"%s%s\"\n"
243 "\n"
244 "This is a multi-part message in MIME "
245 "format.\n"
246 "--%s%s\n"
247 "Content-Type: text/plain; "
248 "charset=UTF-8; format=fixed\n"
249 "Content-Transfer-Encoding: 8bit\n\n",
250 extra_headers ? extra_headers : "",
251 mime_boundary_leader, opt->mime_boundary,
252 mime_boundary_leader, opt->mime_boundary);
253 extra_headers = subject_buffer;
254 get_patch_filename(opt->numbered_files ? NULL : commit, opt->nr,
256 opt->patch_suffix, &filename);
257 snprintf(buffer, sizeof(buffer) - 1,
258 "\n--%s%s\n"
259 "Content-Type: text/x-patch;"
260 " name=\"%s\"\n"
261 "Content-Transfer-Encoding: 8bit\n"
262 "Content-Disposition: %s;"
263 " filename=\"%s\"\n\n",
264 mime_boundary_leader, opt->mime_boundary,
265 filename.buf,
266 opt->no_inline ? "attachment" : "inline",
267 filename.buf);
268 opt->diffopt.stat_sep = buffer;
269 strbuf_release(&filename);
270 }
271 *subject_p = subject;
272 *extra_headers_p = extra_headers;
273}
274void show_log(struct rev_info *opt)
276{
277 struct strbuf msgbuf = STRBUF_INIT;
278 struct log_info *log = opt->loginfo;
279 struct commit *commit = log->commit, *parent = log->parent;
280 int abbrev = opt->diffopt.abbrev;
281 int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
282 const char *subject = NULL, *extra_headers = opt->extra_headers;
283 int need_8bit_cte = 0;
284 opt->loginfo = NULL;
286 if (!opt->verbose_header) {
287 graph_show_commit(opt->graph);
288 if (!opt->graph) {
290 if (commit->object.flags & BOUNDARY)
291 putchar('-');
292 else if (commit->object.flags & UNINTERESTING)
293 putchar('^');
294 else if (opt->left_right) {
295 if (commit->object.flags & SYMMETRIC_LEFT)
296 putchar('<');
297 else
298 putchar('>');
299 }
300 }
301 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
302 if (opt->print_parents)
303 show_parents(commit, abbrev_commit);
304 show_decorations(opt, commit);
305 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
306 putchar('\n');
307 graph_show_remainder(opt->graph);
308 }
309 putchar(opt->diffopt.line_termination);
310 return;
311 }
312 /*
314 * If use_terminator is set, we already handled any record termination
315 * at the end of the last record.
316 * Otherwise, add a diffopt.line_termination character before all
317 * entries but the first. (IOW, as a separator between entries)
318 */
319 if (opt->shown_one && !opt->use_terminator) {
320 /*
321 * If entries are separated by a newline, the output
322 * should look human-readable. If the last entry ended
323 * with a newline, print the graph output before this
324 * newline. Otherwise it will end up as a completely blank
325 * line and will look like a gap in the graph.
326 *
327 * If the entry separator is not a newline, the output is
328 * primarily intended for programmatic consumption, and we
329 * never want the extra graph output before the entry
330 * separator.
331 */
332 if (opt->diffopt.line_termination == '\n' &&
333 !opt->missing_newline)
334 graph_show_padding(opt->graph);
335 putchar(opt->diffopt.line_termination);
336 }
337 opt->shown_one = 1;
338 /*
340 * If the history graph was requested,
341 * print the graph, up to this commit's line
342 */
343 graph_show_commit(opt->graph);
344 /*
346 * Print header line of header..
347 */
348 if (opt->commit_format == CMIT_FMT_EMAIL) {
350 log_write_email_headers(opt, commit, &subject, &extra_headers,
351 &need_8bit_cte);
352 } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
353 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
354 if (opt->commit_format != CMIT_FMT_ONELINE)
355 fputs("commit ", stdout);
356 if (!opt->graph) {
358 if (commit->object.flags & BOUNDARY)
359 putchar('-');
360 else if (commit->object.flags & UNINTERESTING)
361 putchar('^');
362 else if (opt->left_right) {
363 if (commit->object.flags & SYMMETRIC_LEFT)
364 putchar('<');
365 else
366 putchar('>');
367 }
368 }
369 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
370 stdout);
371 if (opt->print_parents)
372 show_parents(commit, abbrev_commit);
373 if (parent)
374 printf(" (from %s)",
375 find_unique_abbrev(parent->object.sha1,
376 abbrev_commit));
377 show_decorations(opt, commit);
378 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
379 if (opt->commit_format == CMIT_FMT_ONELINE) {
380 putchar(' ');
381 } else {
382 putchar('\n');
383 graph_show_oneline(opt->graph);
384 }
385 if (opt->reflog_info) {
386 /*
387 * setup_revisions() ensures that opt->reflog_info
388 * and opt->graph cannot both be set,
389 * so we don't need to worry about printing the
390 * graph info here.
391 */
392 show_reflog_message(opt->reflog_info,
393 opt->commit_format == CMIT_FMT_ONELINE,
394 opt->date_mode_explicit ?
395 opt->date_mode :
396 DATE_NORMAL);
397 if (opt->commit_format == CMIT_FMT_ONELINE)
398 return;
399 }
400 }
401 if (!commit->buffer)
403 return;
404 /*
406 * And then the pretty-printed message itself
407 */
408 if (need_8bit_cte >= 0)
409 need_8bit_cte = has_non_ascii(opt->add_signoff);
410 pretty_print_commit(opt->commit_format, commit, &msgbuf,
411 abbrev, subject, extra_headers, opt->date_mode,
412 need_8bit_cte);
413 if (opt->add_signoff)
415 append_signoff(&msgbuf, opt->add_signoff);
416 if (opt->show_log_size) {
417 printf("log size %i\n", (int)msgbuf.len);
418 graph_show_oneline(opt->graph);
419 }
420 /*
422 * Set opt->missing_newline if msgbuf doesn't
423 * end in a newline (including if it is empty)
424 */
425 if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
426 opt->missing_newline = 1;
427 else
428 opt->missing_newline = 0;
429 if (opt->graph)
431 graph_show_commit_msg(opt->graph, &msgbuf);
432 else
433 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
434 if (opt->use_terminator) {
435 if (!opt->missing_newline)
436 graph_show_padding(opt->graph);
437 putchar('\n');
438 }
439 strbuf_release(&msgbuf);
441}
442int log_tree_diff_flush(struct rev_info *opt)
444{
445 diffcore_std(&opt->diffopt);
446 if (diff_queue_is_empty()) {
448 int saved_fmt = opt->diffopt.output_format;
449 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
450 diff_flush(&opt->diffopt);
451 opt->diffopt.output_format = saved_fmt;
452 return 0;
453 }
454 if (opt->loginfo && !opt->no_commit_id) {
456 /* When showing a verbose header (i.e. log message),
457 * and not in --pretty=oneline format, we would want
458 * an extra newline between the end of log and the
459 * output for readability.
460 */
461 show_log(opt);
462 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
463 opt->verbose_header &&
464 opt->commit_format != CMIT_FMT_ONELINE) {
465 int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
466 if ((pch & opt->diffopt.output_format) == pch)
467 printf("---");
468 putchar('\n');
469 }
470 }
471 diff_flush(&opt->diffopt);
472 return 1;
473}
474static int do_diff_combined(struct rev_info *opt, struct commit *commit)
476{
477 unsigned const char *sha1 = commit->object.sha1;
478 diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
480 return !opt->loginfo;
481}
482/*
484 * Show the diff of a commit.
485 *
486 * Return true if we printed any log info messages
487 */
488static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
489{
490 int showed_log;
491 struct commit_list *parents;
492 unsigned const char *sha1 = commit->object.sha1;
493 if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
495 return 0;
496 /* Root commit? */
498 parents = commit->parents;
499 if (!parents) {
500 if (opt->show_root_diff) {
501 diff_root_tree_sha1(sha1, "", &opt->diffopt);
502 log_tree_diff_flush(opt);
503 }
504 return !opt->loginfo;
505 }
506 /* More than one parent? */
508 if (parents && parents->next) {
509 if (opt->ignore_merges)
510 return 0;
511 else if (opt->combine_merges)
512 return do_diff_combined(opt, commit);
513 /* If we show individual diffs, show the parent info */
515 log->parent = parents->item;
516 }
517 showed_log = 0;
519 for (;;) {
520 struct commit *parent = parents->item;
521 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
523 log_tree_diff_flush(opt);
524 showed_log |= !opt->loginfo;
526 /* Set up the log info for the next parent, if any.. */
528 parents = parents->next;
529 if (!parents)
530 break;
531 log->parent = parents->item;
532 opt->loginfo = log;
533 }
534 return showed_log;
535}
536int log_tree_commit(struct rev_info *opt, struct commit *commit)
538{
539 struct log_info log;
540 int shown;
541 log.commit = commit;
543 log.parent = NULL;
544 opt->loginfo = &log;
545 shown = log_tree_diff(opt, commit, &log);
547 if (!shown && opt->loginfo && opt->always_show_header) {
548 log.parent = NULL;
549 show_log(opt);
550 shown = 1;
551 }
552 opt->loginfo = NULL;
553 maybe_flush_or_die(stdout, "stdout");
554 return shown;
555}