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 add_name_decoration("", refname, obj);
29 while (obj->type == OBJ_TAG) {
30 obj = ((struct tag *)obj)->tagged;
31 if (!obj)
32 break;
33 add_name_decoration("tag: ", refname, obj);
34 }
35 return 0;
36}
37void load_ref_decorations(void)
39{
40 static int loaded;
41 if (!loaded) {
42 loaded = 1;
43 for_each_ref(add_ref_decoration, NULL);
44 }
45}
46static void show_parents(struct commit *commit, int abbrev)
48{
49 struct commit_list *p;
50 for (p = commit->parents; p ; p = p->next) {
51 struct commit *parent = p->item;
52 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
53 }
54}
55void show_decorations(struct rev_info *opt, struct commit *commit)
57{
58 const char *prefix;
59 struct name_decoration *decoration;
60 if (opt->show_source && commit->util)
62 printf("\t%s", (char *) commit->util);
63 if (!opt->show_decorations)
64 return;
65 decoration = lookup_decoration(&name_decoration, &commit->object);
66 if (!decoration)
67 return;
68 prefix = " (";
69 while (decoration) {
70 printf("%s%s", prefix, decoration->name);
71 prefix = ", ";
72 decoration = decoration->next;
73 }
74 putchar(')');
75}
76/*
78 * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
79 * Signed-off-by: and Acked-by: lines.
80 */
81static int detect_any_signoff(char *letter, int size)
82{
83 char *cp;
84 int seen_colon = 0;
85 int seen_at = 0;
86 int seen_name = 0;
87 int seen_head = 0;
88 cp = letter + size;
90 while (letter <= --cp && *cp == '\n')
91 continue;
92 while (letter <= cp) {
94 char ch = *cp--;
95 if (ch == '\n')
96 break;
97 if (!seen_at) {
99 if (ch == '@')
100 seen_at = 1;
101 continue;
102 }
103 if (!seen_colon) {
104 if (ch == '@')
105 return 0;
106 else if (ch == ':')
107 seen_colon = 1;
108 else
109 seen_name = 1;
110 continue;
111 }
112 if (('A' <= ch && ch <= 'Z') ||
113 ('a' <= ch && ch <= 'z') ||
114 ch == '-') {
115 seen_head = 1;
116 continue;
117 }
118 /* no empty last line doesn't match */
119 return 0;
120 }
121 return seen_head && seen_name;
122}
123static void append_signoff(struct strbuf *sb, const char *signoff)
125{
126 static const char signed_off_by[] = "Signed-off-by: ";
127 size_t signoff_len = strlen(signoff);
128 int has_signoff = 0;
129 char *cp;
130 cp = sb->buf;
132 /* First see if we already have the sign-off by the signer */
134 while ((cp = strstr(cp, signed_off_by))) {
135 has_signoff = 1;
137 cp += strlen(signed_off_by);
139 if (cp + signoff_len >= sb->buf + sb->len)
140 break;
141 if (strncmp(cp, signoff, signoff_len))
142 continue;
143 if (!isspace(cp[signoff_len]))
144 continue;
145 /* we already have him */
146 return;
147 }
148 if (!has_signoff)
150 has_signoff = detect_any_signoff(sb->buf, sb->len);
151 if (!has_signoff)
153 strbuf_addch(sb, '\n');
154 strbuf_addstr(sb, signed_off_by);
156 strbuf_add(sb, signoff, signoff_len);
157 strbuf_addch(sb, '\n');
158}
159static unsigned int digits_in_number(unsigned int number)
161{
162 unsigned int i = 10, result = 1;
163 while (i <= number) {
164 i *= 10;
165 result++;
166 }
167 return result;
168}
169static int has_non_ascii(const char *s)
171{
172 int ch;
173 if (!s)
174 return 0;
175 while ((ch = *s++) != '\0') {
176 if (non_ascii(ch))
177 return 1;
178 }
179 return 0;
180}
181void get_patch_filename(struct commit *commit, int nr, const char *suffix,
183 struct strbuf *buf)
184{
185 int suffix_len = strlen(suffix) + 1;
186 int start_len = buf->len;
187 strbuf_addf(buf, commit ? "%04d-" : "%d", nr);
189 if (commit) {
190 int max_len = start_len + FORMAT_PATCH_NAME_MAX - suffix_len;
191 format_commit_message(commit, "%f", buf, DATE_NORMAL);
193 if (max_len < buf->len)
194 strbuf_setlen(buf, max_len);
195 strbuf_addstr(buf, suffix);
196 }
197}
198void log_write_email_headers(struct rev_info *opt, struct commit *commit,
200 const char **subject_p,
201 const char **extra_headers_p,
202 int *need_8bit_cte_p)
203{
204 const char *subject = NULL;
205 const char *extra_headers = opt->extra_headers;
206 const char *name = sha1_to_hex(commit->object.sha1);
207 *need_8bit_cte_p = 0; /* unknown */
209 if (opt->total > 0) {
210 static char buffer[64];
211 snprintf(buffer, sizeof(buffer),
212 "Subject: [%s %0*d/%d] ",
213 opt->subject_prefix,
214 digits_in_number(opt->total),
215 opt->nr, opt->total);
216 subject = buffer;
217 } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
218 static char buffer[256];
219 snprintf(buffer, sizeof(buffer),
220 "Subject: [%s] ",
221 opt->subject_prefix);
222 subject = buffer;
223 } else {
224 subject = "Subject: ";
225 }
226 printf("From %s Mon Sep 17 00:00:00 2001\n", name);
228 graph_show_oneline(opt->graph);
229 if (opt->message_id) {
230 printf("Message-Id: <%s>\n", opt->message_id);
231 graph_show_oneline(opt->graph);
232 }
233 if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
234 int i, n;
235 n = opt->ref_message_ids->nr;
236 printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
237 for (i = 0; i < n; i++)
238 printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
239 opt->ref_message_ids->items[i].string);
240 graph_show_oneline(opt->graph);
241 }
242 if (opt->mime_boundary) {
243 static char subject_buffer[1024];
244 static char buffer[1024];
245 struct strbuf filename = STRBUF_INIT;
246 *need_8bit_cte_p = -1; /* NEVER */
247 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
248 "%s"
249 "MIME-Version: 1.0\n"
250 "Content-Type: multipart/mixed;"
251 " boundary=\"%s%s\"\n"
252 "\n"
253 "This is a multi-part message in MIME "
254 "format.\n"
255 "--%s%s\n"
256 "Content-Type: text/plain; "
257 "charset=UTF-8; format=fixed\n"
258 "Content-Transfer-Encoding: 8bit\n\n",
259 extra_headers ? extra_headers : "",
260 mime_boundary_leader, opt->mime_boundary,
261 mime_boundary_leader, opt->mime_boundary);
262 extra_headers = subject_buffer;
263 get_patch_filename(opt->numbered_files ? NULL : commit, opt->nr,
265 opt->patch_suffix, &filename);
266 snprintf(buffer, sizeof(buffer) - 1,
267 "\n--%s%s\n"
268 "Content-Type: text/x-patch;"
269 " name=\"%s\"\n"
270 "Content-Transfer-Encoding: 8bit\n"
271 "Content-Disposition: %s;"
272 " filename=\"%s\"\n\n",
273 mime_boundary_leader, opt->mime_boundary,
274 filename.buf,
275 opt->no_inline ? "attachment" : "inline",
276 filename.buf);
277 opt->diffopt.stat_sep = buffer;
278 strbuf_release(&filename);
279 }
280 *subject_p = subject;
281 *extra_headers_p = extra_headers;
282}
283void show_log(struct rev_info *opt)
285{
286 struct strbuf msgbuf = STRBUF_INIT;
287 struct log_info *log = opt->loginfo;
288 struct commit *commit = log->commit, *parent = log->parent;
289 int abbrev = opt->diffopt.abbrev;
290 int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
291 const char *subject = NULL, *extra_headers = opt->extra_headers;
292 int need_8bit_cte = 0;
293 opt->loginfo = NULL;
295 if (!opt->verbose_header) {
296 graph_show_commit(opt->graph);
297 if (!opt->graph) {
299 if (commit->object.flags & BOUNDARY)
300 putchar('-');
301 else if (commit->object.flags & UNINTERESTING)
302 putchar('^');
303 else if (opt->left_right) {
304 if (commit->object.flags & SYMMETRIC_LEFT)
305 putchar('<');
306 else
307 putchar('>');
308 }
309 }
310 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
311 if (opt->print_parents)
312 show_parents(commit, abbrev_commit);
313 show_decorations(opt, commit);
314 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
315 putchar('\n');
316 graph_show_remainder(opt->graph);
317 }
318 putchar(opt->diffopt.line_termination);
319 return;
320 }
321 /*
323 * If use_terminator is set, add a newline at the end of the entry.
324 * Otherwise, add a diffopt.line_termination character before all
325 * entries but the first. (IOW, as a separator between entries)
326 */
327 if (opt->shown_one && !opt->use_terminator) {
328 /*
329 * If entries are separated by a newline, the output
330 * should look human-readable. If the last entry ended
331 * with a newline, print the graph output before this
332 * newline. Otherwise it will end up as a completely blank
333 * line and will look like a gap in the graph.
334 *
335 * If the entry separator is not a newline, the output is
336 * primarily intended for programmatic consumption, and we
337 * never want the extra graph output before the entry
338 * separator.
339 */
340 if (opt->diffopt.line_termination == '\n' &&
341 !opt->missing_newline)
342 graph_show_padding(opt->graph);
343 putchar(opt->diffopt.line_termination);
344 }
345 opt->shown_one = 1;
346 /*
348 * If the history graph was requested,
349 * print the graph, up to this commit's line
350 */
351 graph_show_commit(opt->graph);
352 /*
354 * Print header line of header..
355 */
356 if (opt->commit_format == CMIT_FMT_EMAIL) {
358 log_write_email_headers(opt, commit, &subject, &extra_headers,
359 &need_8bit_cte);
360 } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
361 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
362 if (opt->commit_format != CMIT_FMT_ONELINE)
363 fputs("commit ", stdout);
364 if (!opt->graph) {
366 if (commit->object.flags & BOUNDARY)
367 putchar('-');
368 else if (commit->object.flags & UNINTERESTING)
369 putchar('^');
370 else if (opt->left_right) {
371 if (commit->object.flags & SYMMETRIC_LEFT)
372 putchar('<');
373 else
374 putchar('>');
375 }
376 }
377 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
378 stdout);
379 if (opt->print_parents)
380 show_parents(commit, abbrev_commit);
381 if (parent)
382 printf(" (from %s)",
383 find_unique_abbrev(parent->object.sha1,
384 abbrev_commit));
385 show_decorations(opt, commit);
386 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
387 if (opt->commit_format == CMIT_FMT_ONELINE) {
388 putchar(' ');
389 } else {
390 putchar('\n');
391 graph_show_oneline(opt->graph);
392 }
393 if (opt->reflog_info) {
394 /*
395 * setup_revisions() ensures that opt->reflog_info
396 * and opt->graph cannot both be set,
397 * so we don't need to worry about printing the
398 * graph info here.
399 */
400 show_reflog_message(opt->reflog_info,
401 opt->commit_format == CMIT_FMT_ONELINE,
402 opt->date_mode);
403 if (opt->commit_format == CMIT_FMT_ONELINE)
404 return;
405 }
406 }
407 if (!commit->buffer)
409 return;
410 /*
412 * And then the pretty-printed message itself
413 */
414 if (need_8bit_cte >= 0)
415 need_8bit_cte = has_non_ascii(opt->add_signoff);
416 pretty_print_commit(opt->commit_format, commit, &msgbuf,
417 abbrev, subject, extra_headers, opt->date_mode,
418 need_8bit_cte);
419 if (opt->add_signoff)
421 append_signoff(&msgbuf, opt->add_signoff);
422 if (opt->show_log_size) {
423 printf("log size %i\n", (int)msgbuf.len);
424 graph_show_oneline(opt->graph);
425 }
426 /*
428 * Set opt->missing_newline if msgbuf doesn't
429 * end in a newline (including if it is empty)
430 */
431 if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
432 opt->missing_newline = 1;
433 else
434 opt->missing_newline = 0;
435 if (opt->graph)
437 graph_show_commit_msg(opt->graph, &msgbuf);
438 else
439 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
440 if (opt->use_terminator) {
441 if (!opt->missing_newline)
442 graph_show_padding(opt->graph);
443 putchar('\n');
444 }
445 strbuf_release(&msgbuf);
447}
448int log_tree_diff_flush(struct rev_info *opt)
450{
451 diffcore_std(&opt->diffopt);
452 if (diff_queue_is_empty()) {
454 int saved_fmt = opt->diffopt.output_format;
455 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
456 diff_flush(&opt->diffopt);
457 opt->diffopt.output_format = saved_fmt;
458 return 0;
459 }
460 if (opt->loginfo && !opt->no_commit_id) {
462 /* When showing a verbose header (i.e. log message),
463 * and not in --pretty=oneline format, we would want
464 * an extra newline between the end of log and the
465 * output for readability.
466 */
467 show_log(opt);
468 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
469 opt->verbose_header &&
470 opt->commit_format != CMIT_FMT_ONELINE) {
471 int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
472 if ((pch & opt->diffopt.output_format) == pch)
473 printf("---");
474 putchar('\n');
475 }
476 }
477 diff_flush(&opt->diffopt);
478 return 1;
479}
480static int do_diff_combined(struct rev_info *opt, struct commit *commit)
482{
483 unsigned const char *sha1 = commit->object.sha1;
484 diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
486 return !opt->loginfo;
487}
488/*
490 * Show the diff of a commit.
491 *
492 * Return true if we printed any log info messages
493 */
494static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
495{
496 int showed_log;
497 struct commit_list *parents;
498 unsigned const char *sha1 = commit->object.sha1;
499 if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
501 return 0;
502 /* Root commit? */
504 parents = commit->parents;
505 if (!parents) {
506 if (opt->show_root_diff) {
507 diff_root_tree_sha1(sha1, "", &opt->diffopt);
508 log_tree_diff_flush(opt);
509 }
510 return !opt->loginfo;
511 }
512 /* More than one parent? */
514 if (parents && parents->next) {
515 if (opt->ignore_merges)
516 return 0;
517 else if (opt->combine_merges)
518 return do_diff_combined(opt, commit);
519 /* If we show individual diffs, show the parent info */
521 log->parent = parents->item;
522 }
523 showed_log = 0;
525 for (;;) {
526 struct commit *parent = parents->item;
527 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
529 log_tree_diff_flush(opt);
530 showed_log |= !opt->loginfo;
532 /* Set up the log info for the next parent, if any.. */
534 parents = parents->next;
535 if (!parents)
536 break;
537 log->parent = parents->item;
538 opt->loginfo = log;
539 }
540 return showed_log;
541}
542int log_tree_commit(struct rev_info *opt, struct commit *commit)
544{
545 struct log_info log;
546 int shown;
547 log.commit = commit;
549 log.parent = NULL;
550 opt->loginfo = &log;
551 shown = log_tree_diff(opt, commit, &log);
553 if (!shown && opt->loginfo && opt->always_show_header) {
554 log.parent = NULL;
555 show_log(opt);
556 shown = 1;
557 }
558 opt->loginfo = NULL;
559 maybe_flush_or_die(stdout, "stdout");
560 return shown;
561}