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"
10#include "color.h"
11#include "gpg-interface.h"
12#include "sequencer.h"
13struct decoration name_decoration = { "object names" };
15enum decoration_type {
17 DECORATION_NONE = 0,
18 DECORATION_REF_LOCAL,
19 DECORATION_REF_REMOTE,
20 DECORATION_REF_TAG,
21 DECORATION_REF_STASH,
22 DECORATION_REF_HEAD,
23 DECORATION_GRAFTED,
24};
25static char decoration_colors[][COLOR_MAXLEN] = {
27 GIT_COLOR_RESET,
28 GIT_COLOR_BOLD_GREEN, /* REF_LOCAL */
29 GIT_COLOR_BOLD_RED, /* REF_REMOTE */
30 GIT_COLOR_BOLD_YELLOW, /* REF_TAG */
31 GIT_COLOR_BOLD_MAGENTA, /* REF_STASH */
32 GIT_COLOR_BOLD_CYAN, /* REF_HEAD */
33 GIT_COLOR_BOLD_BLUE, /* GRAFTED */
34};
35static const char *decorate_get_color(int decorate_use_color, enum decoration_type ix)
37{
38 if (want_color(decorate_use_color))
39 return decoration_colors[ix];
40 return "";
41}
42static int parse_decorate_color_slot(const char *slot)
44{
45 /*
46 * We're comparing with 'ignore-case' on
47 * (because config.c sets them all tolower),
48 * but let's match the letters in the literal
49 * string values here with how they are
50 * documented in Documentation/config.txt, for
51 * consistency.
52 *
53 * We love being consistent, don't we?
54 */
55 if (!strcasecmp(slot, "branch"))
56 return DECORATION_REF_LOCAL;
57 if (!strcasecmp(slot, "remoteBranch"))
58 return DECORATION_REF_REMOTE;
59 if (!strcasecmp(slot, "tag"))
60 return DECORATION_REF_TAG;
61 if (!strcasecmp(slot, "stash"))
62 return DECORATION_REF_STASH;
63 if (!strcasecmp(slot, "HEAD"))
64 return DECORATION_REF_HEAD;
65 return -1;
66}
67int parse_decorate_color_config(const char *var, const int ofs, const char *value)
69{
70 int slot = parse_decorate_color_slot(var + ofs);
71 if (slot < 0)
72 return 0;
73 if (!value)
74 return config_error_nonbool(var);
75 color_parse(value, var, decoration_colors[slot]);
76 return 0;
77}
78/*
80 * log-tree.c uses DIFF_OPT_TST for determining whether to use color
81 * for showing the commit sha1, use the same check for --decorate
82 */
83#define decorate_get_color_opt(o, ix) \
84 decorate_get_color((o)->use_color, ix)
85static void add_name_decoration(enum decoration_type type, const char *name, struct object *obj)
87{
88 int nlen = strlen(name);
89 struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + nlen);
90 memcpy(res->name, name, nlen + 1);
91 res->type = type;
92 res->next = add_decoration(&name_decoration, obj, res);
93}
94static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
96{
97 struct object *obj;
98 enum decoration_type type = DECORATION_NONE;
99 if (!prefixcmp(refname, "refs/replace/")) {
101 unsigned char original_sha1[20];
102 if (!read_replace_refs)
103 return 0;
104 if (get_sha1_hex(refname + 13, original_sha1)) {
105 warning("invalid replace ref %s", refname);
106 return 0;
107 }
108 obj = parse_object(original_sha1);
109 if (obj)
110 add_name_decoration(DECORATION_GRAFTED, "replaced", obj);
111 return 0;
112 }
113 obj = parse_object(sha1);
115 if (!obj)
116 return 0;
117 if (!prefixcmp(refname, "refs/heads/"))
119 type = DECORATION_REF_LOCAL;
120 else if (!prefixcmp(refname, "refs/remotes/"))
121 type = DECORATION_REF_REMOTE;
122 else if (!prefixcmp(refname, "refs/tags/"))
123 type = DECORATION_REF_TAG;
124 else if (!strcmp(refname, "refs/stash"))
125 type = DECORATION_REF_STASH;
126 else if (!strcmp(refname, "HEAD"))
127 type = DECORATION_REF_HEAD;
128 if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
130 refname = prettify_refname(refname);
131 add_name_decoration(type, refname, obj);
132 while (obj->type == OBJ_TAG) {
133 obj = ((struct tag *)obj)->tagged;
134 if (!obj)
135 break;
136 add_name_decoration(DECORATION_REF_TAG, refname, obj);
137 }
138 return 0;
139}
140static int add_graft_decoration(const struct commit_graft *graft, void *cb_data)
142{
143 struct commit *commit = lookup_commit(graft->sha1);
144 if (!commit)
145 return 0;
146 add_name_decoration(DECORATION_GRAFTED, "grafted", &commit->object);
147 return 0;
148}
149void load_ref_decorations(int flags)
151{
152 static int loaded;
153 if (!loaded) {
154 loaded = 1;
155 for_each_ref(add_ref_decoration, &flags);
156 head_ref(add_ref_decoration, &flags);
157 for_each_commit_graft(add_graft_decoration, NULL);
158 }
159}
160static void show_parents(struct commit *commit, int abbrev)
162{
163 struct commit_list *p;
164 for (p = commit->parents; p ; p = p->next) {
165 struct commit *parent = p->item;
166 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
167 }
168}
169static void show_children(struct rev_info *opt, struct commit *commit, int abbrev)
171{
172 struct commit_list *p = lookup_decoration(&opt->children, &commit->object);
173 for ( ; p; p = p->next) {
174 printf(" %s", find_unique_abbrev(p->item->object.sha1, abbrev));
175 }
176}
177void show_decorations(struct rev_info *opt, struct commit *commit)
179{
180 const char *prefix;
181 struct name_decoration *decoration;
182 const char *color_commit =
183 diff_get_color_opt(&opt->diffopt, DIFF_COMMIT);
184 const char *color_reset =
185 decorate_get_color_opt(&opt->diffopt, DECORATION_NONE);
186 if (opt->show_source && commit->util)
188 printf("\t%s", (char *) commit->util);
189 if (!opt->show_decorations)
190 return;
191 decoration = lookup_decoration(&name_decoration, &commit->object);
192 if (!decoration)
193 return;
194 prefix = " (";
195 while (decoration) {
196 printf("%s", prefix);
197 fputs(decorate_get_color_opt(&opt->diffopt, decoration->type),
198 stdout);
199 if (decoration->type == DECORATION_REF_TAG)
200 fputs("tag: ", stdout);
201 printf("%s", decoration->name);
202 fputs(color_reset, stdout);
203 fputs(color_commit, stdout);
204 prefix = ", ";
205 decoration = decoration->next;
206 }
207 putchar(')');
208}
209static unsigned int digits_in_number(unsigned int number)
211{
212 unsigned int i = 10, result = 1;
213 while (i <= number) {
214 i *= 10;
215 result++;
216 }
217 return result;
218}
219void fmt_output_subject(struct strbuf *filename,
221 const char *subject,
222 struct rev_info *info)
223{
224 const char *suffix = info->patch_suffix;
225 int nr = info->nr;
226 int start_len = filename->len;
227 int max_len = start_len + FORMAT_PATCH_NAME_MAX - (strlen(suffix) + 1);
228 if (0 < info->reroll_count)
230 strbuf_addf(filename, "v%d-", info->reroll_count);
231 strbuf_addf(filename, "%04d-%s", nr, subject);
232 if (max_len < filename->len)
234 strbuf_setlen(filename, max_len);
235 strbuf_addstr(filename, suffix);
236}
237void fmt_output_commit(struct strbuf *filename,
239 struct commit *commit,
240 struct rev_info *info)
241{
242 struct pretty_print_context ctx = {0};
243 struct strbuf subject = STRBUF_INIT;
244 format_commit_message(commit, "%f", &subject, &ctx);
246 fmt_output_subject(filename, subject.buf, info);
247 strbuf_release(&subject);
248}
249void log_write_email_headers(struct rev_info *opt, struct commit *commit,
251 const char **subject_p,
252 const char **extra_headers_p,
253 int *need_8bit_cte_p)
254{
255 const char *subject = NULL;
256 const char *extra_headers = opt->extra_headers;
257 const char *name = sha1_to_hex(commit->object.sha1);
258 *need_8bit_cte_p = 0; /* unknown */
260 if (opt->total > 0) {
261 static char buffer[64];
262 snprintf(buffer, sizeof(buffer),
263 "Subject: [%s%s%0*d/%d] ",
264 opt->subject_prefix,
265 *opt->subject_prefix ? " " : "",
266 digits_in_number(opt->total),
267 opt->nr, opt->total);
268 subject = buffer;
269 } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
270 static char buffer[256];
271 snprintf(buffer, sizeof(buffer),
272 "Subject: [%s] ",
273 opt->subject_prefix);
274 subject = buffer;
275 } else {
276 subject = "Subject: ";
277 }
278 printf("From %s Mon Sep 17 00:00:00 2001\n", name);
280 graph_show_oneline(opt->graph);
281 if (opt->message_id) {
282 printf("Message-Id: <%s>\n", opt->message_id);
283 graph_show_oneline(opt->graph);
284 }
285 if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
286 int i, n;
287 n = opt->ref_message_ids->nr;
288 printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
289 for (i = 0; i < n; i++)
290 printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
291 opt->ref_message_ids->items[i].string);
292 graph_show_oneline(opt->graph);
293 }
294 if (opt->mime_boundary) {
295 static char subject_buffer[1024];
296 static char buffer[1024];
297 struct strbuf filename = STRBUF_INIT;
298 *need_8bit_cte_p = -1; /* NEVER */
299 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
300 "%s"
301 "MIME-Version: 1.0\n"
302 "Content-Type: multipart/mixed;"
303 " boundary=\"%s%s\"\n"
304 "\n"
305 "This is a multi-part message in MIME "
306 "format.\n"
307 "--%s%s\n"
308 "Content-Type: text/plain; "
309 "charset=UTF-8; format=fixed\n"
310 "Content-Transfer-Encoding: 8bit\n\n",
311 extra_headers ? extra_headers : "",
312 mime_boundary_leader, opt->mime_boundary,
313 mime_boundary_leader, opt->mime_boundary);
314 extra_headers = subject_buffer;
315 if (opt->numbered_files)
317 strbuf_addf(&filename, "%d", opt->nr);
318 else
319 fmt_output_commit(&filename, commit, opt);
320 snprintf(buffer, sizeof(buffer) - 1,
321 "\n--%s%s\n"
322 "Content-Type: text/x-patch;"
323 " name=\"%s\"\n"
324 "Content-Transfer-Encoding: 8bit\n"
325 "Content-Disposition: %s;"
326 " filename=\"%s\"\n\n",
327 mime_boundary_leader, opt->mime_boundary,
328 filename.buf,
329 opt->no_inline ? "attachment" : "inline",
330 filename.buf);
331 opt->diffopt.stat_sep = buffer;
332 strbuf_release(&filename);
333 }
334 *subject_p = subject;
335 *extra_headers_p = extra_headers;
336}
337static void show_sig_lines(struct rev_info *opt, int status, const char *bol)
339{
340 const char *color, *reset, *eol;
341 color = diff_get_color_opt(&opt->diffopt,
343 status ? DIFF_WHITESPACE : DIFF_FRAGINFO);
344 reset = diff_get_color_opt(&opt->diffopt, DIFF_RESET);
345 while (*bol) {
346 eol = strchrnul(bol, '\n');
347 printf("%s%.*s%s%s", color, (int)(eol - bol), bol, reset,
348 *eol ? "\n" : "");
349 bol = (*eol) ? (eol + 1) : eol;
350 }
351}
352static void show_signature(struct rev_info *opt, struct commit *commit)
354{
355 struct strbuf payload = STRBUF_INIT;
356 struct strbuf signature = STRBUF_INIT;
357 struct strbuf gpg_output = STRBUF_INIT;
358 int status;
359 if (parse_signed_commit(commit->object.sha1, &payload, &signature) <= 0)
361 goto out;
362 status = verify_signed_buffer(payload.buf, payload.len,
364 signature.buf, signature.len,
365 &gpg_output, NULL);
366 if (status && !gpg_output.len)
367 strbuf_addstr(&gpg_output, "No signature\n");
368 show_sig_lines(opt, status, gpg_output.buf);
370 out:
372 strbuf_release(&gpg_output);
373 strbuf_release(&payload);
374 strbuf_release(&signature);
375}
376static int which_parent(const unsigned char *sha1, const struct commit *commit)
378{
379 int nth;
380 const struct commit_list *parent;
381 for (nth = 0, parent = commit->parents; parent; parent = parent->next) {
383 if (!hashcmp(parent->item->object.sha1, sha1))
384 return nth;
385 nth++;
386 }
387 return -1;
388}
389static int is_common_merge(const struct commit *commit)
391{
392 return (commit->parents
393 && commit->parents->next
394 && !commit->parents->next->next);
395}
396static void show_one_mergetag(struct rev_info *opt,
398 struct commit_extra_header *extra,
399 struct commit *commit)
400{
401 unsigned char sha1[20];
402 struct tag *tag;
403 struct strbuf verify_message;
404 int status, nth;
405 size_t payload_size, gpg_message_offset;
406 hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), sha1);
408 tag = lookup_tag(sha1);
409 if (!tag)
410 return; /* error message already given */
411 strbuf_init(&verify_message, 256);
413 if (parse_tag_buffer(tag, extra->value, extra->len))
414 strbuf_addstr(&verify_message, "malformed mergetag\n");
415 else if (is_common_merge(commit) &&
416 !hashcmp(tag->tagged->sha1,
417 commit->parents->next->item->object.sha1))
418 strbuf_addf(&verify_message,
419 "merged tag '%s'\n", tag->tag);
420 else if ((nth = which_parent(tag->tagged->sha1, commit)) < 0)
421 strbuf_addf(&verify_message, "tag %s names a non-parent %s\n",
422 tag->tag, tag->tagged->sha1);
423 else
424 strbuf_addf(&verify_message,
425 "parent #%d, tagged '%s'\n", nth + 1, tag->tag);
426 gpg_message_offset = verify_message.len;
427 payload_size = parse_signature(extra->value, extra->len);
429 status = -1;
430 if (extra->len > payload_size)
431 if (verify_signed_buffer(extra->value, payload_size,
432 extra->value + payload_size,
433 extra->len - payload_size,
434 &verify_message, NULL)) {
435 if (verify_message.len <= gpg_message_offset)
436 strbuf_addstr(&verify_message, "No signature\n");
437 else
438 status = 0;
439 }
440 show_sig_lines(opt, status, verify_message.buf);
442 strbuf_release(&verify_message);
443}
444static void show_mergetag(struct rev_info *opt, struct commit *commit)
446{
447 struct commit_extra_header *extra, *to_free;
448 to_free = read_commit_extra_headers(commit, NULL);
450 for (extra = to_free; extra; extra = extra->next) {
451 if (strcmp(extra->key, "mergetag"))
452 continue; /* not a merge tag */
453 show_one_mergetag(opt, extra, commit);
454 }
455 free_commit_extra_headers(to_free);
456}
457void show_log(struct rev_info *opt)
459{
460 struct strbuf msgbuf = STRBUF_INIT;
461 struct log_info *log = opt->loginfo;
462 struct commit *commit = log->commit, *parent = log->parent;
463 int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
464 const char *extra_headers = opt->extra_headers;
465 struct pretty_print_context ctx = {0};
466 opt->loginfo = NULL;
468 if (!opt->verbose_header) {
469 graph_show_commit(opt->graph);
470 if (!opt->graph)
472 put_revision_mark(opt, commit);
473 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
474 if (opt->print_parents)
475 show_parents(commit, abbrev_commit);
476 if (opt->children.name)
477 show_children(opt, commit, abbrev_commit);
478 show_decorations(opt, commit);
479 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
480 putchar('\n');
481 graph_show_remainder(opt->graph);
482 }
483 putchar(opt->diffopt.line_termination);
484 return;
485 }
486 /*
488 * If use_terminator is set, we already handled any record termination
489 * at the end of the last record.
490 * Otherwise, add a diffopt.line_termination character before all
491 * entries but the first. (IOW, as a separator between entries)
492 */
493 if (opt->shown_one && !opt->use_terminator) {
494 /*
495 * If entries are separated by a newline, the output
496 * should look human-readable. If the last entry ended
497 * with a newline, print the graph output before this
498 * newline. Otherwise it will end up as a completely blank
499 * line and will look like a gap in the graph.
500 *
501 * If the entry separator is not a newline, the output is
502 * primarily intended for programmatic consumption, and we
503 * never want the extra graph output before the entry
504 * separator.
505 */
506 if (opt->diffopt.line_termination == '\n' &&
507 !opt->missing_newline)
508 graph_show_padding(opt->graph);
509 putchar(opt->diffopt.line_termination);
510 }
511 opt->shown_one = 1;
512 /*
514 * If the history graph was requested,
515 * print the graph, up to this commit's line
516 */
517 graph_show_commit(opt->graph);
518 /*
520 * Print header line of header..
521 */
522 if (opt->commit_format == CMIT_FMT_EMAIL) {
524 log_write_email_headers(opt, commit, &ctx.subject, &extra_headers,
525 &ctx.need_8bit_cte);
526 } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
527 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
528 if (opt->commit_format != CMIT_FMT_ONELINE)
529 fputs("commit ", stdout);
530 if (!opt->graph)
532 put_revision_mark(opt, commit);
533 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
534 stdout);
535 if (opt->print_parents)
536 show_parents(commit, abbrev_commit);
537 if (opt->children.name)
538 show_children(opt, commit, abbrev_commit);
539 if (parent)
540 printf(" (from %s)",
541 find_unique_abbrev(parent->object.sha1,
542 abbrev_commit));
543 show_decorations(opt, commit);
544 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
545 if (opt->commit_format == CMIT_FMT_ONELINE) {
546 putchar(' ');
547 } else {
548 putchar('\n');
549 graph_show_oneline(opt->graph);
550 }
551 if (opt->reflog_info) {
552 /*
553 * setup_revisions() ensures that opt->reflog_info
554 * and opt->graph cannot both be set,
555 * so we don't need to worry about printing the
556 * graph info here.
557 */
558 show_reflog_message(opt->reflog_info,
559 opt->commit_format == CMIT_FMT_ONELINE,
560 opt->date_mode,
561 opt->date_mode_explicit);
562 if (opt->commit_format == CMIT_FMT_ONELINE)
563 return;
564 }
565 }
566 if (opt->show_signature) {
568 show_signature(opt, commit);
569 show_mergetag(opt, commit);
570 }
571 if (!commit->buffer)
573 return;
574 if (opt->show_notes) {
576 int raw;
577 struct strbuf notebuf = STRBUF_INIT;
578 raw = (opt->commit_format == CMIT_FMT_USERFORMAT);
580 format_display_notes(commit->object.sha1, ¬ebuf,
581 get_log_output_encoding(), raw);
582 ctx.notes_message = notebuf.len
583 ? strbuf_detach(¬ebuf, NULL)
584 : xcalloc(1, 1);
585 }
586 /*
588 * And then the pretty-printed message itself
589 */
590 if (ctx.need_8bit_cte >= 0 && opt->add_signoff)
591 ctx.need_8bit_cte =
592 has_non_ascii(fmt_name(getenv("GIT_COMMITTER_NAME"),
593 getenv("GIT_COMMITTER_EMAIL")));
594 ctx.date_mode = opt->date_mode;
595 ctx.date_mode_explicit = opt->date_mode_explicit;
596 ctx.abbrev = opt->diffopt.abbrev;
597 ctx.after_subject = extra_headers;
598 ctx.preserve_subject = opt->preserve_subject;
599 ctx.reflog_info = opt->reflog_info;
600 ctx.fmt = opt->commit_format;
601 ctx.mailmap = opt->mailmap;
602 ctx.color = opt->diffopt.use_color;
603 pretty_print_commit(&ctx, commit, &msgbuf);
604 if (opt->add_signoff)
606 append_signoff(&msgbuf, 0, APPEND_SIGNOFF_DEDUP);
607 if ((ctx.fmt != CMIT_FMT_USERFORMAT) &&
609 ctx.notes_message && *ctx.notes_message) {
610 if (ctx.fmt == CMIT_FMT_EMAIL) {
611 strbuf_addstr(&msgbuf, "---\n");
612 opt->shown_dashes = 1;
613 }
614 strbuf_addstr(&msgbuf, ctx.notes_message);
615 }
616 if (opt->show_log_size) {
618 printf("log size %i\n", (int)msgbuf.len);
619 graph_show_oneline(opt->graph);
620 }
621 /*
623 * Set opt->missing_newline if msgbuf doesn't
624 * end in a newline (including if it is empty)
625 */
626 if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
627 opt->missing_newline = 1;
628 else
629 opt->missing_newline = 0;
630 if (opt->graph)
632 graph_show_commit_msg(opt->graph, &msgbuf);
633 else
634 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
635 if (opt->use_terminator) {
636 if (!opt->missing_newline)
637 graph_show_padding(opt->graph);
638 putchar(opt->diffopt.line_termination);
639 }
640 strbuf_release(&msgbuf);
642 free(ctx.notes_message);
643}
644int log_tree_diff_flush(struct rev_info *opt)
646{
647 opt->shown_dashes = 0;
648 diffcore_std(&opt->diffopt);
649 if (diff_queue_is_empty()) {
651 int saved_fmt = opt->diffopt.output_format;
652 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
653 diff_flush(&opt->diffopt);
654 opt->diffopt.output_format = saved_fmt;
655 return 0;
656 }
657 if (opt->loginfo && !opt->no_commit_id) {
659 show_log(opt);
660 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
661 opt->verbose_header &&
662 opt->commit_format != CMIT_FMT_ONELINE) {
663 /*
664 * When showing a verbose header (i.e. log message),
665 * and not in --pretty=oneline format, we would want
666 * an extra newline between the end of log and the
667 * diff/diffstat output for readability.
668 */
669 int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
670 if (opt->diffopt.output_prefix) {
671 struct strbuf *msg = NULL;
672 msg = opt->diffopt.output_prefix(&opt->diffopt,
673 opt->diffopt.output_prefix_data);
674 fwrite(msg->buf, msg->len, 1, stdout);
675 }
676 /*
678 * We may have shown three-dashes line early
679 * between notes and the log message, in which
680 * case we only want a blank line after the
681 * notes without (an extra) three-dashes line.
682 * Otherwise, we show the three-dashes line if
683 * we are showing the patch with diffstat, but
684 * in that case, there is no extra blank line
685 * after the three-dashes line.
686 */
687 if (!opt->shown_dashes &&
688 (pch & opt->diffopt.output_format) == pch)
689 printf("---");
690 putchar('\n');
691 }
692 }
693 diff_flush(&opt->diffopt);
694 return 1;
695}
696static int do_diff_combined(struct rev_info *opt, struct commit *commit)
698{
699 diff_tree_combined_merge(commit, opt->dense_combined_merges, opt);
700 return !opt->loginfo;
701}
702/*
704 * Show the diff of a commit.
705 *
706 * Return true if we printed any log info messages
707 */
708static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
709{
710 int showed_log;
711 struct commit_list *parents;
712 unsigned const char *sha1 = commit->object.sha1;
713 if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
715 return 0;
716 /* Root commit? */
718 parents = commit->parents;
719 if (!parents) {
720 if (opt->show_root_diff) {
721 diff_root_tree_sha1(sha1, "", &opt->diffopt);
722 log_tree_diff_flush(opt);
723 }
724 return !opt->loginfo;
725 }
726 /* More than one parent? */
728 if (parents && parents->next) {
729 if (opt->ignore_merges)
730 return 0;
731 else if (opt->combine_merges)
732 return do_diff_combined(opt, commit);
733 else if (opt->first_parent_only) {
734 /*
735 * Generate merge log entry only for the first
736 * parent, showing summary diff of the others
737 * we merged _in_.
738 */
739 diff_tree_sha1(parents->item->object.sha1, sha1, "", &opt->diffopt);
740 log_tree_diff_flush(opt);
741 return !opt->loginfo;
742 }
743 /* If we show individual diffs, show the parent info */
745 log->parent = parents->item;
746 }
747 showed_log = 0;
749 for (;;) {
750 struct commit *parent = parents->item;
751 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
753 log_tree_diff_flush(opt);
754 showed_log |= !opt->loginfo;
756 /* Set up the log info for the next parent, if any.. */
758 parents = parents->next;
759 if (!parents)
760 break;
761 log->parent = parents->item;
762 opt->loginfo = log;
763 }
764 return showed_log;
765}
766int log_tree_commit(struct rev_info *opt, struct commit *commit)
768{
769 struct log_info log;
770 int shown;
771 log.commit = commit;
773 log.parent = NULL;
774 opt->loginfo = &log;
775 shown = log_tree_diff(opt, commit, &log);
777 if (!shown && opt->loginfo && opt->always_show_header) {
778 log.parent = NULL;
779 show_log(opt);
780 shown = 1;
781 }
782 opt->loginfo = NULL;
783 maybe_flush_or_die(stdout, "stdout");
784 return shown;
785}