git.oblomov.eu Git - git/blob - log-tree.c

   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
  12 struct decoration name_decoration = { "object names" };
  13
  14 enum decoration_type {
  15         DECORATION_NONE = 0,
  16         DECORATION_REF_LOCAL,
  17         DECORATION_REF_REMOTE,
  18         DECORATION_REF_TAG,
  19         DECORATION_REF_STASH,
  20         DECORATION_REF_HEAD,
  21         DECORATION_GRAFTED,
  22 };
  23
  24 static char decoration_colors[][COLOR_MAXLEN] = {
  25         GIT_COLOR_RESET,
  26         GIT_COLOR_BOLD_GREEN,   /* REF_LOCAL */
  27         GIT_COLOR_BOLD_RED,     /* REF_REMOTE */
  28         GIT_COLOR_BOLD_YELLOW,  /* REF_TAG */
  29         GIT_COLOR_BOLD_MAGENTA, /* REF_STASH */
  30         GIT_COLOR_BOLD_CYAN,    /* REF_HEAD */
  31         GIT_COLOR_BOLD_BLUE,    /* GRAFTED */
  32 };
  33
  34 static const char *decorate_get_color(int decorate_use_color, enum decoration_type ix)
  35 {
  36         if (want_color(decorate_use_color))
  37                 return decoration_colors[ix];
  38         return "";
  39 }
  40
  41 static int parse_decorate_color_slot(const char *slot)
  42 {
  43         /*
  44          * We're comparing with 'ignore-case' on
  45          * (because config.c sets them all tolower),
  46          * but let's match the letters in the literal
  47          * string values here with how they are
  48          * documented in Documentation/config.txt, for
  49          * consistency.
  50          *
  51          * We love being consistent, don't we?
  52          */
  53         if (!strcasecmp(slot, "branch"))
  54                 return DECORATION_REF_LOCAL;
  55         if (!strcasecmp(slot, "remoteBranch"))
  56                 return DECORATION_REF_REMOTE;
  57         if (!strcasecmp(slot, "tag"))
  58                 return DECORATION_REF_TAG;
  59         if (!strcasecmp(slot, "stash"))
  60                 return DECORATION_REF_STASH;
  61         if (!strcasecmp(slot, "HEAD"))
  62                 return DECORATION_REF_HEAD;
  63         return -1;
  64 }
  65
  66 int parse_decorate_color_config(const char *var, const int ofs, const char *value)
  67 {
  68         int slot = parse_decorate_color_slot(var + ofs);
  69         if (slot < 0)
  70                 return 0;
  71         if (!value)
  72                 return config_error_nonbool(var);
  73         color_parse(value, var, decoration_colors[slot]);
  74         return 0;
  75 }
  76
  77 /*
  78  * log-tree.c uses DIFF_OPT_TST for determining whether to use color
  79  * for showing the commit sha1, use the same check for --decorate
  80  */
  81 #define decorate_get_color_opt(o, ix) \
  82         decorate_get_color((o)->use_color, ix)
  83
  84 static void add_name_decoration(enum decoration_type type, const char *name, struct object *obj)
  85 {
  86         int nlen = strlen(name);
  87         struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + nlen);
  88         memcpy(res->name, name, nlen + 1);
  89         res->type = type;
  90         res->next = add_decoration(&name_decoration, obj, res);
  91 }
  92
  93 static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
  94 {
  95         struct object *obj;
  96         enum decoration_type type = DECORATION_NONE;
  97
  98         if (!prefixcmp(refname, "refs/replace/")) {
  99                 unsigned char original_sha1[20];
 100                 if (get_sha1_hex(refname + 13, original_sha1)) {
 101                         warning("invalid replace ref %s", refname);
 102                         return 0;
 103                 }
 104                 obj = parse_object(original_sha1);
 105                 if (obj)
 106                         add_name_decoration(DECORATION_GRAFTED, "replaced", obj);
 107                 return 0;
 108         }
 109
 110         obj = parse_object(sha1);
 111         if (!obj)
 112                 return 0;
 113
 114         if (!prefixcmp(refname, "refs/heads/"))
 115                 type = DECORATION_REF_LOCAL;
 116         else if (!prefixcmp(refname, "refs/remotes/"))
 117                 type = DECORATION_REF_REMOTE;
 118         else if (!prefixcmp(refname, "refs/tags/"))
 119                 type = DECORATION_REF_TAG;
 120         else if (!prefixcmp(refname, "refs/stash"))
 121                 type = DECORATION_REF_STASH;
 122         else if (!prefixcmp(refname, "HEAD"))
 123                 type = DECORATION_REF_HEAD;
 124
 125         if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
 126                 refname = prettify_refname(refname);
 127         add_name_decoration(type, refname, obj);
 128         while (obj->type == OBJ_TAG) {
 129                 obj = ((struct tag *)obj)->tagged;
 130                 if (!obj)
 131                         break;
 132                 add_name_decoration(DECORATION_REF_TAG, refname, obj);
 133         }
 134         return 0;
 135 }
 136
 137 static int add_graft_decoration(const struct commit_graft *graft, void *cb_data)
 138 {
 139         struct commit *commit = lookup_commit(graft->sha1);
 140         if (!commit)
 141                 return 0;
 142         add_name_decoration(DECORATION_GRAFTED, "grafted", &commit->object);
 143         return 0;
 144 }
 145
 146 void load_ref_decorations(int flags)
 147 {
 148         static int loaded;
 149         if (!loaded) {
 150                 loaded = 1;
 151                 for_each_ref(add_ref_decoration, &flags);
 152                 head_ref(add_ref_decoration, &flags);
 153                 for_each_commit_graft(add_graft_decoration, NULL);
 154         }
 155 }
 156
 157 static void show_parents(struct commit *commit, int abbrev)
 158 {
 159         struct commit_list *p;
 160         for (p = commit->parents; p ; p = p->next) {
 161                 struct commit *parent = p->item;
 162                 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
 163         }
 164 }
 165
 166 void show_decorations(struct rev_info *opt, struct commit *commit)
 167 {
 168         const char *prefix;
 169         struct name_decoration *decoration;
 170         const char *color_commit =
 171                 diff_get_color_opt(&opt->diffopt, DIFF_COMMIT);
 172         const char *color_reset =
 173                 decorate_get_color_opt(&opt->diffopt, DECORATION_NONE);
 174
 175         if (opt->show_source && commit->util)
 176                 printf("\t%s", (char *) commit->util);
 177         if (!opt->show_decorations)
 178                 return;
 179         decoration = lookup_decoration(&name_decoration, &commit->object);
 180         if (!decoration)
 181                 return;
 182         prefix = " (";
 183         while (decoration) {
 184                 printf("%s", prefix);
 185                 fputs(decorate_get_color_opt(&opt->diffopt, decoration->type),
 186                       stdout);
 187                 if (decoration->type == DECORATION_REF_TAG)
 188                         fputs("tag: ", stdout);
 189                 printf("%s", decoration->name);
 190                 fputs(color_reset, stdout);
 191                 fputs(color_commit, stdout);
 192                 prefix = ", ";
 193                 decoration = decoration->next;
 194         }
 195         putchar(')');
 196 }
 197
 198 /*
 199  * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
 200  * Signed-off-by: and Acked-by: lines.
 201  */
 202 static int detect_any_signoff(char *letter, int size)
 203 {
 204         char *cp;
 205         int seen_colon = 0;
 206         int seen_at = 0;
 207         int seen_name = 0;
 208         int seen_head = 0;
 209
 210         cp = letter + size;
 211         while (letter <= --cp && *cp == '\n')
 212                 continue;
 213
 214         while (letter <= cp) {
 215                 char ch = *cp--;
 216                 if (ch == '\n')
 217                         break;
 218
 219                 if (!seen_at) {
 220                         if (ch == '@')
 221                                 seen_at = 1;
 222                         continue;
 223                 }
 224                 if (!seen_colon) {
 225                         if (ch == '@')
 226                                 return 0;
 227                         else if (ch == ':')
 228                                 seen_colon = 1;
 229                         else
 230                                 seen_name = 1;
 231                         continue;
 232                 }
 233                 if (('A' <= ch && ch <= 'Z') ||
 234                     ('a' <= ch && ch <= 'z') ||
 235                     ch == '-') {
 236                         seen_head = 1;
 237                         continue;
 238                 }
 239                 /* no empty last line doesn't match */
 240                 return 0;
 241         }
 242         return seen_head && seen_name;
 243 }
 244
 245 static void append_signoff(struct strbuf *sb, const char *signoff)
 246 {
 247         static const char signed_off_by[] = "Signed-off-by: ";
 248         size_t signoff_len = strlen(signoff);
 249         int has_signoff = 0;
 250         char *cp;
 251
 252         cp = sb->buf;
 253
 254         /* First see if we already have the sign-off by the signer */
 255         while ((cp = strstr(cp, signed_off_by))) {
 256
 257                 has_signoff = 1;
 258
 259                 cp += strlen(signed_off_by);
 260                 if (cp + signoff_len >= sb->buf + sb->len)
 261                         break;
 262                 if (strncmp(cp, signoff, signoff_len))
 263                         continue;
 264                 if (!isspace(cp[signoff_len]))
 265                         continue;
 266                 /* we already have him */
 267                 return;
 268         }
 269
 270         if (!has_signoff)
 271                 has_signoff = detect_any_signoff(sb->buf, sb->len);
 272
 273         if (!has_signoff)
 274                 strbuf_addch(sb, '\n');
 275
 276         strbuf_addstr(sb, signed_off_by);
 277         strbuf_add(sb, signoff, signoff_len);
 278         strbuf_addch(sb, '\n');
 279 }
 280
 281 static unsigned int digits_in_number(unsigned int number)
 282 {
 283         unsigned int i = 10, result = 1;
 284         while (i <= number) {
 285                 i *= 10;
 286                 result++;
 287         }
 288         return result;
 289 }
 290
 291 void get_patch_filename(struct commit *commit, int nr, const char *suffix,
 292                         struct strbuf *buf)
 293 {
 294         int suffix_len = strlen(suffix) + 1;
 295         int start_len = buf->len;
 296
 297         strbuf_addf(buf, commit ? "%04d-" : "%d", nr);
 298         if (commit) {
 299                 int max_len = start_len + FORMAT_PATCH_NAME_MAX - suffix_len;
 300                 struct pretty_print_context ctx = {0};
 301                 ctx.date_mode = DATE_NORMAL;
 302
 303                 format_commit_message(commit, "%f", buf, &ctx);
 304                 if (max_len < buf->len)
 305                         strbuf_setlen(buf, max_len);
 306                 strbuf_addstr(buf, suffix);
 307         }
 308 }
 309
 310 void log_write_email_headers(struct rev_info *opt, struct commit *commit,
 311                              const char **subject_p,
 312                              const char **extra_headers_p,
 313                              int *need_8bit_cte_p)
 314 {
 315         const char *subject = NULL;
 316         const char *extra_headers = opt->extra_headers;
 317         const char *name = sha1_to_hex(commit->object.sha1);
 318
 319         *need_8bit_cte_p = 0; /* unknown */
 320         if (opt->total > 0) {
 321                 static char buffer[64];
 322                 snprintf(buffer, sizeof(buffer),
 323                          "Subject: [%s%s%0*d/%d] ",
 324                          opt->subject_prefix,
 325                          *opt->subject_prefix ? " " : "",
 326                          digits_in_number(opt->total),
 327                          opt->nr, opt->total);
 328                 subject = buffer;
 329         } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 330                 static char buffer[256];
 331                 snprintf(buffer, sizeof(buffer),
 332                          "Subject: [%s] ",
 333                          opt->subject_prefix);
 334                 subject = buffer;
 335         } else {
 336                 subject = "Subject: ";
 337         }
 338
 339         printf("From %s Mon Sep 17 00:00:00 2001\n", name);
 340         graph_show_oneline(opt->graph);
 341         if (opt->message_id) {
 342                 printf("Message-Id: <%s>\n", opt->message_id);
 343                 graph_show_oneline(opt->graph);
 344         }
 345         if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
 346                 int i, n;
 347                 n = opt->ref_message_ids->nr;
 348                 printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
 349                 for (i = 0; i < n; i++)
 350                         printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
 351                                opt->ref_message_ids->items[i].string);
 352                 graph_show_oneline(opt->graph);
 353         }
 354         if (opt->mime_boundary) {
 355                 static char subject_buffer[1024];
 356                 static char buffer[1024];
 357                 struct strbuf filename =  STRBUF_INIT;
 358                 *need_8bit_cte_p = -1; /* NEVER */
 359                 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 360                          "%s"
 361                          "MIME-Version: 1.0\n"
 362                          "Content-Type: multipart/mixed;"
 363                          " boundary=\"%s%s\"\n"
 364                          "\n"
 365                          "This is a multi-part message in MIME "
 366                          "format.\n"
 367                          "--%s%s\n"
 368                          "Content-Type: text/plain; "
 369                          "charset=UTF-8; format=fixed\n"
 370                          "Content-Transfer-Encoding: 8bit\n\n",
 371                          extra_headers ? extra_headers : "",
 372                          mime_boundary_leader, opt->mime_boundary,
 373                          mime_boundary_leader, opt->mime_boundary);
 374                 extra_headers = subject_buffer;
 375
 376                 get_patch_filename(opt->numbered_files ? NULL : commit, opt->nr,
 377                                     opt->patch_suffix, &filename);
 378                 snprintf(buffer, sizeof(buffer) - 1,
 379                          "\n--%s%s\n"
 380                          "Content-Type: text/x-patch;"
 381                          " name=\"%s\"\n"
 382                          "Content-Transfer-Encoding: 8bit\n"
 383                          "Content-Disposition: %s;"
 384                          " filename=\"%s\"\n\n",
 385                          mime_boundary_leader, opt->mime_boundary,
 386                          filename.buf,
 387                          opt->no_inline ? "attachment" : "inline",
 388                          filename.buf);
 389                 opt->diffopt.stat_sep = buffer;
 390                 strbuf_release(&filename);
 391         }
 392         *subject_p = subject;
 393         *extra_headers_p = extra_headers;
 394 }
 395
 396 void show_log(struct rev_info *opt)
 397 {
 398         struct strbuf msgbuf = STRBUF_INIT;
 399         struct log_info *log = opt->loginfo;
 400         struct commit *commit = log->commit, *parent = log->parent;
 401         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 402         const char *extra_headers = opt->extra_headers;
 403         struct pretty_print_context ctx = {0};
 404
 405         opt->loginfo = NULL;
 406         ctx.show_notes = opt->show_notes;
 407         if (!opt->verbose_header) {
 408                 graph_show_commit(opt->graph);
 409
 410                 if (!opt->graph)
 411                         put_revision_mark(opt, commit);
 412                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 413                 if (opt->print_parents)
 414                         show_parents(commit, abbrev_commit);
 415                 show_decorations(opt, commit);
 416                 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
 417                         putchar('\n');
 418                         graph_show_remainder(opt->graph);
 419                 }
 420                 putchar(opt->diffopt.line_termination);
 421                 return;
 422         }
 423
 424         /*
 425          * If use_terminator is set, we already handled any record termination
 426          * at the end of the last record.
 427          * Otherwise, add a diffopt.line_termination character before all
 428          * entries but the first.  (IOW, as a separator between entries)
 429          */
 430         if (opt->shown_one && !opt->use_terminator) {
 431                 /*
 432                  * If entries are separated by a newline, the output
 433                  * should look human-readable.  If the last entry ended
 434                  * with a newline, print the graph output before this
 435                  * newline.  Otherwise it will end up as a completely blank
 436                  * line and will look like a gap in the graph.
 437                  *
 438                  * If the entry separator is not a newline, the output is
 439                  * primarily intended for programmatic consumption, and we
 440                  * never want the extra graph output before the entry
 441                  * separator.
 442                  */
 443                 if (opt->diffopt.line_termination == '\n' &&
 444                     !opt->missing_newline)
 445                         graph_show_padding(opt->graph);
 446                 putchar(opt->diffopt.line_termination);
 447         }
 448         opt->shown_one = 1;
 449
 450         /*
 451          * If the history graph was requested,
 452          * print the graph, up to this commit's line
 453          */
 454         graph_show_commit(opt->graph);
 455
 456         /*
 457          * Print header line of header..
 458          */
 459
 460         if (opt->commit_format == CMIT_FMT_EMAIL) {
 461                 log_write_email_headers(opt, commit, &ctx.subject, &extra_headers,
 462                                         &ctx.need_8bit_cte);
 463         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 464                 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
 465                 if (opt->commit_format != CMIT_FMT_ONELINE)
 466                         fputs("commit ", stdout);
 467
 468                 if (!opt->graph)
 469                         put_revision_mark(opt, commit);
 470                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
 471                       stdout);
 472                 if (opt->print_parents)
 473                         show_parents(commit, abbrev_commit);
 474                 if (parent)
 475                         printf(" (from %s)",
 476                                find_unique_abbrev(parent->object.sha1,
 477                                                   abbrev_commit));
 478                 show_decorations(opt, commit);
 479                 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
 480                 if (opt->commit_format == CMIT_FMT_ONELINE) {
 481                         putchar(' ');
 482                 } else {
 483                         putchar('\n');
 484                         graph_show_oneline(opt->graph);
 485                 }
 486                 if (opt->reflog_info) {
 487                         /*
 488                          * setup_revisions() ensures that opt->reflog_info
 489                          * and opt->graph cannot both be set,
 490                          * so we don't need to worry about printing the
 491                          * graph info here.
 492                          */
 493                         show_reflog_message(opt->reflog_info,
 494                                     opt->commit_format == CMIT_FMT_ONELINE,
 495                                     opt->date_mode_explicit ?
 496                                         opt->date_mode :
 497                                         DATE_NORMAL);
 498                         if (opt->commit_format == CMIT_FMT_ONELINE)
 499                                 return;
 500                 }
 501         }
 502
 503         if (!commit->buffer)
 504                 return;
 505
 506         /*
 507          * And then the pretty-printed message itself
 508          */
 509         if (ctx.need_8bit_cte >= 0)
 510                 ctx.need_8bit_cte = has_non_ascii(opt->add_signoff);
 511         ctx.date_mode = opt->date_mode;
 512         ctx.abbrev = opt->diffopt.abbrev;
 513         ctx.after_subject = extra_headers;
 514         ctx.preserve_subject = opt->preserve_subject;
 515         ctx.reflog_info = opt->reflog_info;
 516         ctx.fmt = opt->commit_format;
 517         pretty_print_commit(&ctx, commit, &msgbuf);
 518
 519         if (opt->add_signoff)
 520                 append_signoff(&msgbuf, opt->add_signoff);
 521         if (opt->show_log_size) {
 522                 printf("log size %i\n", (int)msgbuf.len);
 523                 graph_show_oneline(opt->graph);
 524         }
 525
 526         /*
 527          * Set opt->missing_newline if msgbuf doesn't
 528          * end in a newline (including if it is empty)
 529          */
 530         if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
 531                 opt->missing_newline = 1;
 532         else
 533                 opt->missing_newline = 0;
 534
 535         if (opt->graph)
 536                 graph_show_commit_msg(opt->graph, &msgbuf);
 537         else
 538                 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
 539         if (opt->use_terminator) {
 540                 if (!opt->missing_newline)
 541                         graph_show_padding(opt->graph);
 542                 putchar('\n');
 543         }
 544
 545         strbuf_release(&msgbuf);
 546 }
 547
 548 int log_tree_diff_flush(struct rev_info *opt)
 549 {
 550         diffcore_std(&opt->diffopt);
 551
 552         if (diff_queue_is_empty()) {
 553                 int saved_fmt = opt->diffopt.output_format;
 554                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 555                 diff_flush(&opt->diffopt);
 556                 opt->diffopt.output_format = saved_fmt;
 557                 return 0;
 558         }
 559
 560         if (opt->loginfo && !opt->no_commit_id) {
 561                 /* When showing a verbose header (i.e. log message),
 562                  * and not in --pretty=oneline format, we would want
 563                  * an extra newline between the end of log and the
 564                  * output for readability.
 565                  */
 566                 show_log(opt);
 567                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 568                     opt->verbose_header &&
 569                     opt->commit_format != CMIT_FMT_ONELINE) {
 570                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 571                         if ((pch & opt->diffopt.output_format) == pch)
 572                                 printf("---");
 573                         if (opt->diffopt.output_prefix) {
 574                                 struct strbuf *msg = NULL;
 575                                 msg = opt->diffopt.output_prefix(&opt->diffopt,
 576                                         opt->diffopt.output_prefix_data);
 577                                 fwrite(msg->buf, msg->len, 1, stdout);
 578                         }
 579                         putchar('\n');
 580                 }
 581         }
 582         diff_flush(&opt->diffopt);
 583         return 1;
 584 }
 585
 586 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 587 {
 588         unsigned const char *sha1 = commit->object.sha1;
 589
 590         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 591         return !opt->loginfo;
 592 }
 593
 594 /*
 595  * Show the diff of a commit.
 596  *
 597  * Return true if we printed any log info messages
 598  */
 599 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 600 {
 601         int showed_log;
 602         struct commit_list *parents;
 603         unsigned const char *sha1 = commit->object.sha1;
 604
 605         if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
 606                 return 0;
 607
 608         /* Root commit? */
 609         parents = commit->parents;
 610         if (!parents) {
 611                 if (opt->show_root_diff) {
 612                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 613                         log_tree_diff_flush(opt);
 614                 }
 615                 return !opt->loginfo;
 616         }
 617
 618         /* More than one parent? */
 619         if (parents && parents->next) {
 620                 if (opt->ignore_merges)
 621                         return 0;
 622                 else if (opt->combine_merges)
 623                         return do_diff_combined(opt, commit);
 624                 else if (opt->first_parent_only) {
 625                         /*
 626                          * Generate merge log entry only for the first
 627                          * parent, showing summary diff of the others
 628                          * we merged _in_.
 629                          */
 630                         diff_tree_sha1(parents->item->object.sha1, sha1, "", &opt->diffopt);
 631                         log_tree_diff_flush(opt);
 632                         return !opt->loginfo;
 633                 }
 634
 635                 /* If we show individual diffs, show the parent info */
 636                 log->parent = parents->item;
 637         }
 638
 639         showed_log = 0;
 640         for (;;) {
 641                 struct commit *parent = parents->item;
 642
 643                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 644                 log_tree_diff_flush(opt);
 645
 646                 showed_log |= !opt->loginfo;
 647
 648                 /* Set up the log info for the next parent, if any.. */
 649                 parents = parents->next;
 650                 if (!parents)
 651                         break;
 652                 log->parent = parents->item;
 653                 opt->loginfo = log;
 654         }
 655         return showed_log;
 656 }
 657
 658 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 659 {
 660         struct log_info log;
 661         int shown;
 662
 663         log.commit = commit;
 664         log.parent = NULL;
 665         opt->loginfo = &log;
 666
 667         shown = log_tree_diff(opt, commit, &log);
 668         if (!shown && opt->loginfo && opt->always_show_header) {
 669                 log.parent = NULL;
 670                 show_log(opt);
 671                 shown = 1;
 672         }
 673         opt->loginfo = NULL;
 674         maybe_flush_or_die(stdout, "stdout");
 675         return shown;
 676 }