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 #include "gpg-interface.h"
  12 #include "sequencer.h"
  13 #include "line-log.h"
  14
  15 struct decoration name_decoration = { "object names" };
  16
  17 enum decoration_type {
  18         DECORATION_NONE = 0,
  19         DECORATION_REF_LOCAL,
  20         DECORATION_REF_REMOTE,
  21         DECORATION_REF_TAG,
  22         DECORATION_REF_STASH,
  23         DECORATION_REF_HEAD,
  24         DECORATION_GRAFTED,
  25 };
  26
  27 static char decoration_colors[][COLOR_MAXLEN] = {
  28         GIT_COLOR_RESET,
  29         GIT_COLOR_BOLD_GREEN,   /* REF_LOCAL */
  30         GIT_COLOR_BOLD_RED,     /* REF_REMOTE */
  31         GIT_COLOR_BOLD_YELLOW,  /* REF_TAG */
  32         GIT_COLOR_BOLD_MAGENTA, /* REF_STASH */
  33         GIT_COLOR_BOLD_CYAN,    /* REF_HEAD */
  34         GIT_COLOR_BOLD_BLUE,    /* GRAFTED */
  35 };
  36
  37 static const char *decorate_get_color(int decorate_use_color, enum decoration_type ix)
  38 {
  39         if (want_color(decorate_use_color))
  40                 return decoration_colors[ix];
  41         return "";
  42 }
  43
  44 static int parse_decorate_color_slot(const char *slot)
  45 {
  46         /*
  47          * We're comparing with 'ignore-case' on
  48          * (because config.c sets them all tolower),
  49          * but let's match the letters in the literal
  50          * string values here with how they are
  51          * documented in Documentation/config.txt, for
  52          * consistency.
  53          *
  54          * We love being consistent, don't we?
  55          */
  56         if (!strcasecmp(slot, "branch"))
  57                 return DECORATION_REF_LOCAL;
  58         if (!strcasecmp(slot, "remoteBranch"))
  59                 return DECORATION_REF_REMOTE;
  60         if (!strcasecmp(slot, "tag"))
  61                 return DECORATION_REF_TAG;
  62         if (!strcasecmp(slot, "stash"))
  63                 return DECORATION_REF_STASH;
  64         if (!strcasecmp(slot, "HEAD"))
  65                 return DECORATION_REF_HEAD;
  66         return -1;
  67 }
  68
  69 int parse_decorate_color_config(const char *var, const char *slot_name, const char *value)
  70 {
  71         int slot = parse_decorate_color_slot(slot_name);
  72         if (slot < 0)
  73                 return 0;
  74         if (!value)
  75                 return config_error_nonbool(var);
  76         return color_parse(value, decoration_colors[slot]);
  77 }
  78
  79 /*
  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)
  85
  86 static 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 }
  94
  95 static 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
 100         if (starts_with(refname, "refs/replace/")) {
 101                 unsigned char original_sha1[20];
 102                 if (!check_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
 114         obj = parse_object(sha1);
 115         if (!obj)
 116                 return 0;
 117
 118         if (starts_with(refname, "refs/heads/"))
 119                 type = DECORATION_REF_LOCAL;
 120         else if (starts_with(refname, "refs/remotes/"))
 121                 type = DECORATION_REF_REMOTE;
 122         else if (starts_with(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
 129         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                 if (!obj->parsed)
 137                         parse_object(obj->sha1);
 138                 add_name_decoration(DECORATION_REF_TAG, refname, obj);
 139         }
 140         return 0;
 141 }
 142
 143 static int add_graft_decoration(const struct commit_graft *graft, void *cb_data)
 144 {
 145         struct commit *commit = lookup_commit(graft->sha1);
 146         if (!commit)
 147                 return 0;
 148         add_name_decoration(DECORATION_GRAFTED, "grafted", &commit->object);
 149         return 0;
 150 }
 151
 152 void load_ref_decorations(int flags)
 153 {
 154         static int loaded;
 155         if (!loaded) {
 156                 loaded = 1;
 157                 for_each_ref(add_ref_decoration, &flags);
 158                 head_ref(add_ref_decoration, &flags);
 159                 for_each_commit_graft(add_graft_decoration, NULL);
 160         }
 161 }
 162
 163 static void show_parents(struct commit *commit, int abbrev)
 164 {
 165         struct commit_list *p;
 166         for (p = commit->parents; p ; p = p->next) {
 167                 struct commit *parent = p->item;
 168                 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
 169         }
 170 }
 171
 172 static void show_children(struct rev_info *opt, struct commit *commit, int abbrev)
 173 {
 174         struct commit_list *p = lookup_decoration(&opt->children, &commit->object);
 175         for ( ; p; p = p->next) {
 176                 printf(" %s", find_unique_abbrev(p->item->object.sha1, abbrev));
 177         }
 178 }
 179
 180 /*
 181  * The caller makes sure there is no funny color before
 182  * calling. format_decorations makes sure the same after return.
 183  */
 184 void format_decorations(struct strbuf *sb,
 185                         const struct commit *commit,
 186                         int use_color)
 187 {
 188         const char *prefix;
 189         struct name_decoration *decoration;
 190         const char *color_commit =
 191                 diff_get_color(use_color, DIFF_COMMIT);
 192         const char *color_reset =
 193                 decorate_get_color(use_color, DECORATION_NONE);
 194
 195         decoration = lookup_decoration(&name_decoration, &commit->object);
 196         if (!decoration)
 197                 return;
 198         prefix = " (";
 199         while (decoration) {
 200                 strbuf_addstr(sb, color_commit);
 201                 strbuf_addstr(sb, prefix);
 202                 strbuf_addstr(sb, decorate_get_color(use_color, decoration->type));
 203                 if (decoration->type == DECORATION_REF_TAG)
 204                         strbuf_addstr(sb, "tag: ");
 205                 strbuf_addstr(sb, decoration->name);
 206                 strbuf_addstr(sb, color_reset);
 207                 prefix = ", ";
 208                 decoration = decoration->next;
 209         }
 210         strbuf_addstr(sb, color_commit);
 211         strbuf_addch(sb, ')');
 212         strbuf_addstr(sb, color_reset);
 213 }
 214
 215 void show_decorations(struct rev_info *opt, struct commit *commit)
 216 {
 217         struct strbuf sb = STRBUF_INIT;
 218
 219         if (opt->show_source && commit->util)
 220                 printf("\t%s", (char *) commit->util);
 221         if (!opt->show_decorations)
 222                 return;
 223         format_decorations(&sb, commit, opt->diffopt.use_color);
 224         fputs(sb.buf, stdout);
 225         strbuf_release(&sb);
 226 }
 227
 228 static unsigned int digits_in_number(unsigned int number)
 229 {
 230         unsigned int i = 10, result = 1;
 231         while (i <= number) {
 232                 i *= 10;
 233                 result++;
 234         }
 235         return result;
 236 }
 237
 238 void fmt_output_subject(struct strbuf *filename,
 239                         const char *subject,
 240                         struct rev_info *info)
 241 {
 242         const char *suffix = info->patch_suffix;
 243         int nr = info->nr;
 244         int start_len = filename->len;
 245         int max_len = start_len + FORMAT_PATCH_NAME_MAX - (strlen(suffix) + 1);
 246
 247         if (0 < info->reroll_count)
 248                 strbuf_addf(filename, "v%d-", info->reroll_count);
 249         strbuf_addf(filename, "%04d-%s", nr, subject);
 250
 251         if (max_len < filename->len)
 252                 strbuf_setlen(filename, max_len);
 253         strbuf_addstr(filename, suffix);
 254 }
 255
 256 void fmt_output_commit(struct strbuf *filename,
 257                        struct commit *commit,
 258                        struct rev_info *info)
 259 {
 260         struct pretty_print_context ctx = {0};
 261         struct strbuf subject = STRBUF_INIT;
 262
 263         format_commit_message(commit, "%f", &subject, &ctx);
 264         fmt_output_subject(filename, subject.buf, info);
 265         strbuf_release(&subject);
 266 }
 267
 268 void log_write_email_headers(struct rev_info *opt, struct commit *commit,
 269                              const char **subject_p,
 270                              const char **extra_headers_p,
 271                              int *need_8bit_cte_p)
 272 {
 273         const char *subject = NULL;
 274         const char *extra_headers = opt->extra_headers;
 275         const char *name = sha1_to_hex(commit->object.sha1);
 276
 277         *need_8bit_cte_p = 0; /* unknown */
 278         if (opt->total > 0) {
 279                 static char buffer[64];
 280                 snprintf(buffer, sizeof(buffer),
 281                          "Subject: [%s%s%0*d/%d] ",
 282                          opt->subject_prefix,
 283                          *opt->subject_prefix ? " " : "",
 284                          digits_in_number(opt->total),
 285                          opt->nr, opt->total);
 286                 subject = buffer;
 287         } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 288                 static char buffer[256];
 289                 snprintf(buffer, sizeof(buffer),
 290                          "Subject: [%s] ",
 291                          opt->subject_prefix);
 292                 subject = buffer;
 293         } else {
 294                 subject = "Subject: ";
 295         }
 296
 297         printf("From %s Mon Sep 17 00:00:00 2001\n", name);
 298         graph_show_oneline(opt->graph);
 299         if (opt->message_id) {
 300                 printf("Message-Id: <%s>\n", opt->message_id);
 301                 graph_show_oneline(opt->graph);
 302         }
 303         if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
 304                 int i, n;
 305                 n = opt->ref_message_ids->nr;
 306                 printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
 307                 for (i = 0; i < n; i++)
 308                         printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
 309                                opt->ref_message_ids->items[i].string);
 310                 graph_show_oneline(opt->graph);
 311         }
 312         if (opt->mime_boundary) {
 313                 static char subject_buffer[1024];
 314                 static char buffer[1024];
 315                 struct strbuf filename =  STRBUF_INIT;
 316                 *need_8bit_cte_p = -1; /* NEVER */
 317                 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 318                          "%s"
 319                          "MIME-Version: 1.0\n"
 320                          "Content-Type: multipart/mixed;"
 321                          " boundary=\"%s%s\"\n"
 322                          "\n"
 323                          "This is a multi-part message in MIME "
 324                          "format.\n"
 325                          "--%s%s\n"
 326                          "Content-Type: text/plain; "
 327                          "charset=UTF-8; format=fixed\n"
 328                          "Content-Transfer-Encoding: 8bit\n\n",
 329                          extra_headers ? extra_headers : "",
 330                          mime_boundary_leader, opt->mime_boundary,
 331                          mime_boundary_leader, opt->mime_boundary);
 332                 extra_headers = subject_buffer;
 333
 334                 if (opt->numbered_files)
 335                         strbuf_addf(&filename, "%d", opt->nr);
 336                 else
 337                         fmt_output_commit(&filename, commit, opt);
 338                 snprintf(buffer, sizeof(buffer) - 1,
 339                          "\n--%s%s\n"
 340                          "Content-Type: text/x-patch;"
 341                          " name=\"%s\"\n"
 342                          "Content-Transfer-Encoding: 8bit\n"
 343                          "Content-Disposition: %s;"
 344                          " filename=\"%s\"\n\n",
 345                          mime_boundary_leader, opt->mime_boundary,
 346                          filename.buf,
 347                          opt->no_inline ? "attachment" : "inline",
 348                          filename.buf);
 349                 opt->diffopt.stat_sep = buffer;
 350                 strbuf_release(&filename);
 351         }
 352         *subject_p = subject;
 353         *extra_headers_p = extra_headers;
 354 }
 355
 356 static void show_sig_lines(struct rev_info *opt, int status, const char *bol)
 357 {
 358         const char *color, *reset, *eol;
 359
 360         color = diff_get_color_opt(&opt->diffopt,
 361                                    status ? DIFF_WHITESPACE : DIFF_FRAGINFO);
 362         reset = diff_get_color_opt(&opt->diffopt, DIFF_RESET);
 363         while (*bol) {
 364                 eol = strchrnul(bol, '\n');
 365                 printf("%s%.*s%s%s", color, (int)(eol - bol), bol, reset,
 366                        *eol ? "\n" : "");
 367                 graph_show_oneline(opt->graph);
 368                 bol = (*eol) ? (eol + 1) : eol;
 369         }
 370 }
 371
 372 static void show_signature(struct rev_info *opt, struct commit *commit)
 373 {
 374         struct strbuf payload = STRBUF_INIT;
 375         struct strbuf signature = STRBUF_INIT;
 376         struct strbuf gpg_output = STRBUF_INIT;
 377         int status;
 378
 379         if (parse_signed_commit(commit, &payload, &signature) <= 0)
 380                 goto out;
 381
 382         status = verify_signed_buffer(payload.buf, payload.len,
 383                                       signature.buf, signature.len,
 384                                       &gpg_output, NULL);
 385         if (status && !gpg_output.len)
 386                 strbuf_addstr(&gpg_output, "No signature\n");
 387
 388         show_sig_lines(opt, status, gpg_output.buf);
 389
 390  out:
 391         strbuf_release(&gpg_output);
 392         strbuf_release(&payload);
 393         strbuf_release(&signature);
 394 }
 395
 396 static int which_parent(const unsigned char *sha1, const struct commit *commit)
 397 {
 398         int nth;
 399         const struct commit_list *parent;
 400
 401         for (nth = 0, parent = commit->parents; parent; parent = parent->next) {
 402                 if (!hashcmp(parent->item->object.sha1, sha1))
 403                         return nth;
 404                 nth++;
 405         }
 406         return -1;
 407 }
 408
 409 static int is_common_merge(const struct commit *commit)
 410 {
 411         return (commit->parents
 412                 && commit->parents->next
 413                 && !commit->parents->next->next);
 414 }
 415
 416 static void show_one_mergetag(struct commit *commit,
 417                               struct commit_extra_header *extra,
 418                               void *data)
 419 {
 420         struct rev_info *opt = (struct rev_info *)data;
 421         unsigned char sha1[20];
 422         struct tag *tag;
 423         struct strbuf verify_message;
 424         int status, nth;
 425         size_t payload_size, gpg_message_offset;
 426
 427         hash_sha1_file(extra->value, extra->len, typename(OBJ_TAG), sha1);
 428         tag = lookup_tag(sha1);
 429         if (!tag)
 430                 return; /* error message already given */
 431
 432         strbuf_init(&verify_message, 256);
 433         if (parse_tag_buffer(tag, extra->value, extra->len))
 434                 strbuf_addstr(&verify_message, "malformed mergetag\n");
 435         else if (is_common_merge(commit) &&
 436                  !hashcmp(tag->tagged->sha1,
 437                           commit->parents->next->item->object.sha1))
 438                 strbuf_addf(&verify_message,
 439                             "merged tag '%s'\n", tag->tag);
 440         else if ((nth = which_parent(tag->tagged->sha1, commit)) < 0)
 441                 strbuf_addf(&verify_message, "tag %s names a non-parent %s\n",
 442                                     tag->tag, tag->tagged->sha1);
 443         else
 444                 strbuf_addf(&verify_message,
 445                             "parent #%d, tagged '%s'\n", nth + 1, tag->tag);
 446         gpg_message_offset = verify_message.len;
 447
 448         payload_size = parse_signature(extra->value, extra->len);
 449         status = -1;
 450         if (extra->len > payload_size) {
 451                 /* could have a good signature */
 452                 if (!verify_signed_buffer(extra->value, payload_size,
 453                                           extra->value + payload_size,
 454                                           extra->len - payload_size,
 455                                           &verify_message, NULL))
 456                         status = 0; /* good */
 457                 else if (verify_message.len <= gpg_message_offset)
 458                         strbuf_addstr(&verify_message, "No signature\n");
 459                 /* otherwise we couldn't verify, which is shown as bad */
 460         }
 461
 462         show_sig_lines(opt, status, verify_message.buf);
 463         strbuf_release(&verify_message);
 464 }
 465
 466 static void show_mergetag(struct rev_info *opt, struct commit *commit)
 467 {
 468         for_each_mergetag(show_one_mergetag, commit, opt);
 469 }
 470
 471 void show_log(struct rev_info *opt)
 472 {
 473         struct strbuf msgbuf = STRBUF_INIT;
 474         struct log_info *log = opt->loginfo;
 475         struct commit *commit = log->commit, *parent = log->parent;
 476         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 477         const char *extra_headers = opt->extra_headers;
 478         struct pretty_print_context ctx = {0};
 479
 480         opt->loginfo = NULL;
 481         if (!opt->verbose_header) {
 482                 graph_show_commit(opt->graph);
 483
 484                 if (!opt->graph)
 485                         put_revision_mark(opt, commit);
 486                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 487                 if (opt->print_parents)
 488                         show_parents(commit, abbrev_commit);
 489                 if (opt->children.name)
 490                         show_children(opt, commit, abbrev_commit);
 491                 show_decorations(opt, commit);
 492                 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
 493                         putchar('\n');
 494                         graph_show_remainder(opt->graph);
 495                 }
 496                 putchar(opt->diffopt.line_termination);
 497                 return;
 498         }
 499
 500         /*
 501          * If use_terminator is set, we already handled any record termination
 502          * at the end of the last record.
 503          * Otherwise, add a diffopt.line_termination character before all
 504          * entries but the first.  (IOW, as a separator between entries)
 505          */
 506         if (opt->shown_one && !opt->use_terminator) {
 507                 /*
 508                  * If entries are separated by a newline, the output
 509                  * should look human-readable.  If the last entry ended
 510                  * with a newline, print the graph output before this
 511                  * newline.  Otherwise it will end up as a completely blank
 512                  * line and will look like a gap in the graph.
 513                  *
 514                  * If the entry separator is not a newline, the output is
 515                  * primarily intended for programmatic consumption, and we
 516                  * never want the extra graph output before the entry
 517                  * separator.
 518                  */
 519                 if (opt->diffopt.line_termination == '\n' &&
 520                     !opt->missing_newline)
 521                         graph_show_padding(opt->graph);
 522                 putchar(opt->diffopt.line_termination);
 523         }
 524         opt->shown_one = 1;
 525
 526         /*
 527          * If the history graph was requested,
 528          * print the graph, up to this commit's line
 529          */
 530         graph_show_commit(opt->graph);
 531
 532         /*
 533          * Print header line of header..
 534          */
 535
 536         if (opt->commit_format == CMIT_FMT_EMAIL) {
 537                 log_write_email_headers(opt, commit, &ctx.subject, &extra_headers,
 538                                         &ctx.need_8bit_cte);
 539         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 540                 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
 541                 if (opt->commit_format != CMIT_FMT_ONELINE)
 542                         fputs("commit ", stdout);
 543
 544                 if (!opt->graph)
 545                         put_revision_mark(opt, commit);
 546                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
 547                       stdout);
 548                 if (opt->print_parents)
 549                         show_parents(commit, abbrev_commit);
 550                 if (opt->children.name)
 551                         show_children(opt, commit, abbrev_commit);
 552                 if (parent)
 553                         printf(" (from %s)",
 554                                find_unique_abbrev(parent->object.sha1,
 555                                                   abbrev_commit));
 556                 fputs(diff_get_color_opt(&opt->diffopt, DIFF_RESET), stdout);
 557                 show_decorations(opt, commit);
 558                 if (opt->commit_format == CMIT_FMT_ONELINE) {
 559                         putchar(' ');
 560                 } else {
 561                         putchar('\n');
 562                         graph_show_oneline(opt->graph);
 563                 }
 564                 if (opt->reflog_info) {
 565                         /*
 566                          * setup_revisions() ensures that opt->reflog_info
 567                          * and opt->graph cannot both be set,
 568                          * so we don't need to worry about printing the
 569                          * graph info here.
 570                          */
 571                         show_reflog_message(opt->reflog_info,
 572                                             opt->commit_format == CMIT_FMT_ONELINE,
 573                                             opt->date_mode,
 574                                             opt->date_mode_explicit);
 575                         if (opt->commit_format == CMIT_FMT_ONELINE)
 576                                 return;
 577                 }
 578         }
 579
 580         if (opt->show_signature) {
 581                 show_signature(opt, commit);
 582                 show_mergetag(opt, commit);
 583         }
 584
 585         if (!get_cached_commit_buffer(commit, NULL))
 586                 return;
 587
 588         if (opt->show_notes) {
 589                 int raw;
 590                 struct strbuf notebuf = STRBUF_INIT;
 591
 592                 raw = (opt->commit_format == CMIT_FMT_USERFORMAT);
 593                 format_display_notes(commit->object.sha1, &notebuf,
 594                                      get_log_output_encoding(), raw);
 595                 ctx.notes_message = notebuf.len
 596                         ? strbuf_detach(&notebuf, NULL)
 597                         : xcalloc(1, 1);
 598         }
 599
 600         /*
 601          * And then the pretty-printed message itself
 602          */
 603         if (ctx.need_8bit_cte >= 0 && opt->add_signoff)
 604                 ctx.need_8bit_cte =
 605                         has_non_ascii(fmt_name(getenv("GIT_COMMITTER_NAME"),
 606                                                getenv("GIT_COMMITTER_EMAIL")));
 607         ctx.date_mode = opt->date_mode;
 608         ctx.date_mode_explicit = opt->date_mode_explicit;
 609         ctx.abbrev = opt->diffopt.abbrev;
 610         ctx.after_subject = extra_headers;
 611         ctx.preserve_subject = opt->preserve_subject;
 612         ctx.reflog_info = opt->reflog_info;
 613         ctx.fmt = opt->commit_format;
 614         ctx.mailmap = opt->mailmap;
 615         ctx.color = opt->diffopt.use_color;
 616         ctx.output_encoding = get_log_output_encoding();
 617         if (opt->from_ident.mail_begin && opt->from_ident.name_begin)
 618                 ctx.from_ident = &opt->from_ident;
 619         pretty_print_commit(&ctx, commit, &msgbuf);
 620
 621         if (opt->add_signoff)
 622                 append_signoff(&msgbuf, 0, APPEND_SIGNOFF_DEDUP);
 623
 624         if ((ctx.fmt != CMIT_FMT_USERFORMAT) &&
 625             ctx.notes_message && *ctx.notes_message) {
 626                 if (ctx.fmt == CMIT_FMT_EMAIL) {
 627                         strbuf_addstr(&msgbuf, "---\n");
 628                         opt->shown_dashes = 1;
 629                 }
 630                 strbuf_addstr(&msgbuf, ctx.notes_message);
 631         }
 632
 633         if (opt->show_log_size) {
 634                 printf("log size %i\n", (int)msgbuf.len);
 635                 graph_show_oneline(opt->graph);
 636         }
 637
 638         /*
 639          * Set opt->missing_newline if msgbuf doesn't
 640          * end in a newline (including if it is empty)
 641          */
 642         if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
 643                 opt->missing_newline = 1;
 644         else
 645                 opt->missing_newline = 0;
 646
 647         if (opt->graph)
 648                 graph_show_commit_msg(opt->graph, &msgbuf);
 649         else
 650                 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
 651         if (opt->use_terminator && !commit_format_is_empty(opt->commit_format)) {
 652                 if (!opt->missing_newline)
 653                         graph_show_padding(opt->graph);
 654                 putchar(opt->diffopt.line_termination);
 655         }
 656
 657         strbuf_release(&msgbuf);
 658         free(ctx.notes_message);
 659 }
 660
 661 int log_tree_diff_flush(struct rev_info *opt)
 662 {
 663         opt->shown_dashes = 0;
 664         diffcore_std(&opt->diffopt);
 665
 666         if (diff_queue_is_empty()) {
 667                 int saved_fmt = opt->diffopt.output_format;
 668                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 669                 diff_flush(&opt->diffopt);
 670                 opt->diffopt.output_format = saved_fmt;
 671                 return 0;
 672         }
 673
 674         if (opt->loginfo && !opt->no_commit_id) {
 675                 show_log(opt);
 676                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 677                     opt->verbose_header &&
 678                     opt->commit_format != CMIT_FMT_ONELINE &&
 679                     !commit_format_is_empty(opt->commit_format)) {
 680                         /*
 681                          * When showing a verbose header (i.e. log message),
 682                          * and not in --pretty=oneline format, we would want
 683                          * an extra newline between the end of log and the
 684                          * diff/diffstat output for readability.
 685                          */
 686                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 687                         if (opt->diffopt.output_prefix) {
 688                                 struct strbuf *msg = NULL;
 689                                 msg = opt->diffopt.output_prefix(&opt->diffopt,
 690                                         opt->diffopt.output_prefix_data);
 691                                 fwrite(msg->buf, msg->len, 1, stdout);
 692                         }
 693
 694                         /*
 695                          * We may have shown three-dashes line early
 696                          * between notes and the log message, in which
 697                          * case we only want a blank line after the
 698                          * notes without (an extra) three-dashes line.
 699                          * Otherwise, we show the three-dashes line if
 700                          * we are showing the patch with diffstat, but
 701                          * in that case, there is no extra blank line
 702                          * after the three-dashes line.
 703                          */
 704                         if (!opt->shown_dashes &&
 705                             (pch & opt->diffopt.output_format) == pch)
 706                                 printf("---");
 707                         putchar('\n');
 708                 }
 709         }
 710         diff_flush(&opt->diffopt);
 711         return 1;
 712 }
 713
 714 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 715 {
 716         diff_tree_combined_merge(commit, opt->dense_combined_merges, opt);
 717         return !opt->loginfo;
 718 }
 719
 720 /*
 721  * Show the diff of a commit.
 722  *
 723  * Return true if we printed any log info messages
 724  */
 725 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 726 {
 727         int showed_log;
 728         struct commit_list *parents;
 729         unsigned const char *sha1;
 730
 731         if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
 732                 return 0;
 733
 734         parse_commit_or_die(commit);
 735         sha1 = commit->tree->object.sha1;
 736
 737         /* Root commit? */
 738         parents = get_saved_parents(opt, commit);
 739         if (!parents) {
 740                 if (opt->show_root_diff) {
 741                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 742                         log_tree_diff_flush(opt);
 743                 }
 744                 return !opt->loginfo;
 745         }
 746
 747         /* More than one parent? */
 748         if (parents && parents->next) {
 749                 if (opt->ignore_merges)
 750                         return 0;
 751                 else if (opt->combine_merges)
 752                         return do_diff_combined(opt, commit);
 753                 else if (opt->first_parent_only) {
 754                         /*
 755                          * Generate merge log entry only for the first
 756                          * parent, showing summary diff of the others
 757                          * we merged _in_.
 758                          */
 759                         parse_commit_or_die(parents->item);
 760                         diff_tree_sha1(parents->item->tree->object.sha1,
 761                                        sha1, "", &opt->diffopt);
 762                         log_tree_diff_flush(opt);
 763                         return !opt->loginfo;
 764                 }
 765
 766                 /* If we show individual diffs, show the parent info */
 767                 log->parent = parents->item;
 768         }
 769
 770         showed_log = 0;
 771         for (;;) {
 772                 struct commit *parent = parents->item;
 773
 774                 parse_commit_or_die(parent);
 775                 diff_tree_sha1(parent->tree->object.sha1,
 776                                sha1, "", &opt->diffopt);
 777                 log_tree_diff_flush(opt);
 778
 779                 showed_log |= !opt->loginfo;
 780
 781                 /* Set up the log info for the next parent, if any.. */
 782                 parents = parents->next;
 783                 if (!parents)
 784                         break;
 785                 log->parent = parents->item;
 786                 opt->loginfo = log;
 787         }
 788         return showed_log;
 789 }
 790
 791 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 792 {
 793         struct log_info log;
 794         int shown;
 795
 796         log.commit = commit;
 797         log.parent = NULL;
 798         opt->loginfo = &log;
 799
 800         if (opt->line_level_traverse)
 801                 return line_log_print(opt, commit);
 802
 803         if (opt->track_linear && !opt->linear && !opt->reverse_output_stage)
 804                 printf("\n%s\n", opt->break_bar);
 805         shown = log_tree_diff(opt, commit, &log);
 806         if (!shown && opt->loginfo && opt->always_show_header) {
 807                 log.parent = NULL;
 808                 show_log(opt);
 809                 shown = 1;
 810         }
 811         if (opt->track_linear && !opt->linear && opt->reverse_output_stage)
 812                 printf("\n%s\n", opt->break_bar);
 813         opt->loginfo = NULL;
 814         maybe_flush_or_die(stdout, "stdout");
 815         return shown;
 816 }