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
  11 struct decoration name_decoration = { "object names" };
  12
  13 static 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 }
  22
  23 static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
  24 {
  25         struct object *obj = parse_object(sha1);
  26         if (!obj)
  27                 return 0;
  28         if (!cb_data || *(int *)cb_data == DECORATE_SHORT_REFS)
  29                 refname = prettify_refname(refname);
  30         add_name_decoration("", refname, obj);
  31         while (obj->type == OBJ_TAG) {
  32                 obj = ((struct tag *)obj)->tagged;
  33                 if (!obj)
  34                         break;
  35                 add_name_decoration("tag: ", refname, obj);
  36         }
  37         return 0;
  38 }
  39
  40 void load_ref_decorations(int flags)
  41 {
  42         static int loaded;
  43         if (!loaded) {
  44                 loaded = 1;
  45                 for_each_ref(add_ref_decoration, &flags);
  46                 head_ref(add_ref_decoration, &flags);
  47         }
  48 }
  49
  50 static void show_parents(struct commit *commit, int abbrev)
  51 {
  52         struct commit_list *p;
  53         for (p = commit->parents; p ; p = p->next) {
  54                 struct commit *parent = p->item;
  55                 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
  56         }
  57 }
  58
  59 void show_decorations(struct rev_info *opt, struct commit *commit)
  60 {
  61         const char *prefix;
  62         struct name_decoration *decoration;
  63
  64         if (opt->show_source && commit->util)
  65                 printf("\t%s", (char *) commit->util);
  66         if (!opt->show_decorations)
  67                 return;
  68         decoration = lookup_decoration(&name_decoration, &commit->object);
  69         if (!decoration)
  70                 return;
  71         prefix = " (";
  72         while (decoration) {
  73                 printf("%s%s", prefix, decoration->name);
  74                 prefix = ", ";
  75                 decoration = decoration->next;
  76         }
  77         putchar(')');
  78 }
  79
  80 /*
  81  * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
  82  * Signed-off-by: and Acked-by: lines.
  83  */
  84 static int detect_any_signoff(char *letter, int size)
  85 {
  86         char *cp;
  87         int seen_colon = 0;
  88         int seen_at = 0;
  89         int seen_name = 0;
  90         int seen_head = 0;
  91
  92         cp = letter + size;
  93         while (letter <= --cp && *cp == '\n')
  94                 continue;
  95
  96         while (letter <= cp) {
  97                 char ch = *cp--;
  98                 if (ch == '\n')
  99                         break;
 100
 101                 if (!seen_at) {
 102                         if (ch == '@')
 103                                 seen_at = 1;
 104                         continue;
 105                 }
 106                 if (!seen_colon) {
 107                         if (ch == '@')
 108                                 return 0;
 109                         else if (ch == ':')
 110                                 seen_colon = 1;
 111                         else
 112                                 seen_name = 1;
 113                         continue;
 114                 }
 115                 if (('A' <= ch && ch <= 'Z') ||
 116                     ('a' <= ch && ch <= 'z') ||
 117                     ch == '-') {
 118                         seen_head = 1;
 119                         continue;
 120                 }
 121                 /* no empty last line doesn't match */
 122                 return 0;
 123         }
 124         return seen_head && seen_name;
 125 }
 126
 127 static void append_signoff(struct strbuf *sb, const char *signoff)
 128 {
 129         static const char signed_off_by[] = "Signed-off-by: ";
 130         size_t signoff_len = strlen(signoff);
 131         int has_signoff = 0;
 132         char *cp;
 133
 134         cp = sb->buf;
 135
 136         /* First see if we already have the sign-off by the signer */
 137         while ((cp = strstr(cp, signed_off_by))) {
 138
 139                 has_signoff = 1;
 140
 141                 cp += strlen(signed_off_by);
 142                 if (cp + signoff_len >= sb->buf + sb->len)
 143                         break;
 144                 if (strncmp(cp, signoff, signoff_len))
 145                         continue;
 146                 if (!isspace(cp[signoff_len]))
 147                         continue;
 148                 /* we already have him */
 149                 return;
 150         }
 151
 152         if (!has_signoff)
 153                 has_signoff = detect_any_signoff(sb->buf, sb->len);
 154
 155         if (!has_signoff)
 156                 strbuf_addch(sb, '\n');
 157
 158         strbuf_addstr(sb, signed_off_by);
 159         strbuf_add(sb, signoff, signoff_len);
 160         strbuf_addch(sb, '\n');
 161 }
 162
 163 static unsigned int digits_in_number(unsigned int number)
 164 {
 165         unsigned int i = 10, result = 1;
 166         while (i <= number) {
 167                 i *= 10;
 168                 result++;
 169         }
 170         return result;
 171 }
 172
 173 void get_patch_filename(struct commit *commit, int nr, const char *suffix,
 174                         struct strbuf *buf)
 175 {
 176         int suffix_len = strlen(suffix) + 1;
 177         int start_len = buf->len;
 178
 179         strbuf_addf(buf, commit ? "%04d-" : "%d", nr);
 180         if (commit) {
 181                 int max_len = start_len + FORMAT_PATCH_NAME_MAX - suffix_len;
 182                 struct pretty_print_context ctx = {0};
 183                 ctx.date_mode = DATE_NORMAL;
 184
 185                 format_commit_message(commit, "%f", buf, &ctx);
 186                 if (max_len < buf->len)
 187                         strbuf_setlen(buf, max_len);
 188                 strbuf_addstr(buf, suffix);
 189         }
 190 }
 191
 192 void log_write_email_headers(struct rev_info *opt, struct commit *commit,
 193                              const char **subject_p,
 194                              const char **extra_headers_p,
 195                              int *need_8bit_cte_p)
 196 {
 197         const char *subject = NULL;
 198         const char *extra_headers = opt->extra_headers;
 199         const char *name = sha1_to_hex(commit->object.sha1);
 200
 201         *need_8bit_cte_p = 0; /* unknown */
 202         if (opt->total > 0) {
 203                 static char buffer[64];
 204                 snprintf(buffer, sizeof(buffer),
 205                          "Subject: [%s %0*d/%d] ",
 206                          opt->subject_prefix,
 207                          digits_in_number(opt->total),
 208                          opt->nr, opt->total);
 209                 subject = buffer;
 210         } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 211                 static char buffer[256];
 212                 snprintf(buffer, sizeof(buffer),
 213                          "Subject: [%s] ",
 214                          opt->subject_prefix);
 215                 subject = buffer;
 216         } else {
 217                 subject = "Subject: ";
 218         }
 219
 220         printf("From %s Mon Sep 17 00:00:00 2001\n", name);
 221         graph_show_oneline(opt->graph);
 222         if (opt->message_id) {
 223                 printf("Message-Id: <%s>\n", opt->message_id);
 224                 graph_show_oneline(opt->graph);
 225         }
 226         if (opt->ref_message_ids && opt->ref_message_ids->nr > 0) {
 227                 int i, n;
 228                 n = opt->ref_message_ids->nr;
 229                 printf("In-Reply-To: <%s>\n", opt->ref_message_ids->items[n-1].string);
 230                 for (i = 0; i < n; i++)
 231                         printf("%s<%s>\n", (i > 0 ? "\t" : "References: "),
 232                                opt->ref_message_ids->items[i].string);
 233                 graph_show_oneline(opt->graph);
 234         }
 235         if (opt->mime_boundary) {
 236                 static char subject_buffer[1024];
 237                 static char buffer[1024];
 238                 struct strbuf filename =  STRBUF_INIT;
 239                 *need_8bit_cte_p = -1; /* NEVER */
 240                 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 241                          "%s"
 242                          "MIME-Version: 1.0\n"
 243                          "Content-Type: multipart/mixed;"
 244                          " boundary=\"%s%s\"\n"
 245                          "\n"
 246                          "This is a multi-part message in MIME "
 247                          "format.\n"
 248                          "--%s%s\n"
 249                          "Content-Type: text/plain; "
 250                          "charset=UTF-8; format=fixed\n"
 251                          "Content-Transfer-Encoding: 8bit\n\n",
 252                          extra_headers ? extra_headers : "",
 253                          mime_boundary_leader, opt->mime_boundary,
 254                          mime_boundary_leader, opt->mime_boundary);
 255                 extra_headers = subject_buffer;
 256
 257                 get_patch_filename(opt->numbered_files ? NULL : commit, opt->nr,
 258                                     opt->patch_suffix, &filename);
 259                 snprintf(buffer, sizeof(buffer) - 1,
 260                          "\n--%s%s\n"
 261                          "Content-Type: text/x-patch;"
 262                          " name=\"%s\"\n"
 263                          "Content-Transfer-Encoding: 8bit\n"
 264                          "Content-Disposition: %s;"
 265                          " filename=\"%s\"\n\n",
 266                          mime_boundary_leader, opt->mime_boundary,
 267                          filename.buf,
 268                          opt->no_inline ? "attachment" : "inline",
 269                          filename.buf);
 270                 opt->diffopt.stat_sep = buffer;
 271                 strbuf_release(&filename);
 272         }
 273         *subject_p = subject;
 274         *extra_headers_p = extra_headers;
 275 }
 276
 277 void show_log(struct rev_info *opt)
 278 {
 279         struct strbuf msgbuf = STRBUF_INIT;
 280         struct log_info *log = opt->loginfo;
 281         struct commit *commit = log->commit, *parent = log->parent;
 282         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 283         const char *extra_headers = opt->extra_headers;
 284         struct pretty_print_context ctx = {0};
 285
 286         opt->loginfo = NULL;
 287         if (!opt->verbose_header) {
 288                 graph_show_commit(opt->graph);
 289
 290                 if (!opt->graph) {
 291                         if (commit->object.flags & BOUNDARY)
 292                                 putchar('-');
 293                         else if (commit->object.flags & UNINTERESTING)
 294                                 putchar('^');
 295                         else if (opt->left_right) {
 296                                 if (commit->object.flags & SYMMETRIC_LEFT)
 297                                         putchar('<');
 298                                 else
 299                                         putchar('>');
 300                         }
 301                 }
 302                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 303                 if (opt->print_parents)
 304                         show_parents(commit, abbrev_commit);
 305                 show_decorations(opt, commit);
 306                 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
 307                         putchar('\n');
 308                         graph_show_remainder(opt->graph);
 309                 }
 310                 putchar(opt->diffopt.line_termination);
 311                 return;
 312         }
 313
 314         /*
 315          * If use_terminator is set, we already handled any record termination
 316          * at the end of the last record.
 317          * Otherwise, add a diffopt.line_termination character before all
 318          * entries but the first.  (IOW, as a separator between entries)
 319          */
 320         if (opt->shown_one && !opt->use_terminator) {
 321                 /*
 322                  * If entries are separated by a newline, the output
 323                  * should look human-readable.  If the last entry ended
 324                  * with a newline, print the graph output before this
 325                  * newline.  Otherwise it will end up as a completely blank
 326                  * line and will look like a gap in the graph.
 327                  *
 328                  * If the entry separator is not a newline, the output is
 329                  * primarily intended for programmatic consumption, and we
 330                  * never want the extra graph output before the entry
 331                  * separator.
 332                  */
 333                 if (opt->diffopt.line_termination == '\n' &&
 334                     !opt->missing_newline)
 335                         graph_show_padding(opt->graph);
 336                 putchar(opt->diffopt.line_termination);
 337         }
 338         opt->shown_one = 1;
 339
 340         /*
 341          * If the history graph was requested,
 342          * print the graph, up to this commit's line
 343          */
 344         graph_show_commit(opt->graph);
 345
 346         /*
 347          * Print header line of header..
 348          */
 349
 350         if (opt->commit_format == CMIT_FMT_EMAIL) {
 351                 log_write_email_headers(opt, commit, &ctx.subject, &extra_headers,
 352                                         &ctx.need_8bit_cte);
 353         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 354                 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
 355                 if (opt->commit_format != CMIT_FMT_ONELINE)
 356                         fputs("commit ", stdout);
 357
 358                 if (!opt->graph) {
 359                         if (commit->object.flags & BOUNDARY)
 360                                 putchar('-');
 361                         else if (commit->object.flags & UNINTERESTING)
 362                                 putchar('^');
 363                         else if (opt->left_right) {
 364                                 if (commit->object.flags & SYMMETRIC_LEFT)
 365                                         putchar('<');
 366                                 else
 367                                         putchar('>');
 368                         }
 369                 }
 370                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
 371                       stdout);
 372                 if (opt->print_parents)
 373                         show_parents(commit, abbrev_commit);
 374                 if (parent)
 375                         printf(" (from %s)",
 376                                find_unique_abbrev(parent->object.sha1,
 377                                                   abbrev_commit));
 378                 show_decorations(opt, commit);
 379                 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
 380                 if (opt->commit_format == CMIT_FMT_ONELINE) {
 381                         putchar(' ');
 382                 } else {
 383                         putchar('\n');
 384                         graph_show_oneline(opt->graph);
 385                 }
 386                 if (opt->reflog_info) {
 387                         /*
 388                          * setup_revisions() ensures that opt->reflog_info
 389                          * and opt->graph cannot both be set,
 390                          * so we don't need to worry about printing the
 391                          * graph info here.
 392                          */
 393                         show_reflog_message(opt->reflog_info,
 394                                     opt->commit_format == CMIT_FMT_ONELINE,
 395                                     opt->date_mode_explicit ?
 396                                         opt->date_mode :
 397                                         DATE_NORMAL);
 398                         if (opt->commit_format == CMIT_FMT_ONELINE)
 399                                 return;
 400                 }
 401         }
 402
 403         if (!commit->buffer)
 404                 return;
 405
 406         /*
 407          * And then the pretty-printed message itself
 408          */
 409         if (ctx.need_8bit_cte >= 0)
 410                 ctx.need_8bit_cte = has_non_ascii(opt->add_signoff);
 411         ctx.date_mode = opt->date_mode;
 412         ctx.abbrev = opt->diffopt.abbrev;
 413         ctx.after_subject = extra_headers;
 414         ctx.reflog_info = opt->reflog_info;
 415         pretty_print_commit(opt->commit_format, commit, &msgbuf, &ctx);
 416
 417         if (opt->add_signoff)
 418                 append_signoff(&msgbuf, opt->add_signoff);
 419         if (opt->show_log_size) {
 420                 printf("log size %i\n", (int)msgbuf.len);
 421                 graph_show_oneline(opt->graph);
 422         }
 423
 424         /*
 425          * Set opt->missing_newline if msgbuf doesn't
 426          * end in a newline (including if it is empty)
 427          */
 428         if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
 429                 opt->missing_newline = 1;
 430         else
 431                 opt->missing_newline = 0;
 432
 433         if (opt->graph)
 434                 graph_show_commit_msg(opt->graph, &msgbuf);
 435         else
 436                 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
 437         if (opt->use_terminator) {
 438                 if (!opt->missing_newline)
 439                         graph_show_padding(opt->graph);
 440                 putchar('\n');
 441         }
 442
 443         strbuf_release(&msgbuf);
 444 }
 445
 446 int log_tree_diff_flush(struct rev_info *opt)
 447 {
 448         diffcore_std(&opt->diffopt);
 449
 450         if (diff_queue_is_empty()) {
 451                 int saved_fmt = opt->diffopt.output_format;
 452                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 453                 diff_flush(&opt->diffopt);
 454                 opt->diffopt.output_format = saved_fmt;
 455                 return 0;
 456         }
 457
 458         if (opt->loginfo && !opt->no_commit_id) {
 459                 /* When showing a verbose header (i.e. log message),
 460                  * and not in --pretty=oneline format, we would want
 461                  * an extra newline between the end of log and the
 462                  * output for readability.
 463                  */
 464                 show_log(opt);
 465                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 466                     opt->verbose_header &&
 467                     opt->commit_format != CMIT_FMT_ONELINE) {
 468                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 469                         if ((pch & opt->diffopt.output_format) == pch)
 470                                 printf("---");
 471                         putchar('\n');
 472                 }
 473         }
 474         diff_flush(&opt->diffopt);
 475         return 1;
 476 }
 477
 478 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 479 {
 480         unsigned const char *sha1 = commit->object.sha1;
 481
 482         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 483         return !opt->loginfo;
 484 }
 485
 486 /*
 487  * Show the diff of a commit.
 488  *
 489  * Return true if we printed any log info messages
 490  */
 491 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 492 {
 493         int showed_log;
 494         struct commit_list *parents;
 495         unsigned const char *sha1 = commit->object.sha1;
 496
 497         if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
 498                 return 0;
 499
 500         /* Root commit? */
 501         parents = commit->parents;
 502         if (!parents) {
 503                 if (opt->show_root_diff) {
 504                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 505                         log_tree_diff_flush(opt);
 506                 }
 507                 return !opt->loginfo;
 508         }
 509
 510         /* More than one parent? */
 511         if (parents && parents->next) {
 512                 if (opt->ignore_merges)
 513                         return 0;
 514                 else if (opt->combine_merges)
 515                         return do_diff_combined(opt, commit);
 516
 517                 /* If we show individual diffs, show the parent info */
 518                 log->parent = parents->item;
 519         }
 520
 521         showed_log = 0;
 522         for (;;) {
 523                 struct commit *parent = parents->item;
 524
 525                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 526                 log_tree_diff_flush(opt);
 527
 528                 showed_log |= !opt->loginfo;
 529
 530                 /* Set up the log info for the next parent, if any.. */
 531                 parents = parents->next;
 532                 if (!parents)
 533                         break;
 534                 log->parent = parents->item;
 535                 opt->loginfo = log;
 536         }
 537         return showed_log;
 538 }
 539
 540 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 541 {
 542         struct log_info log;
 543         int shown;
 544
 545         log.commit = commit;
 546         log.parent = NULL;
 547         opt->loginfo = &log;
 548
 549         shown = log_tree_diff(opt, commit, &log);
 550         if (!shown && opt->loginfo && opt->always_show_header) {
 551                 log.parent = NULL;
 552                 show_log(opt);
 553                 shown = 1;
 554         }
 555         opt->loginfo = NULL;
 556         maybe_flush_or_die(stdout, "stdout");
 557         return shown;
 558 }