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
  10 struct decoration name_decoration = { "object names" };
  11
  12 static void add_name_decoration(const char *prefix, const char *name, struct object *obj)
  13 {
  14         int plen = strlen(prefix);
  15         int nlen = strlen(name);
  16         struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + plen + nlen);
  17         memcpy(res->name, prefix, plen);
  18         memcpy(res->name + plen, name, nlen + 1);
  19         res->next = add_decoration(&name_decoration, obj, res);
  20 }
  21
  22 static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
  23 {
  24         struct object *obj = parse_object(sha1);
  25         if (!obj)
  26                 return 0;
  27         add_name_decoration("", refname, obj);
  28         while (obj->type == OBJ_TAG) {
  29                 obj = ((struct tag *)obj)->tagged;
  30                 if (!obj)
  31                         break;
  32                 add_name_decoration("tag: ", refname, obj);
  33         }
  34         return 0;
  35 }
  36
  37 void load_ref_decorations(void)
  38 {
  39         static int loaded;
  40         if (!loaded) {
  41                 loaded = 1;
  42                 for_each_ref(add_ref_decoration, NULL);
  43         }
  44 }
  45
  46 static void show_parents(struct commit *commit, int abbrev)
  47 {
  48         struct commit_list *p;
  49         for (p = commit->parents; p ; p = p->next) {
  50                 struct commit *parent = p->item;
  51                 printf(" %s", find_unique_abbrev(parent->object.sha1, abbrev));
  52         }
  53 }
  54
  55 void show_decorations(struct rev_info *opt, struct commit *commit)
  56 {
  57         const char *prefix;
  58         struct name_decoration *decoration;
  59
  60         if (opt->show_source && commit->util)
  61                 printf("\t%s", (char *) commit->util);
  62         if (!opt->show_decorations)
  63                 return;
  64         decoration = lookup_decoration(&name_decoration, &commit->object);
  65         if (!decoration)
  66                 return;
  67         prefix = " (";
  68         while (decoration) {
  69                 printf("%s%s", prefix, decoration->name);
  70                 prefix = ", ";
  71                 decoration = decoration->next;
  72         }
  73         putchar(')');
  74 }
  75
  76 /*
  77  * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
  78  * Signed-off-by: and Acked-by: lines.
  79  */
  80 static int detect_any_signoff(char *letter, int size)
  81 {
  82         char *cp;
  83         int seen_colon = 0;
  84         int seen_at = 0;
  85         int seen_name = 0;
  86         int seen_head = 0;
  87
  88         cp = letter + size;
  89         while (letter <= --cp && *cp == '\n')
  90                 continue;
  91
  92         while (letter <= cp) {
  93                 char ch = *cp--;
  94                 if (ch == '\n')
  95                         break;
  96
  97                 if (!seen_at) {
  98                         if (ch == '@')
  99                                 seen_at = 1;
 100                         continue;
 101                 }
 102                 if (!seen_colon) {
 103                         if (ch == '@')
 104                                 return 0;
 105                         else if (ch == ':')
 106                                 seen_colon = 1;
 107                         else
 108                                 seen_name = 1;
 109                         continue;
 110                 }
 111                 if (('A' <= ch && ch <= 'Z') ||
 112                     ('a' <= ch && ch <= 'z') ||
 113                     ch == '-') {
 114                         seen_head = 1;
 115                         continue;
 116                 }
 117                 /* no empty last line doesn't match */
 118                 return 0;
 119         }
 120         return seen_head && seen_name;
 121 }
 122
 123 static void append_signoff(struct strbuf *sb, const char *signoff)
 124 {
 125         static const char signed_off_by[] = "Signed-off-by: ";
 126         size_t signoff_len = strlen(signoff);
 127         int has_signoff = 0;
 128         char *cp;
 129
 130         cp = sb->buf;
 131
 132         /* First see if we already have the sign-off by the signer */
 133         while ((cp = strstr(cp, signed_off_by))) {
 134
 135                 has_signoff = 1;
 136
 137                 cp += strlen(signed_off_by);
 138                 if (cp + signoff_len >= sb->buf + sb->len)
 139                         break;
 140                 if (strncmp(cp, signoff, signoff_len))
 141                         continue;
 142                 if (!isspace(cp[signoff_len]))
 143                         continue;
 144                 /* we already have him */
 145                 return;
 146         }
 147
 148         if (!has_signoff)
 149                 has_signoff = detect_any_signoff(sb->buf, sb->len);
 150
 151         if (!has_signoff)
 152                 strbuf_addch(sb, '\n');
 153
 154         strbuf_addstr(sb, signed_off_by);
 155         strbuf_add(sb, signoff, signoff_len);
 156         strbuf_addch(sb, '\n');
 157 }
 158
 159 static unsigned int digits_in_number(unsigned int number)
 160 {
 161         unsigned int i = 10, result = 1;
 162         while (i <= number) {
 163                 i *= 10;
 164                 result++;
 165         }
 166         return result;
 167 }
 168
 169 static int has_non_ascii(const char *s)
 170 {
 171         int ch;
 172         if (!s)
 173                 return 0;
 174         while ((ch = *s++) != '\0') {
 175                 if (non_ascii(ch))
 176                         return 1;
 177         }
 178         return 0;
 179 }
 180
 181 void log_write_email_headers(struct rev_info *opt, const char *name,
 182                              const char **subject_p,
 183                              const char **extra_headers_p,
 184                              int *need_8bit_cte_p)
 185 {
 186         const char *subject = NULL;
 187         const char *extra_headers = opt->extra_headers;
 188
 189         *need_8bit_cte_p = 0; /* unknown */
 190         if (opt->total > 0) {
 191                 static char buffer[64];
 192                 snprintf(buffer, sizeof(buffer),
 193                          "Subject: [%s %0*d/%d] ",
 194                          opt->subject_prefix,
 195                          digits_in_number(opt->total),
 196                          opt->nr, opt->total);
 197                 subject = buffer;
 198         } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 199                 static char buffer[256];
 200                 snprintf(buffer, sizeof(buffer),
 201                          "Subject: [%s] ",
 202                          opt->subject_prefix);
 203                 subject = buffer;
 204         } else {
 205                 subject = "Subject: ";
 206         }
 207
 208         printf("From %s Mon Sep 17 00:00:00 2001\n", name);
 209         graph_show_oneline(opt->graph);
 210         if (opt->message_id) {
 211                 printf("Message-Id: <%s>\n", opt->message_id);
 212                 graph_show_oneline(opt->graph);
 213         }
 214         if (opt->ref_message_id) {
 215                 printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 216                        opt->ref_message_id, opt->ref_message_id);
 217                 graph_show_oneline(opt->graph);
 218         }
 219         if (opt->mime_boundary) {
 220                 static char subject_buffer[1024];
 221                 static char buffer[1024];
 222                 *need_8bit_cte_p = -1; /* NEVER */
 223                 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 224                          "%s"
 225                          "MIME-Version: 1.0\n"
 226                          "Content-Type: multipart/mixed;"
 227                          " boundary=\"%s%s\"\n"
 228                          "\n"
 229                          "This is a multi-part message in MIME "
 230                          "format.\n"
 231                          "--%s%s\n"
 232                          "Content-Type: text/plain; "
 233                          "charset=UTF-8; format=fixed\n"
 234                          "Content-Transfer-Encoding: 8bit\n\n",
 235                          extra_headers ? extra_headers : "",
 236                          mime_boundary_leader, opt->mime_boundary,
 237                          mime_boundary_leader, opt->mime_boundary);
 238                 extra_headers = subject_buffer;
 239
 240                 snprintf(buffer, sizeof(buffer) - 1,
 241                          "\n--%s%s\n"
 242                          "Content-Type: text/x-patch;"
 243                          " name=\"%s.diff\"\n"
 244                          "Content-Transfer-Encoding: 8bit\n"
 245                          "Content-Disposition: %s;"
 246                          " filename=\"%s.diff\"\n\n",
 247                          mime_boundary_leader, opt->mime_boundary,
 248                          name,
 249                          opt->no_inline ? "attachment" : "inline",
 250                          name);
 251                 opt->diffopt.stat_sep = buffer;
 252         }
 253         *subject_p = subject;
 254         *extra_headers_p = extra_headers;
 255 }
 256
 257 void show_log(struct rev_info *opt)
 258 {
 259         struct strbuf msgbuf = STRBUF_INIT;
 260         struct log_info *log = opt->loginfo;
 261         struct commit *commit = log->commit, *parent = log->parent;
 262         int abbrev = opt->diffopt.abbrev;
 263         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 264         const char *subject = NULL, *extra_headers = opt->extra_headers;
 265         int need_8bit_cte = 0;
 266
 267         opt->loginfo = NULL;
 268         if (!opt->verbose_header) {
 269                 graph_show_commit(opt->graph);
 270
 271                 if (!opt->graph) {
 272                         if (commit->object.flags & BOUNDARY)
 273                                 putchar('-');
 274                         else if (commit->object.flags & UNINTERESTING)
 275                                 putchar('^');
 276                         else if (opt->left_right) {
 277                                 if (commit->object.flags & SYMMETRIC_LEFT)
 278                                         putchar('<');
 279                                 else
 280                                         putchar('>');
 281                         }
 282                 }
 283                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 284                 if (opt->print_parents)
 285                         show_parents(commit, abbrev_commit);
 286                 show_decorations(opt, commit);
 287                 if (opt->graph && !graph_is_commit_finished(opt->graph)) {
 288                         putchar('\n');
 289                         graph_show_remainder(opt->graph);
 290                 }
 291                 putchar(opt->diffopt.line_termination);
 292                 return;
 293         }
 294
 295         /*
 296          * If use_terminator is set, add a newline at the end of the entry.
 297          * Otherwise, add a diffopt.line_termination character before all
 298          * entries but the first.  (IOW, as a separator between entries)
 299          */
 300         if (opt->shown_one && !opt->use_terminator) {
 301                 /*
 302                  * If entries are separated by a newline, the output
 303                  * should look human-readable.  If the last entry ended
 304                  * with a newline, print the graph output before this
 305                  * newline.  Otherwise it will end up as a completely blank
 306                  * line and will look like a gap in the graph.
 307                  *
 308                  * If the entry separator is not a newline, the output is
 309                  * primarily intended for programmatic consumption, and we
 310                  * never want the extra graph output before the entry
 311                  * separator.
 312                  */
 313                 if (opt->diffopt.line_termination == '\n' &&
 314                     !opt->missing_newline)
 315                         graph_show_padding(opt->graph);
 316                 putchar(opt->diffopt.line_termination);
 317         }
 318         opt->shown_one = 1;
 319
 320         /*
 321          * If the history graph was requested,
 322          * print the graph, up to this commit's line
 323          */
 324         graph_show_commit(opt->graph);
 325
 326         /*
 327          * Print header line of header..
 328          */
 329
 330         if (opt->commit_format == CMIT_FMT_EMAIL) {
 331                 log_write_email_headers(opt, sha1_to_hex(commit->object.sha1),
 332                                         &subject, &extra_headers,
 333                                         &need_8bit_cte);
 334         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 335                 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
 336                 if (opt->commit_format != CMIT_FMT_ONELINE)
 337                         fputs("commit ", stdout);
 338
 339                 if (!opt->graph) {
 340                         if (commit->object.flags & BOUNDARY)
 341                                 putchar('-');
 342                         else if (commit->object.flags & UNINTERESTING)
 343                                 putchar('^');
 344                         else if (opt->left_right) {
 345                                 if (commit->object.flags & SYMMETRIC_LEFT)
 346                                         putchar('<');
 347                                 else
 348                                         putchar('>');
 349                         }
 350                 }
 351                 fputs(find_unique_abbrev(commit->object.sha1, abbrev_commit),
 352                       stdout);
 353                 if (opt->print_parents)
 354                         show_parents(commit, abbrev_commit);
 355                 if (parent)
 356                         printf(" (from %s)",
 357                                find_unique_abbrev(parent->object.sha1,
 358                                                   abbrev_commit));
 359                 show_decorations(opt, commit);
 360                 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
 361                 if (opt->commit_format == CMIT_FMT_ONELINE) {
 362                         putchar(' ');
 363                 } else {
 364                         putchar('\n');
 365                         graph_show_oneline(opt->graph);
 366                 }
 367                 if (opt->reflog_info) {
 368                         /*
 369                          * setup_revisions() ensures that opt->reflog_info
 370                          * and opt->graph cannot both be set,
 371                          * so we don't need to worry about printing the
 372                          * graph info here.
 373                          */
 374                         show_reflog_message(opt->reflog_info,
 375                                     opt->commit_format == CMIT_FMT_ONELINE,
 376                                     opt->date_mode);
 377                         if (opt->commit_format == CMIT_FMT_ONELINE)
 378                                 return;
 379                 }
 380         }
 381
 382         if (!commit->buffer)
 383                 return;
 384
 385         /*
 386          * And then the pretty-printed message itself
 387          */
 388         if (need_8bit_cte >= 0)
 389                 need_8bit_cte = has_non_ascii(opt->add_signoff);
 390         pretty_print_commit(opt->commit_format, commit, &msgbuf,
 391                             abbrev, subject, extra_headers, opt->date_mode,
 392                             need_8bit_cte);
 393
 394         if (opt->add_signoff)
 395                 append_signoff(&msgbuf, opt->add_signoff);
 396         if (opt->show_log_size) {
 397                 printf("log size %i\n", (int)msgbuf.len);
 398                 graph_show_oneline(opt->graph);
 399         }
 400
 401         /*
 402          * Set opt->missing_newline if msgbuf doesn't
 403          * end in a newline (including if it is empty)
 404          */
 405         if (!msgbuf.len || msgbuf.buf[msgbuf.len - 1] != '\n')
 406                 opt->missing_newline = 1;
 407         else
 408                 opt->missing_newline = 0;
 409
 410         if (opt->graph)
 411                 graph_show_commit_msg(opt->graph, &msgbuf);
 412         else
 413                 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
 414         if (opt->use_terminator) {
 415                 if (!opt->missing_newline)
 416                         graph_show_padding(opt->graph);
 417                 putchar('\n');
 418         }
 419
 420         strbuf_release(&msgbuf);
 421 }
 422
 423 int log_tree_diff_flush(struct rev_info *opt)
 424 {
 425         diffcore_std(&opt->diffopt);
 426
 427         if (diff_queue_is_empty()) {
 428                 int saved_fmt = opt->diffopt.output_format;
 429                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 430                 diff_flush(&opt->diffopt);
 431                 opt->diffopt.output_format = saved_fmt;
 432                 return 0;
 433         }
 434
 435         if (opt->loginfo && !opt->no_commit_id) {
 436                 /* When showing a verbose header (i.e. log message),
 437                  * and not in --pretty=oneline format, we would want
 438                  * an extra newline between the end of log and the
 439                  * output for readability.
 440                  */
 441                 show_log(opt);
 442                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 443                     opt->verbose_header &&
 444                     opt->commit_format != CMIT_FMT_ONELINE) {
 445                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 446                         if ((pch & opt->diffopt.output_format) == pch)
 447                                 printf("---");
 448                         putchar('\n');
 449                 }
 450         }
 451         diff_flush(&opt->diffopt);
 452         return 1;
 453 }
 454
 455 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 456 {
 457         unsigned const char *sha1 = commit->object.sha1;
 458
 459         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 460         return !opt->loginfo;
 461 }
 462
 463 /*
 464  * Show the diff of a commit.
 465  *
 466  * Return true if we printed any log info messages
 467  */
 468 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 469 {
 470         int showed_log;
 471         struct commit_list *parents;
 472         unsigned const char *sha1 = commit->object.sha1;
 473
 474         if (!opt->diff && !DIFF_OPT_TST(&opt->diffopt, EXIT_WITH_STATUS))
 475                 return 0;
 476
 477         /* Root commit? */
 478         parents = commit->parents;
 479         if (!parents) {
 480                 if (opt->show_root_diff) {
 481                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 482                         log_tree_diff_flush(opt);
 483                 }
 484                 return !opt->loginfo;
 485         }
 486
 487         /* More than one parent? */
 488         if (parents && parents->next) {
 489                 if (opt->ignore_merges)
 490                         return 0;
 491                 else if (opt->combine_merges)
 492                         return do_diff_combined(opt, commit);
 493
 494                 /* If we show individual diffs, show the parent info */
 495                 log->parent = parents->item;
 496         }
 497
 498         showed_log = 0;
 499         for (;;) {
 500                 struct commit *parent = parents->item;
 501
 502                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 503                 log_tree_diff_flush(opt);
 504
 505                 showed_log |= !opt->loginfo;
 506
 507                 /* Set up the log info for the next parent, if any.. */
 508                 parents = parents->next;
 509                 if (!parents)
 510                         break;
 511                 log->parent = parents->item;
 512                 opt->loginfo = log;
 513         }
 514         return showed_log;
 515 }
 516
 517 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 518 {
 519         struct log_info log;
 520         int shown;
 521
 522         log.commit = commit;
 523         log.parent = NULL;
 524         opt->loginfo = &log;
 525
 526         shown = log_tree_diff(opt, commit, &log);
 527         if (!shown && opt->loginfo && opt->always_show_header) {
 528                 log.parent = NULL;
 529                 show_log(opt);
 530                 shown = 1;
 531         }
 532         opt->loginfo = NULL;
 533         maybe_flush_or_die(stdout, "stdout");
 534         return shown;
 535 }