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