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