log-tree.c

   1 #include "cache.h"
   2 #include "diff.h"
   3 #include "commit.h"
   4 #include "log-tree.h"
   5 #include "reflog-walk.h"
   6
   7 struct decoration name_decoration = { "object names" };
   8
   9 static void show_parents(struct commit *commit, int abbrev)
  10 {
  11         struct commit_list *p;
  12         for (p = commit->parents; p ; p = p->next) {
  13                 struct commit *parent = p->item;
  14                 printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
  15         }
  16 }
  17
  18 static void show_decorations(struct commit *commit)
  19 {
  20         const char *prefix;
  21         struct name_decoration *decoration;
  22
  23         decoration = lookup_decoration(&name_decoration, &commit->object);
  24         if (!decoration)
  25                 return;
  26         prefix = " (";
  27         while (decoration) {
  28                 printf("%s%s", prefix, decoration->name);
  29                 prefix = ", ";
  30                 decoration = decoration->next;
  31         }
  32         putchar(')');
  33 }
  34
  35 /*
  36  * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
  37  * Signed-off-by: and Acked-by: lines.
  38  */
  39 static int detect_any_signoff(char *letter, int size)
  40 {
  41         char ch, *cp;
  42         int seen_colon = 0;
  43         int seen_at = 0;
  44         int seen_name = 0;
  45         int seen_head = 0;
  46
  47         cp = letter + size;
  48         while (letter <= --cp && (ch = *cp) == '\n')
  49                 continue;
  50
  51         while (letter <= cp) {
  52                 ch = *cp--;
  53                 if (ch == '\n')
  54                         break;
  55
  56                 if (!seen_at) {
  57                         if (ch == '@')
  58                                 seen_at = 1;
  59                         continue;
  60                 }
  61                 if (!seen_colon) {
  62                         if (ch == '@')
  63                                 return 0;
  64                         else if (ch == ':')
  65                                 seen_colon = 1;
  66                         else
  67                                 seen_name = 1;
  68                         continue;
  69                 }
  70                 if (('A' <= ch && ch <= 'Z') ||
  71                     ('a' <= ch && ch <= 'z') ||
  72                     ch == '-') {
  73                         seen_head = 1;
  74                         continue;
  75                 }
  76                 /* no empty last line doesn't match */
  77                 return 0;
  78         }
  79         return seen_head && seen_name;
  80 }
  81
  82 static void append_signoff(struct strbuf *sb, const char *signoff)
  83 {
  84         static const char signed_off_by[] = "Signed-off-by: ";
  85         size_t signoff_len = strlen(signoff);
  86         int has_signoff = 0;
  87         char *cp;
  88
  89         cp = sb->buf;
  90
  91         /* First see if we already have the sign-off by the signer */
  92         while ((cp = strstr(cp, signed_off_by))) {
  93
  94                 has_signoff = 1;
  95
  96                 cp += strlen(signed_off_by);
  97                 if (cp + signoff_len >= sb->buf + sb->len)
  98                         break;
  99                 if (strncmp(cp, signoff, signoff_len))
 100                         continue;
 101                 if (!isspace(cp[signoff_len]))
 102                         continue;
 103                 /* we already have him */
 104                 return;
 105         }
 106
 107         if (!has_signoff)
 108                 has_signoff = detect_any_signoff(sb->buf, sb->len);
 109
 110         if (!has_signoff)
 111                 strbuf_addch(sb, '\n');
 112
 113         strbuf_addstr(sb, signed_off_by);
 114         strbuf_add(sb, signoff, signoff_len);
 115         strbuf_addch(sb, '\n');
 116 }
 117
 118 static unsigned int digits_in_number(unsigned int number)
 119 {
 120         unsigned int i = 10, result = 1;
 121         while (i <= number) {
 122                 i *= 10;
 123                 result++;
 124         }
 125         return result;
 126 }
 127
 128 void show_log(struct rev_info *opt, const char *sep)
 129 {
 130         struct strbuf msgbuf;
 131         struct log_info *log = opt->loginfo;
 132         struct commit *commit = log->commit, *parent = log->parent;
 133         int abbrev = opt->diffopt.abbrev;
 134         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 135         const char *extra;
 136         const char *subject = NULL, *extra_headers = opt->extra_headers;
 137
 138         opt->loginfo = NULL;
 139         if (!opt->verbose_header) {
 140                 if (opt->left_right) {
 141                         if (commit->object.flags & BOUNDARY)
 142                                 putchar('-');
 143                         else if (commit->object.flags & SYMMETRIC_LEFT)
 144                                 putchar('<');
 145                         else
 146                                 putchar('>');
 147                 }
 148                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 149                 if (opt->parents)
 150                         show_parents(commit, abbrev_commit);
 151                 show_decorations(commit);
 152                 putchar(opt->diffopt.line_termination);
 153                 return;
 154         }
 155
 156         /*
 157          * The "oneline" format has several special cases:
 158          *  - The pretty-printed commit lacks a newline at the end
 159          *    of the buffer, but we do want to make sure that we
 160          *    have a newline there. If the separator isn't already
 161          *    a newline, add an extra one.
 162          *  - unlike other log messages, the one-line format does
 163          *    not have an empty line between entries.
 164          */
 165         extra = "";
 166         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
 167                 extra = "\n";
 168         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
 169                 putchar(opt->diffopt.line_termination);
 170         opt->shown_one = 1;
 171
 172         /*
 173          * Print header line of header..
 174          */
 175
 176         if (opt->commit_format == CMIT_FMT_EMAIL) {
 177                 char *sha1 = sha1_to_hex(commit->object.sha1);
 178                 if (opt->total > 0) {
 179                         static char buffer[64];
 180                         snprintf(buffer, sizeof(buffer),
 181                                         "Subject: [%s %0*d/%d] ",
 182                                         opt->subject_prefix,
 183                                         digits_in_number(opt->total),
 184                                         opt->nr, opt->total);
 185                         subject = buffer;
 186                 } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 187                         static char buffer[256];
 188                         snprintf(buffer, sizeof(buffer),
 189                                         "Subject: [%s] ",
 190                                         opt->subject_prefix);
 191                         subject = buffer;
 192                 } else {
 193                         subject = "Subject: ";
 194                 }
 195
 196                 printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
 197                 if (opt->message_id)
 198                         printf("Message-Id: <%s>\n", opt->message_id);
 199                 if (opt->ref_message_id)
 200                         printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 201                                opt->ref_message_id, opt->ref_message_id);
 202                 if (opt->mime_boundary) {
 203                         static char subject_buffer[1024];
 204                         static char buffer[1024];
 205                         snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 206                                  "%s"
 207                                  "MIME-Version: 1.0\n"
 208                                  "Content-Type: multipart/mixed;"
 209                                  " boundary=\"%s%s\"\n"
 210                                  "\n"
 211                                  "This is a multi-part message in MIME "
 212                                  "format.\n"
 213                                  "--%s%s\n"
 214                                  "Content-Type: text/plain; "
 215                                  "charset=UTF-8; format=fixed\n"
 216                                  "Content-Transfer-Encoding: 8bit\n\n",
 217                                  extra_headers ? extra_headers : "",
 218                                  mime_boundary_leader, opt->mime_boundary,
 219                                  mime_boundary_leader, opt->mime_boundary);
 220                         extra_headers = subject_buffer;
 221
 222                         snprintf(buffer, sizeof(buffer) - 1,
 223                                  "--%s%s\n"
 224                                  "Content-Type: text/x-patch;"
 225                                  " name=\"%s.diff\"\n"
 226                                  "Content-Transfer-Encoding: 8bit\n"
 227                                  "Content-Disposition: %s;"
 228                                  " filename=\"%s.diff\"\n\n",
 229                                  mime_boundary_leader, opt->mime_boundary,
 230                                  sha1,
 231                                  opt->no_inline ? "attachment" : "inline",
 232                                  sha1);
 233                         opt->diffopt.stat_sep = buffer;
 234                 }
 235         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 236                 fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
 237                       stdout);
 238                 if (opt->commit_format != CMIT_FMT_ONELINE)
 239                         fputs("commit ", stdout);
 240                 if (commit->object.flags & BOUNDARY)
 241                         putchar('-');
 242                 else if (opt->left_right) {
 243                         if (commit->object.flags & SYMMETRIC_LEFT)
 244                                 putchar('<');
 245                         else
 246                                 putchar('>');
 247                 }
 248                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 249                       stdout);
 250                 if (opt->parents)
 251                         show_parents(commit, abbrev_commit);
 252                 if (parent)
 253                         printf(" (from %s)",
 254                                diff_unique_abbrev(parent->object.sha1,
 255                                                   abbrev_commit));
 256                 show_decorations(commit);
 257                 printf("%s",
 258                        diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
 259                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 260                 if (opt->reflog_info) {
 261                         show_reflog_message(opt->reflog_info,
 262                                     opt->commit_format == CMIT_FMT_ONELINE,
 263                                     opt->date_mode);
 264                         if (opt->commit_format == CMIT_FMT_ONELINE) {
 265                                 printf("%s", sep);
 266                                 return;
 267                         }
 268                 }
 269         }
 270
 271         /*
 272          * And then the pretty-printed message itself
 273          */
 274         strbuf_init(&msgbuf, 0);
 275         pretty_print_commit(opt->commit_format, commit, &msgbuf,
 276                                   abbrev, subject, extra_headers, opt->date_mode);
 277
 278         if (opt->add_signoff)
 279                 append_signoff(&msgbuf, opt->add_signoff);
 280         if (opt->show_log_size)
 281                 printf("log size %i\n", (int)msgbuf.len);
 282
 283         if (msgbuf.len)
 284                 printf("%s%s%s", msgbuf.buf, extra, sep);
 285         strbuf_release(&msgbuf);
 286 }
 287
 288 int log_tree_diff_flush(struct rev_info *opt)
 289 {
 290         diffcore_std(&opt->diffopt);
 291
 292         if (diff_queue_is_empty()) {
 293                 int saved_fmt = opt->diffopt.output_format;
 294                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 295                 diff_flush(&opt->diffopt);
 296                 opt->diffopt.output_format = saved_fmt;
 297                 return 0;
 298         }
 299
 300         if (opt->loginfo && !opt->no_commit_id) {
 301                 /* When showing a verbose header (i.e. log message),
 302                  * and not in --pretty=oneline format, we would want
 303                  * an extra newline between the end of log and the
 304                  * output for readability.
 305                  */
 306                 show_log(opt, opt->diffopt.msg_sep);
 307                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 308                     opt->verbose_header &&
 309                     opt->commit_format != CMIT_FMT_ONELINE) {
 310                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 311                         if ((pch & opt->diffopt.output_format) == pch)
 312                                 printf("---");
 313                         putchar('\n');
 314                 }
 315         }
 316         diff_flush(&opt->diffopt);
 317         return 1;
 318 }
 319
 320 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 321 {
 322         unsigned const char *sha1 = commit->object.sha1;
 323
 324         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 325         return !opt->loginfo;
 326 }
 327
 328 /*
 329  * Show the diff of a commit.
 330  *
 331  * Return true if we printed any log info messages
 332  */
 333 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 334 {
 335         int showed_log;
 336         struct commit_list *parents;
 337         unsigned const char *sha1 = commit->object.sha1;
 338
 339         if (!opt->diff)
 340                 return 0;
 341
 342         /* Root commit? */
 343         parents = commit->parents;
 344         if (!parents) {
 345                 if (opt->show_root_diff) {
 346                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 347                         log_tree_diff_flush(opt);
 348                 }
 349                 return !opt->loginfo;
 350         }
 351
 352         /* More than one parent? */
 353         if (parents && parents->next) {
 354                 if (opt->ignore_merges)
 355                         return 0;
 356                 else if (opt->combine_merges)
 357                         return do_diff_combined(opt, commit);
 358
 359                 /* If we show individual diffs, show the parent info */
 360                 log->parent = parents->item;
 361         }
 362
 363         showed_log = 0;
 364         for (;;) {
 365                 struct commit *parent = parents->item;
 366
 367                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 368                 log_tree_diff_flush(opt);
 369
 370                 showed_log |= !opt->loginfo;
 371
 372                 /* Set up the log info for the next parent, if any.. */
 373                 parents = parents->next;
 374                 if (!parents)
 375                         break;
 376                 log->parent = parents->item;
 377                 opt->loginfo = log;
 378         }
 379         return showed_log;
 380 }
 381
 382 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 383 {
 384         struct log_info log;
 385         int shown;
 386
 387         log.commit = commit;
 388         log.parent = NULL;
 389         opt->loginfo = &log;
 390
 391         shown = log_tree_diff(opt, commit, &log);
 392         if (!shown && opt->loginfo && opt->always_show_header) {
 393                 log.parent = NULL;
 394                 show_log(opt, "");
 395                 shown = 1;
 396         }
 397         opt->loginfo = NULL;
 398         maybe_flush_or_die(stdout, "stdout");
 399         return shown;
 400 }