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 unsigned long append_signoff(char **buf_p, unsigned long *buf_sz_p,
  83                                     unsigned long at, const char *signoff)
  84 {
  85         static const char signed_off_by[] = "Signed-off-by: ";
  86         size_t signoff_len = strlen(signoff);
  87         int has_signoff = 0;
  88         char *cp;
  89         char *buf;
  90         unsigned long buf_sz;
  91
  92         buf = *buf_p;
  93         buf_sz = *buf_sz_p;
  94         if (buf_sz <= at + strlen(signed_off_by) + signoff_len + 3) {
  95                 buf_sz += strlen(signed_off_by) + signoff_len + 3;
  96                 buf = xrealloc(buf, buf_sz);
  97                 *buf_p = buf;
  98                 *buf_sz_p = buf_sz;
  99         }
 100         cp = buf;
 101
 102         /* First see if we already have the sign-off by the signer */
 103         while ((cp = strstr(cp, signed_off_by))) {
 104
 105                 has_signoff = 1;
 106
 107                 cp += strlen(signed_off_by);
 108                 if (cp + signoff_len >= buf + at)
 109                         break;
 110                 if (strncmp(cp, signoff, signoff_len))
 111                         continue;
 112                 if (!isspace(cp[signoff_len]))
 113                         continue;
 114                 /* we already have him */
 115                 return at;
 116         }
 117
 118         if (!has_signoff)
 119                 has_signoff = detect_any_signoff(buf, at);
 120
 121         if (!has_signoff)
 122                 buf[at++] = '\n';
 123
 124         strcpy(buf + at, signed_off_by);
 125         at += strlen(signed_off_by);
 126         strcpy(buf + at, signoff);
 127         at += signoff_len;
 128         buf[at++] = '\n';
 129         buf[at] = 0;
 130         return at;
 131 }
 132
 133 static unsigned int digits_in_number(unsigned int number)
 134 {
 135         unsigned int i = 10, result = 1;
 136         while (i <= number) {
 137                 i *= 10;
 138                 result++;
 139         }
 140         return result;
 141 }
 142
 143 void show_log(struct rev_info *opt, const char *sep)
 144 {
 145         char *msgbuf = NULL;
 146         unsigned long msgbuf_len = 0;
 147         struct log_info *log = opt->loginfo;
 148         struct commit *commit = log->commit, *parent = log->parent;
 149         int abbrev = opt->diffopt.abbrev;
 150         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 151         const char *extra;
 152         int len;
 153         const char *subject = NULL, *extra_headers = opt->extra_headers;
 154
 155         opt->loginfo = NULL;
 156         if (!opt->verbose_header) {
 157                 if (opt->left_right) {
 158                         if (commit->object.flags & BOUNDARY)
 159                                 putchar('-');
 160                         else if (commit->object.flags & SYMMETRIC_LEFT)
 161                                 putchar('<');
 162                         else
 163                                 putchar('>');
 164                 }
 165                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 166                 if (opt->parents)
 167                         show_parents(commit, abbrev_commit);
 168                 show_decorations(commit);
 169                 putchar(opt->diffopt.line_termination);
 170                 return;
 171         }
 172
 173         /*
 174          * The "oneline" format has several special cases:
 175          *  - The pretty-printed commit lacks a newline at the end
 176          *    of the buffer, but we do want to make sure that we
 177          *    have a newline there. If the separator isn't already
 178          *    a newline, add an extra one.
 179          *  - unlike other log messages, the one-line format does
 180          *    not have an empty line between entries.
 181          */
 182         extra = "";
 183         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
 184                 extra = "\n";
 185         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
 186                 putchar(opt->diffopt.line_termination);
 187         opt->shown_one = 1;
 188
 189         /*
 190          * Print header line of header..
 191          */
 192
 193         if (opt->commit_format == CMIT_FMT_EMAIL) {
 194                 char *sha1 = sha1_to_hex(commit->object.sha1);
 195                 if (opt->total > 0) {
 196                         static char buffer[64];
 197                         snprintf(buffer, sizeof(buffer),
 198                                         "Subject: [%s %0*d/%d] ",
 199                                         opt->subject_prefix,
 200                                         digits_in_number(opt->total),
 201                                         opt->nr, opt->total);
 202                         subject = buffer;
 203                 } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 204                         static char buffer[256];
 205                         snprintf(buffer, sizeof(buffer),
 206                                         "Subject: [%s] ",
 207                                         opt->subject_prefix);
 208                         subject = buffer;
 209                 } else {
 210                         subject = "Subject: ";
 211                 }
 212
 213                 printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
 214                 if (opt->message_id)
 215                         printf("Message-Id: <%s>\n", opt->message_id);
 216                 if (opt->ref_message_id)
 217                         printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 218                                opt->ref_message_id, opt->ref_message_id);
 219                 if (opt->mime_boundary) {
 220                         static char subject_buffer[1024];
 221                         static char buffer[1024];
 222                         snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 223                                  "%s"
 224                                  "MIME-Version: 1.0\n"
 225                                  "Content-Type: multipart/mixed;"
 226                                  " boundary=\"%s%s\"\n"
 227                                  "\n"
 228                                  "This is a multi-part message in MIME "
 229                                  "format.\n"
 230                                  "--%s%s\n"
 231                                  "Content-Type: text/plain; "
 232                                  "charset=UTF-8; format=fixed\n"
 233                                  "Content-Transfer-Encoding: 8bit\n\n",
 234                                  extra_headers ? extra_headers : "",
 235                                  mime_boundary_leader, opt->mime_boundary,
 236                                  mime_boundary_leader, opt->mime_boundary);
 237                         extra_headers = subject_buffer;
 238
 239                         snprintf(buffer, sizeof(buffer) - 1,
 240                                  "--%s%s\n"
 241                                  "Content-Type: text/x-patch;"
 242                                  " name=\"%s.diff\"\n"
 243                                  "Content-Transfer-Encoding: 8bit\n"
 244                                  "Content-Disposition: %s;"
 245                                  " filename=\"%s.diff\"\n\n",
 246                                  mime_boundary_leader, opt->mime_boundary,
 247                                  sha1,
 248                                  opt->no_inline ? "attachment" : "inline",
 249                                  sha1);
 250                         opt->diffopt.stat_sep = buffer;
 251                 }
 252         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 253                 fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
 254                       stdout);
 255                 if (opt->commit_format != CMIT_FMT_ONELINE)
 256                         fputs("commit ", stdout);
 257                 if (commit->object.flags & BOUNDARY)
 258                         putchar('-');
 259                 else if (opt->left_right) {
 260                         if (commit->object.flags & SYMMETRIC_LEFT)
 261                                 putchar('<');
 262                         else
 263                                 putchar('>');
 264                 }
 265                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 266                       stdout);
 267                 if (opt->parents)
 268                         show_parents(commit, abbrev_commit);
 269                 if (parent)
 270                         printf(" (from %s)",
 271                                diff_unique_abbrev(parent->object.sha1,
 272                                                   abbrev_commit));
 273                 show_decorations(commit);
 274                 printf("%s",
 275                        diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
 276                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 277                 if (opt->reflog_info) {
 278                         show_reflog_message(opt->reflog_info,
 279                                     opt->commit_format == CMIT_FMT_ONELINE,
 280                                     opt->date_mode);
 281                         if (opt->commit_format == CMIT_FMT_ONELINE) {
 282                                 printf("%s", sep);
 283                                 return;
 284                         }
 285                 }
 286         }
 287
 288         /*
 289          * And then the pretty-printed message itself
 290          */
 291         len = pretty_print_commit(opt->commit_format, commit, ~0u,
 292                                   &msgbuf, &msgbuf_len, abbrev, subject,
 293                                   extra_headers, opt->date_mode);
 294
 295         if (opt->add_signoff)
 296                 len = append_signoff(&msgbuf, &msgbuf_len, len,
 297                                      opt->add_signoff);
 298         printf("%s%s%s", msgbuf, extra, sep);
 299         free(msgbuf);
 300 }
 301
 302 int log_tree_diff_flush(struct rev_info *opt)
 303 {
 304         diffcore_std(&opt->diffopt);
 305
 306         if (diff_queue_is_empty()) {
 307                 int saved_fmt = opt->diffopt.output_format;
 308                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 309                 diff_flush(&opt->diffopt);
 310                 opt->diffopt.output_format = saved_fmt;
 311                 return 0;
 312         }
 313
 314         if (opt->loginfo && !opt->no_commit_id) {
 315                 /* When showing a verbose header (i.e. log message),
 316                  * and not in --pretty=oneline format, we would want
 317                  * an extra newline between the end of log and the
 318                  * output for readability.
 319                  */
 320                 show_log(opt, opt->diffopt.msg_sep);
 321                 if (opt->verbose_header &&
 322                     opt->commit_format != CMIT_FMT_ONELINE) {
 323                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 324                         if ((pch & opt->diffopt.output_format) == pch)
 325                                 printf("---");
 326                         putchar('\n');
 327                 }
 328         }
 329         diff_flush(&opt->diffopt);
 330         return 1;
 331 }
 332
 333 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 334 {
 335         unsigned const char *sha1 = commit->object.sha1;
 336
 337         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 338         return !opt->loginfo;
 339 }
 340
 341 /*
 342  * Show the diff of a commit.
 343  *
 344  * Return true if we printed any log info messages
 345  */
 346 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 347 {
 348         int showed_log;
 349         struct commit_list *parents;
 350         unsigned const char *sha1 = commit->object.sha1;
 351
 352         if (!opt->diff)
 353                 return 0;
 354
 355         /* Root commit? */
 356         parents = commit->parents;
 357         if (!parents) {
 358                 if (opt->show_root_diff) {
 359                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 360                         log_tree_diff_flush(opt);
 361                 }
 362                 return !opt->loginfo;
 363         }
 364
 365         /* More than one parent? */
 366         if (parents && parents->next) {
 367                 if (opt->ignore_merges)
 368                         return 0;
 369                 else if (opt->combine_merges)
 370                         return do_diff_combined(opt, commit);
 371
 372                 /* If we show individual diffs, show the parent info */
 373                 log->parent = parents->item;
 374         }
 375
 376         showed_log = 0;
 377         for (;;) {
 378                 struct commit *parent = parents->item;
 379
 380                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 381                 log_tree_diff_flush(opt);
 382
 383                 showed_log |= !opt->loginfo;
 384
 385                 /* Set up the log info for the next parent, if any.. */
 386                 parents = parents->next;
 387                 if (!parents)
 388                         break;
 389                 log->parent = parents->item;
 390                 opt->loginfo = log;
 391         }
 392         return showed_log;
 393 }
 394
 395 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 396 {
 397         struct log_info log;
 398         int shown;
 399
 400         log.commit = commit;
 401         log.parent = NULL;
 402         opt->loginfo = &log;
 403
 404         shown = log_tree_diff(opt, commit, &log);
 405         if (!shown && opt->loginfo && opt->always_show_header) {
 406                 log.parent = NULL;
 407                 show_log(opt, "");
 408                 shown = 1;
 409         }
 410         opt->loginfo = NULL;
 411         maybe_flush_or_die(stdout, "stdout");
 412         return shown;
 413 }