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 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 static int has_non_ascii(const char *s)
 129 {
 130         int ch;
 131         if (!s)
 132                 return 0;
 133         while ((ch = *s++) != '\0') {
 134                 if (non_ascii(ch))
 135                         return 1;
 136         }
 137         return 0;
 138 }
 139
 140 void show_log(struct rev_info *opt, const char *sep)
 141 {
 142         struct strbuf msgbuf;
 143         struct log_info *log = opt->loginfo;
 144         struct commit *commit = log->commit, *parent = log->parent;
 145         int abbrev = opt->diffopt.abbrev;
 146         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 147         const char *extra;
 148         const char *subject = NULL, *extra_headers = opt->extra_headers;
 149
 150         opt->loginfo = NULL;
 151         if (!opt->verbose_header) {
 152                 if (opt->left_right) {
 153                         if (commit->object.flags & BOUNDARY)
 154                                 putchar('-');
 155                         else if (commit->object.flags & SYMMETRIC_LEFT)
 156                                 putchar('<');
 157                         else
 158                                 putchar('>');
 159                 }
 160                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 161                 if (opt->parents)
 162                         show_parents(commit, abbrev_commit);
 163                 show_decorations(commit);
 164                 putchar(opt->diffopt.line_termination);
 165                 return;
 166         }
 167
 168         /*
 169          * The "oneline" format has several special cases:
 170          *  - The pretty-printed commit lacks a newline at the end
 171          *    of the buffer, but we do want to make sure that we
 172          *    have a newline there. If the separator isn't already
 173          *    a newline, add an extra one.
 174          *  - unlike other log messages, the one-line format does
 175          *    not have an empty line between entries.
 176          */
 177         extra = "";
 178         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
 179                 extra = "\n";
 180         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
 181                 putchar(opt->diffopt.line_termination);
 182         opt->shown_one = 1;
 183
 184         /*
 185          * Print header line of header..
 186          */
 187
 188         if (opt->commit_format == CMIT_FMT_EMAIL) {
 189                 char *sha1 = sha1_to_hex(commit->object.sha1);
 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", sha1);
 209                 if (opt->message_id)
 210                         printf("Message-Id: <%s>\n", opt->message_id);
 211                 if (opt->ref_message_id)
 212                         printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 213                                opt->ref_message_id, opt->ref_message_id);
 214                 if (opt->mime_boundary) {
 215                         static char subject_buffer[1024];
 216                         static char buffer[1024];
 217                         snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 218                                  "%s"
 219                                  "MIME-Version: 1.0\n"
 220                                  "Content-Type: multipart/mixed;"
 221                                  " boundary=\"%s%s\"\n"
 222                                  "\n"
 223                                  "This is a multi-part message in MIME "
 224                                  "format.\n"
 225                                  "--%s%s\n"
 226                                  "Content-Type: text/plain; "
 227                                  "charset=UTF-8; format=fixed\n"
 228                                  "Content-Transfer-Encoding: 8bit\n\n",
 229                                  extra_headers ? extra_headers : "",
 230                                  mime_boundary_leader, opt->mime_boundary,
 231                                  mime_boundary_leader, opt->mime_boundary);
 232                         extra_headers = subject_buffer;
 233
 234                         snprintf(buffer, sizeof(buffer) - 1,
 235                                  "--%s%s\n"
 236                                  "Content-Type: text/x-patch;"
 237                                  " name=\"%s.diff\"\n"
 238                                  "Content-Transfer-Encoding: 8bit\n"
 239                                  "Content-Disposition: %s;"
 240                                  " filename=\"%s.diff\"\n\n",
 241                                  mime_boundary_leader, opt->mime_boundary,
 242                                  sha1,
 243                                  opt->no_inline ? "attachment" : "inline",
 244                                  sha1);
 245                         opt->diffopt.stat_sep = buffer;
 246                 }
 247         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 248                 fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
 249                       stdout);
 250                 if (opt->commit_format != CMIT_FMT_ONELINE)
 251                         fputs("commit ", stdout);
 252                 if (commit->object.flags & BOUNDARY)
 253                         putchar('-');
 254                 else if (opt->left_right) {
 255                         if (commit->object.flags & SYMMETRIC_LEFT)
 256                                 putchar('<');
 257                         else
 258                                 putchar('>');
 259                 }
 260                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 261                       stdout);
 262                 if (opt->parents)
 263                         show_parents(commit, abbrev_commit);
 264                 if (parent)
 265                         printf(" (from %s)",
 266                                diff_unique_abbrev(parent->object.sha1,
 267                                                   abbrev_commit));
 268                 show_decorations(commit);
 269                 printf("%s",
 270                        diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
 271                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 272                 if (opt->reflog_info) {
 273                         show_reflog_message(opt->reflog_info,
 274                                     opt->commit_format == CMIT_FMT_ONELINE,
 275                                     opt->date_mode);
 276                         if (opt->commit_format == CMIT_FMT_ONELINE) {
 277                                 printf("%s", sep);
 278                                 return;
 279                         }
 280                 }
 281         }
 282
 283         /*
 284          * And then the pretty-printed message itself
 285          */
 286         strbuf_init(&msgbuf, 0);
 287         pretty_print_commit(opt->commit_format, commit, &msgbuf,
 288                             abbrev, subject, extra_headers, opt->date_mode,
 289                             has_non_ascii(opt->add_signoff));
 290
 291         if (opt->add_signoff)
 292                 append_signoff(&msgbuf, opt->add_signoff);
 293         if (opt->show_log_size)
 294                 printf("log size %i\n", (int)msgbuf.len);
 295
 296         if (msgbuf.len)
 297                 printf("%s%s%s", msgbuf.buf, extra, sep);
 298         strbuf_release(&msgbuf);
 299 }
 300
 301 int log_tree_diff_flush(struct rev_info *opt)
 302 {
 303         diffcore_std(&opt->diffopt);
 304
 305         if (diff_queue_is_empty()) {
 306                 int saved_fmt = opt->diffopt.output_format;
 307                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 308                 diff_flush(&opt->diffopt);
 309                 opt->diffopt.output_format = saved_fmt;
 310                 return 0;
 311         }
 312
 313         if (opt->loginfo && !opt->no_commit_id) {
 314                 /* When showing a verbose header (i.e. log message),
 315                  * and not in --pretty=oneline format, we would want
 316                  * an extra newline between the end of log and the
 317                  * output for readability.
 318                  */
 319                 show_log(opt, opt->diffopt.msg_sep);
 320                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 321                     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 }