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 log_write_email_headers(struct rev_info *opt, const char *name,
 141                              const char **subject_p,
 142                              const char **extra_headers_p,
 143                              int *need_8bit_cte_p)
 144 {
 145         const char *subject = NULL;
 146         const char *extra_headers = opt->extra_headers;
 147
 148         *need_8bit_cte_p = 0; /* unknown */
 149         if (opt->total > 0) {
 150                 static char buffer[64];
 151                 snprintf(buffer, sizeof(buffer),
 152                          "Subject: [%s %0*d/%d] ",
 153                          opt->subject_prefix,
 154                          digits_in_number(opt->total),
 155                          opt->nr, opt->total);
 156                 subject = buffer;
 157         } else if (opt->total == 0 && opt->subject_prefix && *opt->subject_prefix) {
 158                 static char buffer[256];
 159                 snprintf(buffer, sizeof(buffer),
 160                          "Subject: [%s] ",
 161                          opt->subject_prefix);
 162                 subject = buffer;
 163         } else {
 164                 subject = "Subject: ";
 165         }
 166
 167         printf("From %s Mon Sep 17 00:00:00 2001\n", name);
 168         if (opt->message_id)
 169                 printf("Message-Id: <%s>\n", opt->message_id);
 170         if (opt->ref_message_id)
 171                 printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 172                        opt->ref_message_id, opt->ref_message_id);
 173         if (opt->mime_boundary) {
 174                 static char subject_buffer[1024];
 175                 static char buffer[1024];
 176                 *need_8bit_cte_p = -1; /* NEVER */
 177                 snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 178                          "%s"
 179                          "MIME-Version: 1.0\n"
 180                          "Content-Type: multipart/mixed;"
 181                          " boundary=\"%s%s\"\n"
 182                          "\n"
 183                          "This is a multi-part message in MIME "
 184                          "format.\n"
 185                          "--%s%s\n"
 186                          "Content-Type: text/plain; "
 187                          "charset=UTF-8; format=fixed\n"
 188                          "Content-Transfer-Encoding: 8bit\n\n",
 189                          extra_headers ? extra_headers : "",
 190                          mime_boundary_leader, opt->mime_boundary,
 191                          mime_boundary_leader, opt->mime_boundary);
 192                 extra_headers = subject_buffer;
 193
 194                 snprintf(buffer, sizeof(buffer) - 1,
 195                          "--%s%s\n"
 196                          "Content-Type: text/x-patch;"
 197                          " name=\"%s.diff\"\n"
 198                          "Content-Transfer-Encoding: 8bit\n"
 199                          "Content-Disposition: %s;"
 200                          " filename=\"%s.diff\"\n\n",
 201                          mime_boundary_leader, opt->mime_boundary,
 202                          name,
 203                          opt->no_inline ? "attachment" : "inline",
 204                          name);
 205                 opt->diffopt.stat_sep = buffer;
 206         }
 207         *subject_p = subject;
 208         *extra_headers_p = extra_headers;
 209 }
 210
 211 void show_log(struct rev_info *opt, const char *sep)
 212 {
 213         struct strbuf msgbuf;
 214         struct log_info *log = opt->loginfo;
 215         struct commit *commit = log->commit, *parent = log->parent;
 216         int abbrev = opt->diffopt.abbrev;
 217         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 218         const char *extra;
 219         const char *subject = NULL, *extra_headers = opt->extra_headers;
 220         int need_8bit_cte = 0;
 221
 222         opt->loginfo = NULL;
 223         if (!opt->verbose_header) {
 224                 if (commit->object.flags & BOUNDARY)
 225                         putchar('-');
 226                 else if (commit->object.flags & UNINTERESTING)
 227                         putchar('^');
 228                 else if (opt->left_right) {
 229                         if (commit->object.flags & SYMMETRIC_LEFT)
 230                                 putchar('<');
 231                         else
 232                                 putchar('>');
 233                 }
 234                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 235                 if (opt->parents)
 236                         show_parents(commit, abbrev_commit);
 237                 show_decorations(commit);
 238                 putchar(opt->diffopt.line_termination);
 239                 return;
 240         }
 241
 242         /*
 243          * The "oneline" format has several special cases:
 244          *  - The pretty-printed commit lacks a newline at the end
 245          *    of the buffer, but we do want to make sure that we
 246          *    have a newline there. If the separator isn't already
 247          *    a newline, add an extra one.
 248          *  - unlike other log messages, the one-line format does
 249          *    not have an empty line between entries.
 250          */
 251         extra = "";
 252         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
 253                 extra = "\n";
 254         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
 255                 putchar(opt->diffopt.line_termination);
 256         opt->shown_one = 1;
 257
 258         /*
 259          * Print header line of header..
 260          */
 261
 262         if (opt->commit_format == CMIT_FMT_EMAIL) {
 263                 log_write_email_headers(opt, sha1_to_hex(commit->object.sha1),
 264                                         &subject, &extra_headers,
 265                                         &need_8bit_cte);
 266         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 267                 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
 268                 if (opt->commit_format != CMIT_FMT_ONELINE)
 269                         fputs("commit ", stdout);
 270                 if (commit->object.flags & BOUNDARY)
 271                         putchar('-');
 272                 else if (commit->object.flags & UNINTERESTING)
 273                         putchar('^');
 274                 else if (opt->left_right) {
 275                         if (commit->object.flags & SYMMETRIC_LEFT)
 276                                 putchar('<');
 277                         else
 278                                 putchar('>');
 279                 }
 280                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 281                       stdout);
 282                 if (opt->parents)
 283                         show_parents(commit, abbrev_commit);
 284                 if (parent)
 285                         printf(" (from %s)",
 286                                diff_unique_abbrev(parent->object.sha1,
 287                                                   abbrev_commit));
 288                 show_decorations(commit);
 289                 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
 290                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 291                 if (opt->reflog_info) {
 292                         show_reflog_message(opt->reflog_info,
 293                                     opt->commit_format == CMIT_FMT_ONELINE,
 294                                     opt->date_mode);
 295                         if (opt->commit_format == CMIT_FMT_ONELINE) {
 296                                 printf("%s", sep);
 297                                 return;
 298                         }
 299                 }
 300         }
 301
 302         if (!commit->buffer)
 303                 return;
 304
 305         /*
 306          * And then the pretty-printed message itself
 307          */
 308         strbuf_init(&msgbuf, 0);
 309         if (need_8bit_cte >= 0)
 310                 need_8bit_cte = has_non_ascii(opt->add_signoff);
 311         pretty_print_commit(opt->commit_format, commit, &msgbuf,
 312                             abbrev, subject, extra_headers, opt->date_mode,
 313                             need_8bit_cte);
 314
 315         if (opt->add_signoff)
 316                 append_signoff(&msgbuf, opt->add_signoff);
 317         if (opt->show_log_size)
 318                 printf("log size %i\n", (int)msgbuf.len);
 319
 320         if (msgbuf.len) {
 321                 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
 322                 printf("%s%s", extra, sep);
 323         }
 324         strbuf_release(&msgbuf);
 325 }
 326
 327 int log_tree_diff_flush(struct rev_info *opt)
 328 {
 329         diffcore_std(&opt->diffopt);
 330
 331         if (diff_queue_is_empty()) {
 332                 int saved_fmt = opt->diffopt.output_format;
 333                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 334                 diff_flush(&opt->diffopt);
 335                 opt->diffopt.output_format = saved_fmt;
 336                 return 0;
 337         }
 338
 339         if (opt->loginfo && !opt->no_commit_id) {
 340                 /* When showing a verbose header (i.e. log message),
 341                  * and not in --pretty=oneline format, we would want
 342                  * an extra newline between the end of log and the
 343                  * output for readability.
 344                  */
 345                 show_log(opt, opt->diffopt.msg_sep);
 346                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 347                     opt->verbose_header &&
 348                     opt->commit_format != CMIT_FMT_ONELINE) {
 349                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 350                         if ((pch & opt->diffopt.output_format) == pch)
 351                                 printf("---");
 352                         putchar('\n');
 353                 }
 354         }
 355         diff_flush(&opt->diffopt);
 356         return 1;
 357 }
 358
 359 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 360 {
 361         unsigned const char *sha1 = commit->object.sha1;
 362
 363         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 364         return !opt->loginfo;
 365 }
 366
 367 /*
 368  * Show the diff of a commit.
 369  *
 370  * Return true if we printed any log info messages
 371  */
 372 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 373 {
 374         int showed_log;
 375         struct commit_list *parents;
 376         unsigned const char *sha1 = commit->object.sha1;
 377
 378         if (!opt->diff)
 379                 return 0;
 380
 381         /* Root commit? */
 382         parents = commit->parents;
 383         if (!parents) {
 384                 if (opt->show_root_diff) {
 385                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 386                         log_tree_diff_flush(opt);
 387                 }
 388                 return !opt->loginfo;
 389         }
 390
 391         /* More than one parent? */
 392         if (parents && parents->next) {
 393                 if (opt->ignore_merges)
 394                         return 0;
 395                 else if (opt->combine_merges)
 396                         return do_diff_combined(opt, commit);
 397
 398                 /* If we show individual diffs, show the parent info */
 399                 log->parent = parents->item;
 400         }
 401
 402         showed_log = 0;
 403         for (;;) {
 404                 struct commit *parent = parents->item;
 405
 406                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 407                 log_tree_diff_flush(opt);
 408
 409                 showed_log |= !opt->loginfo;
 410
 411                 /* Set up the log info for the next parent, if any.. */
 412                 parents = parents->next;
 413                 if (!parents)
 414                         break;
 415                 log->parent = parents->item;
 416                 opt->loginfo = log;
 417         }
 418         return showed_log;
 419 }
 420
 421 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 422 {
 423         struct log_info log;
 424         int shown;
 425
 426         log.commit = commit;
 427         log.parent = NULL;
 428         opt->loginfo = &log;
 429
 430         shown = log_tree_diff(opt, commit, &log);
 431         if (!shown && opt->loginfo && opt->always_show_header) {
 432                 log.parent = NULL;
 433                 show_log(opt, "");
 434                 shown = 1;
 435         }
 436         opt->loginfo = NULL;
 437         maybe_flush_or_die(stdout, "stdout");
 438         return shown;
 439 }