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)
 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 *subject = NULL, *extra_headers = opt->extra_headers;
 219         int need_8bit_cte = 0;
 220
 221         opt->loginfo = NULL;
 222         if (!opt->verbose_header) {
 223                 if (commit->object.flags & BOUNDARY)
 224                         putchar('-');
 225                 else if (commit->object.flags & UNINTERESTING)
 226                         putchar('^');
 227                 else if (opt->left_right) {
 228                         if (commit->object.flags & SYMMETRIC_LEFT)
 229                                 putchar('<');
 230                         else
 231                                 putchar('>');
 232                 }
 233                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 234                 if (opt->parents)
 235                         show_parents(commit, abbrev_commit);
 236                 show_decorations(commit);
 237                 putchar(opt->diffopt.line_termination);
 238                 return;
 239         }
 240
 241         /*
 242          * If use_terminator is set, add a newline at the end of the entry.
 243          * Otherwise, add a diffopt.line_termination character before all
 244          * entries but the first.  (IOW, as a separator between entries)
 245          */
 246         if (opt->shown_one && !opt->use_terminator)
 247                 putchar(opt->diffopt.line_termination);
 248         opt->shown_one = 1;
 249
 250         /*
 251          * Print header line of header..
 252          */
 253
 254         if (opt->commit_format == CMIT_FMT_EMAIL) {
 255                 log_write_email_headers(opt, sha1_to_hex(commit->object.sha1),
 256                                         &subject, &extra_headers,
 257                                         &need_8bit_cte);
 258         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 259                 fputs(diff_get_color_opt(&opt->diffopt, DIFF_COMMIT), stdout);
 260                 if (opt->commit_format != CMIT_FMT_ONELINE)
 261                         fputs("commit ", stdout);
 262                 if (commit->object.flags & BOUNDARY)
 263                         putchar('-');
 264                 else if (commit->object.flags & UNINTERESTING)
 265                         putchar('^');
 266                 else if (opt->left_right) {
 267                         if (commit->object.flags & SYMMETRIC_LEFT)
 268                                 putchar('<');
 269                         else
 270                                 putchar('>');
 271                 }
 272                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 273                       stdout);
 274                 if (opt->parents)
 275                         show_parents(commit, abbrev_commit);
 276                 if (parent)
 277                         printf(" (from %s)",
 278                                diff_unique_abbrev(parent->object.sha1,
 279                                                   abbrev_commit));
 280                 show_decorations(commit);
 281                 printf("%s", diff_get_color_opt(&opt->diffopt, DIFF_RESET));
 282                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 283                 if (opt->reflog_info) {
 284                         show_reflog_message(opt->reflog_info,
 285                                     opt->commit_format == CMIT_FMT_ONELINE,
 286                                     opt->date_mode);
 287                         if (opt->commit_format == CMIT_FMT_ONELINE)
 288                                 return;
 289                 }
 290         }
 291
 292         if (!commit->buffer)
 293                 return;
 294
 295         /*
 296          * And then the pretty-printed message itself
 297          */
 298         strbuf_init(&msgbuf, 0);
 299         if (need_8bit_cte >= 0)
 300                 need_8bit_cte = has_non_ascii(opt->add_signoff);
 301         pretty_print_commit(opt->commit_format, commit, &msgbuf,
 302                             abbrev, subject, extra_headers, opt->date_mode,
 303                             need_8bit_cte);
 304
 305         if (opt->add_signoff)
 306                 append_signoff(&msgbuf, opt->add_signoff);
 307         if (opt->show_log_size)
 308                 printf("log size %i\n", (int)msgbuf.len);
 309
 310         if (msgbuf.len) {
 311                 fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
 312                 if (opt->use_terminator)
 313                         putchar('\n');
 314         }
 315         strbuf_release(&msgbuf);
 316 }
 317
 318 int log_tree_diff_flush(struct rev_info *opt)
 319 {
 320         diffcore_std(&opt->diffopt);
 321
 322         if (diff_queue_is_empty()) {
 323                 int saved_fmt = opt->diffopt.output_format;
 324                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 325                 diff_flush(&opt->diffopt);
 326                 opt->diffopt.output_format = saved_fmt;
 327                 return 0;
 328         }
 329
 330         if (opt->loginfo && !opt->no_commit_id) {
 331                 /* When showing a verbose header (i.e. log message),
 332                  * and not in --pretty=oneline format, we would want
 333                  * an extra newline between the end of log and the
 334                  * output for readability.
 335                  */
 336                 show_log(opt);
 337                 if ((opt->diffopt.output_format & ~DIFF_FORMAT_NO_OUTPUT) &&
 338                     opt->verbose_header &&
 339                     opt->commit_format != CMIT_FMT_ONELINE) {
 340                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 341                         if ((pch & opt->diffopt.output_format) == pch)
 342                                 printf("---");
 343                         putchar('\n');
 344                 }
 345         }
 346         diff_flush(&opt->diffopt);
 347         return 1;
 348 }
 349
 350 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 351 {
 352         unsigned const char *sha1 = commit->object.sha1;
 353
 354         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 355         return !opt->loginfo;
 356 }
 357
 358 /*
 359  * Show the diff of a commit.
 360  *
 361  * Return true if we printed any log info messages
 362  */
 363 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 364 {
 365         int showed_log;
 366         struct commit_list *parents;
 367         unsigned const char *sha1 = commit->object.sha1;
 368
 369         if (!opt->diff)
 370                 return 0;
 371
 372         /* Root commit? */
 373         parents = commit->parents;
 374         if (!parents) {
 375                 if (opt->show_root_diff) {
 376                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 377                         log_tree_diff_flush(opt);
 378                 }
 379                 return !opt->loginfo;
 380         }
 381
 382         /* More than one parent? */
 383         if (parents && parents->next) {
 384                 if (opt->ignore_merges)
 385                         return 0;
 386                 else if (opt->combine_merges)
 387                         return do_diff_combined(opt, commit);
 388
 389                 /* If we show individual diffs, show the parent info */
 390                 log->parent = parents->item;
 391         }
 392
 393         showed_log = 0;
 394         for (;;) {
 395                 struct commit *parent = parents->item;
 396
 397                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 398                 log_tree_diff_flush(opt);
 399
 400                 showed_log |= !opt->loginfo;
 401
 402                 /* Set up the log info for the next parent, if any.. */
 403                 parents = parents->next;
 404                 if (!parents)
 405                         break;
 406                 log->parent = parents->item;
 407                 opt->loginfo = log;
 408         }
 409         return showed_log;
 410 }
 411
 412 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 413 {
 414         struct log_info log;
 415         int shown;
 416
 417         log.commit = commit;
 418         log.parent = NULL;
 419         opt->loginfo = &log;
 420
 421         shown = log_tree_diff(opt, commit, &log);
 422         if (!shown && opt->loginfo && opt->always_show_header) {
 423                 log.parent = NULL;
 424                 show_log(opt);
 425                 shown = 1;
 426         }
 427         opt->loginfo = NULL;
 428         maybe_flush_or_die(stdout, "stdout");
 429         return shown;
 430 }