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 int append_signoff(char *buf, int buf_sz, int at, const char *signoff)
  83 {
  84         static const char signed_off_by[] = "Signed-off-by: ";
  85         int signoff_len = strlen(signoff);
  86         int has_signoff = 0;
  87         char *cp = buf;
  88
  89         /* Do we have enough space to add it? */
  90         if (buf_sz - at <= strlen(signed_off_by) + signoff_len + 3)
  91                 return at;
  92
  93         /* First see if we already have the sign-off by the signer */
  94         while ((cp = strstr(cp, signed_off_by))) {
  95
  96                 has_signoff = 1;
  97
  98                 cp += strlen(signed_off_by);
  99                 if (cp + signoff_len >= buf + at)
 100                         break;
 101                 if (strncmp(cp, signoff, signoff_len))
 102                         continue;
 103                 if (!isspace(cp[signoff_len]))
 104                         continue;
 105                 /* we already have him */
 106                 return at;
 107         }
 108
 109         if (!has_signoff)
 110                 has_signoff = detect_any_signoff(buf, at);
 111
 112         if (!has_signoff)
 113                 buf[at++] = '\n';
 114
 115         strcpy(buf + at, signed_off_by);
 116         at += strlen(signed_off_by);
 117         strcpy(buf + at, signoff);
 118         at += signoff_len;
 119         buf[at++] = '\n';
 120         buf[at] = 0;
 121         return at;
 122 }
 123
 124 static unsigned int digits_in_number(unsigned int number)
 125 {
 126         unsigned int i = 10, result = 1;
 127         while (i <= number) {
 128                 i *= 10;
 129                 result++;
 130         }
 131         return result;
 132 }
 133
 134 void show_log(struct rev_info *opt, const char *sep)
 135 {
 136         static char this_header[16384];
 137         struct log_info *log = opt->loginfo;
 138         struct commit *commit = log->commit, *parent = log->parent;
 139         int abbrev = opt->diffopt.abbrev;
 140         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 141         const char *extra;
 142         int len;
 143         const char *subject = NULL, *extra_headers = opt->extra_headers;
 144
 145         opt->loginfo = NULL;
 146         if (!opt->verbose_header) {
 147                 if (opt->left_right) {
 148                         if (commit->object.flags & BOUNDARY)
 149                                 putchar('-');
 150                         else if (commit->object.flags & SYMMETRIC_LEFT)
 151                                 putchar('<');
 152                         else
 153                                 putchar('>');
 154                 }
 155                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 156                 if (opt->parents)
 157                         show_parents(commit, abbrev_commit);
 158                 show_decorations(commit);
 159                 putchar(opt->diffopt.line_termination);
 160                 return;
 161         }
 162
 163         /*
 164          * The "oneline" format has several special cases:
 165          *  - The pretty-printed commit lacks a newline at the end
 166          *    of the buffer, but we do want to make sure that we
 167          *    have a newline there. If the separator isn't already
 168          *    a newline, add an extra one.
 169          *  - unlike other log messages, the one-line format does
 170          *    not have an empty line between entries.
 171          */
 172         extra = "";
 173         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
 174                 extra = "\n";
 175         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
 176                 putchar(opt->diffopt.line_termination);
 177         opt->shown_one = 1;
 178
 179         /*
 180          * Print header line of header..
 181          */
 182
 183         if (opt->commit_format == CMIT_FMT_EMAIL) {
 184                 char *sha1 = sha1_to_hex(commit->object.sha1);
 185                 if (opt->total > 0) {
 186                         static char buffer[64];
 187                         snprintf(buffer, sizeof(buffer),
 188                                         "Subject: [%s %0*d/%d] ",
 189                                         opt->subject_prefix,
 190                                         digits_in_number(opt->total),
 191                                         opt->nr, opt->total);
 192                         subject = buffer;
 193                 } else if (opt->total == 0) {
 194                         static char buffer[256];
 195                         snprintf(buffer, sizeof(buffer),
 196                                         "Subject: [%s] ",
 197                                         opt->subject_prefix);
 198                         subject = buffer;
 199                 } else {
 200                         subject = "Subject: ";
 201                 }
 202
 203                 printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
 204                 if (opt->message_id)
 205                         printf("Message-Id: <%s>\n", opt->message_id);
 206                 if (opt->ref_message_id)
 207                         printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 208                                opt->ref_message_id, opt->ref_message_id);
 209                 if (opt->mime_boundary) {
 210                         static char subject_buffer[1024];
 211                         static char buffer[1024];
 212                         snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 213                                  "%s"
 214                                  "MIME-Version: 1.0\n"
 215                                  "Content-Type: multipart/mixed;"
 216                                  " boundary=\"%s%s\"\n"
 217                                  "\n"
 218                                  "This is a multi-part message in MIME "
 219                                  "format.\n"
 220                                  "--%s%s\n"
 221                                  "Content-Type: text/plain; "
 222                                  "charset=UTF-8; format=fixed\n"
 223                                  "Content-Transfer-Encoding: 8bit\n\n",
 224                                  extra_headers ? extra_headers : "",
 225                                  mime_boundary_leader, opt->mime_boundary,
 226                                  mime_boundary_leader, opt->mime_boundary);
 227                         extra_headers = subject_buffer;
 228
 229                         snprintf(buffer, sizeof(buffer) - 1,
 230                                  "--%s%s\n"
 231                                  "Content-Type: text/x-patch;"
 232                                  " name=\"%s.diff\"\n"
 233                                  "Content-Transfer-Encoding: 8bit\n"
 234                                  "Content-Disposition: %s;"
 235                                  " filename=\"%s.diff\"\n\n",
 236                                  mime_boundary_leader, opt->mime_boundary,
 237                                  sha1,
 238                                  opt->no_inline ? "attachment" : "inline",
 239                                  sha1);
 240                         opt->diffopt.stat_sep = buffer;
 241                 }
 242         } else if (opt->commit_format != CMIT_FMT_USERFORMAT) {
 243                 fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
 244                       stdout);
 245                 if (opt->commit_format != CMIT_FMT_ONELINE)
 246                         fputs("commit ", stdout);
 247                 if (opt->left_right) {
 248                         if (commit->object.flags & BOUNDARY)
 249                                 putchar('-');
 250                         else if (commit->object.flags & SYMMETRIC_LEFT)
 251                                 putchar('<');
 252                         else
 253                                 putchar('>');
 254                 }
 255                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 256                       stdout);
 257                 if (opt->parents)
 258                         show_parents(commit, abbrev_commit);
 259                 if (parent)
 260                         printf(" (from %s)",
 261                                diff_unique_abbrev(parent->object.sha1,
 262                                                   abbrev_commit));
 263                 show_decorations(commit);
 264                 printf("%s",
 265                        diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
 266                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 267                 if (opt->reflog_info) {
 268                         show_reflog_message(opt->reflog_info,
 269                                     opt->commit_format == CMIT_FMT_ONELINE,
 270                                     opt->relative_date);
 271                         if (opt->commit_format == CMIT_FMT_ONELINE) {
 272                                 printf("%s", sep);
 273                                 return;
 274                         }
 275                 }
 276         }
 277
 278         /*
 279          * And then the pretty-printed message itself
 280          */
 281         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header,
 282                                   sizeof(this_header), abbrev, subject,
 283                                   extra_headers, opt->relative_date);
 284
 285         if (opt->add_signoff)
 286                 len = append_signoff(this_header, sizeof(this_header), len,
 287                                      opt->add_signoff);
 288         printf("%s%s%s", this_header, extra, sep);
 289 }
 290
 291 int log_tree_diff_flush(struct rev_info *opt)
 292 {
 293         diffcore_std(&opt->diffopt);
 294
 295         if (diff_queue_is_empty()) {
 296                 int saved_fmt = opt->diffopt.output_format;
 297                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 298                 diff_flush(&opt->diffopt);
 299                 opt->diffopt.output_format = saved_fmt;
 300                 return 0;
 301         }
 302
 303         if (opt->loginfo && !opt->no_commit_id) {
 304                 /* When showing a verbose header (i.e. log message),
 305                  * and not in --pretty=oneline format, we would want
 306                  * an extra newline between the end of log and the
 307                  * output for readability.
 308                  */
 309                 show_log(opt, opt->diffopt.msg_sep);
 310                 if (opt->verbose_header &&
 311                     opt->commit_format != CMIT_FMT_ONELINE) {
 312                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 313                         if ((pch & opt->diffopt.output_format) == pch)
 314                                 printf("---");
 315                         putchar('\n');
 316                 }
 317         }
 318         diff_flush(&opt->diffopt);
 319         return 1;
 320 }
 321
 322 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 323 {
 324         unsigned const char *sha1 = commit->object.sha1;
 325
 326         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 327         return !opt->loginfo;
 328 }
 329
 330 /*
 331  * Show the diff of a commit.
 332  *
 333  * Return true if we printed any log info messages
 334  */
 335 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 336 {
 337         int showed_log;
 338         struct commit_list *parents;
 339         unsigned const char *sha1 = commit->object.sha1;
 340
 341         if (!opt->diff)
 342                 return 0;
 343
 344         /* Root commit? */
 345         parents = commit->parents;
 346         if (!parents) {
 347                 if (opt->show_root_diff) {
 348                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 349                         log_tree_diff_flush(opt);
 350                 }
 351                 return !opt->loginfo;
 352         }
 353
 354         /* More than one parent? */
 355         if (parents && parents->next) {
 356                 if (opt->ignore_merges)
 357                         return 0;
 358                 else if (opt->combine_merges)
 359                         return do_diff_combined(opt, commit);
 360
 361                 /* If we show individual diffs, show the parent info */
 362                 log->parent = parents->item;
 363         }
 364
 365         showed_log = 0;
 366         for (;;) {
 367                 struct commit *parent = parents->item;
 368
 369                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 370                 log_tree_diff_flush(opt);
 371
 372                 showed_log |= !opt->loginfo;
 373
 374                 /* Set up the log info for the next parent, if any.. */
 375                 parents = parents->next;
 376                 if (!parents)
 377                         break;
 378                 log->parent = parents->item;
 379                 opt->loginfo = log;
 380         }
 381         return showed_log;
 382 }
 383
 384 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 385 {
 386         struct log_info log;
 387         int shown;
 388
 389         log.commit = commit;
 390         log.parent = NULL;
 391         opt->loginfo = &log;
 392
 393         shown = log_tree_diff(opt, commit, &log);
 394         if (!shown && opt->loginfo && opt->always_show_header) {
 395                 log.parent = NULL;
 396                 show_log(opt, "");
 397                 shown = 1;
 398         }
 399         opt->loginfo = NULL;
 400         return shown;
 401 }