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 static void show_parents(struct commit *commit, int abbrev)
   8 {
   9         struct commit_list *p;
  10         for (p = commit->parents; p ; p = p->next) {
  11                 struct commit *parent = p->item;
  12                 printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
  13         }
  14 }
  15
  16 /*
  17  * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
  18  * Signed-off-by: and Acked-by: lines.
  19  */
  20 static int detect_any_signoff(char *letter, int size)
  21 {
  22         char ch, *cp;
  23         int seen_colon = 0;
  24         int seen_at = 0;
  25         int seen_name = 0;
  26         int seen_head = 0;
  27
  28         cp = letter + size;
  29         while (letter <= --cp && (ch = *cp) == '\n')
  30                 continue;
  31
  32         while (letter <= cp) {
  33                 ch = *cp--;
  34                 if (ch == '\n')
  35                         break;
  36
  37                 if (!seen_at) {
  38                         if (ch == '@')
  39                                 seen_at = 1;
  40                         continue;
  41                 }
  42                 if (!seen_colon) {
  43                         if (ch == '@')
  44                                 return 0;
  45                         else if (ch == ':')
  46                                 seen_colon = 1;
  47                         else
  48                                 seen_name = 1;
  49                         continue;
  50                 }
  51                 if (('A' <= ch && ch <= 'Z') ||
  52                     ('a' <= ch && ch <= 'z') ||
  53                     ch == '-') {
  54                         seen_head = 1;
  55                         continue;
  56                 }
  57                 /* no empty last line doesn't match */
  58                 return 0;
  59         }
  60         return seen_head && seen_name;
  61 }
  62
  63 static int append_signoff(char *buf, int buf_sz, int at, const char *signoff)
  64 {
  65         static const char signed_off_by[] = "Signed-off-by: ";
  66         int signoff_len = strlen(signoff);
  67         int has_signoff = 0;
  68         char *cp = buf;
  69
  70         /* Do we have enough space to add it? */
  71         if (buf_sz - at <= strlen(signed_off_by) + signoff_len + 3)
  72                 return at;
  73
  74         /* First see if we already have the sign-off by the signer */
  75         while ((cp = strstr(cp, signed_off_by))) {
  76
  77                 has_signoff = 1;
  78
  79                 cp += strlen(signed_off_by);
  80                 if (cp + signoff_len >= buf + at)
  81                         break;
  82                 if (strncmp(cp, signoff, signoff_len))
  83                         continue;
  84                 if (!isspace(cp[signoff_len]))
  85                         continue;
  86                 /* we already have him */
  87                 return at;
  88         }
  89
  90         if (!has_signoff)
  91                 has_signoff = detect_any_signoff(buf, at);
  92
  93         if (!has_signoff)
  94                 buf[at++] = '\n';
  95
  96         strcpy(buf + at, signed_off_by);
  97         at += strlen(signed_off_by);
  98         strcpy(buf + at, signoff);
  99         at += signoff_len;
 100         buf[at++] = '\n';
 101         buf[at] = 0;
 102         return at;
 103 }
 104
 105 static unsigned int digits_in_number(unsigned int number)
 106 {
 107         unsigned int i = 10, result = 1;
 108         while (i <= number) {
 109                 i *= 10;
 110                 result++;
 111         }
 112         return result;
 113 }
 114
 115 void show_log(struct rev_info *opt, const char *sep)
 116 {
 117         static char this_header[16384];
 118         struct log_info *log = opt->loginfo;
 119         struct commit *commit = log->commit, *parent = log->parent;
 120         int abbrev = opt->diffopt.abbrev;
 121         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 122         const char *extra;
 123         int len;
 124         const char *subject = NULL, *extra_headers = opt->extra_headers;
 125
 126         opt->loginfo = NULL;
 127         if (!opt->verbose_header) {
 128                 if (opt->left_right) {
 129                         if (commit->object.flags & BOUNDARY)
 130                                 putchar('-');
 131                         else if (commit->object.flags & SYMMETRIC_LEFT)
 132                                 putchar('<');
 133                         else
 134                                 putchar('>');
 135                 }
 136                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 137                 if (opt->parents)
 138                         show_parents(commit, abbrev_commit);
 139                 putchar(opt->diffopt.line_termination);
 140                 return;
 141         }
 142
 143         /*
 144          * The "oneline" format has several special cases:
 145          *  - The pretty-printed commit lacks a newline at the end
 146          *    of the buffer, but we do want to make sure that we
 147          *    have a newline there. If the separator isn't already
 148          *    a newline, add an extra one.
 149          *  - unlike other log messages, the one-line format does
 150          *    not have an empty line between entries.
 151          */
 152         extra = "";
 153         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
 154                 extra = "\n";
 155         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
 156                 putchar(opt->diffopt.line_termination);
 157         opt->shown_one = 1;
 158
 159         /*
 160          * Print header line of header..
 161          */
 162
 163         if (opt->commit_format == CMIT_FMT_EMAIL) {
 164                 char *sha1 = sha1_to_hex(commit->object.sha1);
 165                 if (opt->total > 0) {
 166                         static char buffer[64];
 167                         snprintf(buffer, sizeof(buffer),
 168                                         "Subject: [PATCH %0*d/%d] ",
 169                                         digits_in_number(opt->total),
 170                                         opt->nr, opt->total);
 171                         subject = buffer;
 172                 } else if (opt->total == 0)
 173                         subject = "Subject: [PATCH] ";
 174                 else
 175                         subject = "Subject: ";
 176
 177                 printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
 178                 if (opt->message_id)
 179                         printf("Message-Id: <%s>\n", opt->message_id);
 180                 if (opt->ref_message_id)
 181                         printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 182                                opt->ref_message_id, opt->ref_message_id);
 183                 if (opt->mime_boundary) {
 184                         static char subject_buffer[1024];
 185                         static char buffer[1024];
 186                         snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 187                                  "%s"
 188                                  "MIME-Version: 1.0\n"
 189                                  "Content-Type: multipart/mixed;\n"
 190                                  " boundary=\"%s%s\"\n"
 191                                  "\n"
 192                                  "This is a multi-part message in MIME "
 193                                  "format.\n"
 194                                  "--%s%s\n"
 195                                  "Content-Type: text/plain; "
 196                                  "charset=UTF-8; format=fixed\n"
 197                                  "Content-Transfer-Encoding: 8bit\n\n",
 198                                  extra_headers ? extra_headers : "",
 199                                  mime_boundary_leader, opt->mime_boundary,
 200                                  mime_boundary_leader, opt->mime_boundary);
 201                         extra_headers = subject_buffer;
 202
 203                         snprintf(buffer, sizeof(buffer) - 1,
 204                                  "--%s%s\n"
 205                                  "Content-Type: text/x-patch;\n"
 206                                  " name=\"%s.diff\"\n"
 207                                  "Content-Transfer-Encoding: 8bit\n"
 208                                  "Content-Disposition: inline;\n"
 209                                  " filename=\"%s.diff\"\n\n",
 210                                  mime_boundary_leader, opt->mime_boundary,
 211                                  sha1, sha1);
 212                         opt->diffopt.stat_sep = buffer;
 213                 }
 214         } else {
 215                 fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
 216                       stdout);
 217                 if (opt->commit_format != CMIT_FMT_ONELINE)
 218                         fputs("commit ", stdout);
 219                 if (opt->left_right) {
 220                         if (commit->object.flags & BOUNDARY)
 221                                 putchar('-');
 222                         else if (commit->object.flags & SYMMETRIC_LEFT)
 223                                 putchar('<');
 224                         else
 225                                 putchar('>');
 226                 }
 227                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 228                       stdout);
 229                 if (opt->parents)
 230                         show_parents(commit, abbrev_commit);
 231                 if (parent)
 232                         printf(" (from %s)",
 233                                diff_unique_abbrev(parent->object.sha1,
 234                                                   abbrev_commit));
 235                 printf("%s",
 236                        diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
 237                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 238                 if (opt->reflog_info) {
 239                         show_reflog_message(opt->reflog_info,
 240                                     opt->commit_format == CMIT_FMT_ONELINE,
 241                                     opt->relative_date);
 242                         if (opt->commit_format == CMIT_FMT_ONELINE) {
 243                                 printf("%s", sep);
 244                                 return;
 245                         }
 246                 }
 247         }
 248
 249         /*
 250          * And then the pretty-printed message itself
 251          */
 252         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header,
 253                                   sizeof(this_header), abbrev, subject,
 254                                   extra_headers, opt->relative_date);
 255
 256         if (opt->add_signoff)
 257                 len = append_signoff(this_header, sizeof(this_header), len,
 258                                      opt->add_signoff);
 259         printf("%s%s%s", this_header, extra, sep);
 260 }
 261
 262 int log_tree_diff_flush(struct rev_info *opt)
 263 {
 264         diffcore_std(&opt->diffopt);
 265
 266         if (diff_queue_is_empty()) {
 267                 int saved_fmt = opt->diffopt.output_format;
 268                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 269                 diff_flush(&opt->diffopt);
 270                 opt->diffopt.output_format = saved_fmt;
 271                 return 0;
 272         }
 273
 274         if (opt->loginfo && !opt->no_commit_id) {
 275                 /* When showing a verbose header (i.e. log message),
 276                  * and not in --pretty=oneline format, we would want
 277                  * an extra newline between the end of log and the
 278                  * output for readability.
 279                  */
 280                 show_log(opt, opt->diffopt.msg_sep);
 281                 if (opt->verbose_header &&
 282                     opt->commit_format != CMIT_FMT_ONELINE) {
 283                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 284                         if ((pch & opt->diffopt.output_format) == pch)
 285                                 printf("---");
 286                         putchar('\n');
 287                 }
 288         }
 289         diff_flush(&opt->diffopt);
 290         return 1;
 291 }
 292
 293 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 294 {
 295         unsigned const char *sha1 = commit->object.sha1;
 296
 297         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 298         return !opt->loginfo;
 299 }
 300
 301 /*
 302  * Show the diff of a commit.
 303  *
 304  * Return true if we printed any log info messages
 305  */
 306 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 307 {
 308         int showed_log;
 309         struct commit_list *parents;
 310         unsigned const char *sha1 = commit->object.sha1;
 311
 312         if (!opt->diff)
 313                 return 0;
 314
 315         /* Root commit? */
 316         parents = commit->parents;
 317         if (!parents) {
 318                 if (opt->show_root_diff) {
 319                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 320                         log_tree_diff_flush(opt);
 321                 }
 322                 return !opt->loginfo;
 323         }
 324
 325         /* More than one parent? */
 326         if (parents && parents->next) {
 327                 if (opt->ignore_merges)
 328                         return 0;
 329                 else if (opt->combine_merges)
 330                         return do_diff_combined(opt, commit);
 331
 332                 /* If we show individual diffs, show the parent info */
 333                 log->parent = parents->item;
 334         }
 335
 336         showed_log = 0;
 337         for (;;) {
 338                 struct commit *parent = parents->item;
 339
 340                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 341                 log_tree_diff_flush(opt);
 342
 343                 showed_log |= !opt->loginfo;
 344
 345                 /* Set up the log info for the next parent, if any.. */
 346                 parents = parents->next;
 347                 if (!parents)
 348                         break;
 349                 log->parent = parents->item;
 350                 opt->loginfo = log;
 351         }
 352         return showed_log;
 353 }
 354
 355 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 356 {
 357         struct log_info log;
 358         int shown;
 359
 360         log.commit = commit;
 361         log.parent = NULL;
 362         opt->loginfo = &log;
 363
 364         shown = log_tree_diff(opt, commit, &log);
 365         if (!shown && opt->loginfo && opt->always_show_header) {
 366                 log.parent = NULL;
 367                 show_log(opt, "");
 368                 shown = 1;
 369         }
 370         opt->loginfo = NULL;
 371         return shown;
 372 }