log-tree.c

   1 #include "cache.h"
   2 #include "diff.h"
   3 #include "commit.h"
   4 #include "log-tree.h"
   5
   6 static void show_parents(struct commit *commit, int abbrev)
   7 {
   8         struct commit_list *p;
   9         for (p = commit->parents; p ; p = p->next) {
  10                 struct commit *parent = p->item;
  11                 printf(" %s", diff_unique_abbrev(parent->object.sha1, abbrev));
  12         }
  13 }
  14
  15 /*
  16  * Search for "^[-A-Za-z]+: [^@]+@" pattern. It usually matches
  17  * Signed-off-by: and Acked-by: lines.
  18  */
  19 static int detect_any_signoff(char *letter, int size)
  20 {
  21         char ch, *cp;
  22         int seen_colon = 0;
  23         int seen_at = 0;
  24         int seen_name = 0;
  25         int seen_head = 0;
  26
  27         cp = letter + size;
  28         while (letter <= --cp && (ch = *cp) == '\n')
  29                 continue;
  30
  31         while (letter <= cp) {
  32                 ch = *cp--;
  33                 if (ch == '\n')
  34                         break;
  35
  36                 if (!seen_at) {
  37                         if (ch == '@')
  38                                 seen_at = 1;
  39                         continue;
  40                 }
  41                 if (!seen_colon) {
  42                         if (ch == '@')
  43                                 return 0;
  44                         else if (ch == ':')
  45                                 seen_colon = 1;
  46                         else
  47                                 seen_name = 1;
  48                         continue;
  49                 }
  50                 if (('A' <= ch && ch <= 'Z') ||
  51                     ('a' <= ch && ch <= 'z') ||
  52                     ch == '-') {
  53                         seen_head = 1;
  54                         continue;
  55                 }
  56                 /* no empty last line doesn't match */
  57                 return 0;
  58         }
  59         return seen_head && seen_name;
  60 }
  61
  62 static int append_signoff(char *buf, int buf_sz, int at, const char *signoff)
  63 {
  64         static const char signed_off_by[] = "Signed-off-by: ";
  65         int signoff_len = strlen(signoff);
  66         int has_signoff = 0;
  67         char *cp = buf;
  68
  69         /* Do we have enough space to add it? */
  70         if (buf_sz - at <= strlen(signed_off_by) + signoff_len + 3)
  71                 return at;
  72
  73         /* First see if we already have the sign-off by the signer */
  74         while ((cp = strstr(cp, signed_off_by))) {
  75
  76                 has_signoff = 1;
  77
  78                 cp += strlen(signed_off_by);
  79                 if (cp + signoff_len >= buf + at)
  80                         break;
  81                 if (strncmp(cp, signoff, signoff_len))
  82                         continue;
  83                 if (!isspace(cp[signoff_len]))
  84                         continue;
  85                 /* we already have him */
  86                 return at;
  87         }
  88
  89         if (!has_signoff)
  90                 has_signoff = detect_any_signoff(buf, at);
  91
  92         if (!has_signoff)
  93                 buf[at++] = '\n';
  94
  95         strcpy(buf + at, signed_off_by);
  96         at += strlen(signed_off_by);
  97         strcpy(buf + at, signoff);
  98         at += signoff_len;
  99         buf[at++] = '\n';
 100         buf[at] = 0;
 101         return at;
 102 }
 103
 104 void show_log(struct rev_info *opt, const char *sep)
 105 {
 106         static char this_header[16384];
 107         struct log_info *log = opt->loginfo;
 108         struct commit *commit = log->commit, *parent = log->parent;
 109         int abbrev = opt->diffopt.abbrev;
 110         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
 111         const char *extra;
 112         int len;
 113         const char *subject = NULL, *extra_headers = opt->extra_headers;
 114
 115         opt->loginfo = NULL;
 116         if (!opt->verbose_header) {
 117                 if (opt->left_right) {
 118                         if (commit->object.flags & BOUNDARY)
 119                                 putchar('-');
 120                         else if (commit->object.flags & SYMMETRIC_LEFT)
 121                                 putchar('<');
 122                         else
 123                                 putchar('>');
 124                 }
 125                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
 126                 if (opt->parents)
 127                         show_parents(commit, abbrev_commit);
 128                 putchar(opt->diffopt.line_termination);
 129                 return;
 130         }
 131
 132         /*
 133          * The "oneline" format has several special cases:
 134          *  - The pretty-printed commit lacks a newline at the end
 135          *    of the buffer, but we do want to make sure that we
 136          *    have a newline there. If the separator isn't already
 137          *    a newline, add an extra one.
 138          *  - unlike other log messages, the one-line format does
 139          *    not have an empty line between entries.
 140          */
 141         extra = "";
 142         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
 143                 extra = "\n";
 144         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
 145                 putchar('\n');
 146         opt->shown_one = 1;
 147
 148         /*
 149          * Print header line of header..
 150          */
 151
 152         if (opt->commit_format == CMIT_FMT_EMAIL) {
 153                 char *sha1 = sha1_to_hex(commit->object.sha1);
 154                 if (opt->total > 0) {
 155                         static char buffer[64];
 156                         snprintf(buffer, sizeof(buffer),
 157                                         "Subject: [PATCH %d/%d] ",
 158                                         opt->nr, opt->total);
 159                         subject = buffer;
 160                 } else if (opt->total == 0)
 161                         subject = "Subject: [PATCH] ";
 162                 else
 163                         subject = "Subject: ";
 164
 165                 printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
 166                 if (opt->message_id)
 167                         printf("Message-Id: <%s>\n", opt->message_id);
 168                 if (opt->ref_message_id)
 169                         printf("In-Reply-To: <%s>\nReferences: <%s>\n",
 170                                opt->ref_message_id, opt->ref_message_id);
 171                 if (opt->mime_boundary) {
 172                         static char subject_buffer[1024];
 173                         static char buffer[1024];
 174                         snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 175                                  "%s"
 176                                  "MIME-Version: 1.0\n"
 177                                  "Content-Type: multipart/mixed;\n"
 178                                  " boundary=\"%s%s\"\n"
 179                                  "\n"
 180                                  "This is a multi-part message in MIME "
 181                                  "format.\n"
 182                                  "--%s%s\n"
 183                                  "Content-Type: text/plain; "
 184                                  "charset=UTF-8; format=fixed\n"
 185                                  "Content-Transfer-Encoding: 8bit\n\n",
 186                                  extra_headers ? extra_headers : "",
 187                                  mime_boundary_leader, opt->mime_boundary,
 188                                  mime_boundary_leader, opt->mime_boundary);
 189                         extra_headers = subject_buffer;
 190
 191                         snprintf(buffer, sizeof(buffer) - 1,
 192                                  "--%s%s\n"
 193                                  "Content-Type: text/x-patch;\n"
 194                                  " name=\"%s.diff\"\n"
 195                                  "Content-Transfer-Encoding: 8bit\n"
 196                                  "Content-Disposition: inline;\n"
 197                                  " filename=\"%s.diff\"\n\n",
 198                                  mime_boundary_leader, opt->mime_boundary,
 199                                  sha1, sha1);
 200                         opt->diffopt.stat_sep = buffer;
 201                 }
 202         } else {
 203                 fputs(diff_get_color(opt->diffopt.color_diff, DIFF_COMMIT),
 204                       stdout);
 205                 if (opt->commit_format != CMIT_FMT_ONELINE)
 206                         fputs("commit ", stdout);
 207                 if (opt->left_right) {
 208                         if (commit->object.flags & BOUNDARY)
 209                                 putchar('-');
 210                         else if (commit->object.flags & SYMMETRIC_LEFT)
 211                                 putchar('<');
 212                         else
 213                                 putchar('>');
 214                 }
 215                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit),
 216                       stdout);
 217                 if (opt->parents)
 218                         show_parents(commit, abbrev_commit);
 219                 if (parent)
 220                         printf(" (from %s)",
 221                                diff_unique_abbrev(parent->object.sha1,
 222                                                   abbrev_commit));
 223                 printf("%s",
 224                        diff_get_color(opt->diffopt.color_diff, DIFF_RESET));
 225                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 226         }
 227
 228         /*
 229          * And then the pretty-printed message itself
 230          */
 231         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header,
 232                                   sizeof(this_header), abbrev, subject,
 233                                   extra_headers, opt->relative_date);
 234
 235         if (opt->add_signoff)
 236                 len = append_signoff(this_header, sizeof(this_header), len,
 237                                      opt->add_signoff);
 238         printf("%s%s%s", this_header, extra, sep);
 239 }
 240
 241 int log_tree_diff_flush(struct rev_info *opt)
 242 {
 243         diffcore_std(&opt->diffopt);
 244
 245         if (diff_queue_is_empty()) {
 246                 int saved_fmt = opt->diffopt.output_format;
 247                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 248                 diff_flush(&opt->diffopt);
 249                 opt->diffopt.output_format = saved_fmt;
 250                 return 0;
 251         }
 252
 253         if (opt->loginfo && !opt->no_commit_id) {
 254                 /* When showing a verbose header (i.e. log message),
 255                  * and not in --pretty=oneline format, we would want
 256                  * an extra newline between the end of log and the
 257                  * output for readability.
 258                  */
 259                 show_log(opt, opt->diffopt.msg_sep);
 260                 if (opt->verbose_header &&
 261                     opt->commit_format != CMIT_FMT_ONELINE) {
 262                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 263                         if ((pch & opt->diffopt.output_format) == pch)
 264                                 printf("---%c", opt->diffopt.line_termination);
 265                         else
 266                                 putchar(opt->diffopt.line_termination);
 267                 }
 268         }
 269         diff_flush(&opt->diffopt);
 270         return 1;
 271 }
 272
 273 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 274 {
 275         unsigned const char *sha1 = commit->object.sha1;
 276
 277         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 278         return !opt->loginfo;
 279 }
 280
 281 /*
 282  * Show the diff of a commit.
 283  *
 284  * Return true if we printed any log info messages
 285  */
 286 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 287 {
 288         int showed_log;
 289         struct commit_list *parents;
 290         unsigned const char *sha1 = commit->object.sha1;
 291
 292         if (!opt->diff)
 293                 return 0;
 294
 295         /* Root commit? */
 296         parents = commit->parents;
 297         if (!parents) {
 298                 if (opt->show_root_diff) {
 299                         diff_root_tree_sha1(sha1, "", &opt->diffopt);
 300                         log_tree_diff_flush(opt);
 301                 }
 302                 return !opt->loginfo;
 303         }
 304
 305         /* More than one parent? */
 306         if (parents && parents->next) {
 307                 if (opt->ignore_merges)
 308                         return 0;
 309                 else if (opt->combine_merges)
 310                         return do_diff_combined(opt, commit);
 311
 312                 /* If we show individual diffs, show the parent info */
 313                 log->parent = parents->item;
 314         }
 315
 316         showed_log = 0;
 317         for (;;) {
 318                 struct commit *parent = parents->item;
 319
 320                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 321                 log_tree_diff_flush(opt);
 322
 323                 showed_log |= !opt->loginfo;
 324
 325                 /* Set up the log info for the next parent, if any.. */
 326                 parents = parents->next;
 327                 if (!parents)
 328                         break;
 329                 log->parent = parents->item;
 330                 opt->loginfo = log;
 331         }
 332         return showed_log;
 333 }
 334
 335 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 336 {
 337         struct log_info log;
 338         int shown;
 339
 340         log.commit = commit;
 341         log.parent = NULL;
 342         opt->loginfo = &log;
 343
 344         shown = log_tree_diff(opt, commit, &log);
 345         if (!shown && opt->loginfo && opt->always_show_header) {
 346                 log.parent = NULL;
 347                 show_log(opt, "");
 348                 shown = 1;
 349         }
 350         opt->loginfo = NULL;
 351         return shown;
 352 }