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