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