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 + 2)
  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         strcpy(buf + at, signed_off_by);
  38         at += strlen(signed_off_by);
  39         strcpy(buf + at, signoff);
  40         at += signoff_len;
  41         buf[at++] = '\n';
  42         buf[at] = 0;
  43         return at;
  44 }
  45
  46 void show_log(struct rev_info *opt, const char *sep)
  47 {
  48         static char this_header[16384];
  49         struct log_info *log = opt->loginfo;
  50         struct commit *commit = log->commit, *parent = log->parent;
  51         int abbrev = opt->diffopt.abbrev;
  52         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
  53         const char *extra;
  54         int len;
  55         const char *subject = NULL, *extra_headers = opt->extra_headers;
  56
  57         opt->loginfo = NULL;
  58         if (!opt->verbose_header) {
  59                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
  60                 if (opt->parents)
  61                         show_parents(commit, abbrev_commit);
  62                 putchar('\n');
  63                 return;
  64         }
  65
  66         /*
  67          * The "oneline" format has several special cases:
  68          *  - The pretty-printed commit lacks a newline at the end
  69          *    of the buffer, but we do want to make sure that we
  70          *    have a newline there. If the separator isn't already
  71          *    a newline, add an extra one.
  72          *  - unlike other log messages, the one-line format does
  73          *    not have an empty line between entries.
  74          */
  75         extra = "";
  76         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
  77                 extra = "\n";
  78         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
  79                 putchar('\n');
  80         opt->shown_one = 1;
  81
  82         /*
  83          * Print header line of header..
  84          */
  85
  86         if (opt->commit_format == CMIT_FMT_EMAIL) {
  87                 char *sha1 = sha1_to_hex(commit->object.sha1);
  88                 if (opt->total > 0) {
  89                         static char buffer[64];
  90                         snprintf(buffer, sizeof(buffer),
  91                                         "Subject: [PATCH %d/%d] ",
  92                                         opt->nr, opt->total);
  93                         subject = buffer;
  94                 } else if (opt->total == 0)
  95                         subject = "Subject: [PATCH] ";
  96                 else
  97                         subject = "Subject: ";
  98
  99                 printf("From %s Mon Sep 17 00:00:00 2001\n", sha1);
 100                 if (opt->mime_boundary) {
 101                         static char subject_buffer[1024];
 102                         static char buffer[1024];
 103                         snprintf(subject_buffer, sizeof(subject_buffer) - 1,
 104                                  "%s"
 105                                  "MIME-Version: 1.0\n"
 106                                  "Content-Type: multipart/mixed;\n"
 107                                  " boundary=\"%s%s\"\n"
 108                                  "\n"
 109                                  "This is a multi-part message in MIME "
 110                                  "format.\n"
 111                                  "--%s%s\n"
 112                                  "Content-Type: text/plain; "
 113                                  "charset=UTF-8; format=fixed\n"
 114                                  "Content-Transfer-Encoding: 8bit\n\n",
 115                                  extra_headers ? extra_headers : "",
 116                                  mime_boundary_leader, opt->mime_boundary,
 117                                  mime_boundary_leader, opt->mime_boundary);
 118                         extra_headers = subject_buffer;
 119
 120                         snprintf(buffer, sizeof(buffer) - 1,
 121                                  "--%s%s\n"
 122                                  "Content-Type: text/x-patch;\n"
 123                                  " name=\"%s.diff\"\n"
 124                                  "Content-Transfer-Encoding: 8bit\n"
 125                                  "Content-Disposition: inline;\n"
 126                                  " filename=\"%s.diff\"\n\n",
 127                                  mime_boundary_leader, opt->mime_boundary,
 128                                  sha1, sha1);
 129                         opt->diffopt.stat_sep = buffer;
 130                 }
 131         } else {
 132                 printf("%s%s",
 133                        opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
 134                        diff_unique_abbrev(commit->object.sha1, abbrev_commit));
 135                 if (opt->parents)
 136                         show_parents(commit, abbrev_commit);
 137                 if (parent)
 138                         printf(" (from %s)",
 139                                diff_unique_abbrev(parent->object.sha1,
 140                                                   abbrev_commit));
 141                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
 142         }
 143
 144         /*
 145          * And then the pretty-printed message itself
 146          */
 147         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev, subject, extra_headers);
 148
 149         if (opt->add_signoff)
 150                 len = append_signoff(this_header, sizeof(this_header), len,
 151                                      opt->add_signoff);
 152         printf("%s%s%s", this_header, extra, sep);
 153 }
 154
 155 int log_tree_diff_flush(struct rev_info *opt)
 156 {
 157         diffcore_std(&opt->diffopt);
 158
 159         if (diff_queue_is_empty()) {
 160                 int saved_fmt = opt->diffopt.output_format;
 161                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
 162                 diff_flush(&opt->diffopt);
 163                 opt->diffopt.output_format = saved_fmt;
 164                 return 0;
 165         }
 166
 167         if (opt->loginfo && !opt->no_commit_id) {
 168                 /* When showing a verbose header (i.e. log message),
 169                  * and not in --pretty=oneline format, we would want
 170                  * an extra newline between the end of log and the
 171                  * output for readability.
 172                  */
 173                 show_log(opt, opt->diffopt.msg_sep);
 174                 if (opt->verbose_header &&
 175                     opt->commit_format != CMIT_FMT_ONELINE) {
 176                         int pch = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
 177                         if ((pch & opt->diffopt.output_format) == pch)
 178                                 printf("---%c", opt->diffopt.line_termination);
 179                         else
 180                                 putchar(opt->diffopt.line_termination);
 181                 }
 182         }
 183         diff_flush(&opt->diffopt);
 184         return 1;
 185 }
 186
 187 static int diff_root_tree(struct rev_info *opt,
 188                           const unsigned char *new, const char *base)
 189 {
 190         int retval;
 191         void *tree;
 192         struct tree_desc empty, real;
 193
 194         tree = read_object_with_reference(new, tree_type, &real.size, NULL);
 195         if (!tree)
 196                 die("unable to read root tree (%s)", sha1_to_hex(new));
 197         real.buf = tree;
 198
 199         empty.buf = "";
 200         empty.size = 0;
 201         retval = diff_tree(&empty, &real, base, &opt->diffopt);
 202         free(tree);
 203         log_tree_diff_flush(opt);
 204         return retval;
 205 }
 206
 207 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 208 {
 209         unsigned const char *sha1 = commit->object.sha1;
 210
 211         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 212         return !opt->loginfo;
 213 }
 214
 215 /*
 216  * Show the diff of a commit.
 217  *
 218  * Return true if we printed any log info messages
 219  */
 220 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 221 {
 222         int showed_log;
 223         struct commit_list *parents;
 224         unsigned const char *sha1 = commit->object.sha1;
 225
 226         if (!opt->diff)
 227                 return 0;
 228
 229         /* Root commit? */
 230         parents = commit->parents;
 231         if (!parents) {
 232                 if (opt->show_root_diff)
 233                         diff_root_tree(opt, sha1, "");
 234                 return !opt->loginfo;
 235         }
 236
 237         /* More than one parent? */
 238         if (parents && parents->next) {
 239                 if (opt->ignore_merges)
 240                         return 0;
 241                 else if (opt->combine_merges)
 242                         return do_diff_combined(opt, commit);
 243
 244                 /* If we show individual diffs, show the parent info */
 245                 log->parent = parents->item;
 246         }
 247
 248         showed_log = 0;
 249         for (;;) {
 250                 struct commit *parent = parents->item;
 251
 252                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 253                 log_tree_diff_flush(opt);
 254
 255                 showed_log |= !opt->loginfo;
 256
 257                 /* Set up the log info for the next parent, if any.. */
 258                 parents = parents->next;
 259                 if (!parents)
 260                         break;
 261                 log->parent = parents->item;
 262                 opt->loginfo = log;
 263         }
 264         return showed_log;
 265 }
 266
 267 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 268 {
 269         struct log_info log;
 270         int shown;
 271
 272         log.commit = commit;
 273         log.parent = NULL;
 274         opt->loginfo = &log;
 275
 276         shown = log_tree_diff(opt, commit, &log);
 277         if (!shown && opt->loginfo && opt->always_show_header) {
 278                 log.parent = NULL;
 279                 show_log(opt, "");
 280                 shown = 1;
 281         }
 282         opt->loginfo = NULL;
 283         return shown;
 284 }