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