log-tree.c

   1 #include "cache.h"
   2 #include "diff.h"
   3 #include "commit.h"
   4 #include "log-tree.h"
   5
   6 void show_log(struct rev_info *opt, struct log_info *log, const char *sep)
   7 {
   8         static char this_header[16384];
   9         struct commit *commit = log->commit, *parent = log->parent;
  10         int abbrev = opt->diffopt.abbrev;
  11         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
  12         const char *extra;
  13         int len;
  14         char* subject = NULL;
  15
  16         opt->loginfo = NULL;
  17         if (!opt->verbose_header) {
  18                 puts(sha1_to_hex(commit->object.sha1));
  19                 return;
  20         }
  21
  22         /*
  23          * The "oneline" format has several special cases:
  24          *  - The pretty-printed commit lacks a newline at the end
  25          *    of the buffer, but we do want to make sure that we
  26          *    have a newline there. If the separator isn't already
  27          *    a newline, add an extra one.
  28          *  - unlike other log messages, the one-line format does
  29          *    not have an empty line between entries.
  30          */
  31         extra = "";
  32         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
  33                 extra = "\n";
  34         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
  35                 putchar('\n');
  36         opt->shown_one = 1;
  37
  38         /*
  39          * Print header line of header..
  40          */
  41
  42         if (opt->commit_format == CMIT_FMT_EMAIL) {
  43                 if (opt->total > 0) {
  44                         static char buffer[64];
  45                         snprintf(buffer, sizeof(buffer),
  46                                         "Subject: [PATCH %d/%d] ",
  47                                         opt->nr, opt->total);
  48                         subject = buffer;
  49                 } else
  50                         subject = "Subject: [PATCH] ";
  51                 printf("From %s  Thu Apr 7 15:13:13 2005\n",
  52                        sha1_to_hex(commit->object.sha1));
  53         } else {
  54                 printf("%s%s",
  55                        opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
  56                        diff_unique_abbrev(commit->object.sha1, abbrev_commit));
  57                 if (parent)
  58                         printf(" (from %s)",
  59                                diff_unique_abbrev(parent->object.sha1,
  60                                                   abbrev_commit));
  61                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
  62         }
  63
  64         /*
  65          * And then the pretty-printed message itself
  66          */
  67         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev, subject);
  68         printf("%s%s%s", this_header, extra, sep);
  69 }
  70
  71 int log_tree_diff_flush(struct rev_info *opt)
  72 {
  73         diffcore_std(&opt->diffopt);
  74
  75         if (diff_queue_is_empty()) {
  76                 int saved_fmt = opt->diffopt.output_format;
  77                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
  78                 diff_flush(&opt->diffopt);
  79                 opt->diffopt.output_format = saved_fmt;
  80                 return 0;
  81         }
  82
  83         if (opt->loginfo && !opt->no_commit_id)
  84                 show_log(opt, opt->loginfo, opt->diffopt.with_stat ? "---\n" : "\n");
  85         diff_flush(&opt->diffopt);
  86         return 1;
  87 }
  88
  89 static int diff_root_tree(struct rev_info *opt,
  90                           const unsigned char *new, const char *base)
  91 {
  92         int retval;
  93         void *tree;
  94         struct tree_desc empty, real;
  95
  96         tree = read_object_with_reference(new, tree_type, &real.size, NULL);
  97         if (!tree)
  98                 die("unable to read root tree (%s)", sha1_to_hex(new));
  99         real.buf = tree;
 100
 101         empty.buf = "";
 102         empty.size = 0;
 103         retval = diff_tree(&empty, &real, base, &opt->diffopt);
 104         free(tree);
 105         log_tree_diff_flush(opt);
 106         return retval;
 107 }
 108
 109 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 110 {
 111         unsigned const char *sha1 = commit->object.sha1;
 112
 113         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 114         return !opt->loginfo;
 115 }
 116
 117 /*
 118  * Show the diff of a commit.
 119  *
 120  * Return true if we printed any log info messages
 121  */
 122 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 123 {
 124         int showed_log;
 125         struct commit_list *parents;
 126         unsigned const char *sha1 = commit->object.sha1;
 127
 128         if (!opt->diff)
 129                 return 0;
 130
 131         /* Root commit? */
 132         parents = commit->parents;
 133         if (!parents) {
 134                 if (opt->show_root_diff)
 135                         diff_root_tree(opt, sha1, "");
 136                 return !opt->loginfo;
 137         }
 138
 139         /* More than one parent? */
 140         if (parents && parents->next) {
 141                 if (opt->ignore_merges)
 142                         return 0;
 143                 else if (opt->combine_merges)
 144                         return do_diff_combined(opt, commit);
 145
 146                 /* If we show individual diffs, show the parent info */
 147                 log->parent = parents->item;
 148         }
 149
 150         showed_log = 0;
 151         for (;;) {
 152                 struct commit *parent = parents->item;
 153
 154                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 155                 log_tree_diff_flush(opt);
 156
 157                 showed_log |= !opt->loginfo;
 158
 159                 /* Set up the log info for the next parent, if any.. */
 160                 parents = parents->next;
 161                 if (!parents)
 162                         break;
 163                 log->parent = parents->item;
 164                 opt->loginfo = log;
 165         }
 166         return showed_log;
 167 }
 168
 169 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 170 {
 171         struct log_info log;
 172         int shown;
 173
 174         log.commit = commit;
 175         log.parent = NULL;
 176         opt->loginfo = &log;
 177
 178         shown = log_tree_diff(opt, commit, &log);
 179         if (!shown && opt->loginfo && opt->always_show_header) {
 180                 log.parent = NULL;
 181                 show_log(opt, opt->loginfo, "");
 182                 shown = 1;
 183         }
 184         opt->loginfo = NULL;
 185         return shown;
 186 }