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         int len;
  13
  14         opt->loginfo = NULL;
  15         if (!opt->verbose_header) {
  16                 puts(sha1_to_hex(commit->object.sha1));
  17                 return;
  18         }
  19
  20         /*
  21          * Whitespace between commit messages, unless we are oneline
  22          */
  23         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
  24                 putchar('\n');
  25         opt->shown_one = 1;
  26
  27         /*
  28          * Print header line of header..
  29          */
  30         printf("%s%s",
  31                 opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
  32                 diff_unique_abbrev(commit->object.sha1, abbrev_commit));
  33         if (parent)
  34                 printf(" (from %s)", diff_unique_abbrev(parent->object.sha1, abbrev_commit));
  35         putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
  36
  37         /*
  38          * And then the pretty-printed message itself
  39          */
  40         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev);
  41         printf("%s%s", this_header, sep);
  42 }
  43
  44 int log_tree_diff_flush(struct rev_info *opt)
  45 {
  46         diffcore_std(&opt->diffopt);
  47
  48         if (diff_queue_is_empty()) {
  49                 int saved_fmt = opt->diffopt.output_format;
  50                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
  51                 diff_flush(&opt->diffopt);
  52                 opt->diffopt.output_format = saved_fmt;
  53                 return 0;
  54         }
  55
  56         if (opt->loginfo && !opt->no_commit_id)
  57                 show_log(opt, opt->loginfo, opt->diffopt.with_stat ? "---\n" : "\n");
  58         diff_flush(&opt->diffopt);
  59         return 1;
  60 }
  61
  62 static int diff_root_tree(struct rev_info *opt,
  63                           const unsigned char *new, const char *base)
  64 {
  65         int retval;
  66         void *tree;
  67         struct tree_desc empty, real;
  68
  69         tree = read_object_with_reference(new, tree_type, &real.size, NULL);
  70         if (!tree)
  71                 die("unable to read root tree (%s)", sha1_to_hex(new));
  72         real.buf = tree;
  73
  74         empty.buf = "";
  75         empty.size = 0;
  76         retval = diff_tree(&empty, &real, base, &opt->diffopt);
  77         free(tree);
  78         log_tree_diff_flush(opt);
  79         return retval;
  80 }
  81
  82 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
  83 {
  84         unsigned const char *sha1 = commit->object.sha1;
  85
  86         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
  87         return !opt->loginfo;
  88 }
  89
  90 /*
  91  * Show the diff of a commit.
  92  *
  93  * Return true if we printed any log info messages
  94  */
  95 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
  96 {
  97         int showed_log;
  98         struct commit_list *parents;
  99         unsigned const char *sha1 = commit->object.sha1;
 100
 101         if (!opt->diff)
 102                 return 0;
 103
 104         /* Root commit? */
 105         parents = commit->parents;
 106         if (!parents) {
 107                 if (opt->show_root_diff)
 108                         diff_root_tree(opt, sha1, "");
 109                 return !opt->loginfo;
 110         }
 111
 112         /* More than one parent? */
 113         if (parents && parents->next) {
 114                 if (opt->ignore_merges)
 115                         return 0;
 116                 else if (opt->combine_merges)
 117                         return do_diff_combined(opt, commit);
 118
 119                 /* If we show individual diffs, show the parent info */
 120                 log->parent = parents->item;
 121         }
 122
 123         showed_log = 0;
 124         for (;;) {
 125                 struct commit *parent = parents->item;
 126
 127                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 128                 log_tree_diff_flush(opt);
 129
 130                 showed_log |= !opt->loginfo;
 131
 132                 /* Set up the log info for the next parent, if any.. */
 133                 parents = parents->next;
 134                 if (!parents)
 135                         break;
 136                 log->parent = parents->item;
 137                 opt->loginfo = log;
 138         }
 139         return showed_log;
 140 }
 141
 142 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 143 {
 144         struct log_info log;
 145
 146         log.commit = commit;
 147         log.parent = NULL;
 148         opt->loginfo = &log;
 149
 150         if (!log_tree_diff(opt, commit, &log) && opt->loginfo && opt->always_show_header) {
 151                 log.parent = NULL;
 152                 show_log(opt, opt->loginfo, "");
 153         }
 154         opt->loginfo = NULL;
 155         return 0;
 156 }