log-tree.c

   1
   2 #include "cache.h"
   3 #include "diff.h"
   4 #include "commit.h"
   5 #include "log-tree.h"
   6
   7 void show_log(struct rev_info *opt, struct log_info *log, const char *sep)
   8 {
   9         static char this_header[16384];
  10         struct commit *commit = log->commit, *parent = log->parent;
  11         int abbrev = opt->diffopt.abbrev;
  12         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
  13         int len;
  14
  15         opt->loginfo = NULL;
  16         if (!opt->verbose_header) {
  17                 puts(sha1_to_hex(commit->object.sha1));
  18                 return;
  19         }
  20
  21         /*
  22          * Whitespace between commit messages, unless we are oneline
  23          */
  24         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
  25                 putchar('\n');
  26         opt->shown_one = 1;
  27
  28         /*
  29          * Print header line of header..
  30          */
  31         printf("%s%s",
  32                 opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
  33                 diff_unique_abbrev(commit->object.sha1, abbrev_commit));
  34         if (parent)
  35                 printf(" (from %s)", diff_unique_abbrev(parent->object.sha1, abbrev_commit));
  36         putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
  37
  38         /*
  39          * And then the pretty-printed message itself
  40          */
  41         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev);
  42         printf("%s%s", this_header, sep);
  43 }
  44
  45 int log_tree_diff_flush(struct rev_info *opt)
  46 {
  47         diffcore_std(&opt->diffopt);
  48
  49         if (diff_queue_is_empty()) {
  50                 int saved_fmt = opt->diffopt.output_format;
  51                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
  52                 diff_flush(&opt->diffopt);
  53                 opt->diffopt.output_format = saved_fmt;
  54                 return 0;
  55         }
  56
  57         if (opt->loginfo && !opt->no_commit_id)
  58                 show_log(opt, opt->loginfo, "\n");
  59         diff_flush(&opt->diffopt);
  60         return 1;
  61 }
  62
  63 static int diff_root_tree(struct rev_info *opt,
  64                           const unsigned char *new, const char *base)
  65 {
  66         int retval;
  67         void *tree;
  68         struct tree_desc empty, real;
  69
  70         tree = read_object_with_reference(new, tree_type, &real.size, NULL);
  71         if (!tree)
  72                 die("unable to read root tree (%s)", sha1_to_hex(new));
  73         real.buf = tree;
  74
  75         empty.buf = "";
  76         empty.size = 0;
  77         retval = diff_tree(&empty, &real, base, &opt->diffopt);
  78         free(tree);
  79         log_tree_diff_flush(opt);
  80         return retval;
  81 }
  82
  83 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
  84 {
  85         unsigned const char *sha1 = commit->object.sha1;
  86
  87         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
  88         return !opt->loginfo;
  89 }
  90
  91 /*
  92  * Show the diff of a commit.
  93  *
  94  * Return true if we printed any log info messages
  95  */
  96 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
  97 {
  98         int showed_log;
  99         struct commit_list *parents;
 100         unsigned const char *sha1 = commit->object.sha1;
 101
 102         if (!opt->diff)
 103                 return 0;
 104
 105         /* Root commit? */
 106         parents = commit->parents;
 107         if (!parents) {
 108                 if (opt->show_root_diff)
 109                         diff_root_tree(opt, sha1, "");
 110                 return !opt->loginfo;
 111         }
 112
 113         /* More than one parent? */
 114         if (parents && parents->next) {
 115                 if (opt->ignore_merges)
 116                         return 0;
 117                 else if (opt->combine_merges)
 118                         return do_diff_combined(opt, commit);
 119
 120                 /* If we show individual diffs, show the parent info */
 121                 log->parent = parents->item;
 122         }
 123
 124         showed_log = 0;
 125         for (;;) {
 126                 struct commit *parent = parents->item;
 127
 128                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 129                 log_tree_diff_flush(opt);
 130
 131                 showed_log |= !opt->loginfo;
 132
 133                 /* Set up the log info for the next parent, if any.. */
 134                 parents = parents->next;
 135                 if (!parents)
 136                         break;
 137                 log->parent = parents->item;
 138                 opt->loginfo = log;
 139         }
 140         return showed_log;
 141 }
 142
 143 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 144 {
 145         struct log_info log;
 146
 147         log.commit = commit;
 148         log.parent = NULL;
 149         opt->loginfo = &log;
 150
 151         if (!log_tree_diff(opt, commit, &log) && opt->loginfo && opt->always_show_header) {
 152                 log.parent = NULL;
 153                 show_log(opt, opt->loginfo, "");
 154         }
 155         opt->loginfo = NULL;
 156         return 0;
 157 }