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