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 void show_log(struct rev_info *opt, struct log_info *log, const char *sep)
  16 {
  17         static char this_header[16384];
  18         struct commit *commit = log->commit, *parent = log->parent;
  19         int abbrev = opt->diffopt.abbrev;
  20         int abbrev_commit = opt->abbrev_commit ? opt->abbrev : 40;
  21         const char *extra;
  22         int len;
  23
  24         opt->loginfo = NULL;
  25         if (!opt->verbose_header) {
  26                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
  27                 if (opt->parents)
  28                         show_parents(commit, abbrev_commit);
  29                 putchar('\n');
  30                 return;
  31         }
  32
  33         /*
  34          * The "oneline" format has several special cases:
  35          *  - The pretty-printed commit lacks a newline at the end
  36          *    of the buffer, but we do want to make sure that we
  37          *    have a newline there. If the separator isn't already
  38          *    a newline, add an extra one.
  39          *  - unlike other log messages, the one-line format does
  40          *    not have an empty line between entries.
  41          */
  42         extra = "";
  43         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
  44                 extra = "\n";
  45         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
  46                 putchar('\n');
  47         opt->shown_one = 1;
  48
  49         /*
  50          * Print header line of header..
  51          */
  52
  53         if (opt->commit_format == CMIT_FMT_EMAIL)
  54                 printf("From %s  Thu Apr 7 15:13:13 2005\n",
  55                        sha1_to_hex(commit->object.sha1));
  56         else {
  57                 printf("%s%s",
  58                        opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
  59                        diff_unique_abbrev(commit->object.sha1, abbrev_commit));
  60                 if (opt->parents)
  61                         show_parents(commit, abbrev_commit);
  62                 if (parent)
  63                         printf(" (from %s)",
  64                                diff_unique_abbrev(parent->object.sha1,
  65                                                   abbrev_commit));
  66                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
  67         }
  68
  69         /*
  70          * And then the pretty-printed message itself
  71          */
  72         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev);
  73         printf("%s%s%s", this_header, extra, sep);
  74 }
  75
  76 int log_tree_diff_flush(struct rev_info *opt)
  77 {
  78         diffcore_std(&opt->diffopt);
  79
  80         if (diff_queue_is_empty()) {
  81                 int saved_fmt = opt->diffopt.output_format;
  82                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
  83                 diff_flush(&opt->diffopt);
  84                 opt->diffopt.output_format = saved_fmt;
  85                 return 0;
  86         }
  87
  88         if (opt->loginfo && !opt->no_commit_id)
  89                 show_log(opt, opt->loginfo, opt->diffopt.with_stat ? "---\n" : "\n");
  90         diff_flush(&opt->diffopt);
  91         return 1;
  92 }
  93
  94 static int diff_root_tree(struct rev_info *opt,
  95                           const unsigned char *new, const char *base)
  96 {
  97         int retval;
  98         void *tree;
  99         struct tree_desc empty, real;
 100
 101         tree = read_object_with_reference(new, tree_type, &real.size, NULL);
 102         if (!tree)
 103                 die("unable to read root tree (%s)", sha1_to_hex(new));
 104         real.buf = tree;
 105
 106         empty.buf = "";
 107         empty.size = 0;
 108         retval = diff_tree(&empty, &real, base, &opt->diffopt);
 109         free(tree);
 110         log_tree_diff_flush(opt);
 111         return retval;
 112 }
 113
 114 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 115 {
 116         unsigned const char *sha1 = commit->object.sha1;
 117
 118         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 119         return !opt->loginfo;
 120 }
 121
 122 /*
 123  * Show the diff of a commit.
 124  *
 125  * Return true if we printed any log info messages
 126  */
 127 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 128 {
 129         int showed_log;
 130         struct commit_list *parents;
 131         unsigned const char *sha1 = commit->object.sha1;
 132
 133         if (!opt->diff)
 134                 return 0;
 135
 136         /* Root commit? */
 137         parents = commit->parents;
 138         if (!parents) {
 139                 if (opt->show_root_diff)
 140                         diff_root_tree(opt, sha1, "");
 141                 return !opt->loginfo;
 142         }
 143
 144         /* More than one parent? */
 145         if (parents && parents->next) {
 146                 if (opt->ignore_merges)
 147                         return 0;
 148                 else if (opt->combine_merges)
 149                         return do_diff_combined(opt, commit);
 150
 151                 /* If we show individual diffs, show the parent info */
 152                 log->parent = parents->item;
 153         }
 154
 155         showed_log = 0;
 156         for (;;) {
 157                 struct commit *parent = parents->item;
 158
 159                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 160                 log_tree_diff_flush(opt);
 161
 162                 showed_log |= !opt->loginfo;
 163
 164                 /* Set up the log info for the next parent, if any.. */
 165                 parents = parents->next;
 166                 if (!parents)
 167                         break;
 168                 log->parent = parents->item;
 169                 opt->loginfo = log;
 170         }
 171         return showed_log;
 172 }
 173
 174 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 175 {
 176         struct log_info log;
 177         int shown;
 178
 179         log.commit = commit;
 180         log.parent = NULL;
 181         opt->loginfo = &log;
 182
 183         shown = log_tree_diff(opt, commit, &log);
 184         if (!shown && opt->loginfo && opt->always_show_header) {
 185                 log.parent = NULL;
 186                 show_log(opt, opt->loginfo, "");
 187                 shown = 1;
 188         }
 189         opt->loginfo = NULL;
 190         return shown;
 191 }