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         char* subject = NULL;
  24
  25         opt->loginfo = NULL;
  26         if (!opt->verbose_header) {
  27                 fputs(diff_unique_abbrev(commit->object.sha1, abbrev_commit), stdout);
  28                 if (opt->parents)
  29                         show_parents(commit, abbrev_commit);
  30                 putchar('\n');
  31                 return;
  32         }
  33
  34         /*
  35          * The "oneline" format has several special cases:
  36          *  - The pretty-printed commit lacks a newline at the end
  37          *    of the buffer, but we do want to make sure that we
  38          *    have a newline there. If the separator isn't already
  39          *    a newline, add an extra one.
  40          *  - unlike other log messages, the one-line format does
  41          *    not have an empty line between entries.
  42          */
  43         extra = "";
  44         if (*sep != '\n' && opt->commit_format == CMIT_FMT_ONELINE)
  45                 extra = "\n";
  46         if (opt->shown_one && opt->commit_format != CMIT_FMT_ONELINE)
  47                 putchar('\n');
  48         opt->shown_one = 1;
  49
  50         /*
  51          * Print header line of header..
  52          */
  53
  54         if (opt->commit_format == CMIT_FMT_EMAIL) {
  55                 if (opt->total > 0) {
  56                         static char buffer[64];
  57                         snprintf(buffer, sizeof(buffer),
  58                                         "Subject: [PATCH %d/%d] ",
  59                                         opt->nr, opt->total);
  60                         subject = buffer;
  61                 } else if (opt->total == 0)
  62                         subject = "Subject: [PATCH] ";
  63                 else
  64                         subject = "Subject: ";
  65
  66                 printf("From %s  Thu Apr 7 15:13:13 2005\n",
  67                        sha1_to_hex(commit->object.sha1));
  68         } else {
  69                 printf("%s%s",
  70                        opt->commit_format == CMIT_FMT_ONELINE ? "" : "commit ",
  71                        diff_unique_abbrev(commit->object.sha1, abbrev_commit));
  72                 if (opt->parents)
  73                         show_parents(commit, abbrev_commit);
  74                 if (parent)
  75                         printf(" (from %s)",
  76                                diff_unique_abbrev(parent->object.sha1,
  77                                                   abbrev_commit));
  78                 putchar(opt->commit_format == CMIT_FMT_ONELINE ? ' ' : '\n');
  79         }
  80
  81         /*
  82          * And then the pretty-printed message itself
  83          */
  84         len = pretty_print_commit(opt->commit_format, commit, ~0u, this_header, sizeof(this_header), abbrev, subject);
  85         printf("%s%s%s", this_header, extra, sep);
  86 }
  87
  88 int log_tree_diff_flush(struct rev_info *opt)
  89 {
  90         diffcore_std(&opt->diffopt);
  91
  92         if (diff_queue_is_empty()) {
  93                 int saved_fmt = opt->diffopt.output_format;
  94                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
  95                 diff_flush(&opt->diffopt);
  96                 opt->diffopt.output_format = saved_fmt;
  97                 return 0;
  98         }
  99
 100         if (opt->loginfo && !opt->no_commit_id)
 101                 show_log(opt, opt->loginfo, opt->diffopt.with_stat ? "---\n" : "\n");
 102         diff_flush(&opt->diffopt);
 103         return 1;
 104 }
 105
 106 static int diff_root_tree(struct rev_info *opt,
 107                           const unsigned char *new, const char *base)
 108 {
 109         int retval;
 110         void *tree;
 111         struct tree_desc empty, real;
 112
 113         tree = read_object_with_reference(new, tree_type, &real.size, NULL);
 114         if (!tree)
 115                 die("unable to read root tree (%s)", sha1_to_hex(new));
 116         real.buf = tree;
 117
 118         empty.buf = "";
 119         empty.size = 0;
 120         retval = diff_tree(&empty, &real, base, &opt->diffopt);
 121         free(tree);
 122         log_tree_diff_flush(opt);
 123         return retval;
 124 }
 125
 126 static int do_diff_combined(struct rev_info *opt, struct commit *commit)
 127 {
 128         unsigned const char *sha1 = commit->object.sha1;
 129
 130         diff_tree_combined_merge(sha1, opt->dense_combined_merges, opt);
 131         return !opt->loginfo;
 132 }
 133
 134 /*
 135  * Show the diff of a commit.
 136  *
 137  * Return true if we printed any log info messages
 138  */
 139 static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log_info *log)
 140 {
 141         int showed_log;
 142         struct commit_list *parents;
 143         unsigned const char *sha1 = commit->object.sha1;
 144
 145         if (!opt->diff)
 146                 return 0;
 147
 148         /* Root commit? */
 149         parents = commit->parents;
 150         if (!parents) {
 151                 if (opt->show_root_diff)
 152                         diff_root_tree(opt, sha1, "");
 153                 return !opt->loginfo;
 154         }
 155
 156         /* More than one parent? */
 157         if (parents && parents->next) {
 158                 if (opt->ignore_merges)
 159                         return 0;
 160                 else if (opt->combine_merges)
 161                         return do_diff_combined(opt, commit);
 162
 163                 /* If we show individual diffs, show the parent info */
 164                 log->parent = parents->item;
 165         }
 166
 167         showed_log = 0;
 168         for (;;) {
 169                 struct commit *parent = parents->item;
 170
 171                 diff_tree_sha1(parent->object.sha1, sha1, "", &opt->diffopt);
 172                 log_tree_diff_flush(opt);
 173
 174                 showed_log |= !opt->loginfo;
 175
 176                 /* Set up the log info for the next parent, if any.. */
 177                 parents = parents->next;
 178                 if (!parents)
 179                         break;
 180                 log->parent = parents->item;
 181                 opt->loginfo = log;
 182         }
 183         return showed_log;
 184 }
 185
 186 int log_tree_commit(struct rev_info *opt, struct commit *commit)
 187 {
 188         struct log_info log;
 189         int shown;
 190
 191         log.commit = commit;
 192         log.parent = NULL;
 193         opt->loginfo = &log;
 194
 195         shown = log_tree_diff(opt, commit, &log);
 196         if (!shown && opt->loginfo && opt->always_show_header) {
 197                 log.parent = NULL;
 198                 show_log(opt, opt->loginfo, "");
 199                 shown = 1;
 200         }
 201         opt->loginfo = NULL;
 202         return shown;
 203 }