log-tree.c

   1 #include "cache.h"
   2 #include "diff.h"
   3 #include "commit.h"
   4 #include "log-tree.h"
   5
   6 void init_log_tree_opt(struct log_tree_opt *opt)
   7 {
   8         memset(opt, 0, sizeof *opt);
   9         opt->ignore_merges = 1;
  10         opt->header_prefix = "";
  11         opt->commit_format = CMIT_FMT_RAW;
  12         diff_setup(&opt->diffopt);
  13 }
  14
  15 int log_tree_opt_parse(struct log_tree_opt *opt, const char **av, int ac)
  16 {
  17         const char *arg;
  18         int cnt = diff_opt_parse(&opt->diffopt, av, ac);
  19         if (0 < cnt)
  20                 return cnt;
  21         arg = *av;
  22         if (!strcmp(arg, "-r"))
  23                 opt->diffopt.recursive = 1;
  24         else if (!strcmp(arg, "-t")) {
  25                 opt->diffopt.recursive = 1;
  26                 opt->diffopt.tree_in_recursive = 1;
  27         }
  28         else if (!strcmp(arg, "-m"))
  29                 opt->ignore_merges = 0;
  30         else if (!strcmp(arg, "-c"))
  31                 opt->combine_merges = 1;
  32         else if (!strcmp(arg, "--cc")) {
  33                 opt->dense_combined_merges = 1;
  34                 opt->combine_merges = 1;
  35         }
  36         else if (!strcmp(arg, "-v")) {
  37                 opt->verbose_header = 1;
  38                 opt->header_prefix = "diff-tree ";
  39         }
  40         else if (!strncmp(arg, "--pretty", 8)) {
  41                 opt->verbose_header = 1;
  42                 opt->header_prefix = "diff-tree ";
  43                 opt->commit_format = get_commit_format(arg+8);
  44         }
  45         else if (!strcmp(arg, "--root"))
  46                 opt->show_root_diff = 1;
  47         else if (!strcmp(arg, "--no-commit-id"))
  48                 opt->no_commit_id = 1;
  49         else if (!strcmp(arg, "--always"))
  50                 opt->always_show_header = 1;
  51         else
  52                 return 0;
  53         return 1;
  54 }
  55
  56 int log_tree_diff_flush(struct log_tree_opt *opt)
  57 {
  58         diffcore_std(&opt->diffopt);
  59         if (diff_queue_is_empty()) {
  60                 int saved_fmt = opt->diffopt.output_format;
  61                 opt->diffopt.output_format = DIFF_FORMAT_NO_OUTPUT;
  62                 diff_flush(&opt->diffopt);
  63                 opt->diffopt.output_format = saved_fmt;
  64                 return 0;
  65         }
  66         if (opt->header) {
  67                 if (!opt->no_commit_id)
  68                         printf("%s%c", opt->header,
  69                                opt->diffopt.line_termination);
  70                 opt->header = NULL;
  71         }
  72         diff_flush(&opt->diffopt);
  73         return 1;
  74 }
  75
  76 static int diff_root_tree(struct log_tree_opt *opt,
  77                           const unsigned char *new, const char *base)
  78 {
  79         int retval;
  80         void *tree;
  81         struct tree_desc empty, real;
  82
  83         tree = read_object_with_reference(new, tree_type, &real.size, NULL);
  84         if (!tree)
  85                 die("unable to read root tree (%s)", sha1_to_hex(new));
  86         real.buf = tree;
  87
  88         empty.buf = "";
  89         empty.size = 0;
  90         retval = diff_tree(&empty, &real, base, &opt->diffopt);
  91         free(tree);
  92         log_tree_diff_flush(opt);
  93         return retval;
  94 }
  95
  96 static const char *generate_header(struct log_tree_opt *opt,
  97                                    const unsigned char *commit_sha1,
  98                                    const unsigned char *parent_sha1,
  99                                    const struct commit *commit)
 100 {
 101         static char this_header[16384];
 102         int offset;
 103         unsigned long len;
 104         int abbrev = opt->diffopt.abbrev;
 105         const char *msg = commit->buffer;
 106
 107         if (!opt->verbose_header)
 108                 return sha1_to_hex(commit_sha1);
 109
 110         len = strlen(msg);
 111
 112         offset = sprintf(this_header, "%s%s ",
 113                          opt->header_prefix,
 114                          diff_unique_abbrev(commit_sha1, abbrev));
 115         if (commit_sha1 != parent_sha1)
 116                 offset += sprintf(this_header + offset, "(from %s)\n",
 117                                   parent_sha1
 118                                   ? diff_unique_abbrev(parent_sha1, abbrev)
 119                                   : "root");
 120         else
 121                 offset += sprintf(this_header + offset, "(from parents)\n");
 122         offset += pretty_print_commit(opt->commit_format, commit, len,
 123                                       this_header + offset,
 124                                       sizeof(this_header) - offset, abbrev);
 125         if (opt->always_show_header) {
 126                 puts(this_header);
 127                 return NULL;
 128         }
 129         return this_header;
 130 }
 131
 132 static int do_diff_combined(struct log_tree_opt *opt, struct commit *commit)
 133 {
 134         unsigned const char *sha1 = commit->object.sha1;
 135
 136         opt->header = generate_header(opt, sha1, sha1, commit);
 137         opt->header = diff_tree_combined_merge(sha1, opt->header,
 138                                                 opt->dense_combined_merges,
 139                                                 &opt->diffopt);
 140         if (!opt->header && opt->verbose_header)
 141                 opt->header_prefix = "\ndiff-tree ";
 142         return 0;
 143 }
 144
 145 int log_tree_commit(struct log_tree_opt *opt, struct commit *commit)
 146 {
 147         struct commit_list *parents;
 148         unsigned const char *sha1 = commit->object.sha1;
 149
 150         /* Root commit? */
 151         if (opt->show_root_diff && !commit->parents) {
 152                 opt->header = generate_header(opt, sha1, NULL, commit);
 153                 diff_root_tree(opt, sha1, "");
 154         }
 155
 156         /* More than one parent? */
 157         if (commit->parents && commit->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
 164         for (parents = commit->parents; parents; parents = parents->next) {
 165                 struct commit *parent = parents->item;
 166                 unsigned const char *psha1 = parent->object.sha1;
 167                 opt->header = generate_header(opt, sha1, psha1, commit);
 168                 diff_tree_sha1(psha1, sha1, "", &opt->diffopt);
 169                 log_tree_diff_flush(opt);
 170
 171                 if (!opt->header && opt->verbose_header)
 172                         opt->header_prefix = "\ndiff-tree ";
 173         }
 174         return 0;
 175 }