builtin/range-diff.c

   1 #include "cache.h"
   2 #include "builtin.h"
   3 #include "parse-options.h"
   4 #include "range-diff.h"
   5 #include "config.h"
   6
   7 static const char * const builtin_range_diff_usage[] = {
   8 N_("git range-diff [<options>] <old-base>..<old-tip> <new-base>..<new-tip>"),
   9 N_("git range-diff [<options>] <old-tip>...<new-tip>"),
  10 N_("git range-diff [<options>] <base> <old-tip> <new-tip>"),
  11 NULL
  12 };
  13
  14 static struct strbuf *output_prefix_cb(struct diff_options *opt, void *data)
  15 {
  16         return data;
  17 }
  18
  19 int cmd_range_diff(int argc, const char **argv, const char *prefix)
  20 {
  21         int creation_factor = 60;
  22         struct diff_options diffopt = { NULL };
  23         struct option options[] = {
  24                 OPT_INTEGER(0, "creation-factor", &creation_factor,
  25                             N_("Percentage by which creation is weighted")),
  26                 OPT_END()
  27         };
  28         int i, j, res = 0;
  29         struct strbuf four_spaces = STRBUF_INIT;
  30         struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT;
  31
  32         git_config(git_diff_ui_config, NULL);
  33
  34         diff_setup(&diffopt);
  35         diffopt.output_format = DIFF_FORMAT_PATCH;
  36         diffopt.output_prefix = output_prefix_cb;
  37         strbuf_addstr(&four_spaces, "    ");
  38         diffopt.output_prefix_data = &four_spaces;
  39
  40         argc = parse_options(argc, argv, NULL, options,
  41                              builtin_range_diff_usage, PARSE_OPT_KEEP_UNKNOWN |
  42                              PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
  43
  44         for (i = j = 1; i < argc && strcmp("--", argv[i]); ) {
  45                 int c = diff_opt_parse(&diffopt, argv + i, argc - i, prefix);
  46
  47                 if (!c)
  48                         argv[j++] = argv[i++];
  49                 else
  50                         i += c;
  51         }
  52         while (i < argc)
  53                 argv[j++] = argv[i++];
  54         argc = j;
  55         diff_setup_done(&diffopt);
  56
  57         /* Make sure that there are no unparsed options */
  58         argc = parse_options(argc, argv, NULL,
  59                              options + ARRAY_SIZE(options) - 1, /* OPT_END */
  60                              builtin_range_diff_usage, 0);
  61
  62         if (argc == 2) {
  63                 if (!strstr(argv[0], ".."))
  64                         die(_("no .. in range: '%s'"), argv[0]);
  65                 strbuf_addstr(&range1, argv[0]);
  66
  67                 if (!strstr(argv[1], ".."))
  68                         die(_("no .. in range: '%s'"), argv[1]);
  69                 strbuf_addstr(&range2, argv[1]);
  70         } else if (argc == 3) {
  71                 strbuf_addf(&range1, "%s..%s", argv[0], argv[1]);
  72                 strbuf_addf(&range2, "%s..%s", argv[0], argv[2]);
  73         } else if (argc == 1) {
  74                 const char *b = strstr(argv[0], "..."), *a = argv[0];
  75                 int a_len;
  76
  77                 if (!b) {
  78                         error(_("single arg format must be symmetric range"));
  79                         usage_with_options(builtin_range_diff_usage, options);
  80                 }
  81
  82                 a_len = (int)(b - a);
  83                 if (!a_len) {
  84                         a = "HEAD";
  85                         a_len = strlen(a);
  86                 }
  87                 b += 3;
  88                 if (!*b)
  89                         b = "HEAD";
  90                 strbuf_addf(&range1, "%s..%.*s", b, a_len, a);
  91                 strbuf_addf(&range2, "%.*s..%s", a_len, a, b);
  92         } else {
  93                 error(_("need two commit ranges"));
  94                 usage_with_options(builtin_range_diff_usage, options);
  95         }
  96
  97         res = show_range_diff(range1.buf, range2.buf, creation_factor,
  98                               &diffopt);
  99
 100         strbuf_release(&range1);
 101         strbuf_release(&range2);
 102         strbuf_release(&four_spaces);
 103
 104         return res;
 105 }