builtin/range-diff.c

   1 #include "cache.h"
   2 #include "builtin.h"
   3 #include "parse-options.h"
   4 #include "range-diff.h"
   5
   6 static const char * const builtin_range_diff_usage[] = {
   7 N_("git range-diff [<options>] <old-base>..<old-tip> <new-base>..<new-tip>"),
   8 N_("git range-diff [<options>] <old-tip>...<new-tip>"),
   9 N_("git range-diff [<options>] <base> <old-tip> <new-tip>"),
  10 NULL
  11 };
  12
  13 int cmd_range_diff(int argc, const char **argv, const char *prefix)
  14 {
  15         int creation_factor = 60;
  16         struct option options[] = {
  17                 OPT_INTEGER(0, "creation-factor", &creation_factor,
  18                             N_("Percentage by which creation is weighted")),
  19                 OPT_END()
  20         };
  21         int res = 0;
  22         struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT;
  23
  24         argc = parse_options(argc, argv, NULL, options,
  25                              builtin_range_diff_usage, 0);
  26
  27         if (argc == 2) {
  28                 if (!strstr(argv[0], ".."))
  29                         die(_("no .. in range: '%s'"), argv[0]);
  30                 strbuf_addstr(&range1, argv[0]);
  31
  32                 if (!strstr(argv[1], ".."))
  33                         die(_("no .. in range: '%s'"), argv[1]);
  34                 strbuf_addstr(&range2, argv[1]);
  35         } else if (argc == 3) {
  36                 strbuf_addf(&range1, "%s..%s", argv[0], argv[1]);
  37                 strbuf_addf(&range2, "%s..%s", argv[0], argv[2]);
  38         } else if (argc == 1) {
  39                 const char *b = strstr(argv[0], "..."), *a = argv[0];
  40                 int a_len;
  41
  42                 if (!b) {
  43                         error(_("single arg format must be symmetric range"));
  44                         usage_with_options(builtin_range_diff_usage, options);
  45                 }
  46
  47                 a_len = (int)(b - a);
  48                 if (!a_len) {
  49                         a = "HEAD";
  50                         a_len = strlen(a);
  51                 }
  52                 b += 3;
  53                 if (!*b)
  54                         b = "HEAD";
  55                 strbuf_addf(&range1, "%s..%.*s", b, a_len, a);
  56                 strbuf_addf(&range2, "%.*s..%s", a_len, a, b);
  57         } else {
  58                 error(_("need two commit ranges"));
  59                 usage_with_options(builtin_range_diff_usage, options);
  60         }
  61
  62         res = show_range_diff(range1.buf, range2.buf, creation_factor);
  63
  64         strbuf_release(&range1);
  65         strbuf_release(&range2);
  66
  67         return res;
  68 }