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 int cmd_range_diff(int argc, const char **argv, const char *prefix)
  15 {
  16         int creation_factor = RANGE_DIFF_CREATION_FACTOR_DEFAULT;
  17         struct diff_options diffopt = { NULL };
  18         int simple_color = -1;
  19         struct option range_diff_options[] = {
  20                 OPT_INTEGER(0, "creation-factor", &creation_factor,
  21                             N_("Percentage by which creation is weighted")),
  22                 OPT_BOOL(0, "no-dual-color", &simple_color,
  23                             N_("use simple diff colors")),
  24                 OPT_END()
  25         };
  26         struct option *options;
  27         int res = 0;
  28         struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT;
  29
  30         git_config(git_diff_ui_config, NULL);
  31
  32         repo_diff_setup(the_repository, &diffopt);
  33
  34         options = parse_options_concat(range_diff_options, diffopt.parseopts);
  35         argc = parse_options(argc, argv, NULL, options,
  36                              builtin_range_diff_usage, 0);
  37
  38         diff_setup_done(&diffopt);
  39
  40         /* force color when --dual-color was used */
  41         if (!simple_color)
  42                 diffopt.use_color = 1;
  43
  44         if (argc == 2) {
  45                 if (!strstr(argv[0], ".."))
  46                         die(_("no .. in range: '%s'"), argv[0]);
  47                 strbuf_addstr(&range1, argv[0]);
  48
  49                 if (!strstr(argv[1], ".."))
  50                         die(_("no .. in range: '%s'"), argv[1]);
  51                 strbuf_addstr(&range2, argv[1]);
  52         } else if (argc == 3) {
  53                 strbuf_addf(&range1, "%s..%s", argv[0], argv[1]);
  54                 strbuf_addf(&range2, "%s..%s", argv[0], argv[2]);
  55         } else if (argc == 1) {
  56                 const char *b = strstr(argv[0], "..."), *a = argv[0];
  57                 int a_len;
  58
  59                 if (!b) {
  60                         error(_("single arg format must be symmetric range"));
  61                         usage_with_options(builtin_range_diff_usage, options);
  62                 }
  63
  64                 a_len = (int)(b - a);
  65                 if (!a_len) {
  66                         a = "HEAD";
  67                         a_len = strlen(a);
  68                 }
  69                 b += 3;
  70                 if (!*b)
  71                         b = "HEAD";
  72                 strbuf_addf(&range1, "%s..%.*s", b, a_len, a);
  73                 strbuf_addf(&range2, "%.*s..%s", a_len, a, b);
  74         } else {
  75                 error(_("need two commit ranges"));
  76                 usage_with_options(builtin_range_diff_usage, options);
  77         }
  78         FREE_AND_NULL(options);
  79
  80         res = show_range_diff(range1.buf, range2.buf, creation_factor,
  81                               simple_color < 1, &diffopt);
  82
  83         strbuf_release(&range1);
  84         strbuf_release(&range2);
  85
  86         return res;
  87 }