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 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_("color both diff and diff-between-diffs")),
  24                 OPT_END()
  25         };
  26         int i, j, res = 0;
  27         struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT;
  28
  29         git_config(git_diff_ui_config, NULL);
  30
  31         diff_setup(&diffopt);
  32
  33         argc = parse_options(argc, argv, NULL, options,
  34                              builtin_range_diff_usage, PARSE_OPT_KEEP_UNKNOWN |
  35                              PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
  36
  37         for (i = j = 1; i < argc && strcmp("--", argv[i]); ) {
  38                 int c = diff_opt_parse(&diffopt, argv + i, argc - i, prefix);
  39
  40                 if (!c)
  41                         argv[j++] = argv[i++];
  42                 else
  43                         i += c;
  44         }
  45         while (i < argc)
  46                 argv[j++] = argv[i++];
  47         argc = j;
  48         diff_setup_done(&diffopt);
  49
  50         /* Make sure that there are no unparsed options */
  51         argc = parse_options(argc, argv, NULL,
  52                              options + ARRAY_SIZE(options) - 1, /* OPT_END */
  53                              builtin_range_diff_usage, 0);
  54
  55         /* force color when --dual-color was used */
  56         if (!simple_color)
  57                 diffopt.use_color = 1;
  58
  59         if (argc == 2) {
  60                 if (!strstr(argv[0], ".."))
  61                         die(_("no .. in range: '%s'"), argv[0]);
  62                 strbuf_addstr(&range1, argv[0]);
  63
  64                 if (!strstr(argv[1], ".."))
  65                         die(_("no .. in range: '%s'"), argv[1]);
  66                 strbuf_addstr(&range2, argv[1]);
  67         } else if (argc == 3) {
  68                 strbuf_addf(&range1, "%s..%s", argv[0], argv[1]);
  69                 strbuf_addf(&range2, "%s..%s", argv[0], argv[2]);
  70         } else if (argc == 1) {
  71                 const char *b = strstr(argv[0], "..."), *a = argv[0];
  72                 int a_len;
  73
  74                 if (!b) {
  75                         error(_("single arg format must be symmetric range"));
  76                         usage_with_options(builtin_range_diff_usage, options);
  77                 }
  78
  79                 a_len = (int)(b - a);
  80                 if (!a_len) {
  81                         a = "HEAD";
  82                         a_len = strlen(a);
  83                 }
  84                 b += 3;
  85                 if (!*b)
  86                         b = "HEAD";
  87                 strbuf_addf(&range1, "%s..%.*s", b, a_len, a);
  88                 strbuf_addf(&range2, "%.*s..%s", a_len, a, b);
  89         } else {
  90                 error(_("need two commit ranges"));
  91                 usage_with_options(builtin_range_diff_usage, options);
  92         }
  93
  94         res = show_range_diff(range1.buf, range2.buf, creation_factor,
  95                               simple_color < 1, &diffopt);
  96
  97         strbuf_release(&range1);
  98         strbuf_release(&range2);
  99
 100         return res;
 101 }