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         int simple_color = -1;
  24         struct option options[] = {
  25                 OPT_INTEGER(0, "creation-factor", &creation_factor,
  26                             N_("Percentage by which creation is weighted")),
  27                 OPT_BOOL(0, "no-dual-color", &simple_color,
  28                             N_("color both diff and diff-between-diffs")),
  29                 OPT_END()
  30         };
  31         int i, j, res = 0;
  32         struct strbuf four_spaces = STRBUF_INIT;
  33         struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT;
  34
  35         git_config(git_diff_ui_config, NULL);
  36
  37         diff_setup(&diffopt);
  38         diffopt.output_format = DIFF_FORMAT_PATCH;
  39         diffopt.flags.suppress_diff_headers = 1;
  40         diffopt.output_prefix = output_prefix_cb;
  41         strbuf_addstr(&four_spaces, "    ");
  42         diffopt.output_prefix_data = &four_spaces;
  43
  44         argc = parse_options(argc, argv, NULL, options,
  45                              builtin_range_diff_usage, PARSE_OPT_KEEP_UNKNOWN |
  46                              PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
  47
  48         for (i = j = 1; i < argc && strcmp("--", argv[i]); ) {
  49                 int c = diff_opt_parse(&diffopt, argv + i, argc - i, prefix);
  50
  51                 if (!c)
  52                         argv[j++] = argv[i++];
  53                 else
  54                         i += c;
  55         }
  56         while (i < argc)
  57                 argv[j++] = argv[i++];
  58         argc = j;
  59         diff_setup_done(&diffopt);
  60
  61         /* Make sure that there are no unparsed options */
  62         argc = parse_options(argc, argv, NULL,
  63                              options + ARRAY_SIZE(options) - 1, /* OPT_END */
  64                              builtin_range_diff_usage, 0);
  65
  66         if (simple_color < 1) {
  67                 if (!simple_color)
  68                         /* force color when --dual-color was used */
  69                         diffopt.use_color = 1;
  70                 diffopt.flags.dual_color_diffed_diffs = 1;
  71         }
  72
  73         if (argc == 2) {
  74                 if (!strstr(argv[0], ".."))
  75                         die(_("no .. in range: '%s'"), argv[0]);
  76                 strbuf_addstr(&range1, argv[0]);
  77
  78                 if (!strstr(argv[1], ".."))
  79                         die(_("no .. in range: '%s'"), argv[1]);
  80                 strbuf_addstr(&range2, argv[1]);
  81         } else if (argc == 3) {
  82                 strbuf_addf(&range1, "%s..%s", argv[0], argv[1]);
  83                 strbuf_addf(&range2, "%s..%s", argv[0], argv[2]);
  84         } else if (argc == 1) {
  85                 const char *b = strstr(argv[0], "..."), *a = argv[0];
  86                 int a_len;
  87
  88                 if (!b) {
  89                         error(_("single arg format must be symmetric range"));
  90                         usage_with_options(builtin_range_diff_usage, options);
  91                 }
  92
  93                 a_len = (int)(b - a);
  94                 if (!a_len) {
  95                         a = "HEAD";
  96                         a_len = strlen(a);
  97                 }
  98                 b += 3;
  99                 if (!*b)
 100                         b = "HEAD";
 101                 strbuf_addf(&range1, "%s..%.*s", b, a_len, a);
 102                 strbuf_addf(&range2, "%.*s..%s", a_len, a, b);
 103         } else {
 104                 error(_("need two commit ranges"));
 105                 usage_with_options(builtin_range_diff_usage, options);
 106         }
 107
 108         res = show_range_diff(range1.buf, range2.buf, creation_factor,
 109                               &diffopt);
 110
 111         strbuf_release(&range1);
 112         strbuf_release(&range2);
 113         strbuf_release(&four_spaces);
 114
 115         return res;
 116 }