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 #include "revision.h"
   7
   8 static const char * const builtin_range_diff_usage[] = {
   9 N_("git range-diff [<options>] <old-base>..<old-tip> <new-base>..<new-tip>"),
  10 N_("git range-diff [<options>] <old-tip>...<new-tip>"),
  11 N_("git range-diff [<options>] <base> <old-tip> <new-tip>"),
  12 NULL
  13 };
  14
  15 int cmd_range_diff(int argc, const char **argv, const char *prefix)
  16 {
  17         struct diff_options diffopt = { NULL };
  18         struct strvec other_arg = STRVEC_INIT;
  19         struct range_diff_options range_diff_opts = {
  20                 .creation_factor = RANGE_DIFF_CREATION_FACTOR_DEFAULT,
  21                 .diffopt = &diffopt,
  22                 .other_arg = &other_arg
  23         };
  24         int simple_color = -1, left_only = 0, right_only = 0;
  25         struct option range_diff_options[] = {
  26                 OPT_INTEGER(0, "creation-factor",
  27                             &range_diff_opts.creation_factor,
  28                             N_("Percentage by which creation is weighted")),
  29                 OPT_BOOL(0, "no-dual-color", &simple_color,
  30                             N_("use simple diff colors")),
  31                 OPT_PASSTHRU_ARGV(0, "notes", &other_arg,
  32                                   N_("notes"), N_("passed to 'git log'"),
  33                                   PARSE_OPT_OPTARG),
  34                 OPT_BOOL(0, "left-only", &left_only,
  35                          N_("only emit output related to the first range")),
  36                 OPT_BOOL(0, "right-only", &right_only,
  37                          N_("only emit output related to the second range")),
  38                 OPT_END()
  39         };
  40         struct option *options;
  41         int res = 0;
  42         struct strbuf range1 = STRBUF_INIT, range2 = STRBUF_INIT;
  43
  44         git_config(git_diff_ui_config, NULL);
  45
  46         repo_diff_setup(the_repository, &diffopt);
  47
  48         options = parse_options_concat(range_diff_options, diffopt.parseopts);
  49         argc = parse_options(argc, argv, prefix, options,
  50                              builtin_range_diff_usage, 0);
  51
  52         diff_setup_done(&diffopt);
  53
  54         /* force color when --dual-color was used */
  55         if (!simple_color)
  56                 diffopt.use_color = 1;
  57
  58         if (argc == 2) {
  59                 if (!is_range_diff_range(argv[0]))
  60                         die(_("not a commit range: '%s'"), argv[0]);
  61                 strbuf_addstr(&range1, argv[0]);
  62
  63                 if (!is_range_diff_range(argv[1]))
  64                         die(_("not a commit range: '%s'"), argv[1]);
  65                 strbuf_addstr(&range2, argv[1]);
  66         } else if (argc == 3) {
  67                 strbuf_addf(&range1, "%s..%s", argv[0], argv[1]);
  68                 strbuf_addf(&range2, "%s..%s", argv[0], argv[2]);
  69         } else if (argc == 1) {
  70                 const char *b = strstr(argv[0], "..."), *a = argv[0];
  71                 int a_len;
  72
  73                 if (!b) {
  74                         error(_("single arg format must be symmetric range"));
  75                         usage_with_options(builtin_range_diff_usage, options);
  76                 }
  77
  78                 a_len = (int)(b - a);
  79                 if (!a_len) {
  80                         a = "HEAD";
  81                         a_len = strlen(a);
  82                 }
  83                 b += 3;
  84                 if (!*b)
  85                         b = "HEAD";
  86                 strbuf_addf(&range1, "%s..%.*s", b, a_len, a);
  87                 strbuf_addf(&range2, "%.*s..%s", a_len, a, b);
  88         } else {
  89                 error(_("need two commit ranges"));
  90                 usage_with_options(builtin_range_diff_usage, options);
  91         }
  92         FREE_AND_NULL(options);
  93
  94         range_diff_opts.dual_color = simple_color < 1;
  95         range_diff_opts.left_only = left_only;
  96         range_diff_opts.right_only = right_only;
  97         res = show_range_diff(range1.buf, range2.buf, &range_diff_opts);
  98
  99         strvec_clear(&other_arg);
 100         strbuf_release(&range1);
 101         strbuf_release(&range2);
 102
 103         return res;
 104 }