git.oblomov.eu Git - git/blob - builtin/bisect--helper.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "parse-options.h"
   4 #include "bisect.h"
   5 #include "refs.h"
   6
   7 static const char * const git_bisect_helper_usage[] = {
   8         N_("git bisect--helper --next-all [--no-checkout]"),
   9         N_("git bisect--helper --check-term-format <term> <orig_term>"),
  10         NULL
  11 };
  12
  13 /*
  14  * Check whether the string `term` belongs to the set of strings
  15  * included in the variable arguments.
  16  */
  17 LAST_ARG_MUST_BE_NULL
  18 static int one_of(const char *term, ...)
  19 {
  20         int res = 0;
  21         va_list matches;
  22         const char *match;
  23
  24         va_start(matches, term);
  25         while (!res && (match = va_arg(matches, const char *)))
  26                 res = !strcmp(term, match);
  27         va_end(matches);
  28
  29         return res;
  30 }
  31
  32 static int check_term_format(const char *term, const char *orig_term)
  33 {
  34         int res;
  35         char *new_term = xstrfmt("refs/bisect/%s", term);
  36
  37         res = check_refname_format(new_term, 0);
  38         free(new_term);
  39
  40         if (res)
  41                 return error(_("'%s' is not a valid term"), term);
  42
  43         if (one_of(term, "help", "start", "skip", "next", "reset",
  44                         "visualize", "replay", "log", "run", "terms", NULL))
  45                 return error(_("can't use the builtin command '%s' as a term"), term);
  46
  47         /*
  48          * In theory, nothing prevents swapping completely good and bad,
  49          * but this situation could be confusing and hasn't been tested
  50          * enough. Forbid it for now.
  51          */
  52
  53         if ((strcmp(orig_term, "bad") && one_of(term, "bad", "new", NULL)) ||
  54                  (strcmp(orig_term, "good") && one_of(term, "good", "old", NULL)))
  55                 return error(_("can't change the meaning of the term '%s'"), term);
  56
  57         return 0;
  58 }
  59
  60 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
  61 {
  62         enum {
  63                 NEXT_ALL = 1,
  64                 CHECK_TERM_FMT
  65         } cmdmode = 0;
  66         int no_checkout = 0;
  67         struct option options[] = {
  68                 OPT_CMDMODE(0, "next-all", &cmdmode,
  69                          N_("perform 'git bisect next'"), NEXT_ALL),
  70                 OPT_CMDMODE(0, "check-term-format", &cmdmode,
  71                          N_("check format of the term"), CHECK_TERM_FMT),
  72                 OPT_BOOL(0, "no-checkout", &no_checkout,
  73                          N_("update BISECT_HEAD instead of checking out the current commit")),
  74                 OPT_END()
  75         };
  76
  77         argc = parse_options(argc, argv, prefix, options,
  78                              git_bisect_helper_usage, 0);
  79
  80         if (!cmdmode)
  81                 usage_with_options(git_bisect_helper_usage, options);
  82
  83         switch (cmdmode) {
  84         case NEXT_ALL:
  85                 return bisect_next_all(prefix, no_checkout);
  86         case CHECK_TERM_FMT:
  87                 if (argc != 2)
  88                         return error(_("--check-term-format requires two arguments"));
  89                 return check_term_format(argv[0], argv[1]);
  90         default:
  91                 return error("BUG: unknown subcommand '%d'", cmdmode);
  92         }
  93         return 0;
  94 }