Andrew's git - gitweb.git/blob

db9091e249454e2678ce37fb7c5c5b391e330bcc
   1#include "builtin.h"
   2#include "cache.h"
   3#include "parse-options.h"
   4#include "bisect.h"
   5#include "refs.h"
   6
   7static 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 */
  17LAST_ARG_MUST_BE_NULL
  18static 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
  32static 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
  60int 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}