builtin/check-ref-format.c

   1 /*
   2  * GIT - The information manager from hell
   3  */
   4
   5 #include "cache.h"
   6 #include "refs.h"
   7 #include "builtin.h"
   8 #include "setup.h"
   9 #include "strbuf.h"
  10
  11 static const char builtin_check_ref_format_usage[] =
  12 "git check-ref-format [--normalize] [<options>] <refname>\n"
  13 "   or: git check-ref-format --branch <branchname-shorthand>";
  14
  15 /*
  16  * Return a copy of refname but with leading slashes removed and runs
  17  * of adjacent slashes replaced with single slashes.
  18  *
  19  * This function is similar to normalize_path_copy(), but stripped down
  20  * to meet check_ref_format's simpler needs.
  21  */
  22 static char *collapse_slashes(const char *refname)
  23 {
  24         char *ret = xmallocz(strlen(refname));
  25         char ch;
  26         char prev = '/';
  27         char *cp = ret;
  28
  29         while ((ch = *refname++) != '\0') {
  30                 if (prev == '/' && ch == prev)
  31                         continue;
  32
  33                 *cp++ = ch;
  34                 prev = ch;
  35         }
  36         *cp = '\0';
  37         return ret;
  38 }
  39
  40 static int check_ref_format_branch(const char *arg)
  41 {
  42         struct strbuf sb = STRBUF_INIT;
  43         const char *name;
  44         int nongit;
  45
  46         setup_git_directory_gently(&nongit);
  47         if (strbuf_check_branch_ref(&sb, arg) ||
  48             !skip_prefix(sb.buf, "refs/heads/", &name))
  49                 die("'%s' is not a valid branch name", arg);
  50         printf("%s\n", name);
  51         strbuf_release(&sb);
  52         return 0;
  53 }
  54
  55 int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
  56 {
  57         int i;
  58         int normalize = 0;
  59         int flags = 0;
  60         const char *refname;
  61         char *to_free = NULL;
  62         int ret = 1;
  63
  64         BUG_ON_NON_EMPTY_PREFIX(prefix);
  65
  66         if (argc == 2 && !strcmp(argv[1], "-h"))
  67                 usage(builtin_check_ref_format_usage);
  68
  69         if (argc == 3 && !strcmp(argv[1], "--branch"))
  70                 return check_ref_format_branch(argv[2]);
  71
  72         for (i = 1; i < argc && argv[i][0] == '-'; i++) {
  73                 if (!strcmp(argv[i], "--normalize") || !strcmp(argv[i], "--print"))
  74                         normalize = 1;
  75                 else if (!strcmp(argv[i], "--allow-onelevel"))
  76                         flags |= REFNAME_ALLOW_ONELEVEL;
  77                 else if (!strcmp(argv[i], "--no-allow-onelevel"))
  78                         flags &= ~REFNAME_ALLOW_ONELEVEL;
  79                 else if (!strcmp(argv[i], "--refspec-pattern"))
  80                         flags |= REFNAME_REFSPEC_PATTERN;
  81                 else
  82                         usage(builtin_check_ref_format_usage);
  83         }
  84         if (! (i == argc - 1))
  85                 usage(builtin_check_ref_format_usage);
  86
  87         refname = argv[i];
  88         if (normalize)
  89                 refname = to_free = collapse_slashes(refname);
  90         if (check_refname_format(refname, flags))
  91                 goto cleanup;
  92         if (normalize)
  93                 printf("%s\n", refname);
  94
  95         ret = 0;
  96 cleanup:
  97         free(to_free);
  98         return ret;
  99 }