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