git.oblomov.eu Git - git/blob - 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 [--print] [options] <refname>\n"
  12 "   or: git check-ref-format --branch <branchname-shorthand>";
  13
  14 /*
  15  * Remove leading slashes and replace each run of adjacent slashes in
  16  * src with a single slash, and write the result to dst.
  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 void collapse_slashes(char *dst, const char *src)
  22 {
  23         char ch;
  24         char prev = '/';
  25
  26         while ((ch = *src++) != '\0') {
  27                 if (prev == '/' && ch == prev)
  28                         continue;
  29
  30                 *dst++ = ch;
  31                 prev = ch;
  32         }
  33         *dst = '\0';
  34 }
  35
  36 static int check_ref_format_branch(const char *arg)
  37 {
  38         struct strbuf sb = STRBUF_INIT;
  39         int nongit;
  40
  41         setup_git_directory_gently(&nongit);
  42         if (strbuf_check_branch_ref(&sb, arg))
  43                 die("'%s' is not a valid branch name", arg);
  44         printf("%s\n", sb.buf + 11);
  45         return 0;
  46 }
  47
  48 static void refname_format_print(const char *arg)
  49 {
  50         char *refname = xmalloc(strlen(arg) + 1);
  51
  52         collapse_slashes(refname, arg);
  53         printf("%s\n", refname);
  54 }
  55
  56 #define REFNAME_ALLOW_ONELEVEL 1
  57 #define REFNAME_REFSPEC_PATTERN 2
  58
  59 int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
  60 {
  61         int i;
  62         int print = 0;
  63         int flags = 0;
  64
  65         if (argc == 2 && !strcmp(argv[1], "-h"))
  66                 usage(builtin_check_ref_format_usage);
  67
  68         if (argc == 3 && !strcmp(argv[1], "--branch"))
  69                 return check_ref_format_branch(argv[2]);
  70
  71         for (i = 1; i < argc && argv[i][0] == '-'; i++) {
  72                 if (!strcmp(argv[i], "--print"))
  73                         print = 1;
  74                 else if (!strcmp(argv[i], "--allow-onelevel"))
  75                         flags |= REFNAME_ALLOW_ONELEVEL;
  76                 else if (!strcmp(argv[i], "--no-allow-onelevel"))
  77                         flags &= ~REFNAME_ALLOW_ONELEVEL;
  78                 else if (!strcmp(argv[i], "--refspec-pattern"))
  79                         flags |= REFNAME_REFSPEC_PATTERN;
  80                 else
  81                         usage(builtin_check_ref_format_usage);
  82         }
  83         if (! (i == argc - 1))
  84                 usage(builtin_check_ref_format_usage);
  85
  86         switch (check_ref_format(argv[i])) {
  87         case CHECK_REF_FORMAT_OK:
  88                 break;
  89         case CHECK_REF_FORMAT_ERROR:
  90                 return 1;
  91         case CHECK_REF_FORMAT_ONELEVEL:
  92                 if (!(flags & REFNAME_ALLOW_ONELEVEL))
  93                         return 1;
  94                 else
  95                         break;
  96         case CHECK_REF_FORMAT_WILDCARD:
  97                 if (!(flags & REFNAME_REFSPEC_PATTERN))
  98                         return 1;
  99                 else
 100                         break;
 101         default:
 102                 die("internal error: unexpected value from check_ref_format()");
 103         }
 104
 105         if (print)
 106                 refname_format_print(argv[i]);
 107
 108         return 0;
 109 }