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] <refname>\n"
  12 "   or: git check-ref-format --branch <branchname-shorthand>";
  13
  14 /*
  15  * Replace each run of adjacent slashes in src with a single slash,
  16  * 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 = '\0';
  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 int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
  37 {
  38         if (argc == 2 && !strcmp(argv[1], "-h"))
  39                 usage(builtin_check_ref_format_usage);
  40
  41         if (argc == 3 && !strcmp(argv[1], "--branch")) {
  42                 struct strbuf sb = STRBUF_INIT;
  43
  44                 if (strbuf_check_branch_ref(&sb, argv[2]))
  45                         die("'%s' is not a valid branch name", argv[2]);
  46                 printf("%s\n", sb.buf + 11);
  47                 exit(0);
  48         }
  49         if (argc == 3 && !strcmp(argv[1], "--print")) {
  50                 char *refname = xmalloc(strlen(argv[2]) + 1);
  51
  52                 if (check_ref_format(argv[2]))
  53                         exit(1);
  54                 collapse_slashes(refname, argv[2]);
  55                 printf("%s\n", refname);
  56                 exit(0);
  57         }
  58         if (argc != 2)
  59                 usage(builtin_check_ref_format_usage);
  60         return !!check_ref_format(argv[1]);
  61 }