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  * 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 int check_ref_format_print(const char *arg)
  49 {
  50         char *refname = xmalloc(strlen(arg) + 1);
  51
  52         if (check_ref_format(arg))
  53                 return 1;
  54         collapse_slashes(refname, arg);
  55         printf("%s\n", refname);
  56         return 0;
  57 }
  58
  59 int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
  60 {
  61         if (argc == 2 && !strcmp(argv[1], "-h"))
  62                 usage(builtin_check_ref_format_usage);
  63
  64         if (argc == 3 && !strcmp(argv[1], "--branch"))
  65                 return check_ref_format_branch(argv[2]);
  66         if (argc == 3 && !strcmp(argv[1], "--print"))
  67                 return check_ref_format_print(argv[2]);
  68         if (argc != 2)
  69                 usage(builtin_check_ref_format_usage);
  70         return !!check_ref_format(argv[1]);
  71 }