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-rw-r--r--builtin/check-ref-format.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/builtin/check-ref-format.c b/builtin/check-ref-format.c
new file mode 100644
index 0000000000..eac499450f
--- /dev/null
+++ b/builtin/check-ref-format.c
@@ -0,0 +1,88 @@
+/*
+ * GIT - The information manager from hell
+ */
+
+#include "cache.h"
+#include "refs.h"
+#include "builtin.h"
+#include "strbuf.h"
+
+static const char builtin_check_ref_format_usage[] =
+"git check-ref-format [--normalize] [<options>] <refname>\n"
+" or: git check-ref-format --branch <branchname-shorthand>";
+
+/*
+ * Return a copy of refname but with leading slashes removed and runs
+ * of adjacent slashes replaced with single slashes.
+ *
+ * This function is similar to normalize_path_copy(), but stripped down
+ * to meet check_ref_format's simpler needs.
+ */
+static char *collapse_slashes(const char *refname)
+{
+ char *ret = xmallocz(strlen(refname));
+ char ch;
+ char prev = '/';
+ char *cp = ret;
+
+ while ((ch = *refname++) != '\0') {
+ if (prev == '/' && ch == prev)
+ continue;
+
+ *cp++ = ch;
+ prev = ch;
+ }
+ *cp = '\0';
+ return ret;
+}
+
+static int check_ref_format_branch(const char *arg)
+{
+ struct strbuf sb = STRBUF_INIT;
+ int nongit;
+
+ setup_git_directory_gently(&nongit);
+ if (strbuf_check_branch_ref(&sb, arg))
+ die("'%s' is not a valid branch name", arg);
+ printf("%s\n", sb.buf + 11);
+ return 0;
+}
+
+int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
+{
+ int i;
+ int normalize = 0;
+ int flags = 0;
+ const char *refname;
+
+ if (argc == 2 && !strcmp(argv[1], "-h"))
+ usage(builtin_check_ref_format_usage);
+
+ if (argc == 3 && !strcmp(argv[1], "--branch"))
+ return check_ref_format_branch(argv[2]);
+
+ for (i = 1; i < argc && argv[i][0] == '-'; i++) {
+ if (!strcmp(argv[i], "--normalize") || !strcmp(argv[i], "--print"))
+ normalize = 1;
+ else if (!strcmp(argv[i], "--allow-onelevel"))
+ flags |= REFNAME_ALLOW_ONELEVEL;
+ else if (!strcmp(argv[i], "--no-allow-onelevel"))
+ flags &= ~REFNAME_ALLOW_ONELEVEL;
+ else if (!strcmp(argv[i], "--refspec-pattern"))
+ flags |= REFNAME_REFSPEC_PATTERN;
+ else
+ usage(builtin_check_ref_format_usage);
+ }
+ if (! (i == argc - 1))
+ usage(builtin_check_ref_format_usage);
+
+ refname = argv[i];
+ if (normalize)
+ refname = collapse_slashes(refname);
+ if (check_refname_format(refname, flags))
+ return 1;
+ if (normalize)
+ printf("%s\n", refname);
+
+ return 0;
+}