ref/refname: Add refname validation

1 files changed, 30 insertions, 0 deletions

diff --git a/ref/refname/options.go b/ref/refname/options.go
new file mode 100644
index 00000000..5ae81541
--- /dev/null
+++ b/ref/refname/options.go
@@ -0,0 +1,30 @@
+package refname
+
+import "fmt"
+
+// Options controls Git refname validation.
+type Options struct {
+	// AllowOneLevel permits one-component refnames like HEAD.
+	AllowOneLevel bool
+
+	// RefspecPattern permits one '*' anywhere in the refname.
+	RefspecPattern bool
+}
+
+// String returns one stable text form of the options.
+func (options Options) String() string {
+	return fmt.Sprintf("allow_onelevel=%t,refspec_pattern=%t", options.AllowOneLevel, options.RefspecPattern)
+}
+
+func (options Options) flags() int {
+	var flags int
+	if options.AllowOneLevel {
+		flags |= refnameAllowOneLevel
+	}
+
+	if options.RefspecPattern {
+		flags |= refnameRefspecPattern
+	}
+
+	return flags
+}