1 files changed, 20 insertions, 0 deletions
diff --git a/modules/validation/binding.go b/modules/validation/binding.go
index f08f632426..c054fbe7b6 100644
--- a/modules/validation/binding.go
+++ b/modules/validation/binding.go
@@ -24,6 +24,9 @@ const (
 
 	// ErrRegexPattern is returned when a regex pattern is invalid
 	ErrRegexPattern = "RegexPattern"
+
+	// ErrUsername is username error
+	ErrUsername = "UsernameError"
 )
 
 // AddBindingRules adds additional binding rules
@@ -34,6 +37,7 @@ func AddBindingRules() {
 	addGlobPatternRule()
 	addRegexPatternRule()
 	addGlobOrRegexPatternRule()
+	addUsernamePatternRule()
 }
 
 func addGitRefNameBindingRule() {
@@ -148,6 +152,22 @@ func addGlobOrRegexPatternRule() {
 	})
 }
 
+func addUsernamePatternRule() {
+	binding.AddRule(&binding.Rule{
+		IsMatch: func(rule string) bool {
+			return rule == "Username"
+		},
+		IsValid: func(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
+			str := fmt.Sprintf("%v", val)
+			if !IsValidUsername(str) {
+				errs.Add([]string{name}, ErrUsername, "invalid username")
+				return false, errs
+			}
+			return true, errs
+		},
+	})
+}
+
 func portOnly(hostport string) string {
 	colon := strings.IndexByte(hostport, ':')
 	if colon == -1 {