fix special string in the filename

Signed-off-by: d-d-up <[email protected]>

pkg/cli/values/options.go

@@ -112,7 +112,10 @@ func readFile(filePath string, p getter.Providers) ([]byte, error) {
 	if strings.TrimSpace(filePath) == "-" {
 		return ioutil.ReadAll(os.Stdin)
 	}
-	u, _ := url.Parse(filePath)
+	u, err := url.Parse(filePath)
+	if err != nil {
+		return nil, err
+	}
 
 	// FIXME: maybe someone handle other protocols like ftp.
 	g, err := p.ByScheme(u.Scheme)

pkg/cli/values/options_test.go

@@ -19,6 +19,8 @@ package values
 import (
 	"reflect"
 	"testing"
+
+	"helm.sh/helm/v3/pkg/getter"
 )
 
 func TestMergeValues(t *testing.T) {
@@ -75,3 +77,12 @@ func TestMergeValues(t *testing.T) {
 		t.Errorf("Expected a map with different keys to merge properly with another map. Expected: %v, got %v", expectedMap, testMap)
 	}
 }
+
+func TestReadFile(t *testing.T) {
+	var p getter.Providers
+	filePath := "%a.txt"
+	_, err := readFile(filePath, p)
+	if err == nil {
+		t.Errorf("Expected error when has special strings")
+	}
+}