Support file path as input param for Kubernetes token value

pkg/types/file_or_content.go

@@ -0,0 +1,32 @@
+package types
+
+import "os"
+
+// FileOrContent holds a file path or content.
+type FileOrContent string
+
+// String returns the FileOrContent in string format.
+func (f FileOrContent) String() string {
+	return string(f)
+}
+
+// IsPath returns true if the FileOrContent is a file path, otherwise returns false.
+func (f FileOrContent) IsPath() bool {
+	_, err := os.Stat(f.String())
+	return err == nil
+}
+
+// Read returns the content after reading the FileOrContent variable.
+func (f FileOrContent) Read() ([]byte, error) {
+	var content []byte
+	if f.IsPath() {
+		var err error
+		content, err = os.ReadFile(f.String())
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		content = []byte(f)
+	}
+	return content, nil
+}