Ensure that parent directories exist for config files

Signed-off-by: Evan Lezar <elezar@nvidia.com>

pkg/config/engine/config.go

@@ -19,6 +19,7 @@ package engine
 import (
 	"fmt"
 	"os"
+	"path/filepath"
 )
 
 // Config represents a runtime config
@@ -43,6 +44,13 @@ func (c Config) Write(output []byte) (int, error) {
 		return 0, nil
 	}
 
+	if dir := filepath.Dir(path); dir != "" {
+		err := os.MkdirAll(dir, 0755)
+		if err != nil {
+			return 0, fmt.Errorf("unable to create directory %v: %v", dir, err)
+		}
+	}
+
 	f, err := os.Create(path)
 	if err != nil {
 		return 0, fmt.Errorf("unable to open %v for writing: %v", path, err)