continued work on encryption

cmd/metadatagen/main.go

@@ -16,13 +16,11 @@ var (
 	version string
 
 	dst      string
-	dstkey   string
 	metadata string
 )
 
 func main() {
 	flag.StringVar(&dst, "dst", "", "url path to cache files (example: file:///mnt/cache)")
-	flag.StringVar(&dstkey, "dstkey", "", "hex encoded encryption key for dst")
 	flag.StringVar(&metadata, "data", "", "path to metadata file")
 	flag.Parse()
 
@@ -30,12 +28,13 @@ func main() {
 		dstk []byte
 		err  error
 	)
+	dstkey := os.Getenv("DST_KEY")
 	if dstkey != "" {
 		dstk, err = hex.DecodeString(dstkey)
 		fmt.Println(err)
 		os.Exit(1)
 	}
-	dstfs, err := parse.FS(dst, dstk)
+	dstfs, err := parse.FS(dst, dstk, true)
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)