set cache location from cli args

cmd/steamimmich.go

@@ -16,6 +16,7 @@ type args struct {
 	UserdataDir string `arg:"--steam-userdata-dir" placeholder:"USERDATA_DIR" help:"Steam userdata directory. If not set, search automaticly."`
 	DeviceID    string `arg:"--device-id" default:"steam-immich" help:"Device ID of the uploads"`
 	Album       string `arg:"--album" help:"UUID of a album to upload to"`
+	CacheFile   string `arg:"--cache" default:"$XDG_CACHE_HOME/steam-immich.json" help:"Location of the cache file"`
 }
 
 func Run() {
@@ -43,6 +44,7 @@ func Run() {
 		UserdataDir: steamUserdataDir,
 		DeiveID:     args.DeviceID,
 		Album:       args.Album,
+		CacheFile:   os.ExpandEnv(args.CacheFile),
 	})
 }