Don't nuke the download directory (#61)

cmd/download.go

@@ -84,25 +84,6 @@ func downloadCurrentConfiguration(ctx context.Context, d *os.File, absPath strin
 		log.Fatalf("Error connecting to API: %s", err)
 	}
 
-	names, err := d.Readdirnames(-1)
-	if err != nil {
-		log.Fatalf("Reading output directory failed: %s", err)
-	}
-	for _, name := range names {
-		err = os.RemoveAll(filepath.Join(absPath, name))
-		if err != nil {
-			log.Fatalf("Deleting output directory contents failed: %s", err)
-		}
-	}
-	err = d.Close()
-	if err != nil {
-		log.Fatalf("Reading output directory failed: %s", err)
-	}
-
-	if err := os.MkdirAll(absPath, 0755); err != nil {
-		log.Fatalf("Could not create the download directory %s: %s", absPath, err)
-	}
-
 	var buf []byte
 	stream, err := client.DownloadCurrentTrainingData(ctx, &configv1.DownloadCurrentTrainingDataRequest{AppId: appId})
 	if err != nil {

pkg/upload/tar.go

@@ -80,7 +80,7 @@ func ExtractTarToDir(outDir string, r io.Reader) error {
 			}
 		case tar.TypeReg:
 			fmt.Printf("Writing file %s (%d bytes)\n", target, header.Size)
-			f, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode))
+			f, err := os.OpenFile(target, os.O_RDWR|os.O_CREATE|os.O_TRUNC, os.FileMode(header.Mode))
 			if err != nil {
 				return err
 			}