Revert "GODT-2229: Allow changing cache folder to a non-empty folder."

This reverts commit b19e16e4b8.

internal/bridge/files.go

@@ -18,8 +18,6 @@
 package bridge
 
 import (
-	"fmt"
-	"io"
 	"os"
 	"path/filepath"
 )
@@ -64,75 +62,3 @@ func moveFile(from, to string) error {
 
 	return nil
 }
-
-func copyDir(from, to string) error {
-	entries, err := os.ReadDir(from)
-	if err != nil {
-		return err
-	}
-	if err := createIfNotExists(to, 0o700); err != nil {
-		return err
-	}
-	for _, entry := range entries {
-		sourcePath := filepath.Join(from, entry.Name())
-		destPath := filepath.Join(to, entry.Name())
-
-		if entry.IsDir() {
-			if err := copyDir(sourcePath, destPath); err != nil {
-				return err
-			}
-		} else {
-			if err := copyFile(sourcePath, destPath); err != nil {
-				return err
-			}
-		}
-	}
-	return nil
-}
-
-func copyFile(srcFile, dstFile string) error {
-	out, err := os.Create(filepath.Clean(dstFile))
-	defer func(out *os.File) {
-		_ = out.Close()
-	}(out)
-
-	if err != nil {
-		return err
-	}
-
-	in, err := os.Open(filepath.Clean(srcFile))
-	defer func(in *os.File) {
-		_ = in.Close()
-	}(in)
-
-	if err != nil {
-		return err
-	}
-
-	_, err = io.Copy(out, in)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func exists(filePath string) bool {
-	if _, err := os.Stat(filePath); os.IsNotExist(err) {
-		return false
-	}
-
-	return true
-}
-
-func createIfNotExists(dir string, perm os.FileMode) error {
-	if exists(dir) {
-		return nil
-	}
-
-	if err := os.MkdirAll(dir, perm); err != nil {
-		return fmt.Errorf("failed to create directory: '%s', error: '%s'", dir, err.Error())
-	}
-
-	return nil
-}