sync: Implement writable importer

admin/sync/importer_localfs.go

@@ -3,6 +3,7 @@ package sync
 import (
 	"bufio"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"log"
 	"os"
@@ -94,6 +95,16 @@ func (i LocalImporter) getFile(filename string, writer *bufio.Writer) error {
 	}
 }
 
+func (i LocalImporter) writeFile(filename string, reader io.Reader) error {
+	if fd, err := os.Create(path.Join(i.Base, filename)); err != nil {
+		return err
+	} else {
+		defer fd.Close()
+		io.Copy(fd, reader)
+		return nil
+	}
+}
+
 func (i LocalImporter) listDir(filename string) ([]string, error) {
 	if files, err := ioutil.ReadDir(path.Join(i.Base, filename)); err != nil {
 		return nil, err