If input zip file cannot opened, print its name.

Test: touch empty.zip; merge_zips out.zip empty.zip
(output should contain `empty.zip: zip: not a valid zip file`)

Change-Id: If707876af2301d7ad7d065c004cffb0c2491c7df

parent 0c9c0f04

cmd/merge_zips/merge_zips.go

+4 −2

Original line number	Diff line number	Diff line
		@@ -667,8 +667,10 @@ func (fiz *FileInputZip) Open() error {
		return nil
		}
		var err error
		fiz.reader, err = zip.OpenReader(fiz.Name())
		return err
		if fiz.reader, err = zip.OpenReader(fiz.Name()); err != nil {
		return fmt.Errorf("%s: %s", fiz.Name(), err.Error())
		}
		return nil
		}

		func main() {