bytes.Buffer
}

func (pb *pkgBuffer) Write(p []byte) (int, error) {
	pb.packageClause()
	return pb.Buffer.Write(p)
}

func (pb *pkgBuffer) packageClause() {
	if !pb.printed {
		pb.printed = true
		// Only show package clause for commands if requested explicitly.
		if pb.pkg.pkg.Name != "main" || showCmd {
			pb.pkg.packageClause()
		}
	}
}

type PackageError string // type returned by pkg.Fatalf.