Call 'Finish' when the wrapped Reader or Writer is closed

Author: Jesper Lindstrøm Nielsen

go.mod

@@ -6,3 +6,5 @@ require (
 	github.com/mattn/go-runewidth v0.0.4
 	golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb
 )
+
+go 1.13

reader.go

@@ -18,6 +18,7 @@ func (r *Reader) Read(p []byte) (n int, err error) {
 
 // Close the reader when it implements io.Closer
 func (r *Reader) Close() (err error) {
+	r.bar.Finish()
 	if closer, ok := r.Reader.(io.Closer); ok {
 		return closer.Close()
 	}

v3/go.mod

@@ -7,3 +7,5 @@ require (
 	github.com/mattn/go-isatty v0.0.8
 	github.com/mattn/go-runewidth v0.0.4
 )
+
+go 1.13

v3/io.go

@@ -19,6 +19,7 @@ func (r *Reader) Read(p []byte) (n int, err error) {
 
 // Close the wrapped reader when it implements io.Closer
 func (r *Reader) Close() (err error) {
+	r.bar.Finish()
 	if closer, ok := r.Reader.(io.Closer); ok {
 		return closer.Close()
 	}
@@ -40,6 +41,7 @@ func (r *Writer) Write(p []byte) (n int, err error) {
 
 // Close the wrapped reader when it implements io.Closer
 func (r *Writer) Close() (err error) {
+	r.bar.Finish()
 	if closer, ok := r.Writer.(io.Closer); ok {
 		return closer.Close()
 	}

writer.go

@@ -18,6 +18,7 @@ func (r *Writer) Write(p []byte) (n int, err error) {
 
 // Close the reader when it implements io.Closer
 func (r *Writer) Close() (err error) {
+	r.bar.Finish()
 	if closer, ok := r.Writer.(io.Closer); ok {
 		return closer.Close()
 	}