platform/packet/console: keep a track of the console status

it might prevent to close twice the channel

Signed-off-by: Mathieu Tortuyaux <[email protected]>

platform/machine/packet/console.go

@@ -22,10 +22,11 @@ import (
 )
 
 type console struct {
-	pc   *cluster
-	f    *os.File
-	buf  bytes.Buffer
-	done chan interface{}
+	pc     *cluster
+	f      *os.File
+	buf    bytes.Buffer
+	closed bool
+	done   chan interface{}
 }
 
 func (c *console) SSHClient(ip, user string) (*ssh.Client, error) {
@@ -38,7 +39,10 @@ func (c *console) Write(p []byte) (int, error) {
 }
 
 func (c *console) Close() error {
-	close(c.done)
+	if !c.closed {
+		close(c.done)
+		c.closed = !c.closed
+	}
 	return c.f.Close()
 }