implement retry-now on SIGHUP (closes jpillora#51)

Author: jpillora

client/client.go

@@ -166,7 +166,7 @@ func (c *Client) loop() {
 			c.Debugf("Connection error: %s", connerr)
 			c.Infof("Retrying in %s...", d)
 			connerr = nil
-			time.Sleep(d)
+			chshare.SleepSignal(d)
 		}
 		d := websocket.Dialer{
 			ReadBufferSize:  1024,

share/signal.go

@@ -0,0 +1,23 @@
+//+build !windows
+
+package chshare
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+//Sleep unless Signal
+func SleepSignal(d time.Duration) {
+	//during this time, also listen for SIGHUP
+	//(this uses 0xc to allow windows to compile)
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, syscall.SIGHUP)
+	select {
+	case <-time.After(d):
+	case <-sig:
+	}
+	signal.Stop(sig)
+}

share/signal_windows.go

@@ -0,0 +1,10 @@
+//+build windows
+
+package chshare
+
+import "time"
+
+//Sleep unless Signal
+func SleepSignal(d time.Duration) {
+	time.Sleep(d) //not supported
+}