add sleep option

DOCS.md

@@ -28,6 +28,7 @@ deploy:
      - bar.com
     user: root
     port: 22
+    sleep: 5
     commands:
       - echo hello
       - echo world
@@ -35,6 +36,8 @@ deploy:
 
 In the above example Drone executes the commands on multiple hosts sequentially. If the commands fail on a single host this plugin exits immediatly, and will not run your commands on the remaining hosts in the list.
 
+The above example also uses the `sleep` parameter. The sleep parameter instructs Drone to sleep for N seconds between host executions.
+
 ## Keys
 
 The plugin authenticates to your server using a per-repository SSH key generated by Drone. You can find the public key in your repository settings in Drone. You will need to copy / paste this key into your `~/.ssh/authorized_keys` file on your remote machine.

main.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"strconv"
 	"strings"
+	"time"
 
 	"github.com/drone/drone-plugin-go/plugin"
 	"golang.org/x/crypto/ssh"
@@ -18,6 +19,7 @@ type Params struct {
 	Login    string   `json:"user"`
 	Port     int      `json:"port"`
 	Host     StrSlice `json:"host"`
+	Sleep    int      `json:"sleep"`
 }
 
 func main() {
@@ -27,11 +29,15 @@ func main() {
 	plugin.Param("vargs", &v)
 	plugin.MustParse()
 
-	for _, host := range v.Host.Slice() {
+	for i, host := range v.Host.Slice() {
 		err := run(w.Keys, v, host)
 		if err != nil {
 			os.Exit(1)
 		}
+		if v.Sleep != 0 && i > v.Host.Len()-1 {
+			fmt.Printf("$ sleep %d\n", v.Sleep)
+			time.Sleep(time.Duration(v.Sleep) * time.Second)
+		}
 	}
 }