provide runner to workers, use it for all builds

Signed-off-by: Abhijit Hiremagalur <abhi@pivotallabs.com>

pkg/queue/queue.go

@@ -1,9 +1,11 @@
 package queue
 
 import (
+	"github.com/drone/drone/pkg/build/docker"
 	"github.com/drone/drone/pkg/build/script"
 	. "github.com/drone/drone/pkg/model"
 	"runtime"
+	"time"
 )
 
 // A Queue dispatches tasks to workers.
@@ -23,11 +25,11 @@ type BuildTask struct {
 	Script *script.Build
 }
 
-var defaultQueue = Start(runtime.NumCPU()) // TEMPORARY; INJECT PLEASE
+var defaultQueue = Start(runtime.NumCPU(), newRunner(docker.DefaultClient, 300*time.Second)) // TEMPORARY; INJECT PLEASE
 
 var Add = defaultQueue.Add // TEMPORARY; INJECT PLEASE
 
-func Start(workers int) *Queue {
+func Start(workers int, runner Runner) *Queue {
 	// get the number of CPUs. Since builds
 	// tend to be CPU-intensive we should only
 	// execute 1 build per CPU.
@@ -42,7 +44,10 @@ func Start(workers int) *Queue {
 
 	// spawn a worker for each CPU
 	for i := 0; i < workers; i++ {
-		worker := worker{}
+		worker := worker{
+			runner: runner,
+		}
+
 		go worker.work(tasks)
 	}