implement basic exec [ci skip]

engine/compiler/step.go

@@ -43,7 +43,7 @@ func createStep(spec *resource.Pipeline, src *resource.Step) *engine.Step {
 		Networks: nil, // set in compiler.go
 		Files:    nil, // set below
 		Volumes:  nil, // set below
-		// Devices:      nil,              // TODO
+		Devices:  nil, // see below
 		// Resources:    toResources(src), // TODO
 	}
 
@@ -55,6 +55,14 @@ func createStep(spec *resource.Pipeline, src *resource.Step) *engine.Step {
 		})
 	}
 
+	// appends the devices to the container def.
+	for _, vol := range src.Devices {
+		dst.Devices = append(dst.Devices, &engine.VolumeDevice{
+			Name:       vol.Name,
+			DevicePath: vol.DevicePath,
+		})
+	}
+
 	// appends the settings variables to the
 	// container definition.
 	for key, value := range src.Settings {
@@ -82,19 +90,6 @@ func createStep(spec *resource.Pipeline, src *resource.Step) *engine.Step {
 		}
 	}
 
-	// // if the step specifies shell commands we generate a
-	// // script. The script is copied to the container at
-	// // runtime (or mounted as a config map) and then executed
-	// // as the entrypoint.
-	// if len(src.Commands) > 0 {
-	// 	switch spec.Platform.OS {
-	// 	case "windows":
-	// 		setupScriptWin(spec, dst, src)
-	// 	default:
-	// 		setupScript(spec, dst, src)
-	// 	}
-	// }
-
 	// set the pipeline step run policy. steps run on
 	// success by default, but may be optionally configured
 	// to run on failure.