command/build, command/validate: Setup proper components to avoid nil

command/build/command.go

@@ -63,9 +63,10 @@ func (c Command) Run(env packer.Environment, args []string) int {
 
 	// The component finder for our builds
 	components := &packer.ComponentFinder{
-		Builder:     env.Builder,
-		Hook:        env.Hook,
-		Provisioner: env.Provisioner,
+		Builder:       env.Builder,
+		Hook:          env.Hook,
+		PostProcessor: env.PostProcessor,
+		Provisioner:   env.Provisioner,
 	}
 
 	// Go through each builder and compile the builds that we care about

command/validate/commang.go

@@ -56,9 +56,10 @@ func (c Command) Run(env packer.Environment, args []string) int {
 
 	// The component finder for our builds
 	components := &packer.ComponentFinder{
-		Builder:     env.Builder,
-		Hook:        env.Hook,
-		Provisioner: env.Provisioner,
+		Builder:       env.Builder,
+		Hook:          env.Hook,
+		PostProcessor: env.PostProcessor,
+		Provisioner:   env.Provisioner,
 	}
 
 	// Otherwise, get all the builds

packer/rpc/post_processor.go

@@ -18,7 +18,7 @@ type PostProcessorServer struct {
 }
 
 type PostProcessorProcessResponse struct {
-	Err error
+	Err        error
 	RPCAddress string
 }
 
@@ -83,7 +83,7 @@ func (p *PostProcessorServer) PostProcess(address string, reply *PostProcessorPr
 	}
 
 	*reply = PostProcessorProcessResponse{
-		Err: err,
+		Err:        err,
 		RPCAddress: responseAddress,
 	}