Ensure we fail during deploys

If an error gets emitted during a deployment, we should fail.
This also reenables colors that seems to have gotten lost somewhere.

pkg/engine/deploy.go

@@ -108,9 +108,11 @@ func (eng *Engine) deployLatest(info *envCmdInfo, opts deployOptions) error {
 			_ = eng.Environment.SaveEnvironment(targ, summary.Snap())
 
 			fmt.Fprint(eng.Stdout, colors.Colorize(&footer))
+			if err != nil {
 				return err
 			}
 		}
+	}
 	if !eng.Diag().Success() {
 		// If any error that wasn't printed above, be sure to make it evident in the output.
 		return goerr.New("One or more errors occurred during this deployment")

pkg/engine/engine.go

@@ -21,7 +21,9 @@ type Engine struct {
 
 func (e *Engine) Diag() diag.Sink {
 	if e.snk == nil {
-		e.InitDiag(diag.FormatOptions{})
+		e.InitDiag(diag.FormatOptions{
+			Colors: true,
+		})
 	}
 
 	return e.snk