feat(secrets): initial support for 'x-command' and 'driver: exec' secrets, referenced as secret://name in environment (#403)

pkg/client/compose/deploy.go

@@ -65,6 +65,12 @@ func (d *Deployment) Plan(ctx context.Context) (Plan, error) {
 	}
 	var plan Plan
 
+	// Resolve 'secret://name' references to actual secret values (if there are some and they haven't been resolved yet)
+	// before building service specs from the project.
+	if err := ResolveSecrets(ctx, d.Project); err != nil {
+		return plan, fmt.Errorf("resolve secrets: %w", err)
+	}
+
 	// Generate service specs for all services in the project.
 	var serviceSpecs []api.ServiceSpec
 	var mu sync.Mutex