delete attached namespaces on environment deletion

api/server/handlers/environment/delete.go

@@ -3,6 +3,7 @@ package environment
 import (
 	"net/http"
 
+	"github.com/porter-dev/porter/api/server/authz"
 	"github.com/porter-dev/porter/api/server/handlers"
 	"github.com/porter-dev/porter/api/server/handlers/gitinstallation"
 	"github.com/porter-dev/porter/api/server/shared"
@@ -16,6 +17,7 @@ import (
 
 type DeleteEnvironmentHandler struct {
 	handlers.PorterHandlerReadWriter
+	authz.KubernetesAgentGetter
 }
 
 func NewDeleteEnvironmentHandler(
@@ -71,6 +73,25 @@ func (c *DeleteEnvironmentHandler) ServeHTTP(w http.ResponseWriter, r *http.Requ
 		return
 	}
 
+	// delete all corresponding deployments
+	agent, err := c.GetAgent(r, cluster, "")
+
+	if err != nil {
+		c.HandleAPIError(w, r, apierrors.NewErrInternal(err))
+		return
+	}
+
+	depls, err := c.Repo().Environment().ListDeployments(env.ID)
+
+	if err != nil {
+		c.HandleAPIError(w, r, apierrors.NewErrInternal(err))
+		return
+	}
+
+	for _, depl := range depls {
+		agent.DeleteNamespace(depl.Namespace)
+	}
+
 	// delete the environment
 	env, err = c.Repo().Environment().DeleteEnvironment(env)