Implement render method for clusterctl executor

Change-Id: If3d66baa8eec27f51705c813f17854ad7ef23a26
Signed-off-by: Ruslan Aliev <raliev@mirantis.com>

pkg/clusterctl/client/client.go

@@ -15,8 +15,11 @@
 package client
 
 import (
+	"sigs.k8s.io/cluster-api/cmd/clusterctl/api/v1alpha3"
 	clusterctlclient "sigs.k8s.io/cluster-api/cmd/clusterctl/client"
 	clusterctlconfig "sigs.k8s.io/cluster-api/cmd/clusterctl/client/config"
+	"sigs.k8s.io/cluster-api/cmd/clusterctl/client/repository"
+	"sigs.k8s.io/cluster-api/cmd/clusterctl/client/yamlprocessor"
 	clog "sigs.k8s.io/cluster-api/cmd/clusterctl/log"
 
 	airshipv1 "opendev.org/airship/airshipctl/pkg/api/v1alpha1"
@@ -26,11 +29,23 @@ import (
 
 var _ Interface = &Client{}
 
+const (
+	// BootstrapProviderType is a local copy of appropriate type from cluster-api
+	BootstrapProviderType = v1alpha3.BootstrapProviderType
+	// CoreProviderType is a local copy of appropriate type from cluster-api
+	CoreProviderType = v1alpha3.CoreProviderType
+	// ControlPlaneProviderType is a local copy of appropriate type from cluster-api
+	ControlPlaneProviderType = v1alpha3.ControlPlaneProviderType
+	// InfrastructureProviderType is a local copy of appropriate type from cluster-api
+	InfrastructureProviderType = v1alpha3.InfrastructureProviderType
+)
+
 // Interface is abstraction to Clusterctl
 type Interface interface {
 	Init(kubeconfigPath, kubeconfigContext string) error
 	Move(fromKubeconfigPath, fromKubeconfigContext, toKubeconfigPath, toKubeconfigContext, namespace string) error
 	GetKubeconfig(options *GetKubeconfigOptions) (string, error)
+	Render(options RenderOptions) ([]byte, error)
 }
 
 // Client Implements interface to Clusterctl
@@ -38,6 +53,14 @@ type Client struct {
 	clusterctlClient clusterctlclient.Client
 	initOptions      clusterctlclient.InitOptions
 	moveOptions      clusterctlclient.MoveOptions
+	repoFactory      RepositoryFactory
+}
+
+// RenderOptions is used to get providers from RepoFactory for Render method
+type RenderOptions struct {
+	ProviderName    string
+	ProviderVersion string
+	ProviderType    string
 }
 
 // GetKubeconfigOptions carries all the options to retrieve kubeconfig from parent cluster
@@ -69,11 +92,11 @@ func NewClient(root string, debug bool, options *airshipv1.Clusterctl) (Interfac
 			ControlPlaneProviders:   initOptions.ControlPlaneProviders,
 		}
 	}
-	cclient, err := newClusterctlClient(root, options)
+	cclient, rf, err := newClusterctlClient(root, options)
 	if err != nil {
 		return nil, err
 	}
-	return &Client{clusterctlClient: cclient, initOptions: cio}, nil
+	return &Client{clusterctlClient: cclient, initOptions: cio, repoFactory: rf}, nil
 }
 
 // Init implements interface to Clusterctl
@@ -90,10 +113,6 @@ func (c *Client) Init(kubeconfigPath, kubeconfigContext string) error {
 // newConfig returns clusterctl config client
 func newConfig(options *airshipv1.Clusterctl, root string) (clusterctlconfig.Client, error) {
 	for _, provider := range options.Providers {
-		// this is a workaround as clusterctl validates if URL is empty, even though it is not
-		// used anywhere outside repository factory which we override
-		// TODO (kkalynovskyi) we need to create issue for this in clusterctl, and remove URL
-		// validation and move it to be an error during repository interface initialization
 		if !provider.IsClusterctlRepository {
 			provider.URL = root
 		}
@@ -105,11 +124,13 @@ func newConfig(options *airshipv1.Clusterctl, root string) (clusterctlconfig.Cli
 	return clusterctlconfig.New("", clusterctlconfig.InjectReader(reader))
 }
 
-func newClusterctlClient(root string, options *airshipv1.Clusterctl) (clusterctlclient.Client, error) {
+func newClusterctlClient(root string, options *airshipv1.Clusterctl) (clusterctlclient.Client,
+	RepositoryFactory, error) {
 	cconf, err := newConfig(options, root)
 	if err != nil {
-		return nil, err
+		return nil, RepositoryFactory{}, err
 	}
+
 	rf := RepositoryFactory{
 		Options:      options,
 		ConfigClient: cconf,
@@ -120,7 +141,32 @@ func newClusterctlClient(root string, options *airshipv1.Clusterctl) (clusterctl
 	orf := clusterctlclient.InjectRepositoryFactory(rf.ClientRepositoryFactory())
 	// options cluster client factory
 	occf := clusterctlclient.InjectClusterClientFactory(rf.ClusterClientFactory())
-	return clusterctlclient.New("", ocf, orf, occf)
+	client, err := clusterctlclient.New("", ocf, orf, occf)
+	return client, rf, err
+}
+
+// Render returns requested components as yaml
+func (c *Client) Render(renderOptions RenderOptions) ([]byte, error) {
+	provider, err := c.repoFactory.ConfigClient.Providers().Get(renderOptions.ProviderName,
+		v1alpha3.ProviderType(renderOptions.ProviderType))
+	if err != nil {
+		return nil, err
+	}
+
+	crf := c.repoFactory.ClientRepositoryFactory()
+	repoClient, err := crf(clusterctlclient.RepositoryClientFactoryInput{
+		Provider:  provider,
+		Processor: yamlprocessor.NewSimpleProcessor(),
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	components, err := repoClient.Components().Get(repository.ComponentsOptions{Version: renderOptions.ProviderVersion})
+	if err != nil {
+		return nil, err
+	}
+	return components.Yaml()
 }
 
 // GetKubeconfig is a wrapper for related cluster-api function

pkg/phase/executors/clusterctl.go

@@ -15,11 +15,14 @@
 package executors
 
 import (
+	"bytes"
 	"io"
+	"strings"
 
 	airshipv1 "opendev.org/airship/airshipctl/pkg/api/v1alpha1"
 	"opendev.org/airship/airshipctl/pkg/cluster/clustermap"
 	"opendev.org/airship/airshipctl/pkg/clusterctl/client"
+	"opendev.org/airship/airshipctl/pkg/document"
 	"opendev.org/airship/airshipctl/pkg/errors"
 	"opendev.org/airship/airshipctl/pkg/events"
 	"opendev.org/airship/airshipctl/pkg/k8s/kubeconfig"
@@ -162,8 +165,44 @@ func (c *ClusterctlExecutor) Validate() error {
 }
 
 // Render executor documents
-func (c *ClusterctlExecutor) Render(w io.Writer, _ ifc.RenderOptions) error {
-	// will be implemented later
-	_, err := w.Write([]byte{})
+func (c *ClusterctlExecutor) Render(w io.Writer, ro ifc.RenderOptions) error {
+	dataAll := bytes.NewBuffer([]byte{})
+	typeMap := map[string][]string{
+		string(client.BootstrapProviderType):      c.options.InitOptions.BootstrapProviders,
+		string(client.ControlPlaneProviderType):   c.options.InitOptions.ControlPlaneProviders,
+		string(client.InfrastructureProviderType): c.options.InitOptions.InfrastructureProviders,
+		string(client.CoreProviderType): (map[bool][]string{true: {c.options.InitOptions.CoreProvider},
+			false: {}})[c.options.InitOptions.CoreProvider != ""],
+	}
+	for prvType, prvList := range typeMap {
+		for _, prv := range prvList {
+			res := strings.Split(prv, ":")
+			if len(res) != 2 {
+				return ErrUnableParseProvider{
+					Provider:     prv,
+					ProviderType: prvType,
+				}
+			}
+			data, err := c.Interface.Render(client.RenderOptions{
+				ProviderName:    res[0],
+				ProviderVersion: res[1],
+				ProviderType:    prvType,
+			})
+			if err != nil {
 				return err
+			}
+			dataAll.Write(data)
+			dataAll.Write([]byte("\n---\n"))
+		}
+	}
+
+	bundle, err := document.NewBundleFromBytes(dataAll.Bytes())
+	if err != nil {
+		return err
+	}
+	filtered, err := bundle.SelectBundle(ro.FilterSelector)
+	if err != nil {
+		return err
+	}
+	return filtered.Write(w)
 }

pkg/phase/executors/clusterctl_test.go

@@ -44,7 +44,7 @@ metadata:
   name: clusterctl-v1
 action: %s
 init-options:
-  core-provider: "cluster-api:v0.3.3"
+  core-provider: "cluster-api:v0.3.2"
   kubeConfigRef:
     apiVersion: airshipit.org/v1alpha1
     kind: KubeConfig
@@ -53,7 +53,19 @@ providers:
   - name: "cluster-api"
     type: "CoreProvider"
     versions:
-      v0.3.3: manifests/function/capi/v0.3.3`
+      v0.3.2: functions/capi/infrastructure/v0.3.2`
+
+	renderedDocs = `---
+apiVersion: v1
+kind: Namespace
+metadata:
+  labels:
+    cluster.x-k8s.io/provider: cluster-api
+    clusterctl.cluster.x-k8s.io: ""
+    control-plane: controller-manager
+  name: version-two
+...
+`
 )
 
 func TestNewExecutor(t *testing.T) {
@@ -202,6 +214,6 @@ func TestExecutorRender(t *testing.T) {
 	require.NoError(t, err)
 	actualOut := &bytes.Buffer{}
 	actualErr := executor.Render(actualOut, ifc.RenderOptions{})
-	assert.Len(t, actualOut.Bytes(), 0)
+	assert.Equal(t, renderedDocs, actualOut.String())
 	assert.NoError(t, actualErr)
 }

pkg/phase/executors/errors.go

@@ -47,3 +47,13 @@ type ErrUnknownExecutorName struct {
 func (e ErrUnknownExecutorName) Error() string {
 	return fmt.Sprintf("unknown executor name '%s'", e.ExecutorName)
 }
+
+// ErrUnableParseProvider is returned when it's impossible to parse provider's name and version
+type ErrUnableParseProvider struct {
+	Provider     string
+	ProviderType string
+}
+
+func (e ErrUnableParseProvider) Error() string {
+	return fmt.Sprintf("unable to parse name and version of '%s' type, '%s' provider", e.ProviderType, e.Provider)
+}