Add validation phases

This patch introduces ability to validate phases using kubeval.
Appropriate functionality was embedded into phase/plan validate
command.

Change-Id: I1e1ccae2b7e4948bdc97a199c96c07a3eb7292b2
Signed-off-by: Ruslan Aliev <raliev@mirantis.com>
Relates-To: #503
Closes: #2
Closes: #19

pkg/document/bundle.go

@@ -59,10 +59,31 @@ type Bundle interface {
 	Append(Document) error
 }
 
+// DocFactoryFunc is a type of function which returns (Document, error) and can be used on demand
+type DocFactoryFunc func() (Document, error)
+
 // BundleFactoryFunc is a function that returns bundle, can be used to build bundle on demand
 // instead of inplace, useful, when you don't know if bundle will be needed or not, see phase for detail
 type BundleFactoryFunc func() (Bundle, error)
 
+// BundleFactoryFromBytes is a function which returns BundleFactoryFunc based on new bundle from bytes
+func BundleFactoryFromBytes(data []byte) BundleFactoryFunc {
+	return func() (Bundle, error) {
+		return NewBundleFromBytes(data)
+	}
+}
+
+// BundleFactoryFromDocRoot is a function which returns BundleFactoryFunc based on new bundle from DocumentRoot path
+func BundleFactoryFromDocRoot(docRootFunc func() (string, error)) BundleFactoryFunc {
+	return func() (Bundle, error) {
+		path, err := docRootFunc()
+		if err != nil {
+			return nil, err
+		}
+		return NewBundleByPath(path)
+	}
+}
+
 // NewBundleByPath is a function which builds new document.Bundle from kustomize rootPath using default FS object
 // example: document.NewBundleByPath("path/to/phase-root")
 func NewBundleByPath(rootPath string) (Bundle, error) {

pkg/document/constants.go

@@ -36,6 +36,15 @@ const (
 	ClusterctlMetadataKind    = "Metadata"
 	ClusterctlMetadataVersion = "v1alpha3"
 	ClusterctlMetadataGroup   = "clusterctl.cluster.x-k8s.io"
+
+	// DocumentValidationGroup defines Group for document-validation container
+	DocumentValidationGroup = "airshipit.org"
+	// DocumentValidationVersion defines Version for document-validation container
+	DocumentValidationVersion = "v1alpha1"
+	// DocumentValidationKind defines Kind for document-validation container
+	DocumentValidationKind = "GenericContainer"
+	// DocumentValidationName defines Name for document-validation container
+	DocumentValidationName = "document-validation"
 )
 
 // KustomizationFile is used for kustomization file

pkg/document/selectors.go

@@ -190,6 +190,14 @@ func NewClusterctlMetadataSelector() Selector {
 		ClusterctlMetadataKind)
 }
 
+// NewValidatorExecutorSelector returns selector to get validator executor documents
+func NewValidatorExecutorSelector() Selector {
+	return NewSelector().ByGvk(DocumentValidationGroup,
+		DocumentValidationVersion,
+		DocumentValidationKind).
+		ByName(DocumentValidationName)
+}
+
 //GetSecretData returns data located with a given key of a given document
 func GetSecretData(docBundle Bundle, apiSelector types.Selector, key string) ([]byte, error) {
 	s := NewSelector()