update kube and vendor dependencies

With kubernetes 1.18 release of client-go, signatures on methods in
generated clientsets, dynamic, metadata, and scale clients have been
modified to accept context.Context as a first argument.
Signatures of Create, Update, and Patch methods have been updated
to accept CreateOptions, UpdateOptions and PatchOptions respectively.
Signatures of Delete and DeleteCollection methods now accept
DeleteOptions by value instead of by reference.
These changes are now accommodated with this PR and client-go
and dependencies are updated to v1.18.0

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/k8s.io/gengo/generator/generator.go

@@ -31,6 +31,8 @@ type Package interface {
 	Name() string
 	// Path returns the package import path.
 	Path() string
+	// SourcePath returns the location of the package on disk.
+	SourcePath() string
 
 	// Filter should return true if this package cares about this type.
 	// Otherwise, this type will be omitted from the type ordering for
@@ -50,14 +52,16 @@ type Package interface {
 }
 
 type File struct {
-	Name        string
-	FileType    string
-	PackageName string
-	Header      []byte
-	Imports     map[string]struct{}
-	Vars        bytes.Buffer
-	Consts      bytes.Buffer
-	Body        bytes.Buffer
+	Name              string
+	FileType          string
+	PackageName       string
+	Header            []byte
+	PackagePath       string
+	PackageSourcePath string
+	Imports           map[string]struct{}
+	Vars              bytes.Buffer
+	Consts            bytes.Buffer
+	Body              bytes.Buffer
 }
 
 type FileType interface {
@@ -156,6 +160,12 @@ type Context struct {
 	// All the types, in case you want to look up something.
 	Universe types.Universe
 
+	// Incoming imports, i.e. packages importing the given package.
+	incomingImports map[string][]string
+
+	// Incoming transitive imports, i.e. the transitive closure of IncomingImports
+	incomingTransitiveImports map[string][]string
+
 	// All the user-specified packages.  This is after recursive expansion.
 	Inputs []string
 
@@ -203,11 +213,36 @@ func NewContext(b *parser.Builder, nameSystems namer.NameSystems, canonicalOrder
 	return c, nil
 }
 
+// IncomingImports returns the incoming imports for each package. The map is lazily computed.
+func (ctxt *Context) IncomingImports() map[string][]string {
+	if ctxt.incomingImports == nil {
+		incoming := map[string][]string{}
+		for _, pkg := range ctxt.Universe {
+			for imp := range pkg.Imports {
+				incoming[imp] = append(incoming[imp], pkg.Path)
+			}
+		}
+		ctxt.incomingImports = incoming
+	}
+	return ctxt.incomingImports
+}
+
+// TransitiveIncomingImports returns the transitive closure of the incoming imports for each package.
+// The map is lazily computed.
+func (ctxt *Context) TransitiveIncomingImports() map[string][]string {
+	if ctxt.incomingTransitiveImports == nil {
+		ctxt.incomingTransitiveImports = transitiveClosure(ctxt.IncomingImports())
+	}
+	return ctxt.incomingTransitiveImports
+}
+
 // AddDir adds a Go package to the context. The specified path must be a single
 // go package import path.  GOPATH, GOROOT, and the location of your go binary
 // (`which go`) will all be searched, in the normal Go fashion.
 // Deprecated. Please use AddDirectory.
 func (ctxt *Context) AddDir(path string) error {
+	ctxt.incomingImports = nil
+	ctxt.incomingTransitiveImports = nil
 	return ctxt.builder.AddDirTo(path, &ctxt.Universe)
 }
 
@@ -215,5 +250,7 @@ func (ctxt *Context) AddDir(path string) error {
 // single go package import path.  GOPATH, GOROOT, and the location of your go
 // binary (`which go`) will all be searched, in the normal Go fashion.
 func (ctxt *Context) AddDirectory(path string) (*types.Package, error) {
+	ctxt.incomingImports = nil
+	ctxt.incomingTransitiveImports = nil
 	return ctxt.builder.AddDirectoryTo(path, &ctxt.Universe)
 }