pkg/sdk/{action,handler,informer,query,types} should probably just be one package called sdk

[ericchiang]

All of these packages implement small bits of code and it's not clear why they're separate. Things like handler.Handler and informer.Informer are good examples of types that should just be in a common package.

We can have more than one type per package. This ain't Java.

https://rakyll.org/style-packages/

$ go doc github.com/coreos/operator-sdk/pkg/sdk/handler
package handler // import "github.com/coreos/operator-sdk/pkg/sdk/handler"

type Handler interface{ ... }
    var RegisteredHandler Handler
$ go doc github.com/coreos/operator-sdk/pkg/sdk/informer
package informer // import "github.com/coreos/operator-sdk/pkg/sdk/informer"

type Informer interface{ ... }
    func New(resourcePluralName, namespace string, resourceClient dynamic.ResourceInterface, ...) Informer
$ go doc github.com/coreos/operator-sdk/pkg/sdk/query
package query // import "github.com/coreos/operator-sdk/pkg/sdk/query"

Package query contains a set of APIs for accessing kubernetes objects.

func Get(into sdkTypes.Object, opts ...GetOption) error
func List(namespace string, into sdkTypes.Object, opts ...ListOption) error
type GetOp struct{ ... }
    func NewGetOp() *GetOp
type GetOption func(*GetOp)
    func WithGetOptions(metaGetOptions *metav1.GetOptions) GetOption
type ListOp struct{ ... }
    func NewListOp() *ListOp
type ListOption func(*ListOp)
    func WithListOptions(metaListOptions *metav1.ListOptions) ListOption
$ go doc github.com/coreos/operator-sdk/pkg/sdk/types
package types // import "github.com/coreos/operator-sdk/pkg/sdk/types"

type Context struct{ ... }
type Event struct{ ... }
type Object runtime.Object

[hasbro17]

Fixed in #242