Remove bundles from API

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

runtime.go

@@ -0,0 +1,79 @@
+package containerd
+
+import (
+	"fmt"
+	"sync"
+
+	"golang.org/x/net/context"
+)
+
+// NewRuntimeFunc is the runtime's constructor
+type NewRuntimeFunc func(root string) (Runtime, error)
+
+var runtimeRegistration = struct {
+	mu       sync.Mutex
+	runtimes map[string]NewRuntimeFunc
+}{
+	runtimes: make(map[string]NewRuntimeFunc),
+}
+
+// RegisterRuntime is not external packages registers Runtimes for use with containerd
+func RegisterRuntime(name string, f NewRuntimeFunc) {
+	runtimeRegistration.mu.Lock()
+	defer runtimeRegistration.mu.Unlock()
+	if _, ok := runtimeRegistration.runtimes[name]; ok {
+		panic(fmt.Errorf("runtime already registered as %q", name))
+	}
+	runtimeRegistration.runtimes[name] = f
+}
+
+// Runtimes returns a slice of all registered runtime names for containerd
+func Runtimes() (o []string) {
+	runtimeRegistration.mu.Lock()
+	defer runtimeRegistration.mu.Unlock()
+
+	for k := range runtimeRegistration.runtimes {
+		o = append(o, k)
+	}
+	return o
+}
+
+// NewRuntime calls the runtime's constructor with the provided root
+func NewRuntime(name, root string) (Runtime, error) {
+	runtimeRegistration.mu.Lock()
+	defer runtimeRegistration.mu.Unlock()
+	f, ok := runtimeRegistration.runtimes[name]
+	if !ok {
+		return nil, ErrRuntimeNotExist
+	}
+	return f(root)
+}
+
+type IO struct {
+	Stdin    string
+	Stdout   string
+	Stderr   string
+	Terminal bool
+}
+
+type CreateOpts struct {
+	// Spec is the OCI runtime spec
+	Spec []byte
+	// Rootfs mounts to perform to gain access to the container's filesystem
+	Rootfs []Mount
+	// IO for the container's main process
+	IO IO
+}
+
+// Runtime is responsible for the creation of containers for a certain platform,
+// arch, or custom usage.
+type Runtime interface {
+	// Create creates a container with the provided id and options
+	Create(ctx context.Context, id string, opts CreateOpts) (Container, error)
+	// Containers returns all the current containers for the runtime
+	Containers() ([]Container, error)
+	// Delete returns the container in the runtime
+	Delete(ctx context.Context, c Container) error
+	// Events returns events for the runtime and all containers created by the runtime
+	Events(context.Context) <-chan *Event
+}