oci package passing tests

Signed-off-by: Daniel Nephin <dnephin@gmail.com>

oci/spec.go

@@ -0,0 +1,23 @@
+package oci
+
+import (
+	"context"
+
+	"github.com/containerd/containerd/containers"
+	specs "github.com/opencontainers/runtime-spec/specs-go"
+)
+
+// GenerateSpec will generate a default spec from the provided image
+// for use as a containerd container
+func GenerateSpec(ctx context.Context, client Client, c *containers.Container, opts ...SpecOpts) (*specs.Spec, error) {
+	s, err := createDefaultSpec(ctx, c.ID)
+	if err != nil {
+		return nil, err
+	}
+	for _, o := range opts {
+		if err := o(ctx, client, c, s); err != nil {
+			return nil, err
+		}
+	}
+	return s, nil
+}