move Exports method to export.go files

kadisi · kadisi · commit c11e2b8d44e1 · 2018-09-10T17:13:44.000+08:00
Signed-off-by: Jie Zhang &lt;iamkadisi@163.com&gt;
diff --git a/export.go b/export.go
@@ -0,0 +1,57 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package containerd
+
+import (
+	"context"
+	"io"
+
+	"github.com/containerd/containerd/images"
+	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
+)
+
+type exportOpts struct {
+}
+
+// ExportOpt allows the caller to specify export-specific options
+type ExportOpt func(c *exportOpts) error
+
+func resolveExportOpt(opts ...ExportOpt) (exportOpts, error) {
+	var eopts exportOpts
+	for _, o := range opts {
+		if err := o(&eopts); err != nil {
+			return eopts, err
+		}
+	}
+	return eopts, nil
+}
+
+// Export exports an image to a Tar stream.
+// OCI format is used by default.
+// It is up to caller to put "org.opencontainers.image.ref.name" annotation to desc.
+// TODO(AkihiroSuda): support exporting multiple descriptors at once to a single archive stream.
+func (c *Client) Export(ctx context.Context, exporter images.Exporter, desc ocispec.Descriptor, opts ...ExportOpt) (io.ReadCloser, error) {
+	_, err := resolveExportOpt(opts...) // unused now
+	if err != nil {
+		return nil, err
+	}
+	pr, pw := io.Pipe()
+	go func() {
+		pw.CloseWithError(exporter.Export(ctx, c.ContentStore(), desc, pw))
+	}()
+	return pr, nil
+}
diff --git a/import.go b/import.go
@@ -22,7 +22,6 @@ import (
 
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/images"
-	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
 type importOpts struct {
@@ -84,35 +83,3 @@ func (c *Client) Import(ctx context.Context, importer images.Importer, reader io
 	}
 	return images, nil
 }
-
-type exportOpts struct {
-}
-
-// ExportOpt allows the caller to specify export-specific options
-type ExportOpt func(c *exportOpts) error
-
-func resolveExportOpt(opts ...ExportOpt) (exportOpts, error) {
-	var eopts exportOpts
-	for _, o := range opts {
-		if err := o(&eopts); err != nil {
-			return eopts, err
-		}
-	}
-	return eopts, nil
-}
-
-// Export exports an image to a Tar stream.
-// OCI format is used by default.
-// It is up to caller to put "org.opencontainers.image.ref.name" annotation to desc.
-// TODO(AkihiroSuda): support exporting multiple descriptors at once to a single archive stream.
-func (c *Client) Export(ctx context.Context, exporter images.Exporter, desc ocispec.Descriptor, opts ...ExportOpt) (io.ReadCloser, error) {
-	_, err := resolveExportOpt(opts...) // unused now
-	if err != nil {
-		return nil, err
-	}
-	pr, pw := io.Pipe()
-	go func() {
-		pw.CloseWithError(exporter.Export(ctx, c.ContentStore(), desc, pw))
-	}()
-	return pr, nil
-}
