122 lines
3.1 KiB
Go
122 lines
3.1 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package containerd
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import (
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"context"
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"io"
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"github.com/containerd/containerd/errdefs"
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"github.com/containerd/containerd/images"
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ocispec "github.com/opencontainers/image-spec/specs-go/v1"
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)
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type importOpts struct {
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}
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// ImportOpt allows the caller to specify import specific options
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type ImportOpt func(c *importOpts) error
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func resolveImportOpt(opts ...ImportOpt) (importOpts, error) {
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var iopts importOpts
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for _, o := range opts {
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if err := o(&iopts); err != nil {
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return iopts, err
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}
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}
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return iopts, nil
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}
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// Import imports an image from a Tar stream using reader.
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// Caller needs to specify importer. Future version may use oci.v1 as the default.
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// Note that unreferrenced blobs may be imported to the content store as well.
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func (c *Client) Import(ctx context.Context, importer images.Importer, reader io.Reader, opts ...ImportOpt) ([]Image, error) {
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_, err := resolveImportOpt(opts...) // unused now
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if err != nil {
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return nil, err
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}
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ctx, done, err := c.WithLease(ctx)
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if err != nil {
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return nil, err
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}
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defer done(ctx)
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imgrecs, err := importer.Import(ctx, c.ContentStore(), reader)
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if err != nil {
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// is.Update() is not called on error
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return nil, err
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}
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is := c.ImageService()
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var images []Image
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for _, imgrec := range imgrecs {
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if updated, err := is.Update(ctx, imgrec, "target"); err != nil {
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if !errdefs.IsNotFound(err) {
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return nil, err
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}
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created, err := is.Create(ctx, imgrec)
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if err != nil {
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return nil, err
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}
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imgrec = created
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} else {
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imgrec = updated
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}
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images = append(images, &image{
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client: c,
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i: imgrec,
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})
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}
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return images, nil
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}
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type exportOpts struct {
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}
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// ExportOpt allows the caller to specify export-specific options
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type ExportOpt func(c *exportOpts) error
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func resolveExportOpt(opts ...ExportOpt) (exportOpts, error) {
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var eopts exportOpts
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for _, o := range opts {
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if err := o(&eopts); err != nil {
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return eopts, err
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}
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}
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return eopts, nil
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}
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// Export exports an image to a Tar stream.
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// OCI format is used by default.
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// It is up to caller to put "org.opencontainers.image.ref.name" annotation to desc.
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// TODO(AkihiroSuda): support exporting multiple descriptors at once to a single archive stream.
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func (c *Client) Export(ctx context.Context, exporter images.Exporter, desc ocispec.Descriptor, opts ...ExportOpt) (io.ReadCloser, error) {
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_, err := resolveExportOpt(opts...) // unused now
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if err != nil {
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return nil, err
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}
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pr, pw := io.Pipe()
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go func() {
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pw.CloseWithError(exporter.Export(ctx, c.ContentStore(), desc, pw))
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}()
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return pr, nil
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}
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