b518f11dba
Export as a tar (Note: "-" can be used for stdout):
$ ctr images export /tmp/oci-busybox.tar docker.io/library/busybox:latest
Import a tar (Note: "-" can be used for stdin):
$ ctr images import foo/new:latest /tmp/oci-busybox.tar
Note: media types are not converted at the moment: e.g.
application/vnd.docker.image.rootfs.diff.tar.gzip
-> application/vnd.oci.image.layer.v1.tar+gzip
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
65 lines
1.1 KiB
Go
65 lines
1.1 KiB
Go
package containerd
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import (
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"archive/tar"
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"io"
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"runtime"
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"testing"
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)
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// TestExport exports testImage as a tar stream
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func TestExport(t *testing.T) {
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// TODO: support windows
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if testing.Short() || runtime.GOOS == "windows" {
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t.Skip()
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}
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ctx, cancel := testContext()
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defer cancel()
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client, err := New(address)
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if err != nil {
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t.Fatal(err)
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}
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defer client.Close()
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pulled, err := client.Pull(ctx, testImage)
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if err != nil {
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t.Fatal(err)
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}
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exportedStream, err := client.Export(ctx, pulled.Target())
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if err != nil {
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t.Fatal(err)
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}
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assertOCITar(t, exportedStream)
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}
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func assertOCITar(t *testing.T, r io.Reader) {
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// TODO: add more assertion
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tr := tar.NewReader(r)
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foundOCILayout := false
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foundIndexJSON := false
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for {
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h, err := tr.Next()
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if err == io.EOF {
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break
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}
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if err != nil {
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t.Error(err)
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continue
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}
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if h.Name == "oci-layout" {
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foundOCILayout = true
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}
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if h.Name == "index.json" {
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foundIndexJSON = true
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}
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}
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if !foundOCILayout {
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t.Error("oci-layout not found")
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}
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if !foundIndexJSON {
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t.Error("index.json not found")
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}
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}
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