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Refactor pull client code into client.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| package ipcs | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
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| "github.com/containerd/containerd" | ||
| "github.com/containerd/containerd/errdefs" | ||
| "github.com/containerd/containerd/images" | ||
| "github.com/containerd/containerd/platforms" | ||
| "github.com/containerd/containerd/remotes" | ||
| iface "github.com/ipfs/interface-go-ipfs-core" | ||
| ocispec "github.com/opencontainers/image-spec/specs-go/v1" | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
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| type Client struct { | ||
| ipfsCln iface.CoreAPI | ||
| ctrdCln *containerd.Client | ||
| ipcs *store | ||
| } | ||
|
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| func NewClient(ipfsCln iface.CoreAPI, ctrdCln *containerd.Client) *Client { | ||
| return &Client{ | ||
| ipfsCln: ipfsCln, | ||
| ctrdCln: ctrdCln, | ||
| ipcs: &store{ | ||
| cln: ipfsCln, | ||
| }, | ||
| } | ||
| } | ||
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| func (c *Client) Pull(ctx context.Context, ref string, desc ocispec.Descriptor) (containerd.Image, error) { | ||
| ctx, done, err := c.ctrdCln.WithLease(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer done(ctx) | ||
|
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| img, err := c.Fetch(ctx, ref, desc) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| i := containerd.NewImageWithPlatform(c.ctrdCln, img, platforms.Default()) | ||
|
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| if err := i.Unpack(ctx, containerd.DefaultSnapshotter); err != nil { | ||
| return nil, errors.Wrapf(err, "failed to unpack image on snapshotter %s", containerd.DefaultSnapshotter) | ||
| } | ||
|
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| return i, nil | ||
| } | ||
|
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| func (c *Client) Fetch(ctx context.Context, ref string, desc ocispec.Descriptor) (images.Image, error) { | ||
| store := c.ctrdCln.ContentStore() | ||
| fetcher := c.ipcs | ||
|
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| // Get all the children for a descriptor | ||
| childrenHandler := images.ChildrenHandler(store) | ||
| // Set any children labels for that content | ||
| childrenHandler = images.SetChildrenLabels(store, childrenHandler) | ||
| // Filter children by platforms | ||
| childrenHandler = images.FilterPlatforms(childrenHandler, platforms.Default()) | ||
| // Sort and limit manifests if a finite number is needed | ||
| childrenHandler = images.LimitManifests(childrenHandler, platforms.Default(), 1) | ||
|
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| handler := images.Handlers( | ||
| remotes.FetchHandler(store, fetcher), | ||
| childrenHandler, | ||
| ) | ||
|
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| if err := images.Dispatch(ctx, handler, desc); err != nil { | ||
| return images.Image{}, err | ||
| } | ||
|
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| img := images.Image{ | ||
| Name: ref, | ||
| Target: desc, | ||
| } | ||
|
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| is := c.ctrdCln.ImageService() | ||
| for { | ||
| if created, err := is.Create(ctx, img); err != nil { | ||
| if !errdefs.IsAlreadyExists(err) { | ||
| return images.Image{}, err | ||
| } | ||
|
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| updated, err := is.Update(ctx, img) | ||
| if err != nil { | ||
| // if image was removed, try create again | ||
| if errdefs.IsNotFound(err) { | ||
| continue | ||
| } | ||
| return images.Image{}, err | ||
| } | ||
|
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| img = updated | ||
| } else { | ||
| img = created | ||
| } | ||
|
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| return img, nil | ||
| } | ||
| } | ||
|
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| func (c *Client) Push(ctx context.Context, ref string, desc ocispec.Descriptor) error { | ||
| return nil | ||
| } |
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