56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
package main
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import (
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"io"
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"os"
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"github.com/containerd/containerd/log"
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"github.com/urfave/cli"
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)
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// TODO(stevvooe): Create "multi-fetch" mode that just takes a remote
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// then receives object/hint lines on stdin, returning content as
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// needed.
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var fetchObjectCommand = cli.Command{
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Name: "fetch-object",
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Usage: "retrieve objects from a remote",
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ArgsUsage: "[flags] <remote> <object> [<hint>, ...]",
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Description: `Fetch objects by identifier from a remote.`,
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Flags: registryFlags,
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Action: func(context *cli.Context) error {
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var (
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ref = context.Args().First()
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)
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ctx, cancel := appContext(context)
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defer cancel()
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resolver, err := getResolver(ctx, context)
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if err != nil {
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return err
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}
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ctx = log.WithLogger(ctx, log.G(ctx).WithField("ref", ref))
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log.G(ctx).Infof("resolving")
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name, desc, err := resolver.Resolve(ctx, ref)
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if err != nil {
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return err
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}
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fetcher, err := resolver.Fetcher(ctx, name)
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if err != nil {
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return err
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}
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log.G(ctx).Infof("fetching")
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rc, err := fetcher.Fetch(ctx, desc)
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if err != nil {
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return err
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}
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defer rc.Close()
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_, err = io.Copy(os.Stdout, rc)
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return err
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},
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}
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