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