containerd/cmd/ctr/pull.go
Zhang Wei 14fe2d5f20 Add newline char to avoid mix of logs
Add a '\n' after "unpacking xxx..." to avoid mix of logs such as:

```
unpacking sha256:a7776895af32e34b1fef997e26c79fa988b40c5cf2a3fb48dc22e0584b648d82...DEBU[0005]
Extraction not needed, layer snapshot exists
DEBU[0005] Extraction not needed, layer snapshot exists
DEBU[0005] Extraction not needed, layer snapshot exists
DEBU[0005] Extraction not needed, layer snapshot exists
DEBU[0005] Extraction not needed, layer snapshot exists
DEBU[0005] Extraction not needed, layer snapshot exists
done
```

After this commit:

```
unpacking sha256:a7776895af32e34b1fef997e26c79fa988b40c5cf2a3fb48dc22e0584b648d82...
DEBU[0008] Extraction not needed, layer snapshot exists
DEBU[0008] Extraction not needed, layer snapshot exists
DEBU[0008] Extraction not needed, layer snapshot exists
DEBU[0008] Extraction not needed, layer snapshot exists
DEBU[0008] Extraction not needed, layer snapshot exists
DEBU[0008] Extraction not needed, layer snapshot exists
done
```

Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
2017-08-20 21:03:18 +08:00

46 lines
1.1 KiB
Go

package main
import (
"fmt"
"github.com/containerd/containerd/log"
"github.com/urfave/cli"
)
var pullCommand = cli.Command{
Name: "pull",
Usage: "pull an image from a remote",
ArgsUsage: "[flags] <ref>",
Description: `Fetch and prepare an image for use in containerd.
After pulling an image, it should be ready to use the same reference in a run
command. As part of this process, we do the following:
1. Fetch all resources into containerd.
2. Prepare the snapshot filesystem with the pulled resources.
3. Register metadata for the image.
`,
Flags: append(registryFlags, snapshotterFlags...),
Action: func(clicontext *cli.Context) error {
var (
ref = clicontext.Args().First()
)
ctx, cancel := appContext(clicontext)
defer cancel()
img, err := fetch(ctx, ref, clicontext)
if err != nil {
return err
}
log.G(ctx).WithField("image", ref).Debug("unpacking")
// TODO: Show unpack status
fmt.Printf("unpacking %s...\n", img.Target().Digest)
err = img.Unpack(ctx, clicontext.String("snapshotter"))
fmt.Println("done")
return err
},
}