1a10211e3f
We should never return a nil context because of the way this function is typically used... e.g. ``` ctx, done, err := containerd.WithLease(ctx) ``` If there is an error `ctx` will be nil and any error handling may cause an NPE if it tries to use `ctx`. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package images
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import (
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"fmt"
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"github.com/containerd/containerd/cmd/ctr/commands"
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"github.com/containerd/containerd/errdefs"
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"github.com/containerd/containerd/leases"
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"github.com/containerd/containerd/mount"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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)
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var unmountCommand = cli.Command{
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Name: "unmount",
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Usage: "unmount the image from the target",
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ArgsUsage: "[flags] <target>",
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Description: "Unmount the image rootfs from the specified target.",
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Flags: append(append(commands.RegistryFlags, append(commands.SnapshotterFlags, commands.LabelFlag)...),
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cli.BoolFlag{
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Name: "rm",
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Usage: "remove the snapshot after a successful unmount",
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},
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),
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Action: func(context *cli.Context) error {
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var (
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target = context.Args().First()
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)
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if target == "" {
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return fmt.Errorf("please provide a target path to mount to")
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}
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client, ctx, cancel, err := commands.NewClient(context)
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if err != nil {
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return err
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}
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defer cancel()
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if err := mount.UnmountAll(target, 0); err != nil {
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return err
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}
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if context.Bool("rm") {
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snapshotter := context.String("snapshotter")
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s := client.SnapshotService(snapshotter)
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if err := client.LeasesService().Delete(ctx, leases.Lease{ID: target}); err != nil && !errdefs.IsNotFound(err) {
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return errors.Wrap(err, "error deleting lease")
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}
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if err := s.Remove(ctx, target); err != nil && !errdefs.IsNotFound(err) {
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return errors.Wrap(err, "error removing snapshot")
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}
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}
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fmt.Fprintln(context.App.Writer, target)
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return nil
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},
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}
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