71 lines
1.2 KiB
Go
71 lines
1.2 KiB
Go
// +build !windows
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package snapshot
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import (
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"io/ioutil"
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"os"
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"syscall"
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"github.com/containerd/containerd/mount"
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"github.com/pkg/errors"
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)
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func (lm *localMounter) Mount() (string, error) {
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lm.mu.Lock()
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defer lm.mu.Unlock()
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if lm.mounts == nil {
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mounts, release, err := lm.mountable.Mount()
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if err != nil {
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return "", err
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}
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lm.mounts = mounts
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lm.release = release
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}
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if len(lm.mounts) == 1 && (lm.mounts[0].Type == "bind" || lm.mounts[0].Type == "rbind") {
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ro := false
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for _, opt := range lm.mounts[0].Options {
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if opt == "ro" {
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ro = true
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break
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}
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}
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if !ro {
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return lm.mounts[0].Source, nil
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}
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}
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dir, err := ioutil.TempDir("", "buildkit-mount")
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if err != nil {
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return "", errors.Wrap(err, "failed to create temp dir")
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}
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if err := mount.All(lm.mounts, dir); err != nil {
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os.RemoveAll(dir)
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return "", errors.Wrapf(err, "failed to mount %s: %+v", dir, lm.mounts)
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}
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lm.target = dir
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return dir, nil
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}
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func (lm *localMounter) Unmount() error {
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lm.mu.Lock()
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defer lm.mu.Unlock()
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if lm.target != "" {
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if err := mount.Unmount(lm.target, syscall.MNT_DETACH); err != nil {
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return err
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}
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os.RemoveAll(lm.target)
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lm.target = ""
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}
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if lm.release != nil {
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return lm.release()
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}
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return nil
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}
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