// setupLock is used to setup a new Lock given the API client,
// the key prefix to operate on, and an optional session name.
func (c *LockCommand) setupLock(client *api.Client, prefix, name string) (*LockUnlock, error) {
// Use the DefaultSemaphoreKey extension, this way if a lock and
// semaphore are both used at the same prefix, we will get a conflict
// which we can report to the user.
key := path.Join(prefix, api.DefaultSemaphoreKey)
if c.verbose {
c.Ui.Info(fmt.Sprintf("Setting up lock at path: %s", key))
}
opts := api.LockOptions{
Key: key,
SessionName: name,
}
l, err := client.LockOpts(&opts)
if err != nil {
return nil, err
}
lu := &LockUnlock{
lockFn: l.Lock,
unlockFn: l.Unlock,
cleanupFn: l.Destroy,
inUseErr: api.ErrLockInUse,
}
return lu, nil
}
