Added Docker and Vagrant support

[Manouchehri]

Example usage:

mbp:lglaf dave$ vagrant up
Bringing machine 'default' up with 'vmware_fusion' provider...
==> default: Cloning VMware VM: 'bento/ubuntu-16.04'. This can take some time...
==> default: Checking if box 'bento/ubuntu-16.04' is up to date...
==> default: Verifying vmnet devices are healthy...
==> default: Preparing network adapters...
==> default: Starting the VMware VM...
==> default: Waiting for the VM to receive an address...
==> default: Waiting for machine to boot. This may take a few minutes...
==> default: Machine booted and ready!
==> default: Configuring network adapters within the VM...
==> default: Waiting for HGFS to become available...
==> default: Enabling and configuring shared folders...
    default: -- /Users/dave/lglaf: /vagrant
==> default: Running provisioner: docker...
    default: Installing Docker onto machine...
==> default: Starting Docker containers...
==> default: -- Container: thawsystems/lglaf
mbp:lglaf dave$ vagrant ssh
vagrant@vagrant:~$ docker attach lglaf
vagrant@vagrant:~$ docker attach lglaf
root@14d9056e4d77:~# lglaf.py
No handlers could be found for logger "LGLAF.py"
LGLAF.py by Peter Wu (https://lekensteyn.nl/lglaf)
Type a shell command to execute or "exit" to leave.
# whoami
root
# id
uid=0(root) gid=0(root) groups=0(root) context=u:r:kernel:s0

[Lekensteyn]

this || true looks wrong.

Since you have an isolated container anyway, you could also consider a chgrp lglaf /dev/usb/*/* I guess.

[Manouchehri]

That's just so Dockerhub doesn't bail out on building.

Won't that break hotplugging?

[Lekensteyn]

I hoped that inotify works also in Docker containers, then you do not need any udevadm command. If you can do hotplugging, try checking for events with udevadm monitor while your container has started.

[Manouchehri]

udevadm monitor sees the kernel plug events, but doesn't apply udev rules. udev seems to refuse since it detects that it's a container.