Lib-HaL9k 0.6.1

The HackerLab 9000 Controller Library.

lib_hal9k

The HackerLab 9000 controller library.

(Note: This project is unaffiliated with the Android Mod which goes by the name Hal9k.)

Lingo

This library is designed to provide the simplest possible API for controlling VirtualBox VMs, without any of the fancy stuff. There are only three actions we care about:

• Starting the VM.
• Stopping the VM.
• Reverting the VM to the most recent snapshot.

This functionality is similar to that of a basic music player, which provides a familiar metaphor. In the language of this library, a VM is a "Track," which you can "play," "rewind," or "stop."

The Meta controller can list and retrieve tracks.

Demo

>>> from hal9k import Meta
>>> # Instantiate a Meta controller.
>>> meta = Meta()
>>> # Retrieve a track listing.
>>> meta.get_tracks()
['Debian 9.12 x64 (BASE)', 'Windows 8 x64 (BASE)', 'MSEdge - Win10 (BASE)', 'Debian 10.3 x64 (BASE)']
>>> # Instantiate a Track controller.
>>> track = meta.fetch('Debian 9.12 x64 (BASE)')
>>> # Start the track.
>>> track.play()
>>> # Check that it's running.
>>> track.status()
1
>>> # Stop the track.
>>> track.stop()
>>> # Check that it's stopped.
>>> track.status()
0
>>> # Rewind the track.
>>> track.rewind()

How it Works

The Meta.get_tracks function returns a list of the names of all VMs which have a PRODUCTION snapshot defined. The Track.rewind function restores the track's PRODUCTION snapshot. There can be only one PRODUCTION shapshot for each VM. If you decide to make a new PRODUCTION snapshot, be sure to delete the one previous. Any VMs lacking a PRODUCTION snapshot will be invisible to hal9k.

An exception will be raised for Track.play and Track.rewind if the track is already playing. Likewise for Track.stop if the track is already stopped. Tracks must be stopped before using Track.play or Track.rewind, and tracks must be playing before using Track.stop.

Changelog

• 0.6.1 :: Updated Meta.get_tracks function to list only production-ready VMs.
• 0.6.0 :: Added rewind function to Track class.
• 0.5.0 :: Added status function to Track class.
• 0.4.0 :: Added stop function to Track class.
• 0.3.0 :: Added Track class with play function.
• 0.2.0 :: Added fetch function to Meta class.
• 0.1.0 :: Added Meta class with get_tracks function.