Thermal beers

Print beer tickets when Gitlab tests break. The person with the most tickets treats the rest of the team.

Architecture

+----------+                  +---------------+
|  Gitlab  |----------------> | web-server.js |
+----------+  Webhook         +---------------+
                                ^
      +------------+            |
      | printer.js |------------+
      +------------+  ZeroMQ
        |              ________________
        |            _/_______________/|
        |           /___________/___//||
        |          |===        |----| ||
        |          |           |   ô| ||
        |          |___________|   ô| ||
        |          | ||/.´---.||    | ||
        +----------|-||/_____\||-.  | |´
          CUPS     |_||=L==H==||_|__|/

In our specific case, our Gitlab installation could not communicate directly with the machine that runs the printer. We therefore use a ZeroMQ socket to forward print jobs to a machine that is connected to the printer.

Usage

Part of the procedure common to both machines:

$ git clone ...
$ $EDITOR settings.js
$ npm install

Then on the machine that Gitlab can talk to:

$ node web-server.js

Then on the machine that can talk to the printer:

$ node printer.js

Finally, a Pipeline events Webhook must be configured in Gitlab.

Printer configuration

Nothing worked until we found https://github.com/rafael-freitas/zj-58.

Acknowledgment

• zj-58.js has been borrowed from https://github.com/rafael-freitas/node-thermal-printer.
• The ascii beer has been found on http://www.chris.com/ascii/index.php?art=food%20and%20drink/beer and was credited to Hilko Bengen.
• The ascii printer has been found on http://ascii.co.uk/art/printer and was credited to Jan Foerster