kaos/underpants

Using Pants as an embedded rule engine

underpants - Or, using Pants as an embedded rule engine

DISCLAIMER: This is not in any way to show how to use Pants, or recommended patterns of use. Provided here AS-IS. No gurantees of any kind, as this may break with any future release of Pants.

This is a toy POC testing out the feasability of using the Pants Build System as a rule engine in your Python application.

It's also a test-bed for me to explore the intricacies of rule caching etc.

Expected output along the lines of:

$ ./pants run src/pants_rules/main.py
14:00:05.78 [INFO] Starting: pants_rules.demo.basic.answer_to_life_universe_and_everything
14:00:05.78 [INFO] Starting: pants_rules.demo.basic.reverse_input
== in reverse_input: InputData(text='answer')
14:00:05.78 [INFO] Completed: pants_rules.demo.basic.reverse_input
== data: OutputData(text='rewsna')
14:00:05.78 [INFO] Completed: pants_rules.demo.basic.answer_to_life_universe_and_everything
The result is: SimpleResult(answer=41)
14:00:06.29 [INFO] Starting: pants_rules.demo.basic.answer_to_life_universe_and_everything
== data: OutputData(text='rewsna')
14:00:06.29 [INFO] Completed: pants_rules.demo.basic.answer_to_life_universe_and_everything
The result is: SimpleResult(answer=42)
The result is: ProcResult(code=0, err=None)
The result is: ProcResult(code=1, err="proc 'fail' failed")

License

Provided under the MIT license, as "public domain" is not an OSI approved license.

Lockfile

To update the 3rdparty/requirements.lock file run:

./pants generate-lockfiles

Version

Use at your own peril: