pycog3

Simple, opinionated library for building Cog commands in Python3.

Usage

pycog3 combines information available in the Cog runtime environment with assumptions about Python project structure to simplify command development.

pycog3 includes a driver executable, bin/cog-command, which dynamically imports, instantiates, and runs Python command code based on the values of $COG_BUNDLE and $COG_COMMAND.

cog-command's magic requires that Python projects follow a strict directory layout (basic):

<bundle_name>
  |
  |-- <bundle_name>
       |-- __init__.py
       |-- commands
           |
           |-- __init__.py
           |-- <command1>.py
           |-- <command2>.py

pycog3 also supports more advanced, multi-level structure when using the - field separator in the command name. For example, defining:

• commands\commanda.py - maps to !commanda
• commands\level1\commandb.py - maps to !level1-commandb
• commands\level1\level2a\commandc.py - maps to !level1-level2a-commandb
• commands\level1\level2b\leveln\commandz.py - maps to !level1-level2b-leveln-commandz

<bundle_directory>
  |
  |-- <bundle_name>
       |-- __init__.py
       |-- commands
           |
           |-- __init__.py
           |-- <commanda>.py
           |-- <commandb>.py
           .
           .
           |-- <commandz>.py
           |
           |-- <level1>
                |
                |-- __init__.py
                |-- <commanda>.py
                |-- <commandb>.py
                .
                .
                |-- <commandz>.py
                |
                |-- <level2a>
                |    |
                |    |-- <commanda>.py
                |    |-- <commandb>.py
                |    |-- <commandc>.py
                |    .
                |    .
                |    |-- <commandz>.py
                |
                |-- <level2b>
                     |
                     |-- __init__.py
                     |-- <...>
                         |
                         |-- __init__.py
                         | -- <leveln>
                              |
                              |-- __init__.py
                              |-- <commanda>.py
                              |-- <commandb>.py
                              .
                              .
                              |-- <commandz>.py

The only requirement is a class with the same name of the filename should exist (first letter capital).

Examples

See the cog-bundles/statuspage repository for an example of this library in action.

If you're interested in the multi-level usage, check the cog-bundle pi-bundle or the test bundle in test/.

Installation

Add this line to your application's setup.py or requirements.txt:

pycog3>=0.1.28

TODO

• Add Cog service support
• Add transparent accumulation support a la cog-bundles/cog-rb