CONTRIBUTING.md

Style guide: PEP-8 Python 2.7 + Python 3.4+ compatible code PEP-484 type hints, in comments for Python 2.7 compatability Vertically align the type hints in function definitions

In order to contribute to the development of cwltool, you need to install cwltool from source (preferably in a virtual environment): Here's a rough

• Install virtualenv via pip: pip install virtualenv
• Clone the cwltool: git clone https://github.com/common-workflow-language/cwltool.git
• Switch to cwltool directory: cd cwltool
• Create a virtual environment: virtualenv cwltool
• To begin using the virtual environment, it needs to be activated: source bin/activate
• To check if you have the virtual environment set up: which python and it should point to python executable in your virtual env
• Install cwltool in the virtual environment: pip install .
• Check the version which might be different from the version installed in general on any system: cwltool --version
• After you've made the changes, you can the complete test suite via tox: tox
  • If you want to run specific tests, say unit tests in Python 3.5, then: tox -e py35-unit.
  • Look at tox.ini for all available tests and runtimes
• If tests are passing, you can simply commit and create a PR on cwltool repo:
• After you're done working on the cwltool, you can deactivate the virtual environment: deactivate