Something does not work and you wish to fix it? Are you curious to see how it works? For development:

# First install Nek5000
git clone https://github.com/snek5000/Nek5000.git
export NEK_SOURCE_ROOT=$PWD/Nek5000

git clone https://github.com/snek5000/snek5000.git

# Activate paths: Start here. Always!
cd snek5000
source activate.sh

Now you should setup a Python environment. There are two ways to do this (and it has to be done only once):

• Using venv

  python -m venv venv
  source venv/bin/activate

• Using conda

  conda env create -n env-snek5000
  conda activate env-snek5000

Finally, to install in development mode:

pip install pip-tools nox
nox -s pip-sync

• Editor: Use an editor which supports EditorConfig

• Style guide: For Python code, black, isort and flake8 are used to check and lint. Installing pre-commit would enforce the style automatically as a Git hook.

  pre-commit install

• Branching model: The development uses branches and pull-requests for experimental features. You may find the following Git branches when you clone snek5000:

  • main: main branch
  • fix/..., enh/...: feature branches

• Testing: Run pytest from the top-level directory. The test-cases can be found under tests/ directory. To run the slow tests too execute pytest --runslow.

• Debugging: Set the environment variable:

  export SNEK_DEBUG=true

  to activate debugging logs and longer tests.

Vim users could benefit by setting:

set secure exrc

This sources the .exrc file which comes along with the repository and enables syntax highlighting for file extensions used in Nek5000.