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CONTRIBUTING.md

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Contributing

This file is for contributors. It describes how the stars-testing-intro site is set-up and quality controlled.

Linting

Simply run from terminal:

bash lint.sh

Example code

The example code is contained in examples.

We want to be able to show individual functions without imports in the quarto website, so we have a script tools/extract_snippets.py which extracts each function without imports into individual .py files within pages/code/. This is run each time the site is built via Quarto's pre-render hook.

Example commands for the python package:

  • pip install -e examples/python_package
  • pytest examples/python_package

Example commands for the R package (having first opened R console by running R - escaped with quit()):

  • devtools::document("examples/r_package")
  • devtools::check("examples/r_package")
  • withr::with_dir("examples/r_package", {usethis::use_mit_license()})
  • devtools::test("examples/r_package")

Rendering the quarto site

The site is hosted on GitHub pages and rendered via GitHub actions. It uses a Docker environment which has the Python and R requirements.

If you wish to render it locally, please refer to the environment.yaml and renv.lock files.

Common reticulate error and solution

When rendering a Quarto document containing executable python code with reticulate, you might encounter:

Error in `use_condaenv()`:
! Unable to locate conda environment 'des-rap-book'.
Backtrace:
    ▆
 1. └─reticulate::use_condaenv("des-rap-book", required = TRUE)

This can occur when multiple Conda or Mamba installations exist (e.g. mambgaforge, miniconda3), or if R is using a different search path than the shell. By default, reticulate only looks in one location for environments, which can cause problems when environments are not where reticulate expects.

To fix this, set the RETICULATE_CONDA environment variable to the correct Conda or Mamba executable. To find the path to your executable, run:

conda env list

Look for your environment in the list. For example, if your environment is at /home/amy/mambaforge/envs/des-rap-book, then your Conda executable is likely at /home/amy/mambaforge/bin/conda.

Set the environment variable like so:

export RETICULATE_CONDA=/home/amy/mambaforge/bin/conda

Now render your book:

quarto render

To avoid needing to set RETICULATE_CONDA every time you open a new terminal, add the export command to an .Renviron file in your project directory. This file is not tracked by Git, and is specific to you. Create the file and add:

RETICULATE_CONDA=/home/amy/mambaforge/bin/conda