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Building PEPs Locally

Whilst editing a PEP, it is useful to review the rendered output locally. This can also be used to check that the PEP is valid reStructuredText before submission to the PEP editors.

The rest of this document assumes you are working from a local clone of the PEPs repository, with Python 3.9 or later installed.

Render PEPs locally

  1. Install requirements

    $ python -m venv venv
$ . venv/bin/activate
(venv) $ python -m pip install --upgrade pip
(venv) $ python -m pip install -r requirements.txt

  2. (Optional) Delete prior build files. Generally only needed when changing the rendering system itself.

    $ rm -rf build

  3. Run the build script:

    (venv) $ make sphinx

    If you don't have access to make, run:

    (venv) PS> python build.py -j 8

    Caution!

    There may be a series of warnings about unreferenced citations or labels -- whilst these are valid warnings they do not impact the build process.

  4. Navigate to the build directory of your PEPs repo to find the HTML pages. PEP 0 provides a formatted index, and may be a useful reference.

build.py tools

Several additional tools can be run through build.py, or the Makefile.

Check links

Check the validity of links within PEP sources (runs the Sphinx linkchecker)

(venv) $ python build.py --check-links
(venv) $ make check-links

Stricter rendering

Run in nit-picky mode. This generates warnings for all missing references.

(venv) $ python build.py --nitpicky

Fail the build on any warning. As of January 2022 there are around 250 warnings when building the PEPs.

(venv) $ python build.py --fail-on-warning
(venv) $ make fail-warning

All arguments to build.py

Renderers:

-f or --build-files
Renders PEPs to pep-XXXX.html files (Default)
-d or --build-dirs
Renders PEPs to index.html files within pep-XXXX directories

Options:

-i or --index-file
Copies PEP 0 to a base index file
-j or --jobs
How many parallel jobs to run (if supported). Integer, default 1
-n or --nitpicky
Runs Sphinx in nitpicky mode
-w or --fail-on-warning
Fails Sphinx on warnings

Tools:

-l or --check-links
Checks validity of links within PEP sources