doccmd 2024.9.20

Run commands against code blocks in reStructuredText and Markdown files.

doccmd

A command line tool for running commands against documentation files.

• Installation

  • With pip

  • With Homebrew (macOS, Linux, WSL)

    • Pre-built Linux binaries

  • Using doccmd as a pre-commit hook

• Usage example

• What does it work on?

• Formatters and padding

• Full documentation

Installation

With pip

Requires Python 3.10+.

pip install doccmd

With Homebrew (macOS, Linux, WSL)

Requires Homebrew.

brew tap adamtheturtle/doccmd
brew install doccmd

Pre-built Linux binaries

$ curl --fail -L https://github.com/adamtheturtle/doccmd/releases/download/2024.09.18/doccmd -o /usr/local/bin/doccmd && \
$ chmod +x /usr/local/bin/doccmd

Using doccmd as a pre-commit hook

To run doccmd with pre-commit, add hooks like the following to your .pre-commit-config.yaml:

-   repo: https://github.com/adamtheturtle/doccmd-pre-commit
    rev: v2024.09.18
    hooks:
    -   id: doccmd
        args: ["--language", "shell", "--command", "shellcheck --shell=bash"]
        additional_dependencies: ["shellcheck-py"]

Usage example

# Run mypy against the Python code blocks in README.md and CHANGELOG.rst
$ doccmd --language=python --command="mypy" README.md CHANGELOG.rst

# Run gofmt against the Go code blocks in README.md
# This will modify the README.md file in place
$ doccmd --language=go --command="gofmt -w" README.md

# or type less...
$ doccmd -l python -c mypy README.md CHANGELOG.rst

What does it work on?

• reStructuredText (.rst)

.. code-block:: shell

   echo "Hello, world!"

.. code:: shell

   echo "Or this Hello, world!"

• Markdown (.md)

```shell
echo "Hello, world!"
```

• MyST (.md with MyST syntax)

```{code-block} shell
echo "Hello, world!"
```

```{code} shell
echo "Or this Hello, world!"
```

• Want more? Open an issue!

Formatters and padding

Running linters with doccmd gives you errors and warnings with line numbers that match the documentation file. It does this by adding padding to the code blocks before running the command.

Some tools do not work well with this padding, and you can choose to obscure the line numbers in order to give the tool the original code block’s content without padding, by using the --no-pad-file flag.

Full documentation

See the full documentation.