Entangled - Pandoc filters

This contains several Pandoc filters and scripts for literate programming in Markdown. These filters are enough to get you going with literate programming using Pandoc.

Install

Prerequisites

• Python >=3.7: All of these filters are written in Python. This is mainly to encourage as many users (I mean YOU) to start developing Pandoc filters.
• Dhall: the pandoc-bootstrap filter requires dhall-to-json to be installed: see Dhall language. TLDR: download dhall-json-*-[windows|macos|linux].[zip|tar.bz2] from the Dhall release page, and extract it to a location in your $PATH. Dhall is awesome, it will make your life better.

pip install entangled-filters

For development

To run tests, after doing a normal install (to get the executables installed), run

pip install --upgrade -e .[test]
pytest

The executables are auto-generated by the setup.py script and call some python -m command.

Supported syntax

See the project homepage for more info.

Named code blocks

``` {.python #hello}
print("Hello, World!")
```

Reference code blocks

``` {.python #main}
def main():
    <<hello>>
```

Define files

``` {.python file=hello.py}
<<main>>

if __name__ == "__main__":
    main()
```

Documentation tests

``` {.python .doctest #the-question}
6*7
---
42
```

pandoc-tangle

Extracts code blocks and writes them to files.

pandoc -t plain --filter pandoc-tangle hello.md

pandoc-annotate-codeblocks

Annotates code blocks in generated HTML or PDF output with name tags.

pandoc -t html5 -s --filter pandoc-anotate-codeblocks hello.md

pandoc-doctest

Runs doctests, and include results into output. Also annotates the code blocks (so no need to run pandoc-annotate-codeblocks).

pandoc -t html5 -s --filter pandoc-doctest hello.md

pandoc-bootstrap

Also annotates code blocks, and has two features:

• Expand a Dhall specification into a card deck for Bootstrap, that is a flex-box with a single row and several columns of cards. This is nice to have at the top of a page to draw attention to some key points.

• Collapsible/foldable code blocks. Add a .bootstrap-fold class to a code block to have the code block hidden behind a button. This is nice for some larger uninteresting code.

This filter should be used together with a Bootstrap template for Pandoc. An example of its use can be seen here: Chaotic Pendulum, with the source code at gh:jhidding/chaotic-pendulum.

Docker

The Entangled pandoc filters is available as a Docker image.

Run

In your current working directory with a README.md file run

docker run --rm -ti --user $UID -v $PWD:/data nlesc/pandoc-tangle README.md

This will extracts code blocks and writes them to files.

Build

docker build -t nlesc/pandoc-tangle .