Spliterate is a disappointingly simple tool for literate programming using Markdown. You give it a Markdown file; it splits it into (a) a Markdown file with all the code blocks removed, and (b) a standalone file with just the code blocks' contents, stitched together.
It uses a real Markdown parser (Remark), not just the naive sed call, so it should Kinda Work™.
Install:
npm install -g spliterate
Split:
spliterate [-m out.md] [-c out.lang] in.md
By default, the tool will print the code contents to stdout. Use this mode if you just need to compile and execute the code from a Markdown document.
You can also use the -c FILE option to write the code contents to a file, and -m FILE to dump the code-free Markdown. If either or both of these is used, nothing is printed to stdout.
This is by Adrian Sampson. The license is MIT.