readProcessWithExitCode returns stdout/stderr as String, which forces GHC to decode raw bytes using the current locale encoding. In a Docker container with C locale (default), non-ASCII UTF-8 bytes (like 0xE2) cause 'invalid argument' errors. Replace with readProcessBytes which uses createProcess + hSetBinaryMode to capture stdout/stderr as raw lazy ByteStrings, bypassing locale decoding entirely. JSON is decoded directly from raw bytes via A.decode.
Roux
Roux is a personal/family recipe management site.
It's intended to be low friction for entering recipes and tracking when you've cooked them.
Cooklang
Roux uses Cooklang (https://cooklang.org/) as a source of truth for all recipe content. Any recipe either starts in Cooklang or is immediately converted to Cooklang by one mechanism or another.
Other details
Cook history
Roux lets you track when you cook recipes. I like this because we cook a lot of different recipes and I like to be able to go back to find things I liked in the past so I don't forget about them.
Technical details
Development environment
Docker is used for all development tools. Nothing is required to be installed on the local machine except Docker.
Backend API: Haskell + SQLite
Frontend: Static HTML + Pico CSS
The actual backing for recipes themselves is a single cooklang directory with an in-process search index that gets rebuilt whenever a file is added to the directory.
Project structure:
cooklang-hs
A Cooklang parser written in Haskell.
roux-server
The webserver for Roux. Parses Cooklang files on disk, indexes them, renders HTML templates for presenting recipes.