Prettier, in Docker

You probably should not use this.

Purpose

Pocket-size (typically < 60 MB) Docker image, containing only Node.js and Prettier, which you will probably only use in CI environments.

Warning

Extremely fragile, uses the latest stable Alpine image, packaged Node.js and published Prettier npm package. Extracts dynamically linked Node.js libraries, and rewrites a bit of Prettier on the fly.

Build

docker build -t prettier .

Usage

# Mount the current directory as a volume and run Prettier in every JS file, recursively
docker run -it --rm -w /workspace -v "$PWD:/workspace" prettier --write "**/*.js"

Slimmer image still?

You may delete parsers for TypeScript (about 3.2 MB) or Flow (about 3.0 MB) during the builder phase. Is there really a point, though?