Run formatting virtually

[sitole]

Hello,
i have special use case for Biome.js.
We are dynamically generating codebase for our clients and allowing them to download it.

In project boilerplate we are adding our configuration for biome and would be nice to download code already with formatted files,
problem is that code is build dynamically (not just putting or removing files but also adding JSX elements dynamically into files in some builder stage). In final stage codebase is simply represented as map of files with its content and in that point i would like to apply biome formatting on it.

My only idea is to temporarily persist this codebase on drive, call Biome on it and then scrape formatted files back to memory. Is there better solution? Iam okay with accessing Biome API directly not via CLI interface (if it's possible and some binding for JavaScript is done).

Thank you for your ideas!

[sitole]

Looks like biome supports format command with pipe containing code, you just need to provide filename to guess proper file type (in our case suitable). Whole call then will look like echo 'let a;' | biome format --stdin-file-path=file.js

https://biomejs.dev/reference/cli/#biome-format

[sitole]

If someone is curious it can be done by simple setup like this

const filename = 'example.tsx'
const content = 'const Hello = () => { return "Hello World" }'

const pathToBiome = 'path/to/package'
const pathToBinary = path.Join(pathToBiome, 'bin/biome')

// would be nice to add support for custom config
const formattedCode = execSync(`${pathToBinary} format --stdin-file-path=${filename}`, { input: content }).toString()