sim/scripts/format-generated-source.ts at main · simstudioai/sim

Repository navigation

import { spawnSync } from 'node:child_process'

import { extname, join } from 'node:path'

import { localBin } from './local-bin'

const MAX_FORMATTED_SOURCE_BYTES = 16 * 1024 * 1024

export function formatGeneratedSource(source: string, stdinFilePath: string, cwd: string): string {

// biome.json excludes the generated output dirs, and biome refuses to format a

// stdin whose declared path is excluded — so declare a neutral path instead;

// formatting rules do not vary by location, only ignores do. The caller's

// extension survives, because it is what biome parses the stdin as — a .json

// document declared as .ts aborts with a parse error, not a format.

const neutralPath = join(

cwd,

'scripts',

`.generated-format-buffer${extname(stdinFilePath) || '.ts'}`

)

const result = spawnSync(

localBin('biome'),

['format', '--stdin-file-path', neutralPath, `--files-max-size=${MAX_FORMATTED_SOURCE_BYTES}`],

{

cwd,

encoding: 'utf8',

input: source,

maxBuffer: MAX_FORMATTED_SOURCE_BYTES,

}

)

if (result.error || result.status !== 0) {

throw new Error(

`Failed to format generated source for ${neutralPath}:\n${

result.error?.message || result.stderr || result.stdout || 'unknown error'

)

}

if (source.trim() && !result.stdout.trim()) {

throw new Error(`Formatter returned empty output for ${neutralPath}:\n${result.stderr}`)

}

return result.stdout

}