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import * as fs from 'node:fs'
import * as path from 'node:path'
import * as prettier from 'prettier'
/** Pairs of package labels and their corresponding paths */
type LabelerPair = [string, string]
function readPairsFromFs(): Array<LabelerPair> {
const ignored = new Set(['.DS_Store'])
const pairs: Array<LabelerPair> = []
// Add subfolders in the packages folder, i.e. packages/**
fs.readdirSync(path.resolve('packages'))
.filter((folder) => !ignored.has(folder))
.forEach((folder) => {
// Check if package.json exists for the folder before adding it
if (
fs.existsSync(
path.resolve(path.join('packages', folder, 'package.json')),
)
) {
pairs.push([`package: ${folder}`, `packages/${folder}/**/*`])
} else {
console.info(
`Skipping \`${folder}\` as it does not have a \`package.json\` file.`,
)
}
})
// Sort by package name in alphabetical order
pairs.sort((a, b) => a[0].localeCompare(b[0]))
return pairs
}
async function generateLabelerYaml(pairs: Array<LabelerPair>): Promise<string> {
function s(n = 1) {
return ' '.repeat(n)
}
// Convert the pairs into valid yaml
const formattedPairs = pairs
.map(([packageLabel, packagePath]) => {
const result = [
`'${packageLabel}':`,
`${s(2)}-${s(1)}changed-files:`,
`${s(4)}-${s(1)}any-glob-to-any-file:${s(1)}'${packagePath}'`,
].join('\n')
return result
})
.join('\n')
// Get the location of the Prettier config file
const prettierConfigPath = await prettier.resolveConfigFile()
if (!prettierConfigPath) {
throw new Error(
'No Prettier config file found. Please ensure you have a Prettier config file in your project.',
)
}
console.info('using prettier config file at:', prettierConfigPath)
// Resolve the Prettier config
const prettierConfig = await prettier.resolveConfig(prettierConfigPath)
console.info('using resolved prettier config:', prettierConfig)
// Format the YAML string using Prettier
const formattedStr = await prettier.format(formattedPairs, {
parser: 'yaml',
...prettierConfig,
})
return formattedStr
}
async function run() {
console.info('Generating labeler config...')
// Generate the pairs of package labels and their corresponding paths
const pairs = readPairsFromFs()
// Always add the docs folder
pairs.push(['documentation', 'docs/**/*'])
// Convert the pairs into valid yaml
const yamlStr = await generateLabelerYaml(pairs)
// Write to 'labeler-config.yml'
const configPath = path.resolve('labeler-config.yml')
fs.writeFileSync(configPath, yamlStr, {
encoding: 'utf-8',
})
console.info(`Generated labeler config at \`${configPath}\`!`)
return
}
try {
run().then(() => {
process.exit(0)
})
} catch (error) {
console.error('Error generating labeler config:', error)
process.exit(1)
}
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