tldraw/scripts/lib/file.ts
2023-04-25 12:01:25 +01:00

81 lines
2.2 KiB
TypeScript

import { readFile, writeFile as writeFileUnchecked } from 'fs/promises'
import { basename, dirname, join, relative } from 'path'
import prettier from 'prettier'
import { fileURLToPath } from 'url'
const __filename = fileURLToPath(import.meta.url)
const __dirname = dirname(__filename)
const isBublic = basename(join(__dirname, '../..')) === 'bublic'
export const REPO_ROOT = join(__dirname, isBublic ? '../../..' : '../..')
export const BUBLIC_ROOT = join(__dirname, '../..')
export async function readJsonIfExists(file: string) {
try {
return JSON.parse(await readFile(file, 'utf8'))
} catch {
return null
}
}
export async function readFileIfExists(file: string) {
try {
return await readFile(file, 'utf8')
} catch {
return null
}
}
const prettierConfigPromise = prettier.resolveConfig(__dirname)
export async function writeTypescriptFile(filePath: string, code: string) {
const formattedCode = prettier.format(
`
// This file is automatically generated by scripts/refresh-assets.ts.
// Do not edit manually.
${code}
`,
{
...(await prettierConfigPromise),
parser: 'typescript',
}
)
await writeStringFile(filePath, formattedCode)
}
export async function writeStringFile(filePath: string, contents: string) {
await writeFile(filePath, Buffer.from(contents, 'utf-8'))
}
export async function writeFile(filePath: string, contents: Buffer) {
if (process.env.CI) {
let existingContents: Buffer | null = null
try {
existingContents = await readFile(filePath)
} catch {
// Ignore
}
if (existingContents && !existingContents.equals(contents)) {
console.log(
`Asset file ${relative(
REPO_ROOT,
filePath
)} has changed. Please run this script again and commit the changes.`
)
console.log('Contents before:')
console.log(existingContents.toString('utf-8'))
console.log('\nContents after:')
console.log(contents.toString('utf-8'))
process.exit(1)
}
}
await writeFileUnchecked(filePath, contents, 'utf-8')
}
export async function writeJsonFile(filePath: string, contents: unknown) {
const formattedJson = prettier.format(JSON.stringify(contents, null, '\t'), {
...(await prettierConfigPromise),
parser: 'json',
})
await writeStringFile(filePath, formattedJson)
}