85 lines
2.4 KiB
TypeScript
85 lines
2.4 KiB
TypeScript
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import path from 'path'
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import { fileExists } from '../lib/file-exists'
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import { NextConfigComplete } from '../server/config-shared'
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import * as Log from './output/log'
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import { getTypeScriptConfiguration } from '../lib/typescript/getTypeScriptConfiguration'
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import { readFileSync } from 'fs'
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import isError from '../lib/is-error'
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import { codeFrameColumns } from 'next/dist/compiled/babel/code-frame'
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let TSCONFIG_WARNED = false
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function parseJsonFile(filePath: string) {
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const JSON5 = require('next/dist/compiled/json5')
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const contents = readFileSync(filePath, 'utf8')
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// Special case an empty file
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if (contents.trim() === '') {
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return {}
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}
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try {
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return JSON5.parse(contents)
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} catch (err) {
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if (!isError(err)) throw err
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const codeFrame = codeFrameColumns(
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String(contents),
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{
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start: {
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line: (err as Error & { lineNumber?: number }).lineNumber || 0,
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column: (err as Error & { columnNumber?: number }).columnNumber || 0,
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},
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},
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{ message: err.message, highlightCode: true }
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)
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throw new Error(`Failed to parse "${filePath}":\n${codeFrame}`)
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}
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}
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export default async function loadJsConfig(
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dir: string,
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config: NextConfigComplete
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) {
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let typeScriptPath: string | undefined
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try {
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typeScriptPath = require.resolve('typescript', { paths: [dir] })
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} catch (_) {}
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const tsConfigPath = path.join(dir, config.typescript.tsconfigPath)
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const useTypeScript = Boolean(
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typeScriptPath && (await fileExists(tsConfigPath))
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)
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let jsConfig
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// jsconfig is a subset of tsconfig
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if (useTypeScript) {
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if (
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config.typescript.tsconfigPath !== 'tsconfig.json' &&
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TSCONFIG_WARNED === false
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) {
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TSCONFIG_WARNED = true
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Log.info(`Using tsconfig file: ${config.typescript.tsconfigPath}`)
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}
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const ts = (await Promise.resolve(
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require(typeScriptPath!)
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)) as typeof import('typescript')
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const tsConfig = await getTypeScriptConfiguration(ts, tsConfigPath, true)
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jsConfig = { compilerOptions: tsConfig.options }
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}
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const jsConfigPath = path.join(dir, 'jsconfig.json')
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if (!useTypeScript && (await fileExists(jsConfigPath))) {
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jsConfig = parseJsonFile(jsConfigPath)
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}
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let resolvedBaseUrl
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if (jsConfig?.compilerOptions?.baseUrl) {
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resolvedBaseUrl = path.resolve(dir, jsConfig.compilerOptions.baseUrl)
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}
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return {
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useTypeScript,
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jsConfig,
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resolvedBaseUrl,
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}
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}
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