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{ promises as fs } from 'fs'\nimport chalk from 'chalk'\nimport * as CommentJson from 'next/dist/compiled/comment-json'\nimport os from 'os'\nimport { getTypeScriptConfiguration } from './getTypeScriptConfiguration'\n\ntype DesiredCompilerOptionsShape = {\n [key: string]:\n | { suggested: any }\n | {\n parsedValue?: any\n parsedValues?: Array<any>\n value: any\n reason: string\n }\n}\n\nfunction getDesiredCompilerOptions(\n ts: typeof import('typescript')\n): DesiredCompilerOptionsShape {\n const o: DesiredCompilerOptionsShape = {\n // These are suggested values and will be set when not present in the\n // tsconfig.json\n target: { suggested: 'es5' },\n lib: { suggested: ['dom', 'dom.iterable', 'esnext'] },\n allowJs: { suggested: true },\n skipLibCheck: { suggested: true },\n strict: { suggested: false },\n forceConsistentCasingInFileNames: { suggested: true },\n noEmit: { suggested: true },\n\n // These values are required and cannot be changed by the user\n // Keep this in sync with the webpack config\n // 'parsedValue' matches the output value from ts.parseJsonConfigFileContent()\n esModuleInterop: {\n value: true,\n reason: 'requirement for babel',\n },\n module: {\n parsedValue: ts.ModuleKind.ESNext,\n // All of these values work:\n parsedValues: [\n ts.ModuleKind.ES2020,\n ts.ModuleKind.ESNext,\n ts.ModuleKind.CommonJS,\n ts.ModuleKind.AMD,\n ],\n value: 'esnext',\n reason: 'for dynamic import() support',\n },\n moduleResolution: {\n parsedValue: ts.ModuleResolutionKind.NodeJs,\n value: 'node',\n reason: 'to match webpack resolution',\n },\n resolveJsonModule: { value: true, reason: 'to match webpack resolution' },\n isolatedModules: {\n value: true,\n reason: 'requirement for babel',\n },\n jsx: {\n parsedValue: ts.JsxEmit.Preserve,\n value: 'preserve',\n reason: 'next.js implements its own optimized jsx transform',\n },\n }\n\n return o\n}\n\nexport function getRequiredConfiguration(\n ts: typeof import('typescript')\n): Partial<import('typescript').CompilerOptions> {\n const res: Partial<import('typescript').CompilerOptions> = {}\n\n const desiredCompilerOptions = getDesiredCompilerOptions(ts)\n for (const optionKey of Object.keys(desiredCompilerOptions)) {\n const ev = desiredCompilerOptions[optionKey]\n if (!('value' in ev)) {\n continue\n }\n res[optionKey] = ev.parsedValue ?? ev.value\n }\n\n return res\n}\n\nexport async function writeConfigurationDefaults(\n ts: typeof import('typescript'),\n tsConfigPath: string,\n isFirstTimeSetup: boolean\n): Promise<void> {\n if (isFirstTimeSetup) {\n await fs.writeFile(tsConfigPath, '{}' + os.EOL)\n }\n\n const desiredCompilerOptions = getDesiredCompilerOptions(ts)\n const {\n options: tsOptions,\n raw: rawConfig,\n } = await getTypeScriptConfiguration(ts, tsConfigPath, true)\n\n const userTsConfigContent = await fs.readFile(tsConfigPath, {\n encoding: 'utf8',\n })\n const userTsConfig = CommentJson.parse(userTsConfigContent)\n if (userTsConfig.compilerOptions == null && !('extends' in rawConfig)) {\n userTsConfig.compilerOptions = {}\n isFirstTimeSetup = true\n }\n\n const suggestedActions: string[] = []\n const requiredActions: string[] = []\n for (const optionKey of Object.keys(desiredCompilerOptions)) {\n const check = desiredCompilerOptions[optionKey]\n if ('suggested' in check) {\n if (!(optionKey in tsOptions)) {\n userTsConfig.compilerOptions[optionKey] = check.suggested\n suggestedActions.push(\n chalk.cyan(optionKey) + ' was set to ' + chalk.bold(check.suggested)\n )\n }\n } else if ('value' in check) {\n const ev = tsOptions[optionKey]\n if (\n !('parsedValues' in check\n ? check.parsedValues?.includes(ev)\n : 'parsedValue' in check\n ? check.parsedValue === ev\n : check.value === ev)\n ) {\n userTsConfig.compilerOptions[optionKey] = check.value\n requiredActions.push(\n chalk.cyan(optionKey) +\n ' was set to ' +\n chalk.bold(check.value) +\n ` (${check.reason})`\n )\n }\n } else {\n // eslint-disable-next-line @typescript-eslint/no-unused-vars\n const _: never = check\n }\n }\n\n if (!('include' in rawConfig)) {\n userTsConfig.include = ['next-env.d.ts', '**/*.ts', '**/*.tsx']\n suggestedActions.push(\n chalk.cyan('include') +\n ' was set to ' +\n chalk.bold(`['next-env.d.ts', '**/*.ts', '**/*.tsx']`)\n )\n }\n\n if (!('exclude' in rawConfig)) {\n userTsConfig.exclude = ['node_modules']\n suggestedActions.push(\n chalk.cyan('exclude') + ' was set to ' + chalk.bold(`['node_modules']`)\n )\n }\n\n if (suggestedActions.length < 1 && requiredActions.length < 1) {\n return\n }\n\n await fs.writeFile(\n tsConfigPath,\n CommentJson.stringify(userTsConfig, null, 2) + os.EOL\n )\n\n if (isFirstTimeSetup) {\n console.log(\n chalk.green(\n `We detected TypeScript in your project and created a ${chalk.bold(\n 'tsconfig.json'\n )} file for you.`\n ) + '\\n'\n )\n return\n }\n\n console.log(\n chalk.green(\n `We detected TypeScript in your project and reconfigured your ${chalk.bold(\n 'tsconfig.json'\n )} file for you. Strict-mode is set to ${chalk.bold('false')} by default.`\n ) + '\\n'\n )\n if (suggestedActions.length) {\n console.log(\n `The following suggested values were added to your ${chalk.cyan(\n 'tsconfig.json'\n )}. These values ${chalk.bold(\n 'can be changed'\n )} to fit your project's needs:\\n`\n )\n\n suggestedActions.forEach((action) => console.log(`\\t- ${action}`))\n\n console.log('')\n }\n\n if (requiredActions.length) {\n console.log(\n `The following ${chalk.bold(\n 'mandatory changes'\n )} were made to your ${chalk.cyan('tsconfig.json')}:\\n`\n )\n\n requiredActions.forEach((action) => console.log(`\\t- ${action}`))\n\n console.log('')\n }\n}\n"]} |