next/dist/esm/lib/verify-typescript-setup.js

The React Framework

import { bold, cyan, red, yellow } from './picocolors';
import path from 'path';
import { hasNecessaryDependencies } from './has-necessary-dependencies';
import semver from 'next/dist/compiled/semver';
import { CompileError } from './compile-error';
import * as log from '../build/output/log';
import { getTypeScriptIntent } from './typescript/getTypeScriptIntent';
import { writeAppTypeDeclarations } from './typescript/writeAppTypeDeclarations';
import { writeConfigurationDefaults } from './typescript/writeConfigurationDefaults';
import { installDependencies } from './install-dependencies';
import { isCI } from '../server/ci-info';
import { missingDepsError } from './typescript/missingDependencyError';
const requiredPackages = [
    {
        file: 'typescript/lib/typescript.js',
        pkg: 'typescript',
        exportsRestrict: true
    },
    {
        file: '@types/react/index.d.ts',
        pkg: '@types/react',
        exportsRestrict: true
    },
    {
        file: '@types/node/index.d.ts',
        pkg: '@types/node',
        exportsRestrict: true
    }
];
export async function verifyTypeScriptSetup({ dir, distDir, cacheDir, intentDirs, tsconfigPath, typeCheckPreflight, disableStaticImages, hasAppDir, hasPagesDir }) {
    const resolvedTsConfigPath = path.join(dir, tsconfigPath);
    try {
        var _deps_missing;
        // Check if the project uses TypeScript:
        const intent = await getTypeScriptIntent(dir, intentDirs, tsconfigPath);
        if (!intent) {
            return {
                version: null
            };
        }
        // Ensure TypeScript and necessary `@types/*` are installed:
        let deps = await hasNecessaryDependencies(dir, requiredPackages);
        if (((_deps_missing = deps.missing) == null ? void 0 : _deps_missing.length) > 0) {
            if (isCI) {
                // we don't attempt auto install in CI to avoid side-effects
                // and instead log the error for installing needed packages
                missingDepsError(dir, deps.missing);
            }
            console.log(bold(yellow(`It looks like you're trying to use TypeScript but do not have the required package(s) installed.`)) + '\n' + 'Installing dependencies' + '\n\n' + bold('If you are not trying to use TypeScript, please remove the ' + cyan('tsconfig.json') + ' file from your package root (and any TypeScript files in your app and pages directories).') + '\n');
            await installDependencies(dir, deps.missing, true).catch((err)=>{
                if (err && typeof err === 'object' && 'command' in err) {
                    console.error(`Failed to install required TypeScript dependencies, please install them manually to continue:\n` + err.command + '\n');
                }
                throw err;
            });
            deps = await hasNecessaryDependencies(dir, requiredPackages);
        }
        // Load TypeScript after we're sure it exists:
        const tsPath = deps.resolved.get('typescript');
        const ts = await Promise.resolve(require(tsPath));
        if (semver.lt(ts.version, '4.5.2')) {
            log.warn(`Minimum recommended TypeScript version is v4.5.2, older versions can potentially be incompatible with Next.js. Detected: ${ts.version}`);
        }
        // Reconfigure (or create) the user's `tsconfig.json` for them:
        await writeConfigurationDefaults(ts, resolvedTsConfigPath, intent.firstTimeSetup, hasAppDir, distDir, hasPagesDir);
        // Write out the necessary `next-env.d.ts` file to correctly register
        // Next.js' types:
        await writeAppTypeDeclarations({
            baseDir: dir,
            imageImportsEnabled: !disableStaticImages,
            hasPagesDir,
            hasAppDir
        });
        let result;
        if (typeCheckPreflight) {
            const { runTypeCheck } = require('./typescript/runTypeCheck');
            // Verify the project passes type-checking before we go to webpack phase:
            result = await runTypeCheck(ts, dir, distDir, resolvedTsConfigPath, cacheDir, hasAppDir);
        }
        return {
            result,
            version: ts.version
        };
    } catch (err) {
        // These are special errors that should not show a stack trace:
        if (err instanceof CompileError) {
            console.error(red('Failed to compile.\n'));
            console.error(err.message);
            process.exit(1);
        }
        /**
     * verifyTypeScriptSetup can be either invoked directly in the main thread (during next dev / next lint)
     * or run in a worker (during next build). In the latter case, we need to print the error message, as the
     * parent process will only receive an `Jest worker encountered 1 child process exceptions, exceeding retry limit`.
     */ // we are in a worker, print the error message and exit the process
        if (process.env.IS_NEXT_WORKER) {
            if (err instanceof Error) {
                console.error(err.message);
            } else {
                console.error(err);
            }
            process.exit(1);
        }
        // we are in the main thread, throw the error and it will be handled by the caller
        throw err;
    }
}

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