next/dist/esm/lib/typescript/runTypeCheck.js

The React Framework

import path from 'path';
import { DiagnosticCategory, getFormattedDiagnostic } from './diagnosticFormatter';
import { getTypeScriptConfiguration } from './getTypeScriptConfiguration';
import { getRequiredConfiguration } from './writeConfigurationDefaults';
import { CompileError } from '../compile-error';
import { warn } from '../../build/output/log';
export async function runTypeCheck(ts, baseDir, distDir, tsConfigPath, cacheDir, isAppDirEnabled) {
    const effectiveConfiguration = await getTypeScriptConfiguration(ts, tsConfigPath);
    if (effectiveConfiguration.fileNames.length < 1) {
        return {
            hasWarnings: false,
            inputFilesCount: 0,
            totalFilesCount: 0,
            incremental: false
        };
    }
    const requiredConfig = getRequiredConfiguration(ts);
    const options = {
        ...requiredConfig,
        ...effectiveConfiguration.options,
        declarationMap: false,
        emitDeclarationOnly: false,
        noEmit: true
    };
    let program;
    let incremental = false;
    if ((options.incremental || options.composite) && cacheDir) {
        if (options.composite) {
            warn('TypeScript project references are not fully supported. Attempting to build in incremental mode.');
        }
        incremental = true;
        program = ts.createIncrementalProgram({
            rootNames: effectiveConfiguration.fileNames,
            options: {
                ...options,
                composite: false,
                incremental: true,
                tsBuildInfoFile: path.join(cacheDir, '.tsbuildinfo')
            }
        });
    } else {
        program = ts.createProgram(effectiveConfiguration.fileNames, options);
    }
    const result = program.emit();
    const ignoreRegex = [
        // matches **/__(tests|mocks)__/**
        /[\\/]__(?:tests|mocks)__[\\/]/,
        // matches **/*.(spec|test).*
        /(?<=[\\/.])(?:spec|test)\.[^\\/]+$/
    ];
    const regexIgnoredFile = new RegExp(ignoreRegex.map((r)=>r.source).join('|'));
    const allDiagnostics = ts.getPreEmitDiagnostics(program).concat(result.diagnostics).filter((d)=>!(d.file && regexIgnoredFile.test(d.file.fileName)));
    const firstError = allDiagnostics.find((d)=>d.category === DiagnosticCategory.Error && Boolean(d.file)) ?? allDiagnostics.find((d)=>d.category === DiagnosticCategory.Error);
    // In test mode, we want to check all diagnostics, not just the first one.
    if (process.env.__NEXT_TEST_MODE) {
        if (firstError) {
            const allErrors = allDiagnostics.filter((d)=>d.category === DiagnosticCategory.Error).map((d)=>'[Test Mode] ' + getFormattedDiagnostic(ts, baseDir, distDir, d, isAppDirEnabled));
            console.error('\n\n===== TS errors =====\n\n' + allErrors.join('\n\n') + '\n\n===== TS errors =====\n\n');
            // Make sure all stdout is flushed before we exit.
            await new Promise((resolve)=>setTimeout(resolve, 100));
        }
    }
    if (firstError) {
        throw Object.defineProperty(new CompileError(getFormattedDiagnostic(ts, baseDir, distDir, firstError, isAppDirEnabled)), "__NEXT_ERROR_CODE", {
            value: "E394",
            enumerable: false,
            configurable: true
        });
    }
    const warnings = allDiagnostics.filter((d)=>d.category === DiagnosticCategory.Warning).map((d)=>getFormattedDiagnostic(ts, baseDir, distDir, d, isAppDirEnabled));
    return {
        hasWarnings: true,
        warnings,
        inputFilesCount: effectiveConfiguration.fileNames.length,
        totalFilesCount: program.getSourceFiles().length,
        incremental
    };
}

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