function generateDeclarationFile()

in build/monaco/api.js [301:434]
133 lines of code
19 McCabe index (conditional complexity)

function generateDeclarationFile(recipe, sourceFileGetter) {
    const endl = /\r\n/.test(recipe) ? '\r\n' : '\n';
    let lines = recipe.split(endl);
    let result = [];
    let usageCounter = 0;
    let usageImports = [];
    let usage = [];
    let failed = false;
    usage.push(`var a;`);
    usage.push(`var b;`);
    const generateUsageImport = (moduleId) => {
        let importName = 'm' + (++usageCounter);
        usageImports.push(`import * as ${importName} from './${moduleId.replace(/\.d\.ts$/, '')}';`);
        return importName;
    };
    let enums = [];
    let version = null;
    lines.forEach(line => {
        if (failed) {
            return;
        }
        let m0 = line.match(/^\/\/dtsv=(\d+)$/);
        if (m0) {
            version = m0[1];
        }
        let m1 = line.match(/^\s*#include\(([^;)]*)(;[^)]*)?\)\:(.*)$/);
        if (m1) {
            let moduleId = m1[1];
            const sourceFile = sourceFileGetter(moduleId);
            if (!sourceFile) {
                logErr(`While handling ${line}`);
                logErr(`Cannot find ${moduleId}`);
                failed = true;
                return;
            }
            const importName = generateUsageImport(moduleId);
            let replacer = createReplacer(m1[2]);
            let typeNames = m1[3].split(/,/);
            typeNames.forEach((typeName) => {
                typeName = typeName.trim();
                if (typeName.length === 0) {
                    return;
                }
                let declaration = getTopLevelDeclaration(sourceFile, typeName);
                if (!declaration) {
                    logErr(`While handling ${line}`);
                    logErr(`Cannot find ${typeName}`);
                    failed = true;
                    return;
                }
                result.push(replacer(getMassagedTopLevelDeclarationText(sourceFile, declaration, importName, usage, enums)));
            });
            return;
        }
        let m2 = line.match(/^\s*#includeAll\(([^;)]*)(;[^)]*)?\)\:(.*)$/);
        if (m2) {
            let moduleId = m2[1];
            const sourceFile = sourceFileGetter(moduleId);
            if (!sourceFile) {
                logErr(`While handling ${line}`);
                logErr(`Cannot find ${moduleId}`);
                failed = true;
                return;
            }
            const importName = generateUsageImport(moduleId);
            let replacer = createReplacer(m2[2]);
            let typeNames = m2[3].split(/,/);
            let typesToExcludeMap = {};
            let typesToExcludeArr = [];
            typeNames.forEach((typeName) => {
                typeName = typeName.trim();
                if (typeName.length === 0) {
                    return;
                }
                typesToExcludeMap[typeName] = true;
                typesToExcludeArr.push(typeName);
            });
            getAllTopLevelDeclarations(sourceFile).forEach((declaration) => {
                if (isDeclaration(declaration) && declaration.name) {
                    if (typesToExcludeMap[declaration.name.text]) {
                        return;
                    }
                }
                else {
                    // node is ts.VariableStatement
                    let nodeText = getNodeText(sourceFile, declaration);
                    for (let i = 0; i < typesToExcludeArr.length; i++) {
                        if (nodeText.indexOf(typesToExcludeArr[i]) >= 0) {
                            return;
                        }
                    }
                }
                result.push(replacer(getMassagedTopLevelDeclarationText(sourceFile, declaration, importName, usage, enums)));
            });
            return;
        }
        result.push(line);
    });
    if (failed) {
        return null;
    }
    if (version !== dtsv) {
        if (!version) {
            logErr(`gulp watch restart required. 'monaco.d.ts.recipe' is written before versioning was introduced.`);
        }
        else {
            logErr(`gulp watch restart required. 'monaco.d.ts.recipe' v${version} does not match runtime v${dtsv}.`);
        }
        return null;
    }
    let resultTxt = result.join(endl);
    resultTxt = resultTxt.replace(/\bURI\b/g, 'Uri');
    resultTxt = resultTxt.replace(/\bEvent</g, 'IEvent<');
    resultTxt = resultTxt.split(/\r\n|\n|\r/).join(endl);
    resultTxt = format(resultTxt, endl);
    resultTxt = resultTxt.split(/\r\n|\n|\r/).join(endl);
    let resultEnums = [
        '/*---------------------------------------------------------------------------------------------',
        ' *  Copyright (c) Microsoft Corporation. All rights reserved.',
        ' *  Licensed under the MIT License. See License.txt in the project root for license information.',
        ' *--------------------------------------------------------------------------------------------*/',
        '',
        '// THIS IS A GENERATED FILE. DO NOT EDIT DIRECTLY.',
        ''
    ].concat(enums).join(endl);
    resultEnums = resultEnums.split(/\r\n|\n|\r/).join(endl);
    resultEnums = format(resultEnums, endl);
    resultEnums = resultEnums.split(/\r\n|\n|\r/).join(endl);
    return {
        result: resultTxt,
        usageContent: `${usageImports.join('\n')}\n\n${usage.join('\n')}`,
        enums: resultEnums
    };
}