Function parseConfig

test/fixtures/snapshot/typescript.js:41643–41688

* This *just* extracts options/include/exclude/files out of a config file. * It does *not* resolve the included files.

(json, sourceFile, host, basePath, configFileName, resolutionStack, errors, extendedConfigCache)

     * It does *not* resolve the included files.
     */
    function parseConfig(json, sourceFile, host, basePath, configFileName, resolutionStack, errors, extendedConfigCache) {
        var _a;
        basePath = ts.normalizeSlashes(basePath);
        var resolvedPath = ts.getNormalizedAbsolutePath(configFileName || "", basePath);
        if (resolutionStack.indexOf(resolvedPath) >= 0) {
            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Circularity_detected_while_resolving_configuration_Colon_0, __spreadArray(__spreadArray([], resolutionStack, true), [resolvedPath], false).join(" -> ")));
            return { raw: json || convertToObject(sourceFile, errors) };
        }
        var ownConfig = json ?
            parseOwnConfigOfJson(json, host, basePath, configFileName, errors) :
            parseOwnConfigOfJsonSourceFile(sourceFile, host, basePath, configFileName, errors);
        if ((_a = ownConfig.options) === null || _a === void 0 ? void 0 : _a.paths) {
            // If we end up needing to resolve relative paths from 'paths' relative to
            // the config file location, we'll need to know where that config file was.
            // Since 'paths' can be inherited from an extended config in another directory,
            // we wouldn't know which directory to use unless we store it here.
            ownConfig.options.pathsBasePath = basePath;
        }
        if (ownConfig.extendedConfigPath) {
            // copy the resolution stack so it is never reused between branches in potential diamond-problem scenarios.
            resolutionStack = resolutionStack.concat([resolvedPath]);
            var extendedConfig = getExtendedConfig(sourceFile, ownConfig.extendedConfigPath, host, resolutionStack, errors, extendedConfigCache);
            if (extendedConfig && isSuccessfulParsedTsconfig(extendedConfig)) {
                var baseRaw_1 = extendedConfig.raw;
                var raw_1 = ownConfig.raw;
                var relativeDifference_1;
                var setPropertyInRawIfNotUndefined = function (propertyName) {
                    if (!raw_1[propertyName] && baseRaw_1[propertyName]) {
                        raw_1[propertyName] = ts.map(baseRaw_1[propertyName], function (path) { return ts.isRootedDiskPath(path) ? path : ts.combinePaths(relativeDifference_1 || (relativeDifference_1 = ts.convertToRelativePath(ts.getDirectoryPath(ownConfig.extendedConfigPath), basePath, ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames))), path); });
                    }
                };
                setPropertyInRawIfNotUndefined("include");
                setPropertyInRawIfNotUndefined("exclude");
                setPropertyInRawIfNotUndefined("files");
                if (raw_1.compileOnSave === undefined) {
                    raw_1.compileOnSave = baseRaw_1.compileOnSave;
                }
                ownConfig.options = ts.assign({}, extendedConfig.options, ownConfig.options);
                ownConfig.watchOptions = ownConfig.watchOptions && extendedConfig.watchOptions ?
                    ts.assign({}, extendedConfig.watchOptions, ownConfig.watchOptions) :
                    ownConfig.watchOptions || extendedConfig.watchOptions;
                // TODO extend type typeAcquisition
            }
        }
        return ownConfig;
    }
    function parseOwnConfigOfJson(json, host, basePath, configFileName, errors) {
        if (ts.hasProperty(json, "excludes")) {
            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));