export async function parsePackageJson()

in src/parsers/parsePackageJson.ts [16:44]

• 26 lines of code
• 10 McCabe index (conditional complexity)

export async function parsePackageJson(dir: string): Promise<PackageJson> {
    try {
        const filePath = path.join(dir, 'package.json');
        if (!(await pathExists(filePath))) {
            throw new AzFuncSystemError('file does not exist');
        }

        const data: unknown = await readJson(filePath);
        if (typeof data !== 'object' || data === null || Array.isArray(data)) {
            throw new AzFuncSystemError('file content is not an object');
        }

        const stringFields = ['main', 'type'];
        for (const field of stringFields) {
            if (field in data && typeof data[field] !== 'string') {
                // ignore fields with an unexpected type
                delete data[field];
            }
        }
        return data;
    } catch (err) {
        const error: Error = ensureErrorType(err);
        if (error.name === 'SyntaxError') {
            const message = `file content is not valid JSON: ${error.message}`;
            trySetErrorMessage(error, message);
        }
        throw error;
    }
}