function validateNodeVersion()

in src/nodejsWorker.ts [14:52]

• 35 lines of code
• 8 McCabe index (conditional complexity)

function validateNodeVersion(version: string) {
    let errorMessage: string | undefined;
    let warningMessage: string | undefined;
    try {
        const versionSplit = version.split('.');
        const major = versionSplit[0];
        // process.version returns invalid output
        if (versionSplit.length != 3) {
            errorMessage = "Could not parse Node.js version: '" + version + "'";
            // Unsupported version note: Documentation about Node's stable versions here: https://github.com/nodejs/Release#release-plan and an explanation here: https://medium.com/swlh/understanding-how-node-releases-work-in-2018-6fd356816db4
        } else if (process.env.AZURE_FUNCTIONS_ENVIRONMENT == 'Development' && devOnlyVersions.indexOf(major) >= 0) {
            warningMessage =
                'Node.js version used (' +
                version +
                ') is not officially supported. You may use it during local development, but must use an officially supported version on Azure:' +
                ' https://aka.ms/functions-node-versions';
        } else if (supportedVersions.indexOf(major) < 0) {
            errorMessage =
                'Incompatible Node.js version' +
                ' (' +
                version +
                ').' +
                ' Refer to our documentation to see the Node.js versions supported by each version of Azure Functions: https://aka.ms/functions-node-versions';
        }
        // Unknown error
    } catch (err) {
        const unknownError = 'Error in validating Node.js version. ';
        console.error(errorPrefix + unknownError + err);
        throw unknownError + err;
    }
    // Throw error for known version errors
    if (errorMessage) {
        console.error(errorPrefix + errorMessage);
        throw new Error(errorMessage);
    }
    if (warningMessage) {
        console.warn(warnPrefix + warningMessage);
    }
}