scratch-desktop/scripts/afterSign.js

const {notarize} = require('electron-notarize');

const notarizeMacBuild = async function (context) {
    // keep this in sync with appId in the electron-builder config
    const appId = 'edu.mit.scratch.scratch-desktop';

    if (!process.env.AC_USERNAME) {
        throw new Error(
            'Notarizing the macOS build requires an Apple ID.\n' +
            'Please set the environment variable AC_USERNAME.\n' +
            'Make sure your keychain has an item for "Application Loader: your@apple.id"'
        );
    }

    const appleId = process.env.AC_USERNAME;
    const appleIdKeychainItem = `Application Loader: ${appleId}`;

    console.log(`Notarizing with Apple ID "${appleId}" and keychain item "${appleIdKeychainItem}"`);

    const {appOutDir} = context;
    const productFilename = context.packager.appInfo.productFilename;
    await notarize({
        appBundleId: appId,
        appPath: `${appOutDir}/${productFilename}.app`,
        appleId,
        appleIdPassword: `@keychain:${appleIdKeychainItem}`
    });
};

const afterSign = async function (context) {
    const {electronPlatformName} = context;

    switch (electronPlatformName) {
    case 'mas': // macOS build for Mac App Store
        break;
    case 'darwin': // macOS build NOT for Mac App Store
        await notarizeMacBuild(context);
        break;
    }
};

module.exports = afterSign;