budibase/packages/server/utilities/builder/savePackage.js

const { appPackageFolder } = require("../createAppPackage");
const { writeJSON } = require("fs-extra");
const buildApp = require("./buildApp");

module.exports = async (config, appname, pkg) => {
    const appPath = appPackageFolder(config, appname);
    await writeJSON(
        `${appPath}/appDefinition.json`, 
        pkg.appDefinition,
        {spaces:2});

    await writeJSON(
        `${appPath}/access_levels.json`,
        pkg.accessLevels,
        {spaces:2});

    await writeJSON(
        `${appPath}/pages.json`,
        pkg.pages,
        {spaces:2});

    await buildApp(
        config, appname, 
        pkg.pages, pkg.appDefinition);
}