neu-forge/src/lib/frontendlib.js

A Tool for developing neutralinojs applications

// Simple Functions For Apply Hot Reloading

const fs = require('fs');
const recursive = require('recursive-readdir');
const config = require('./config.js');
const constants = require('./constants.js');

const HOT_REL_PATCH_REGEX = constants.misc.hotReloadPatchRegex;
let originalClientLib = null;

async function makeClientLibUrl(port) {
	let configObj = config.get();
	let resourcesPath = configObj.cli.resourcesPath.replace(/^\//, '');
	let files = await recursive(resourcesPath);
	let clientLib = files
		.find((file) => /neutralino\.js$/.test(file))
		.replace(/\\/g, '/'); //Fix path on windows;

	let url = `http://localhost:${port}`;

	if(clientLib) {
		clientLib = '/' + clientLib;
		if(configObj.documentRoot) {
			clientLib = clientLib.replace(configObj.documentRoot, '/');
		}
		url += clientLib;
	}
	return url;
}

function patchHTMLFile(clientLib) {
	let configObj = config.get();
	let patchFile = configObj.cli.frontendLibrary.patchFile.replace(/^\//, '');
	let html = fs.readFileSync(patchFile, 'utf8');
	let matches = HOT_REL_PATCH_REGEX.exec(html);
	if(matches) {
		html = html.replace(HOT_REL_PATCH_REGEX, `$1${clientLib}$3`);
		fs.writeFileSync(patchFile, html);
		return matches[2];
	}
	return null;
}

module.exports.bootstrap = async (port) => {
	let clientLibUrl = await makeClientLibUrl(port);
	originalClientLib = patchHTMLFile(clientLibUrl);
	console.log(`WARNING: Hot reload patch was applied successfully. ` + `Please avoid sending keyboard interrupts.`);
	console.log('INFO: You are working with your frontend library\'s development environment. ' + 'Hot reload and other tooling will work alongside with Neutralinojs API.');
}

module.exports.cleanup = () => {
	if(originalClientLib) {
		patchHTMLFile(originalClientLib);
		console.log('INFO: Hot reload patch was reverted.');
	}
}