Merge pull request #3579 from thelounge/xpaw/watch-packages

Automatically load new packages (fs.watch package.json)

src/command-line/index.js

@@ -2,6 +2,7 @@
 
 const log = require("../log");
 const fs = require("fs");
+const fsextra = require("fs-extra");
 const path = require("path");
 const colors = require("chalk");
 const program = require("commander");
@@ -36,6 +37,9 @@ try {
 	// fs.statSync will throw if config.js does not exist (e.g. first run)
 }
 
+// Create packages/package.json
+createPackagesFolder();
+
 // Merge config key-values passed as CLI options into the main config
 Helper.mergeConfig(Helper.config, program.config);
 
@@ -62,6 +66,31 @@ if (program.rawArgs.length < 3) {
 	program.help();
 }
 
+function createPackagesFolder() {
+	const packagesPath = Helper.getPackagesPath();
+	const packagesConfig = path.join(packagesPath, "package.json");
+
+	// Create node_modules folder, otherwise yarn will start walking upwards to find one
+	fsextra.ensureDirSync(path.join(packagesPath, "node_modules"));
+
+	// Create package.json with private set to true, if it doesn't exist already
+	if (!fs.existsSync(packagesConfig)) {
+		fs.writeFileSync(
+			packagesConfig,
+			JSON.stringify(
+				{
+					private: true,
+					description:
+						"Packages for The Lounge. All packages in node_modules directory will be automatically loaded.",
+					dependencies: {},
+				},
+				null,
+				"\t"
+			)
+		);
+	}
+}
+
 function verifyFileOwner() {
 	if (!process.getuid) {
 		return;

src/command-line/install.js

@@ -12,8 +12,6 @@ program
 	.on("--help", Utils.extraHelp)
 	.action(function(packageName) {
 		const fs = require("fs");
-		const fsextra = require("fs-extra");
-		const path = require("path");
 		const packageJson = require("package-json");
 
 		if (!fs.existsSync(Helper.getConfigPath())) {
@@ -44,28 +42,6 @@ program
 
 				log.info(`Installing ${colors.green(json.name + " v" + json.version)}...`);
 
-				const packagesPath = Helper.getPackagesPath();
-				const packagesConfig = path.join(packagesPath, "package.json");
-
-				// Create node_modules folder, otherwise yarn will start walking upwards to find one
-				fsextra.ensureDirSync(path.join(packagesPath, "node_modules"));
-
-				// Create package.json with private set to true, if it doesn't exist already
-				if (!fs.existsSync(packagesConfig)) {
-					fs.writeFileSync(
-						packagesConfig,
-						JSON.stringify(
-							{
-								private: true,
-								description:
-									"Packages for The Lounge. All packages in node_modules directory will be automatically loaded.",
-							},
-							null,
-							"\t"
-						)
-					);
-				}
-
 				return Utils.executeYarnCommand("add", "--exact", `${json.name}@${json.version}`)
 					.then(() => {
 						log.info(

src/plugins/packages/index.js

@@ -1,5 +1,6 @@
 "use strict";
 
+const _ = require("lodash");
 const log = require("../../log");
 const colors = require("chalk");
 const path = require("path");
@@ -19,6 +20,8 @@ const cache = {
 	outdated: undefined,
 };
 
+let experimentalWarningPrinted = false;
+
 module.exports = {
 	getFiles,
 	getStylesheets,
@@ -66,25 +69,25 @@ function getPackage(name) {
 	return packageMap.get(name);
 }
 
-function loadPackages() {
+function getEnabledPackages(packageJson) {
-	const packageJson = path.join(Helper.getPackagesPath(), "package.json");
-	let packages;
-	let anyPlugins = false;
-
 	try {
-		packages = Object.keys(require(packageJson).dependencies);
+		const json = JSON.parse(fs.readFileSync(packageJson, "utf-8"));
+		return Object.keys(json.dependencies);
 	} catch (e) {
-		packages = [];
+		log.error(`Failed to read packages/package.json: ${colors.red(e)}`);
 	}
 
-	packages.forEach((packageName) => {
+	return [];
+}
+
+function loadPackage(packageName) {
 	let packageInfo;
 	let packageFile;
 
 	try {
 		const packagePath = Helper.getPackageModulePath(packageName);
 
-			packageInfo = require(path.join(packagePath, "package.json"));
+		packageInfo = JSON.parse(fs.readFileSync(path.join(packagePath, "package.json"), "utf-8"));
 
 		if (!packageInfo.thelounge) {
 			throw "'thelounge' is not present in package.json";
@@ -110,8 +113,6 @@ function loadPackages() {
 		if (packageInfo.files) {
 			packageInfo.files.forEach((file) => addFile(packageName, file));
 		}
-		} else {
-			anyPlugins = true;
 	}
 
 	if (packageFile.onServerStart) {
@@ -119,15 +120,50 @@ function loadPackages() {
 	}
 
 	log.info(`Package ${colors.bold(packageName)} ${colors.green("v" + version)} loaded`);
-	});
 
-	if (anyPlugins) {
+	if (packageInfo.type !== "theme" && !experimentalWarningPrinted) {
+		experimentalWarningPrinted = true;
+
 		log.info(
-			"There are packages using the experimental plugin API. Be aware that this API is not yet stable and may change in future The Lounge releases."
+			"There are packages using the experimental plugin API. " +
+				"Be aware that this API is not yet stable and may change in future The Lounge releases."
 		);
 	}
 }
 
+function loadPackages() {
+	const packageJson = path.join(Helper.getPackagesPath(), "package.json");
+	const packages = getEnabledPackages(packageJson);
+
+	packages.forEach(loadPackage);
+
+	watchPackages(packageJson);
+}
+
+function watchPackages(packageJson) {
+	fs.watch(
+		packageJson,
+		{
+			persistent: false,
+		},
+		_.debounce(
+			() => {
+				const updated = getEnabledPackages(packageJson);
+
+				for (const packageName of updated) {
+					if (packageMap.has(packageName)) {
+						continue;
+					}
+
+					loadPackage(packageName);
+				}
+			},
+			1000,
+			{maxWait: 10000}
+		)
+	);
+}
+
 async function outdated(cacheTimeout = TIME_TO_LIVE) {
 	if (cache.outdated !== undefined) {
 		return cache.outdated;