create build scrupt, make adjustments to use examples from package json

packages/create-waku-app/build.js

@@ -0,0 +1,42 @@
+#!/usr/bin/env node
+const path = require("path");
+const fs = require("fs-extra");
+
+const packageJson = require("./package.json");
+const examplesFolder = path.resolve("./examples");
+
+async function run() {
+    fs.ensureDirSync(examplesFolder);
+
+    const supportedExamples = Object.entries(packageJson.wakuExamples);
+
+    console.log("Started copying supported Waku examples.");
+
+    const copyPromises = supportedExamples.map(([name, relativePath]) => {
+        const resolvedPath = path.resolve(__dirname, relativePath);
+        const destinationPath = path.resolve(examplesFolder, name);
+        
+        return fs.copy(resolvedPath, destinationPath, { filter: nodeModulesFiler }).catch((error) => {
+            console.error(`Failed to copy example ${name} to ${destinationPath} with ${error.message}`);
+            throw Error(error.message);
+        });
+    });
+
+    await Promise.all(copyPromises)
+        .then(() => {
+            console.log("Finished copying examples.");
+        })
+        .catch((error) => {
+            console.error("Failed to copy examples due to " + error.message);
+        });
+}
+
+function nodeModulesFiler(src) {
+    if (src.includes("node_modules")) {
+        return false;
+    }
+
+    return true;
+}
+
+run();

packages/create-waku-app/createApp.js

@@ -0,0 +1,76 @@
+const fs = require("fs-extra");
+const path = require("path");
+const { Command } = require('commander');
+const validateProjectName = require('validate-npm-package-name');
+
+const supportedExamplesDir = path.resolve("./examples");
+
+const init = (name, description, version, supportedExamples) => {
+    let appName;
+    const program = new Command()
+        .name(name)
+        .description(description)
+        .version(version, "-v, --version", "output the version number")
+        .arguments("<project-directory>", "Project directory to initialize Waku app")
+        .action(_appName => {
+            appName = _appName;
+        })
+        .option(
+            "-t, --template <path-to-template>", 
+            "specify a template for the created project"
+        )
+        .allowUnknownOption()
+        .parse();
+
+    const options = program.opts();
+    const template = options.template || "web-chat";
+
+    if (!supportedExamples[template]) {
+        const supportedExamplesMessage = Object.keys(supportedExamples).reduce((acc, v) => {
+            acc += `\t${v}\n`;
+            return acc;
+        }, "");
+
+        console.error(`Unknown template: ${template}`);
+        console.error(`We support only following templates:\n${supportedExamplesMessage}`)
+        process.exit(1);
+    }
+
+    createApp(appName, template);
+};
+
+function createApp(name, template) {
+    const appRoot = path.resolve(name);
+    const appName = path.basename(appRoot);
+
+    const templateDir = path.resolve(supportedExamplesDir, template);
+
+    terminateIfAppExists(appName);
+    terminateIfProjectNameInvalid(appName);
+
+    console.log(`Initializing ${appName} from ${template} template.`);
+
+    fs.copySync(templateDir, appRoot);
+    // initNpmOrYarn(appRoot);
+}
+
+function terminateIfProjectNameInvalid(name) {
+    const validationResult = validateProjectName(name);
+
+    if (!validationResult.validForNewPackages) {
+        console.error(`Cannot create a project named ${name} because of npm naming restrictions:\n`);
+        [...(validationResult.errors || []), ...(validationResult.warnings || [])]
+            .forEach(error => console.error(`  * ${error}`));
+        console.error("\nPlease choose a different project name.");
+        process.exit(1);
+    }
+}
+
+function terminateIfAppExists(appRoot) {
+    if (fs.existsSync(appRoot)) {
+        console.error(`Cannot create a project because it already exists by the name: ${appRoot}`);
+        process.exit(1);
+    }
+}
+
+module.exports = { init };

packages/create-waku-app/createWakuApp.js

@@ -1,28 +0,0 @@
-const { Command } = require('commander');
-
-const packageJson = require('./package.json');
-
-let appName;
-
-const createApp = () => {
-    const program = new Command()
-        .name(packageJson.name)
-        .description(packageJson.description)
-        .version(packageJson.version)
-        .arguments("<project-directory>", "Project directory to initialize Waku app")
-        .action(name => {
-            appName = name;
-        })
-        .option(
-            "-t, --template <path-to-template>", 
-            "specify a template for the created project"
-        )
-        .allowUnknownOption()
-        .parse();
-
-    const options = program.opts();
-
-    console.log(`Initializing ${appName} from template ${options.template || "default"}`);
-};
-
-module.exports = { createApp };

packages/create-waku-app/index.js

@@ -1,4 +1,19 @@
 #!/usr/bin/env node
-const { createApp } = require("./createWakuApp");
+const packageJson = require("./package.json");
+const semver = require("semver");
 
-createApp();
+const currentNodeVersion = process.versions.node;
+const supportedNodeVersion = packageJson.engines.node;
+
+if (!semver.satisfies(currentNodeVersion, supportedNodeVersion)) {
+  console.error(
+    `You are running Node ${currentNodeVersion}.\n` +
+    `@waku/create-app works only with ${packageJson.engines.node}.\n` +
+    `Please update your version of Node.`
+  );
+  process.exit(1);
+}
+
+const { init } = require("./createApp");
+
+init(packageJson.name, packageJson.description, packageJson.version, packageJson.wakuExamples);

packages/create-waku-app/package.json

@@ -1,22 +1,55 @@
 {
-    "name": "create-waku-app",
-    "version": "0.1.0",
+    "name": "create-dementor-app",
+    "version": "0.1.13",
     "description": "Helper package to bootstrap Waku app ",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/waku-org/js-waku-examples.git",
+        "directory": "packages/create-app"
+    },
+    "engines": {
+        "node": ">=16"
+    },
+    "bugs": {
+        "url": "https://github.com/waku-org/js-waku-examples/issues"
+    },
+    "files": [
+        "index.js",
+        "createApp.js",
+        "examples"
+    ],
     "main": "index.js",
+    "bin": {
+        "create-waku-app": "./index.js"
+    },
     "scripts": {
-      "test": "echo \"Error: no test specified\" && exit 1"
+        "build": "node ./build.js",
+        "prepublishOnly": "npm run build"
     },
     "keywords": [
-      "waku",
-      "decentralised",
-      "communication",
-      "web3",
-      "ethereum",
-      "dapps"
+        "waku",
+        "decentralised",
+        "communication",
+        "web3",
+        "ethereum",
+        "dapps"
     ],
-    "license": "MIT OR Apache-2.0",
+    "license": "MIT",
+    "wakuExamples": {
+        "eth-pm": "../../eth-pm",
+        "light-js": "../../light-js",
+        "relay-angular-chat": "../../relay-angular-chat",
+        "relay-js": "../../relay-js",
+        "relay-reactjs-chat": "../../relay-reactjs-chat",
+        "rln-js": "../../rln-js",
+        "store-js": "../../store-js",
+        "store-reactjs-chat": "../../store-reactjs-chat",
+        "web-chat": "../../web-chat"
+    },
     "dependencies": {
-      "commander": "^9.4.1"
+        "commander": "^9.4.1",
+        "fs-extra": "^11.1.0",
+        "semver": "^7.3.8",
+        "validate-npm-package-name": "^5.0.0"
     }
-  }
-  
+}