Add update notifications for cli, addresses #51

Author: yamalight

package.json

@@ -15,6 +15,7 @@
     "package": "pkg --targets node8.3.0-linux-x64,node8.3.0-win-x64,node8.3.0-macos-x64 -o exoframe index.js"
   },
   "dependencies": {
+    "boxen": "^1.2.1",
     "chalk": "^2.1.0",
     "cli-table": "^0.3.1",
     "got": "^7.1.0",
@@ -26,6 +27,7 @@
     "opn": "^5.1.0",
     "ora": "^1.3.0",
     "tar-fs": "^1.15.3",
+    "update-notifier": "^2.2.0",
     "yargs": "^8.0.2"
   },
   "devDependencies": {

src/index.js

@@ -1,9 +1,15 @@
 // npm packages
 const yargs = require('yargs');
 
+// our packages
+const checkUpdate = require('./util/checkUpdate');
+
 // version
 const pkg = require('../package.json');
 
+// check for updates on start
+checkUpdate(pkg);
+
 // our packages
 const login = require('./commands/login');
 const deploy = require('./commands/deploy');

src/util/checkUpdate.js

@@ -0,0 +1,36 @@
+// npm packages
+const chalk = require('chalk');
+const boxen = require('boxen');
+const updateNotifier = require('update-notifier');
+
+// boxen options
+const boxenOpts = {
+  padding: 1,
+  margin: 1,
+  align: 'center',
+  borderColor: 'yellow',
+  borderStyle: 'round',
+};
+// packaged script path
+const pkgPath = '/snapshot/exoframe-cli/src/util';
+
+// check function
+module.exports = pkg => {
+  // Checks for available update and returns an instance
+  const notifier = updateNotifier({
+    pkg,
+    updateCheckInterval: 1000,
+  });
+  // show message if update is available
+  if (notifier.update) {
+    const {update} = notifier;
+    const isPackaged = __dirname === pkgPath;
+    const upNpmMsg = `Run ${chalk.cyan('npm i -g exoframe')} to update`;
+    const upPkgMsg = `Download from ${chalk.cyan('https://github.com/exoframejs/exoframe/releases')}`;
+    const upmsg = isPackaged ? upPkgMsg : upNpmMsg;
+    const message = `Update available ${chalk.dim(update.current)} ${chalk.reset(' → ')} ${chalk.green(
+      update.latest
+    )}\n${upmsg}`;
+    console.log(`\n${boxen(message, boxenOpts)}`);
+  }
+};