feat(cli): added verbose option

The log level is now set to exclude debug and verbose output by default,
but it can be turned back on by starting room-assistant with the
--verbose option.

bin/room-assistant.js

@@ -1,2 +1,41 @@
 #!/usr/bin/env node
+const commandLineUsage = require('command-line-usage');
+const commandLineArgs = require('command-line-args');
+
+const optionDefinitions = [
+  {
+    name: 'help',
+    description: 'Display this usage guide.',
+    alias: 'h',
+    type: Boolean
+  },
+  {
+    name: 'verbose',
+    description: 'Turn on debugging output.',
+    alias: 'v',
+    type: Boolean
+  }
+];
+const usage = commandLineUsage([
+  {
+    header: 'room-assistant',
+    content:
+      'A companion client for Home Assistant to handle presence detection and sensors in multiple rooms.'
+  },
+  {
+    header: 'Options',
+    optionList: optionDefinitions
+  }
+]);
+const options = commandLineArgs(optionDefinitions);
+
+if (options.help) {
+  console.log(usage);
+  return;
+}
+
+process.env.NODE_LOG_LEVEL = options.verbose
+  ? 'verbose'
+  : process.env.NODE_LOG_LEVEL || 'production';
+
 require('../dist/main');

package.json

@@ -40,6 +40,8 @@
     "@nestjs/platform-express": "^6.10.14",
     "@nestjs/schedule": "^0.1.1",
     "async-mqtt": "^2.4.2",
+    "command-line-args": "^5.1.1",
+    "command-line-usage": "^6.1.0",
     "config": "^3.2.4",
     "democracy": "^3.1.3",
     "js-yaml": "^3.13.1",

src/main.ts

@@ -3,7 +3,12 @@ import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
 
 async function bootstrap(): Promise<void> {
-  const app = await NestFactory.create(AppModule);
+  const app = await NestFactory.create(AppModule, {
+    logger:
+      process.env.NODE_LOG_LEVEL === 'production'
+        ? ['error', 'warn', 'log']
+        : undefined
+  });
   app.enableShutdownHooks();
   await app.listenAsync(6415);
 }