fix: Add cli argument parsing

This also adds the -a/--adapter option to the cli.

Author: relekang

package.json

@@ -15,23 +15,24 @@
     "node": ">=6.0.0"
   },
   "scripts": {
-    "start": "micro dist/index.js",
+    "start": "node dist/index.js",
     "build": "./node_modules/.bin/async-to-gen src --out-dir dist",
     "prepublish": "npm run build",
-    "dev": "NODE_ENV=development nodemon --config package.json src/index.js",
+    "dev": "NODE_ENV=development nodemon --config package.json --exec async-node src/index.js",
     "test": "jest"
   },
   "author": "Max Stoiber <[email protected]> (http://mxstbr.com/)",
   "license": "MIT",
   "repository": "https://github.com/mxstbr/micro-analytics",
   "dependencies": {
+    "args": "^2.3.0",
     "flat-file-db": "^1.0.0",
     "micro": "6.1.0",
     "micro-analytics-adapter-flat-file-db": "^1.0.3",
     "promise": "^7.1.1",
     "shelljs": "^0.7.6",
-    "update-notifier": "^1.0.3",
     "sse": "0.0.6",
+    "update-notifier": "^1.0.3",
     "zen-observable": "^0.4.0"
   },
   "devDependencies": {
@@ -41,6 +42,7 @@
     "babel-polyfill": "^6.20.0",
     "babel-preset-node6": "^11.0.0",
     "jest": "^19.0.2",
+    "nodemon": "^1.11.0",
     "request-promise": "^4.1.1"
   },
   "execMap": {

src/index.js

@@ -1,11 +1,28 @@
 const micro = require('micro')
 const SSE = require('sse')
+const args = require('args');
 
 const handler = require('./handler')
 const sseHandler = require('./sse')
 
+const flags = args
+  .option(['p', 'port'], 'Port to listen on', process.env.PORT || 3000, Number)
+  .option(['H', 'host'], 'Host to listen on', '0.0.0.0')
+  .option(['a', 'adapter'], 'Database adapter used', process.env.DB_ADAPTER || 'flat-file-db')
+  .parse(process.argv, { name: 'micro-analytics' })
+
 const server = micro(handler)
 const sse = new SSE(server)
 sse.on('connection', sseHandler)
 
-server.listen(3000)
+server.listen(flags.port, flags.host, (error) => {
+  if (error) {
+    console.error(error)
+    process.exit(1)
+  }
+
+  console.log(
+    'micro-analytics listening on ' + flags.host + ':' + flags.port + ' with adapter ' +
+    flags.adapter
+  )
+})