refactor db connection string

lib/options.js

@@ -0,0 +1,29 @@
+'use strict'
+
+var fs = require('fs')
+var path = require('path')
+var os = require('os')
+
+var options
+var configPath
+
+try {
+  configPath = '/etc/lamassu.json'
+  options = JSON.parse(fs.readFileSync(configPath))
+} catch (err) {
+  try {
+    configPath = path.resolve(os.homedir(), '.lamassu', 'lamassu.json')
+    options = JSON.parse(fs.readFileSync(configPath))
+  } catch (err2) {
+    console.log('Missing configuration file -- exiting.')
+    process.exit(1)
+  }
+}
+
+var psqlUrl = options.postgres
+if (!psqlUrl) {
+  console.log('Missing postgres entry in configuration file: %s', configPath)
+  process.exit(2)
+}
+
+module.exports = options