Lamassu update script changes (#126)

* lamassu-migrate-config script added + lamassu-default.json

* lamassu update script changes

* lamassu-update unit test added

lib/migrate-options.js

@@ -0,0 +1,51 @@
+const _ = require('lodash/fp')
+const fs = require('fs')
+const makeDir = require('make-dir')
+
+const load = require('./options-loader')
+
+module.exports = {run, mapKeyValuesDeep}
+
+function mapKeyValuesDeep (cb, obj, key) {
+  if (_.isArray(obj)) {
+    return _.mapValues((val, key) => mapKeyValuesDeep(cb, val, key), obj)
+  } else if (_.isObject(obj)) {
+    return _.pickBy((val, key) => mapKeyValuesDeep(cb, val, key), obj)
+  } else {
+    return cb(obj, key)
+  }
+}
+
+async function run () {
+  // load defaults
+  const defaultOpts = require('../lamassu-default')
+
+  // load current opts
+  const options = load()
+  const currentOpts = options.opts
+
+  // check if there are new options to add
+  const result = _.mergeAll([defaultOpts, currentOpts])
+  const shouldMigrate = !_.isEqual(result, currentOpts)
+
+  // write the resulting lamassu.json
+  if (shouldMigrate) {
+    const newOpts = _.pick(_.difference(_.keys(result), _.keys(currentOpts)), result)
+    console.log('Adding options', newOpts)
+
+    // store new lamassu.json file
+    fs.writeFileSync(options.path, JSON.stringify(result, null, '  '))
+  }
+
+  // get all the new options
+  // that ends with "Dir" suffix
+  mapKeyValuesDeep((v, k) => {
+    if (_.endsWith('Dir', k)) {
+      const path = _.attempt(() => makeDir.sync(v))
+
+      if (_.isError(path)) {
+        console.error(`Error while creating folder ${v}`, path)
+      }
+    }
+  }, result)
+}