[GB] check installed deps & log user friendly error, fix #2455

core/tools/dataStitcher.js

@@ -18,6 +18,7 @@ Stitcher.prototype.ago = function(ts) {
 }
 
 Stitcher.prototype.verifyExchange = function() {
+  require(dirs.gekko + 'exchange/dependencyCheck');
   const exchangeChecker = require(dirs.gekko + 'exchange/exchangeChecker');
   const slug = config.watch.exchange.toLowerCase();
   let exchange;

exchange/dependencyCheck.js

@@ -0,0 +1,23 @@
+const deps = require('./package.json').dependencies;
+
+const missing = [];
+
+Object.keys(deps).forEach(dep => {
+  try {
+    require(dep);
+  } catch(e) {
+    if(e.code === 'MODULE_NOT_FOUND') {
+      missing.push(dep);
+    }
+  }
+});
+
+if(missing.length) {
+  console.error(
+    '\nThe following Gekko Broker dependencies are not installed: [',
+    missing.join(', '),
+    '].\n\nYou need to install them first, read here how:',
+    'https://gekko.wizb.it/docs/installation/installing_gekko.html#Installing-Gekko-39-s-dependencies\n'
+  );
+  process.exit(1);
+}

plugins/trader/trader.js

@@ -7,6 +7,8 @@ const moment = require('moment');
 const log = require(dirs.core + 'log');
 const Broker = require(dirs.gekko + '/exchange/gekkoBroker');
 
+require(dirs.gekko + '/exchange/dependencyCheck');
+
 const Trader = function(next) {
 
   _.bindAll(this);