moved command execution to own .js file

libs/commands.js

@@ -0,0 +1,26 @@
+const logger = require('./logger.js');
+const { spawn } = require('child_process');
+
+function execute(cmd, args) {
+    return new Promise(function (resolve, reject) {
+        var spawned = spawn(cmd, args);
+        spawned.stdout.on('data', function (data) {
+            logger.debug(data);
+        });
+        spawned.stderr.on('data', function (data) {
+            logger.error(data);
+        });
+        spawned.on('close', function (code) {
+            logger.debug('command \'' + cmd + '\' with args \'' + args + '\' finished with exit code ' + code);
+            resolve();
+        });
+        spawned.on('error', function (err) {
+            logger.error('command \'' + cmd + '\' with args \'' + args + '\' encountered an error >>> ' + err);
+            reject(err);
+        });
+    });
+}
+
+module.exports = {
+    execute
+}

libs/modep.js

@@ -3,9 +3,9 @@ const util = require('./util.js');
 const constants = require('./constants.js');
 const logger = require('./logger.js');
 const cache = require('./cache.js');
+const commands = require('./commands.js');
 const path = require('path');
 const fs = require('fs');
-const { spawn } = require('child_process');
 const ttl2jsonld = require('@frogcat/ttl2jsonld').parse;
 
 function reset() {