skip npm install when modules dir exists

for #10

Author: robertmuehsig

ElectronNET.CLI/Commands/StartElectronCommand.cs

@@ -55,8 +55,19 @@ public Task<bool> ExecuteAsync()
 
                 DeployEmbeddedElectronFiles.Do(tempPath);
 
-                Console.WriteLine("Start npm install...");
-                ProcessHelper.CmdExecute("npm install", tempPath);
+                var checkForNodeModulesDirPath = Path.Combine(tempPath, "node_modules");
+
+                if (Directory.Exists(checkForNodeModulesDirPath) == false)
+                {
+                    Console.WriteLine("node_modules missing in: " + checkForNodeModulesDirPath);
+
+                    Console.WriteLine("Start npm install...");
+                    ProcessHelper.CmdExecute("npm install", tempPath);
+                }
+                else
+                {
+                    Console.WriteLine("Skip npm install, because node_modules directory exists in: " + checkForNodeModulesDirPath);
+                }
 
                 string path = Path.Combine(tempPath, "node_modules", ".bin");