Removing app.js before writing to it to avoid partial writes

Fixes #128

Author: andreasohlund

src/ServicePulse.Host/Commands/AbstractCommand.cs

@@ -12,6 +12,12 @@ public static void UpdateConfig(string directoryPath, string serviceControlUrl)
         {
             var appJsPath = Path.Combine(directoryPath, "config.js");
             var appJsCode = File.ReadAllText(appJsPath);
+
+            if (File.Exists(appJsPath))
+            {
+                File.Delete(appJsPath);
+            }
+
             File.WriteAllText(appJsPath,
                 Regex.Replace(appJsCode, @"(service_control_url: ')([\w:/]*)(')", "$1" + serviceControlUrl + "$3"));
         }

src/ServicePulse.Host/Commands/UpdateVersionCommand.cs

@@ -35,8 +35,15 @@ static void UpdateVersion(string directoryPath)
         {
             var appJsPath = Path.Combine(directoryPath, "js/app.js");
             var appJsCode = File.ReadAllText(appJsPath);
-            File.WriteAllText(appJsPath,
-                Regex.Replace(appJsCode, @"(constant\('version', ')([\w:/.-]*)(')", "${1}" + GetFileVersion() + "$3"));
+
+            if (File.Exists(appJsPath))
+            {
+                File.Delete(appJsPath);
+            }
+
+            var updatedContent = Regex.Replace(appJsCode, @"(constant\('version', ')([\w:/.-]*)(')", "${1}" + GetFileVersion() + "$3");
+
+            File.WriteAllText(appJsPath, updatedContent);
         }
 
         static string GetFileVersion()