(build) Fix the publish stage

Author: arturcic

azure-pipelines.yml

@@ -1,3 +1,5 @@
+variables: { DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 'true', DOTNET_CLI_TELEMETRY_OPTOUT: 'true' }
+
 stages:
 - stage: Build
   jobs:

build/utils/paths.cake

@@ -46,7 +46,7 @@ public class BuildPaths
 
         var vsixSuffix = parameters.IsStableRelease() ? "" : "preview-";
         var vsixOutputFilePath = buildArtifactDir.CombineWithFilePath("gittools.gitversion-" + vsixSuffix + version.VsixVersion + ".vsix");
-        if (vsixOutputFilePath == null) {
+        if (context.FileExists(vsixOutputFilePath)) {
             vsixOutputFilePath = context.GetFiles(buildArtifactDir + "/*.vsix").First();
         }