[NuGet.VisualStudioExtension] IVsPackageInstallerServices.GetInstalledPackages returns zero in 2015

[deepakaravindr]

@kzu,

Here's a repro xunit test for VS2015: http://cloud.cazzulino.com/NuGetTests.7z

May be related to #13.

This is a blocker for a feature in Xamarin that retargets nuget packages when migrating a project from "Classic" to the new "Unified" API (from MonoTouch target framework to Xamarin.iOS).

[deepakaravindr]

This is fixed

[kzu]

Awesome!

On Thu, Apr 9, 2015, 7:13 PM Deepak Aravindakshan [email protected]
wrote:

This is fixed

Reply to this email directly or view it on GitHub
#313 (comment).

[cbries]

Are you sure it is fixed?

Right now I have this problem. I am still analyzing the issue, but
IEnumerable GetInstalledPackages();
and
IEnumerable GetInstalledPackages(Project project)
return zero.

But "nuget restore" prints: "All packages are listed in packages.config are installed."

Btw. tested on Vs17.9.5, Vs17-preview and Vs19-preview

Supplement:
As I see in the sources the returned list will be zero in case the methods are called when the solution is not available...
public IEnumerable<IVsPackageMetadata> GetInstalledPackages() {
var packages = new HashSet<IVsPackageMetadata>(new VsPackageMetadataComparer());
return NuGetUIThreadHelper.JoinableTaskFactory.Run(async delegate {
// Calls may occur in the template wizard before the solution is actually created,
// in that case return no projects
if (_solutionManager != null
&& !string.IsNullOrEmpty(_solutionManager.SolutionDirectory))
[[snip]]

The call of GetInstalledPackages() is done in a IProjectEvents event, named "AfterProjectFileOpened", which in turn "optionally requires" a solution file (in my context it is already their) but probably is not loaded before the "AfterProjectFileOpened"-event is fired. Strange...

Supplement 2:
My first thought in the previous notes looks correct.
Within the event handler dte2.Events.SolutionEvents.Opened += SolutionEvents_Opened; the list of packages is correctly returned; but a way to late in my current scenario...