Changing <Bind> item metadata does not rerun appropriate parts of the build

[Digifais]

Android framework version

net8.0-android

Affected platform version

.NET 8.0.303

Description

When changing item metadata from true to false or vice versa, dotnet build doesn't pick the change up, I need to perform a dotnet clean first before dotnet build works again.

msbuild.binlog.zip

Steps to Reproduce

1. Create a new Android binding library
2. Add an AAR to the project and select AndroidLibrary as build action (should add a blank <Bind></Bind>)
3. Set <Bind> to false.
4. Build the project through the .NET CLI
5. Set <Bind> to true
6. Build the project through the .NET CLI again and see that it produces the same result of not binding the AAR

Did you find any workaround?

Perform dotnet clean first after changing from true to false or vice versa.

Relevant log output

No response

[jonathanpeppers]

We were looking at MSBuild's logic, and putting blank <Bind></Bind> really does clear it. It would invalidate the <ItemDefinitionGroup> here:

https://github.com/dotnet/android/blob/99ba8135fc47358702a5918757651d53d7b6fabd/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.AvailableItems.targets#L48-L51

[Digifais]

@jonathanpeppers So this is really a non-issue and might just be a VS4Mac bug that it adds a blank <Bind></Bind>?

[jonathanpeppers]

@Digifais yes, it looks like it might be that way.

If you see it not taking the change <Bind>true</Bind> vs <Bind>false</Bind> we could look into that.

[Digifais]

@jonathanpeppers As mentioned in the Discord, I indeed need to perform a dotnet clean first when changing the value.

[jonathanpeppers]

I renamed the title, thanks.

[Digifais]

Updated the issue description.