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The updated reference assemblies in Mono 5.0 don't depend on Microsoft.Build.Engine.dll anymore which contained the Microsoft.Build.BuildEngine namespace so this using isn't found anymore.

It was unnecessary anyway so remove it.

…reference assemblies

The updated reference assemblies in Mono 5.0 don't depend on Microsoft.Build.Engine.dll anymore which contained the Microsoft.Build.BuildEngine namespace so this using isn't found anymore.

It was unnecessary anyway so remove it.
@jonpryor jonpryor merged commit 634ba1d into dotnet:master Apr 21, 2017
@akoeplinger akoeplinger deleted the remove-using branch April 21, 2017 14:17
akoeplinger added a commit to akoeplinger/xamarin-android that referenced this pull request Apr 21, 2017
…e using (dotnet#567)

The updated reference assemblies in Mono 5.0 don't depend on
`Microsoft.Build.Engine.dll` anymore, and that assembly contained the
`Microsoft.Build.BuildEngine` namespace.

Consequently, `ProjectBuilder.cs` doesn't build when using the
updated Mono 5.0 reference assemblies.

Remove the `using Microsoft.Build.BuildEngine` declaration, as it
is unnecessary.

(cherry-picked from 634ba1d)
jonpryor pushed a commit that referenced this pull request Feb 19, 2020
Context: dotnet/java-interop@8f30933

Changes: dotnet/java-interop@3226a4b...8f30933

  * dotnet/java-interop@8f30933: [generator] Mark some Obsolete fields as errors (#568)
  * dotnet/java-interop@47201c4: [generator] Change protected members in final class to private (#569)
  * dotnet/java-interop@c5815fb: [generator] Be smarter about when members with same names need "new" (#567)
  * dotnet/java-interop@bfc0273: [generator] Ensure property setter parameter name is "value" (#566)

This Java.Interop bump includes two changes which "break" API:

  * Certain fields are changed from `[Obsolete]` to
    `[Obsolete(error:true)]`, turning *use* of the field within C#
    code into a CS0619 error.

  * The C# compiler has long warned about the presence of `protected`
    members within `sealed` types, as they cannot be used.  However,
    they were still emitted, resulting in CS0628 warnings when
    compiling `Mono.Android.dll`.

We consider changing `[Obsolete]` to `[Obsolete(error:true)]` to be
acceptable because this is being done to `const` fields, so this
won't break ABI, as there are no IL references to `const` fields, and
because (1) there are "replacement" members which can be used, and
(2) these fields have been obsolete for *years*.

The "problem" here is that `Microsoft.DotNet.ApiCompat.exe`, which
the `<CheckApiCompatibility/>` task uses from
`src/Mono.Android/Mono.Android.targets`, sees every such change as
an API break.  This in and of itself is plausibly sensible, but the
error message *itself* is bananas, e.g.:

	namespace Android.AccessibilityServices {
	  public abstract partial class AccessibilityService : Android.App.Service {
	    [Register ("GESTURE_SWIPE_DOWN", ApiSince = 16)]
	    [Obsolete ("This constant will be removed in the future version. Use Android.AccessibilityServices.AccessibilityGesture enum directly instead of this field.", error: true)]
	    public const Android.AccessibilityServices.AccessibilityGesture GestureSwipeDown = (Android.AccessibilityServices.AccessibilityGesture) 2;
	  }
	}

results in:

	CannotRemoveAttribute : Attribute 'System.ObsoleteAttribute' exists on 'Android.AccessibilityServices.AccessibilityGesture Android.AccessibilityServices.AccessibilityService.GestureSwipeDown' in the contract but not the implementation.

The message implies that `[Obsolete]` was removed, which isn't
strictly true!  `[Obsolete]` is still there!  It's just that the
constructor parameters have changed.

This results in a ginormous change to
`tests/api-compatibility/acceptable-breakages-vReference.txt`.

The "`protected` members within `sealed` types" fix for CS0628 also
resulted in errors from the Tests > API Compatibility job, which runs
via `external/xamarin-android-api-compatibility`.

Given that commit 07e7477 was intended to *replace* the
Tests > API Compatibility job, *remove* the 
`external/xamarin-android-api-compatibility` submodule reference.
We will no longer be using that submodule for API compat checks.

Co-authored-by: Jonathan Pobst <monkey@jpobst.com>
jonpryor pushed a commit that referenced this pull request Feb 19, 2020
Context: dotnet/java-interop@8f30933

Changes: dotnet/java-interop@423e27f...fefe0ca

  * dotnet/java-interop@fefe0ca: [generator] Mark some Obsolete fields as errors (#568)
  * dotnet/java-interop@d969a0c: [generator] Change protected members in final class to private (#569)
  * dotnet/java-interop@3c4accf: [generator] Be smarter about when members with same names need "new" (#567)
  * dotnet/java-interop@41b87d0: [generator] Ensure property setter parameter name is "value" (#566)

This Java.Interop bump includes two changes which "break" API:

  * Certain fields are changed from `[Obsolete]` to
    `[Obsolete(error:true)]`, turning *use* of the field within C#
    code into a CS0619 error.

  * The C# compiler has long warned about the presence of `protected`
    members within `sealed` types, as they cannot be used.  However,
    they were still emitted, resulting in CS0628 warnings when
    compiling `Mono.Android.dll`.

We consider changing `[Obsolete]` to `[Obsolete(error:true)]` to be
acceptable because this is being done to `const` fields, so this
won't break ABI, as there are no IL references to `const` fields, and
because (1) there are "replacement" members which can be used, and
(2) these fields have been obsolete for *years*.

The "problem" here is that `Microsoft.DotNet.ApiCompat.exe`, which
the `<CheckApiCompatibility/>` task uses from
`src/Mono.Android/Mono.Android.targets`, sees every such change as
an API break.  This in and of itself is plausibly sensible, but the
error message *itself* is bananas, e.g.:

	namespace Android.AccessibilityServices {
	  public abstract partial class AccessibilityService : Android.App.Service {
	    [Register ("GESTURE_SWIPE_DOWN", ApiSince = 16)]
	    [Obsolete ("This constant will be removed in the future version. Use Android.AccessibilityServices.AccessibilityGesture enum directly instead of this field.", error: true)]
	    public const Android.AccessibilityServices.AccessibilityGesture GestureSwipeDown = (Android.AccessibilityServices.AccessibilityGesture) 2;
	  }
	}

results in:

	CannotRemoveAttribute : Attribute 'System.ObsoleteAttribute' exists on 'Android.AccessibilityServices.AccessibilityGesture Android.AccessibilityServices.AccessibilityService.GestureSwipeDown' in the contract but not the implementation.

The message implies that `[Obsolete]` was removed, which isn't
strictly true!  `[Obsolete]` is still there!  It's just that the
constructor parameters have changed.

This results in a ginormous change to
`tests/api-compatibility/acceptable-breakages-vReference.txt`.

The "`protected` members within `sealed` types" fix for CS0628 also
resulted in errors from the Tests > API Compatibility job, which runs
via `external/xamarin-android-api-compatibility`.

Given that commit 07e7477 was intended to *replace* the
Tests > API Compatibility job, *remove* the
`external/xamarin-android-api-compatibility` submodule reference.
We will no longer be using that submodule for API compat checks.

Co-authored-by: Jonathan Pobst <monkey@jpobst.com>
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3 participants