xamarin-macios/msbuild/Xamarin.Shared/Xamarin.Shared.ObjCBinding.targets

<!--
***********************************************************************************************
Xamarin.Shared.ObjCBinding.targets

WARNING:  DO NOT MODIFY this file unless you are knowledgeable about MSBuild and have
  created a backup copy.  Incorrect changes to this file will make it
  impossible to load or build your projects from the command-line or the IDE.

This file imports the version- and platform-specific targets for the project importing
this file. This file also defines targets to produce an error if the specified targets
file does not exist, but the project is built anyway (command-line or IDE build).

Copyright (C) 2020 Microsoft. All rights reserved.
***********************************************************************************************
-->

<!-- This file is shared between Xamarin.iOS and Xamarin.Mac, but only included for binding projects -->

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

	<!-- Add our own pre-build steps -->
	<PropertyGroup Condition="'$(UsingAppleNETSdk)' != 'true'">
		<BuildDependsOn>
			BuildOnlySettings;
			_CreateGeneratedSourcesDir;
			_CreateEmbeddedResources;
			$(BuildDependsOn)
		</BuildDependsOn>
	</PropertyGroup>

	<!-- Add our own Clean steps -->
	<PropertyGroup Condition="'$(UsingAppleNETSdk)' != 'true'">
		<CleanDependsOn>
			_CleanGeneratedSources;
			$(CleanDependsOn)
		</CleanDependsOn>
	</PropertyGroup>

	<!-- Create a directory to contain the generated sources -->
	<Target Name="_CreateGeneratedSourcesDir">
		<MakeDir Directories="$(GeneratedSourcesDir)" />
	</Target>

	<!-- Clean the generated sources -->
	<Target Name="_CleanGeneratedSources">
		<RemoveDir Directories="$(GeneratedSourcesDir)" Condition="Exists ('$(GeneratedSourcesDir)')" />
	</Target>

	<Target Name="_CollectGeneratedSources"
		DependsOnTargets="_GenerateBindings;_CompressNativeFrameworkResources"
		Condition="'$(DesignTimeBuild)' != 'true'"
	>

		<ReadLinesFromFile File="$(_GeneratedSourcesFileList)" >
			<Output TaskParameter="Lines" ItemName="Compile" />
		</ReadLinesFromFile>

		<ItemGroup>
			<Compile Include="@(ObjcBindingCoreSource)" />

			<EmbeddedResource Include="@(ObjcBindingNativeLibrary)">
				<Type>Non-Resx</Type>
				<WithCulture>false</WithCulture>
			</EmbeddedResource>
		</ItemGroup>
	</Target>

	<!--

		We can't just use @(_NativeFramework) as the input to the
		_CompressNativeFrameworkResources task, because _NativeFramework is a
		list of directories, and MSBuild doesn't do dependency checks
		correctly when inputs are directories. So instead get all the files
		from every framework, and use that as the inputs.

		Additionally we add two metadatas on each file:

		* The path to the framework the file belongs to
		* The path to the zip file where the compressed directory will be stored

		Then when we compress the frameworks in
		_CompressNativeFrameworkResources, we use the zip file metadata as the
		output, which means MSBuild will batch the call to
		_CompressNativeFrameworkResources, and call
		_CompressNativeFrameworkResources once for each zip file, passing in
		only the inputs that correspond to that zip file. This effectively
		means that _CompressNativeFrameworkResources will be called once for
		each framework we want to compress, which is exactly what we want.

	-->
	<Target Name="_CollectNativeFrameworkResources" Returns="@(_NativeFrameworkResource)" DependsOnTargets="_PrepareNativeReferences">
		<ItemGroup>
			<_NativeFrameworkResource Include="%(_NativeFramework.Identity)\**\*.*" Condition="'%(_NativeFramework.Identity)' != ''">
				<FrameworkPath>%(_NativeFramework.Identity)</FrameworkPath>
				<ZipFile>$(IntermediateOutputPath)%(_NativeFramework.Filename)%(_NativeFramework.Extension)</ZipFile>
			</_NativeFrameworkResource>
			<_NativeFrameworkResource Include="%(ObjCBindingNativeFramework.Identity)\**\*.*" Condition="'%(ObjCBindingNativeFramework.Identity)' != ''">
				<FrameworkPath>%(ObjCBindingNativeFramework.Identity)</FrameworkPath>
				<ZipFile>$(IntermediateOutputPath)%(ObjCBindingNativeFramework.Filename)%(ObjCBindingNativeFramework.Extension)</ZipFile>
			</_NativeFrameworkResource>
		</ItemGroup>
	</Target>

	<Target Name="_CreateEmbeddedResources" DependsOnTargets="_CollectBundleResources">
		<CreateEmbeddedResources 
			SessionId="$(BuildSessionId)" 
			BundleResources="@(_BundleResourceWithLogicalName)" 
			Prefix="$(_EmbeddedResourcePrefix)">
			
			<Output ItemName="EmbeddedResource" TaskParameter="EmbeddedResources" />
		</CreateEmbeddedResources>
	</Target>

	<Target Name="_CompressNativeFrameworkResources" Inputs="@(_NativeFrameworkResource)" Outputs="%(_NativeFrameworkResource.ZipFile)" DependsOnTargets="_CollectNativeFrameworkResources">
		<Delete SessionId="$(BuildSessionId)" Condition="'$(IsMacEnabled)' == 'true'" Files="%(_NativeFrameworkResource.ZipFile)" />

		<Zip
			SessionId="$(BuildSessionId)"
			Condition="'$(IsMacEnabled)' == 'true'"
			ToolExe="$(ZipExe)"
			ToolPath="$(ZipPath)"
			Recursive="true"
			Symlinks="true"
			Sources="%(_NativeFrameworkResource.FrameworkPath)"
			OutputFile="%(_NativeFrameworkResource.ZipFile)"
			WorkingDirectory="%(_NativeFrameworkResource.FrameworkPath)" >
		</Zip>

		<ItemGroup>
			<EmbeddedResource Include="%(_NativeFrameworkResource.ZipFile)">
				<Type>Non-Resx</Type>
				<WithCulture>false</WithCulture>
			</EmbeddedResource>
		</ItemGroup>
	</Target>

	<Target Name="_PrepareNativeReferences" Condition="'$(DesignTimeBuild)' != 'true'">
		<PrepareNativeReferences
			Condition="'$(IsMacEnabled)' == 'true'"
			SessionId="$(BuildSessionId)"
			IntermediateOutputPath="$(IntermediateOutputPath)"
			NativeReferences="@(NativeReference)"
		>
			<Output ItemName="EmbeddedResource" TaskParameter="EmbeddedResources" Condition="'$(NoBindingEmbedding)' != 'true'"/>
			<Output ItemName="_NativeFramework" TaskParameter="NativeFrameworks" Condition="'$(NoBindingEmbedding)' != 'true'"/>
			<Output ItemName="Compile" TaskParameter="LinkWithAttributes" />
		</PrepareNativeReferences>
	</Target>
</Project>