NuGet.targets

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
	<PropertyGroup>
		<SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">$(MSBuildProjectDirectory)/../</SolutionDir>

		<!-- Enable the restore command to run before builds -->
		<RestorePackages Condition="  '$(RestorePackages)' == '' ">true</RestorePackages>

		<!-- Property that enables building a package from a project -->
		<BuildPackage Condition=" '$(BuildPackage)' == '' ">false</BuildPackage>

		<!-- Determines if package restore consent is required to restore packages -->
		<RequireRestoreConsent Condition=" '$(RequireRestoreConsent)' != 'false' ">false</RequireRestoreConsent>

		<!-- Download NuGet.exe if it does not already exist -->
		<DownloadNuGetExe Condition=" '$(DownloadNuGetExe)' == '' ">true</DownloadNuGetExe>
	</PropertyGroup>

	<ItemGroup Condition=" '$(PackageSources)' == '' ">
		<!-- Package sources used to restore packages. By default, registered sources under %APPDATA%\NuGet\NuGet.Config will be used -->
		<!-- The official NuGet package source (https://nuget.org/api/v2/) will be excluded if package sources are specified and it does not appear in the list -->
		<PackageSource Include="http://nuget.org/api/v2/" />
		<PackageSource Include="http://build.palaso.org/guestAuth/app/nuget/v1/FeedService.svc/" />
	</ItemGroup>

	<PropertyGroup>
		<NuGetToolsPath>$(MSBuildThisFileDirectory)</NuGetToolsPath>
		<PackagesConfig Condition="'$(OS)'=='Windows_NT'">$(ProjectDir)packages.config</PackagesConfig>
		<PackagesConfig Condition="'$(OS)'!='Windows_NT'">$(ProjectDir)/packages.config</PackagesConfig>
	</PropertyGroup>

	<PropertyGroup>
		<!-- NuGet command -->
		<NuGetExePath Condition=" '$(NuGetExePath)' == '' ">$(NuGetToolsPath)/NuGet.exe</NuGetExePath>
		<PackageSources Condition=" $(PackageSources) == '' ">@(PackageSource)</PackageSources>

		<NuGetCommand Condition=" '$(OS)' == 'Windows_NT'">"$(NuGetExePath)"</NuGetCommand>
		<NuGetCommand Condition=" '$(OS)' != 'Windows_NT' ">mono --runtime=v4.0.30319 $(NuGetExePath)</NuGetCommand>

		<PackageOutputDir Condition="$(PackageOutputDir) == ''">$(TargetDir).Trim('\\', '/')</PackageOutputDir>

		<RequireConsentSwitch Condition=" $(RequireRestoreConsent) == 'true' ">-RequireConsent</RequireConsentSwitch>
		<NonInteractiveSwitch Condition=" '$(VisualStudioVersion)' != '' AND '$(OS)' == 'Windows_NT' ">-NonInteractive</NonInteractiveSwitch>

		<!-- Commands -->
		<RestoreCommand>$(NuGetCommand) install "$(PackagesConfig)" -source "$(PackageSources)" $(NonInteractiveSwitch) $(RequireConsentSwitch) -solutionDirectory "$(SolutionDir)."</RestoreCommand>
		<BuildCommand>$(NuGetCommand) pack "$(ProjectPath)" -Properties Configuration=$(Configuration) $(NonInteractiveSwitch) -OutputDirectory "$(PackageOutputDir)" -symbols</BuildCommand>

		<!-- We need to ensure packages are restored prior to assembly resolve -->
		<BuildDependsOn Condition="$(RestorePackages) == 'true'">
			RestorePackages;
			$(BuildDependsOn);
		</BuildDependsOn>

		<!-- Make the build depend on restore packages -->
		<BuildDependsOn Condition="$(BuildPackage) == 'true'">
			$(BuildDependsOn);
			BuildPackage;
		</BuildDependsOn>
	</PropertyGroup>

	<Target Name="CheckPrerequisites">
		<!-- Raise an error if we're unable to locate nuget.exe  -->
		<Error Condition="'$(DownloadNuGetExe)' != 'true' AND !Exists('$(NuGetExePath)')" Text="Unable to locate '$(NuGetExePath)'" />
		<!--
		Take advantage of MsBuild's build dependency tracking to make sure that we only ever download nuget.exe once.
		This effectively acts as a lock that makes sure that the download operation will only happen once and all
		parallel builds will have to wait for it to complete.
		-->
		<MsBuild Targets="_DownloadNuGet" Projects="$(MSBuildThisFileFullPath)" Properties="Configuration=NOT_IMPORTANT;DownloadNuGetExe=$(DownloadNuGetExe)" />
	</Target>

	<Target Name="_DownloadNuGet" Condition=" '$(DownloadNuGetExe)' == 'true' AND !Exists('$(NuGetExePath)')">
		<DownloadNuGet OutputFilename="$(NuGetExePath)" Condition="'$(OS)' == 'Windows_NT'" />
		<Exec Command="wget https://nuget.org/NuGet.exe" WorkingDirectory="$(NuGetToolsPath)"
			Condition="'$(OS)' != 'Windows_NT'" />
	</Target>

	<Target Name="RestorePackages" DependsOnTargets="CheckPrerequisites">
		<Message Text="PackagesConfig=$(PackagesConfig)"/>
		<Exec Command="$(RestoreCommand)"
			  Condition="'$(OS)' != 'Windows_NT' And Exists('$(PackagesConfig)')" />

		<Exec Command="$(RestoreCommand)"
			  LogStandardErrorAsError="true"
			  Condition="'$(OS)' == 'Windows_NT' And Exists('$(PackagesConfig)')" />
	</Target>

	<Target Name="BuildPackage" DependsOnTargets="CheckPrerequisites">
		<Exec Command="$(BuildCommand)"
			  Condition=" '$(OS)' != 'Windows_NT' " />

		<Exec Command="$(BuildCommand)"
			  LogStandardErrorAsError="true"
			  Condition=" '$(OS)' == 'Windows_NT' " />
	</Target>

	<UsingTask TaskName="DownloadNuGet" TaskFactory="CodeTaskFactory"
		AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll"
		Condition=" '$(OS)' == 'Windows_NT' ">
		<ParameterGroup>
			<OutputFilename ParameterType="System.String" Required="true" />
		</ParameterGroup>
		<Task>
			<Reference Include="System.Core" />
			<Using Namespace="System" />
			<Using Namespace="System.IO" />
			<Using Namespace="System.Net" />
			<Using Namespace="Microsoft.Build.Framework" />
			<Using Namespace="Microsoft.Build.Utilities" />
			<Code Type="Fragment" Language="cs">
				<![CDATA[
				try {
					OutputFilename = Path.GetFullPath(OutputFilename);

					Log.LogMessage("Downloading latest version of NuGet.exe...");
					WebClient webClient = new WebClient();
					webClient.DownloadFile("https://dist.nuget.org/win-x86-commandline/latest/nuget.exe", OutputFilename);

					return true;
				}
				catch (Exception ex) {
					Log.LogErrorFromException(ex);
					return false;
				}
			]]>
			</Code>
		</Task>
	</UsingTask>
</Project>