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  • <?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)' == '' ">false</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' ">true</RequireRestoreConsent>
    
            <!-- Download NuGet.exe if it does not already exist -->
            <DownloadNuGetExe Condition=" '$(DownloadNuGetExe)' == '' ">false</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://www.nuget.org/api/v2/) will be excluded if package sources are specified and it does not appear in the list -->
            <!--
                <PackageSource Include="https://www.nuget.org/api/v2/" />
                <PackageSource Include="https://my-nuget-source/nuget/" />
            -->
        </ItemGroup>
    
        <PropertyGroup Condition=" '$(OS)' == 'Windows_NT'">
            <!-- Windows specific commands -->
            <NuGetToolsPath>$([System.IO.Path]::Combine($(SolutionDir), ".nuget"))</NuGetToolsPath>
        </PropertyGroup>
    
        <PropertyGroup Condition=" '$(OS)' != 'Windows_NT'">
            <!-- We need to launch nuget.exe with the mono command if we're not on windows -->
            <NuGetToolsPath>$(SolutionDir).nuget</NuGetToolsPath>
        </PropertyGroup>
    
        <PropertyGroup>
            <PackagesProjectConfig Condition=" '$(OS)' == 'Windows_NT'">$(MSBuildProjectDirectory)\packages.$(MSBuildProjectName.Replace(' ', '_')).config</PackagesProjectConfig>
            <PackagesProjectConfig Condition=" '$(OS)' != 'Windows_NT'">$(MSBuildProjectDirectory)\packages.$(MSBuildProjectName).config</PackagesProjectConfig>
        </PropertyGroup>
    
        <PropertyGroup>
          <PackagesConfig Condition="Exists('$(MSBuildProjectDirectory)\packages.config')">$(MSBuildProjectDirectory)\packages.config</PackagesConfig>
          <PackagesConfig Condition="Exists('$(PackagesProjectConfig)')">$(PackagesProjectConfig)</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>
    
            <PaddedSolutionDir Condition=" '$(OS)' == 'Windows_NT'">"$(SolutionDir) "</PaddedSolutionDir>
            <PaddedSolutionDir Condition=" '$(OS)' != 'Windows_NT' ">"$(SolutionDir)"</PaddedSolutionDir>
    
            <!-- Commands -->
            <RestoreCommand>$(NuGetCommand) install "$(PackagesConfig)" -source "$(PackageSources)"  $(NonInteractiveSwitch) $(RequireConsentSwitch) -solutionDir $(PaddedSolutionDir)</RestoreCommand>
            <BuildCommand>$(NuGetCommand) pack "$(ProjectPath)" -Properties "Configuration=$(Configuration);Platform=$(Platform)" $(NonInteractiveSwitch) -OutputDirectory "$(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">
            <DownloadNuGet OutputFilename="$(NuGetExePath)" Condition=" '$(DownloadNuGetExe)' == 'true' AND !Exists('$(NuGetExePath)')" />
        </Target>
    
        <Target Name="RestorePackages" DependsOnTargets="CheckPrerequisites">        
            <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">
            <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://www.nuget.org/nuget.exe", OutputFilename);
    
                        return true;
                    }
                    catch (Exception ex) {
                        Log.LogErrorFromException(ex);
                        return false;
                    }
                ]]>
                </Code>
            </Task>
        </UsingTask>
    </Project>