NuGet.targets

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <PropertyGroup>
        <NuGetToolsPath>$(MSBuildThisFileDirectory)</NuGetToolsPath>
    </PropertyGroup>

    <PropertyGroup>
        <NuGetExePath Condition=" '$(NuGetExePath)' == '' ">$(NuGetToolsPath)NuGet.exe</NuGetExePath>

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

    <Target Name="DownloadNuGetCommandLineClient" Condition="!Exists('$(NuGetExePath)')">
        <DownloadNuGet OutputFilename="$(NuGetExePath)" Condition=" '$(OS)' == 'Windows_NT' "/>
        <Exec Command="curl -L -o &quot;$(NuGetExePath)&quot; https://www.nuget.org/nuget.exe" 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>