SharedConfig.targets

<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" InitialTargets="TestDSPGameFolder">
  <PropertyGroup>
    <DevEnv>DevEnv.targets</DevEnv>
    <DevEnvLoc>$(SolutionDir)\$(DevEnv)</DevEnvLoc>
    <DSPGameDir Condition="!Exists('$(DevEnvLoc)')">C:\Program Files (x86)\Steam\steamapps\common\Dyson Sphere Program\</DSPGameDir>
    <PluginImports>$(MSBuildThisFileDirectory)PluginImports.targets</PluginImports>
  </PropertyGroup>

  <Import Project="$(DevEnvLoc)" Condition="Exists('$(DevEnvLoc)')" />

  <Target Name="MaybeCopyDevEnv"
          Inputs="$(MSBuildAllProjects)"
          Outputs="$(DevEnvLoc)"
          Condition="!Exists('$(DSPGameDir)') and !Exists('$(DevEnvLoc)')">

    <Copy SourceFiles="$(DevEnvLoc).example"
          DestinationFiles="$(DevEnvLoc)"
          SkipUnchangedFiles="true" />
    <Error Text="It appears your Dyson Sphere Program installation is not in the default Steam directory. Please set the path correctly in $(DevEnv) (it has been created for you)." />
  </Target>

  <Target Name="DevEnvInvalid"
          Condition="!Exists('$(DSPGameDir)') and Exists('$(DevEnvLoc)')">
    <!-- If the default path is overriden in DevEnv, and it doesn't exist -->
    <Error Text="Your Dyson Sphere Program installation folder has not been found at the path defined in $(DevEnv). Please set it correctly." />
  </Target>

  <!-- Using DependsOnTarget with Conditional targets as an if else structure... -->
  <!-- Note that this is the first target, called by InitialTargets -->
  <Target Name="TestDSPGameFolder"
          DependsOnTargets="MaybeCopyDevEnv;DevEnvInvalid;CreatePluginDirectory"
          Condition="!Exists('$(DSPGameDir)')" />
</Project>