MSBuild and $(ProgramFiles) issue with 32/64 bits

Question

I wrote a custom MSBuild task which calls SubWCRev.exe, an executable which (typically) resides in C:\\Program Files\\TortoiseSVN\\bin, whether it\'s 3

Answer 1

Use MSBuildExtensionsPath property instead of hardcoding the path.

Per MSDN:

The MSBuild subfolder under the \Program Files\ or \Program Files (x86) folder. This path always points to the Program Files of the same bitness as the window you are currently running in. For example, for a 32-bit window on a 64-bit machine, the path is to the Program Files (x86) folder. For a 64-bit window on a 64-bit machine, the path is to the Program Files folder. See also MSBuildExtensionsPath32 and MSBuildExtensionsPath64.

Edit: To get to the 64 bit SVN folder, use :

<PropertyGroup>
   <TortoiseSVNPath>$(MSBuildExtensionsPath64)\..\TortoiseSVN\bin</TortoiseSVNPath>
</PropertyGroup>

Another way is to check for existence of folders:

<PropertyGroup>
  <TortoiseSVNPath Condition="Exists('$(PROGRAMFILES) (x86)')">$(PROGRAMFILES) (x86)\TortoiseSVN\bin</TortoiseSVNPath>
  <TortoiseSVNPath Condition="$(TortoiseSVNPath) == ''">$(PROGRAMFILES)\TortoiseSVN\bin</TortoiseSVNPath>
</PropertyGroup>

Answer 2

Take a look it this:

<Project ToolsVersion="4.0" DefaultTargets="PrintValues" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <Target Name="PrintValues">
    <PropertyGroup>
      <MyProgramFiles>$(ProgramW6432)</MyProgramFiles>
      <MyProgramFiles Condition="$(MyProgramFiles) == ''">$(ProgramFiles)</MyProgramFiles>
    </PropertyGroup>

    <Message Text="MyProgramFiles: $(MyProgramFiles)"/>
  </Target>

</Project>

This lets MyProgramFiles resolve to "C:\Program Files" for both 32 and 64 bit Windows (The ProgramW6432 environment variable is empty on non-64 bit versions of Windows).