[SOLVED] Msbuild: Filter itemgroup based on file contents

Msbuild: Filter itemgroup based on file contents

I need to filter an ItemGroup (containing filenames) based on the contents of the file. But I cannot get this to work.

  <ItemGroup>
      <FilteredFiles Include="@(AllFiles)" 
      Condition="$([System.IO.File]::ReadAllText(%(Identity)).Contains('searchText'))" />
  </ItemGroup>

I get this error:

error MSB4184: The expression "[System.IO.File]::ReadAl lText(%(Identity))" cannot be evaluated. Could not find file 'C:\builds\git\RadarTemp%(Identity)'

Any suggestions?

Solution

I belive the most compatible way would be to use an intermediate item:

<ItemGroup>
  <AllFilesWithSearchResult Include="@(AllFiles)" 
    ContainsSearchText="$([System.IO.File]::ReadAllText('%(Identity)').Contains('searchText'))" />
  <FilteredFiles Include="@(AllFilesWithSearchResult->WithMetadataValue('ContainsSearchText','True'))"/>
</ItemGroup>