Did you know? – NuGetGallery Build (part 6)

Last post left off where NuGet.exe was used to download all packages before compiling the project. Let’s talk a little bit about conditions. If you remember from NuGet.targets, here is the target that restores the packages:

<Target Name="RestorePackages" DependsOnTargets="CheckPrerequisites">
    <Exec Command="$(RestoreCommand)"
          LogStandardErrorAsError="true"
          Condition="Exists('$(PackagesConfig)')" />
</Target>

I skipped over its DependsOnTargets=”CheckPrerequisites” attribute, this target is defined on the companion NuGet.settings.targets (in retrospect, I don’t know why there are two .target files where it seems that one would have sufficed):

<Target Name="CheckPrerequisites">
    <!-- Raise an error if we're unable to locate nuget.exe  -->
    <Error Condition="!Exists('$(NuGetExePath)')" Text="Unable to locate '$(NuGetExePath)'" />
</Target>

This is self explanatory, it will error if Nuget.exe was not found. Furthermore, the “RestorePackages” target will error if the packages.config file is not found.

PS: I did left off one piece of the puzzle: precompiling the razor files before building. This is defined in the RazorGenerator.targets which is also imported by Website.csproj.