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param($installPath, $toolsPath, $package, $project)
# This is the MSBuild targets file to add
$targetsFile = [System.IO.Path]::Combine($toolsPath, $package.Id + '.targets')
# Need to load MSBuild assembly if it's not loaded yet.
Add-Type -AssemblyName 'Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
# Grab the loaded MSBuild project for the project
$msbuild = [Microsoft.Build.Evaluation.ProjectCollection]::GlobalProjectCollection.GetLoadedProjects($project.FullName) | Select-Object -First 1
# Make the path to the targets file relative.
$projectUri = new-object Uri($project.FullName, [System.UriKind]::Absolute)
$targetUri = new-object Uri($targetsFile, [System.UriKind]::Absolute)
$relativePath = [System.Uri]::UnescapeDataString($projectUri.MakeRelativeUri($targetUri).ToString()).Replace([System.IO.Path]::AltDirectorySeparatorChar, [System.IO.Path]::DirectorySeparatorChar)
# Add the import with a condition, to allow the project to load without the targets present.
$import = $msbuild.Xml.AddImport($relativePath)
$import.Condition = "Exists('$relativePath')"
# Add a target to fail the build when our targets are not imported
$target = $msbuild.Xml.AddTarget("EnsureBclBuildImported")
$target.BeforeTargets = "BeforeBuild"
$target.Condition = "'`$(BclBuildImported)' == ''"
# if the targets don't exist at the time the target runs, package restore didn't run
$errorTask = $target.AddTask("Error")
$errorTask.Condition = "!Exists('$relativePath')"
$errorTask.SetParameter("Text", "This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them. For more information, see http://go.microsoft.com/fwlink/?LinkID=317567.");
$errorTask.SetParameter("HelpKeyword", "BCLBUILD2001");
# if the targets exist at the time the target runs, package restore ran but the build didn't import the targets.
$errorTask = $target.AddTask("Error")
$errorTask.Condition = "Exists('$relativePath')"
$errorTask.SetParameter("Text", "The build restored NuGet packages. Build the project again to include these packages in the build. For more information, see http://go.microsoft.com/fwlink/?LinkID=317568.");
$errorTask.SetParameter("HelpKeyword", "BCLBUILD2002");
$project.Save()
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