/// <summary>
/// Determine what packages need to have their init.ps1 scripts executed based on the provided restore result.
/// When a restore happens, new packages can be introduced (because the project.json was updated since the last
/// restore) or existing packages can be installed (because the global packages folder was cleared or a restore
/// has never been run on an existing project.json). In both of these cases, the init.ps1 scripts should be
/// executed. Also, the init.ps1 scripts should be executed in dependency order, however it is the
/// resposibility of <see cref="ExecuteInitPs1ScriptsAsync(BuildIntegratedNuGetProject, IEnumerable{PackageIdentity}, FallbackPackagePathResolver, INuGetProjectContext)"/>
/// to do this.
/// </summary>
/// <param name="restoreResult">The restore result to examine.</param>
/// <returns>The packages to execute init.ps1 scripts.</returns>
public static IReadOnlyList <PackageIdentity> GetPackagesToExecuteInitPs1(RestoreResult restoreResult)
{
Debug.Assert(restoreResult.Success, "We should not be executing init.ps1 scripts after a failed restore.");
// Packages added from the previous restore.
var addedPackages = GetAddedPackages(restoreResult.PreviousLockFile, restoreResult.LockFile);
// Packages that were not installed before.
var installedPackages = restoreResult
.GetAllInstalled()
.Where(library => library.Type == LibraryType.Package)
.Select(library => new PackageIdentity(library.Name, library.Version));
// Get unique package identities.
var newPackages = new HashSet <PackageIdentity>(addedPackages.Concat(installedPackages));
return(newPackages.ToList());
}
