private Dictionary <string, PackageOverride> BuildPackageOverrides()
{
Dictionary <string, PackageOverride> result;
if (_packageOverrideItems?.Length > 0)
{
result = new Dictionary <string, PackageOverride>(_packageOverrideItems.Length, StringComparer.OrdinalIgnoreCase);
foreach (ITaskItem packageOverrideItem in _packageOverrideItems)
{
PackageOverride packageOverride = PackageOverride.Create(packageOverrideItem);
if (result.TryGetValue(packageOverride.PackageName, out PackageOverride existing))
{
MergePackageOverrides(packageOverride, existing);
}
else
{
result[packageOverride.PackageName] = packageOverride;
}
}
}
else
{
result = null;
}
return(result);
}
/// <summary>
/// Merges newPackageOverride into existingPackageOverride by adding all the new overridden packages
/// and taking the highest version when they both contain the same overridden package.
/// </summary>
private static void MergePackageOverrides(PackageOverride newPackageOverride, PackageOverride existingPackageOverride)
{
foreach (KeyValuePair <string, Version> newOverride in newPackageOverride.OverriddenPackages)
{
if (existingPackageOverride.OverriddenPackages.TryGetValue(newOverride.Key, out Version existingOverrideVersion))
{
if (existingOverrideVersion < newOverride.Value)
{
existingPackageOverride.OverriddenPackages[newOverride.Key] = newOverride.Value;
}
}
else
{
existingPackageOverride.OverriddenPackages[newOverride.Key] = newOverride.Value;
}
}
}
