/* Given a set of available frameworks ("InboxOnTargetFrameworks"), and a list of desired frameworks,
* reduce the set of frameworks to the minimum set of frameworks which is compatible (preferring inbox frameworks. */
public override bool Execute()
{
if (null == Dependencies)
{
Log.LogError("Dependencies argument must be specified");
return(false);
}
if (null == FrameworkListsPath)
{
Log.LogError("FrameworkListsPath argument must be specified");
return(false);
}
// Retrieve the list of generation dependency group TFM's
var dependencyGroups = Dependencies.GroupBy(d => d.GetMetadata("TargetFramework")).Select(dg => new
{
Framework = NuGetFramework.Parse(dg.Key),
Dependencies = dg.ToArray()
});
List <ITaskItem> addedDependencies = new List <ITaskItem>();
// Exclude any non-portable frameworks that already have specific dependency groups.
var frameworksToExclude = dependencyGroups.Select(dg => dg.Framework).Where(fx => !FrameworkUtilities.IsGenerationMoniker(fx));
// Prepare a resolver for evaluating if candidate frameworks are actually supported by the package
PackageItem[] packageItems = Files.Select(f => new PackageItem(f)).ToArray();
var packagePaths = packageItems.Select(pi => pi.TargetPath);
var targetFrameworksWithPlaceHolders = packageItems.Where(pi => NuGetAssetResolver.IsPlaceholder(pi.TargetPath)).Select(pi => pi.TargetFramework);
NuGetAssetResolver resolver = new NuGetAssetResolver(null, packagePaths);
foreach (var portableDependencyGroup in dependencyGroups.Where(dg => FrameworkUtilities.IsGenerationMoniker(dg.Framework)))
{
// Determine inbox frameworks for this generation that don't already have explicit groups
HashSet <NuGetFramework> inboxFrameworksList = new HashSet <NuGetFramework>(
Frameworks.GetAlllInboxFrameworks(FrameworkListsPath)
.Where(fx => !fx.IsPCL)
.Where(fx => Generations.DetermineGenerationForFramework(fx, UseNetPlatform) >= portableDependencyGroup.Framework.Version &&
!frameworksToExclude.Any(exFx => exFx.Framework == fx.Framework && exFx.Version <= fx.Version)));
// Check for assets which have a ref, but not a lib asset. If we have any of these, then they are actually not supported frameworks
// and we should not include them.
inboxFrameworksList.RemoveWhere(inboxFx => !IsSupported(inboxFx, resolver));
// Only add the lowest version for a particular inbox framework. EG if both net45 and net46 are supported by this generation,
// only add net45
inboxFrameworksList.RemoveWhere(fx => inboxFrameworksList.Any(otherFx => (otherFx.Framework.Equals(fx.Framework)) && (otherFx.Version < fx.Version)));
// Create dependency items for each inbox framework.
foreach (var framework in inboxFrameworksList)
{
bool addedDependencyToFramework = false;
foreach (ITaskItem dependency in portableDependencyGroup.Dependencies)
{
string version = GetVersion(dependency);
if (!Frameworks.IsInbox(FrameworkListsPath, framework, dependency.ItemSpec, version))
{
addedDependencyToFramework = true;
AddDependency(addedDependencies, new TaskItem(dependency), framework, portableDependencyGroup.Framework);
}
}
if (!addedDependencyToFramework)
{
AddDependency(addedDependencies, new TaskItem("_._"), framework, portableDependencyGroup.Framework);
}
}
}
// Collapse frameworks
// For any dependency with a targetframework, if there is another target framework which is compatible and older, remove this dependency.
// Get all Dependencies which are not in a portable dependency group so that we can collapse the frameworks. If we include
// the portable frameworks, then we'll end up collapsing to those.
List <NuGetFramework> allDependencyGroups = new List <NuGetFramework>();
allDependencyGroups.AddRange(Dependencies.Select(d => NuGetFramework.Parse(d.GetMetadata("TargetFramework"))).Where(a => !allDependencyGroups.Contains(a) &&
!FrameworkUtilities.IsGenerationMoniker(a) &&
!FrameworkUtilities.IsPortableMoniker(a)));
allDependencyGroups.AddRange(addedDependencies.Select(d => NuGetFramework.Parse(d.GetMetadata("TargetFramework"))).Where(a => !allDependencyGroups.Contains(a) &&
!FrameworkUtilities.IsGenerationMoniker(a) &&
!FrameworkUtilities.IsPortableMoniker(a)));
List <NuGetFramework> collapsedDependencyGroups = FrameworkUtilities.ReduceDownwards(allDependencyGroups).ToList <NuGetFramework>();
// Get the list of dependency groups that we collapsed down so that we can add them back if they contained different dependencies than what is present in the collapsed group.
/* TODO: Look into NuGet's sorting algorithm, they may have a bug (fixed in this line). They were not including version in the sort.
* See ReduceCore in https://github.com/NuGet/NuGet.Client/blob/23ea68b91a439fcfd7f94bcd01bcdee2e8adae92/src/NuGet.Core/NuGet.Frameworks/FrameworkReducer.cs */
IEnumerable <NuGetFramework> removedDependencyGroups = allDependencyGroups.Where(d => !collapsedDependencyGroups.Contains(d))?.OrderBy(f => f.Framework, StringComparer.OrdinalIgnoreCase).ThenBy(f => f.Version);
foreach (NuGetFramework removedDependencyGroup in removedDependencyGroups)
{
// always recalculate collapsedDependencyGroups in case we added an item in a previous iteration. Dependency groups are sorted, so this should be additive and we shouldn't need to restart the collapse / add back cycle
var nearest = FrameworkUtilities.GetNearest(removedDependencyGroup, collapsedDependencyGroups.ToArray());
// gather the dependencies for this dependency group and the calculated "nearest" dependency group
var nearestDependencies = addedDependencies.Where(d => nearest.Equals(NuGetFramework.Parse(d.GetMetadata("TargetFramework")))).OrderBy(f => f.ToString());
var currentDependencies = addedDependencies.Where(d => removedDependencyGroup.Equals(NuGetFramework.Parse(d.GetMetadata("TargetFramework")))).OrderBy(f => f.ToString());
// The nearest dependency group's dependencies are different than this dependency group's dependencies
if (nearestDependencies.Count() != currentDependencies.Count())
{
// ignore if dependency is a placeholder
if (currentDependencies.Count() > 0)
{
if (!NuGetAssetResolver.IsPlaceholder(currentDependencies.First().ToString()))
{
collapsedDependencyGroups.Add(removedDependencyGroup);
}
}
else
{
collapsedDependencyGroups.Add(removedDependencyGroup);
}
}
// identical dependency count between current and nearest, and the count is > 0
else if (nearestDependencies.Count() > 0)
{
if (!currentDependencies.SequenceEqual(nearestDependencies, new DependencyITaskItemComparer()))
{
collapsedDependencyGroups.Add(removedDependencyGroup);
}
}
}
List <ITaskItem> collapsedDependencies = new List <ITaskItem>();
foreach (ITaskItem dependency in addedDependencies)
{
if (collapsedDependencyGroups.Contains(NuGetFramework.Parse(dependency.GetMetadata("TargetFramework"))))
{
collapsedDependencies.Add(dependency);
}
}
TrimmedDependencies = collapsedDependencies.ToArray();
return(!Log.HasLoggedErrors);
}
/* Given a set of available frameworks ("InboxOnTargetFrameworks"), and a list of desired frameworks,
* reduce the set of frameworks to the minimum set of frameworks which is compatible (preferring inbox frameworks. */
public override bool Execute()
{
if (null == Dependencies)
{
Log.LogError("Dependencies argument must be specified");
return(false);
}
if (null == FrameworkListsPath)
{
Log.LogError("FrameworkListsPath argument must be specified");
return(false);
}
// Retrieve the list of generation dependency group TFM's
Dictionary <string, IEnumerable <ITaskItem> > portableDependencyGroups = new Dictionary <string, IEnumerable <ITaskItem> >();
foreach (ITaskItem dependency in Dependencies)
{
string framework = dependency.GetMetadata("TargetFramework");
if (framework != null && FrameworkUtilities.IsGenerationMoniker(framework) && !portableDependencyGroups.ContainsKey(framework))
{
portableDependencyGroups.Add(framework, Dependencies.Where(d => d.GetMetadata("TargetFramework") == framework));
}
}
List <ITaskItem> addedDependencies = new List <ITaskItem>();
List <string> placeHolderFrameworks = new List <string>();
var frameworksToExclude = TrimFrameworks?.Select(fx => NuGetFramework.Parse(fx))?.ToArray() ?? new NuGetFramework[0];
// Prepare a resolver for evaluating if candidate frameworks are actually supported by the package
PackageItem[] packageItems = Files.Select(f => new PackageItem(f)).ToArray();
var packagePaths = packageItems.Select(pi => pi.TargetPath);
var targetFrameworksWithPlaceHolders = packageItems.Where(pi => NuGetAssetResolver.IsPlaceholder(pi.TargetPath)).Select(pi => pi.TargetFramework);
NuGetAssetResolver resolver = new NuGetAssetResolver(null, packagePaths);
foreach (string portableDependency in portableDependencyGroups.Keys)
{
NuGetFramework portableDependencyFramework = NuGetFramework.Parse(portableDependency);
// Determine inbox frameworks for this generations dependencies as a whole
HashSet <NuGetFramework> inboxFrameworksList = new HashSet <NuGetFramework>();
foreach (NuGetFramework inboxFramework in Frameworks.GetAlllInboxFrameworks(FrameworkListsPath))
{
if (Generations.DetermineGenerationForFramework(inboxFramework, UseNetPlatform) >= portableDependencyFramework.Version &&
!frameworksToExclude.Contains(inboxFramework))
{
inboxFrameworksList.Add(inboxFramework);
}
}
// Only add the lowest version for a particular inbox framework. EG if both net45 and net46 are supported by this generation,
// only add net45
inboxFrameworksList.RemoveWhere(fx => inboxFrameworksList.Any(otherFx => (otherFx.Framework.Equals(fx.Framework)) && (otherFx.Version < fx.Version)));
// Check for assets which have a ref, but not a lib asset. If we have any of these, then they are actually not supported frameworks
// and we should not include them.
inboxFrameworksList.RemoveWhere(inboxFx => !IsSupported(inboxFx, resolver));
// Remove the frameworks which have placeholders.
inboxFrameworksList.RemoveWhere(fx => targetFrameworksWithPlaceHolders.Any(tfx => tfx != null && fx.DotNetFrameworkName == tfx.DotNetFrameworkName));
// Create dependency items for each inbox framework.
foreach (string framework in inboxFrameworksList.Select(fx => fx.GetShortFolderName()))
{
bool addedDependencyToFramework = false;
foreach (ITaskItem dependency in portableDependencyGroups[portableDependency])
{
// If we don't have the AssemblyVersion metadata (4 part version string), fall back and use Version (3 part version string)
string version = dependency.GetMetadata("AssemblyVersion");
if (string.IsNullOrEmpty(version))
{
version = dependency.GetMetadata("Version");
int prereleaseIndex = version.IndexOf('-');
if (prereleaseIndex != -1)
{
version = version.Substring(0, prereleaseIndex);
}
}
if (!Frameworks.IsInbox(FrameworkListsPath, framework, dependency.ItemSpec, version))
{
addedDependencyToFramework = true;
TaskItem dependencyItem = new TaskItem(dependency);
dependencyItem.SetMetadata("TargetFramework", framework);
// "Generation" is not required metadata, we just include it because it can be useful for debugging.
dependencyItem.SetMetadata("Generation", portableDependency);
addedDependencies.Add(dependencyItem);
}
}
if (!addedDependencyToFramework)
{
TaskItem dependencyItem = new TaskItem("_._");
dependencyItem.SetMetadata("TargetFramework", framework);
// "Generation" is not required metadata, we just include it because it can be useful for debugging.
dependencyItem.SetMetadata("Generation", portableDependency);
addedDependencies.Add(dependencyItem);
placeHolderFrameworks.Add(framework);
}
}
}
// Collapse frameworks
// For any dependency with a targetframework, if there is another target framework which is compatible and older, remove this dependency.
// Get all Dependencies which are not in a portable dependency group so that we can collapse the frameworks. If we include
// the portable frameworks, then we'll end up collapsing to those.
List <NuGetFramework> allDependencyGroups = new List <NuGetFramework>();
allDependencyGroups.AddRange(Dependencies.Select(d => NuGetFramework.Parse(d.GetMetadata("TargetFramework"))).Where(a => !allDependencyGroups.Contains(a) &&
!FrameworkUtilities.IsGenerationMoniker(a) &&
!FrameworkUtilities.IsPortableMoniker(a)));
allDependencyGroups.AddRange(addedDependencies.Select(d => NuGetFramework.Parse(d.GetMetadata("TargetFramework"))).Where(a => !allDependencyGroups.Contains(a) &&
!FrameworkUtilities.IsGenerationMoniker(a) &&
!FrameworkUtilities.IsPortableMoniker(a)));
List <NuGetFramework> collapsedDependencyGroups = FrameworkUtilities.ReduceDownwards(allDependencyGroups).ToList <NuGetFramework>();
// Get the list of dependency groups that we collapsed down so that we can add them back if they contained different dependencies than what is present in the collapsed group.
/* TODO: Look into NuGet's sorting algorithm, they may have a bug (fixed in this line). They were not including version in the sort.
* See ReduceCore in https://github.com/NuGet/NuGet.Client/blob/23ea68b91a439fcfd7f94bcd01bcdee2e8adae92/src/NuGet.Core/NuGet.Frameworks/FrameworkReducer.cs */
IEnumerable <NuGetFramework> removedDependencyGroups = allDependencyGroups.Where(d => !collapsedDependencyGroups.Contains(d))?.OrderBy(f => f.Framework, StringComparer.OrdinalIgnoreCase).ThenBy(f => f.Version);
foreach (NuGetFramework removedDependencyGroup in removedDependencyGroups)
{
// always recalculate collapsedDependencyGroups in case we added an item in a previous iteration. Dependency groups are sorted, so this should be additive and we shouldn't need to restart the collapse / add back cycle
var nearest = FrameworkUtilities.GetNearest(removedDependencyGroup, collapsedDependencyGroups.ToArray());
// gather the dependencies for this dependency group and the calculated "nearest" dependency group
var nearestDependencies = addedDependencies.Where(d => nearest.Equals(NuGetFramework.Parse(d.GetMetadata("TargetFramework")))).OrderBy(f => f.ToString());
var currentDependencies = addedDependencies.Where(d => removedDependencyGroup.Equals(NuGetFramework.Parse(d.GetMetadata("TargetFramework")))).OrderBy(f => f.ToString());
// The nearest dependency group's dependencies are different than this dependency group's dependencies
if (nearestDependencies.Count() != currentDependencies.Count())
{
// ignore if dependency is a placeholder
if (currentDependencies.Count() > 0)
{
if (!NuGetAssetResolver.IsPlaceholder(currentDependencies.First().ToString()))
{
collapsedDependencyGroups.Add(removedDependencyGroup);
}
}
else
{
collapsedDependencyGroups.Add(removedDependencyGroup);
}
}
// identical dependency count between current and nearest, and the count is > 0
else if (nearestDependencies.Count() > 0)
{
if (!currentDependencies.SequenceEqual(nearestDependencies, new DependencyITaskItemComparer()))
{
collapsedDependencyGroups.Add(removedDependencyGroup);
}
}
}
List <ITaskItem> collapsedDependencies = new List <ITaskItem>();
foreach (ITaskItem dependency in addedDependencies)
{
if (collapsedDependencyGroups.Contains(NuGetFramework.Parse(dependency.GetMetadata("TargetFramework"))))
{
collapsedDependencies.Add(dependency);
}
}
TrimmedDependencies = collapsedDependencies.ToArray();
return(!Log.HasLoggedErrors);
}