private void ResolveDependencies(Dictionary <LibraryKey, LibraryDescription> libraries,
ReferenceAssemblyDependencyResolver referenceAssemblyDependencyResolver,
out bool requiresFrameworkAssemblies)
{
// Remark: the LibraryType in the key of the given dictionary are all "Unspecified" at the beginning.
requiresFrameworkAssemblies = false;
foreach (var pair in libraries.ToList())
{
var library = pair.Value;
// The System.* packages provide placeholders on any non netstandard platform
// To make them work seamlessly on those platforms, we fill the gap with a reference
// assembly (if available)
var package = library as PackageDescription;
if (package != null &&
package.Resolved &&
package.HasCompileTimePlaceholder &&
!TargetFramework.IsPackageBased)
{
// requiresFrameworkAssemblies is true whenever we find a CompileTimePlaceholder in a non-package based framework, even if
// the reference is unresolved. This ensures the best error experience when someone is building on a machine without
// the target framework installed.
requiresFrameworkAssemblies = true;
var newKey = new LibraryKey(library.Identity.Name, LibraryType.Reference);
var dependency = new ProjectLibraryDependency
{
LibraryRange = new LibraryRange(library.Identity.Name, LibraryDependencyTarget.Reference)
};
var replacement = referenceAssemblyDependencyResolver.GetDescription(dependency, TargetFramework);
// If the reference is unresolved, just skip it. Don't replace the package dependency
if (replacement == null)
{
continue;
}
// Remove the original package reference
libraries.Remove(pair.Key);
// Insert a reference assembly key if there isn't one
if (!libraries.ContainsKey(newKey))
{
libraries[newKey] = replacement;
}
}
}
foreach (var pair in libraries.ToList())
{
var library = pair.Value;
library.Framework = library.Framework ?? TargetFramework;
foreach (var dependency in library.Dependencies)
{
var keyType = dependency.LibraryRange.TypeConstraint == LibraryDependencyTarget.Reference ?
LibraryType.Reference :
(LibraryType?)null;
var key = new LibraryKey(dependency.Name, keyType);
LibraryDescription dependencyDescription;
if (!libraries.TryGetValue(key, out dependencyDescription))
{
if (keyType == LibraryType.Reference)
{
// a dependency is specified to be reference assembly but fail to match
// then add a unresolved dependency
dependencyDescription = referenceAssemblyDependencyResolver.GetDescription(dependency, TargetFramework) ??
UnresolvedDependencyProvider.GetDescription(dependency, TargetFramework);
libraries[key] = dependencyDescription;
}
else if (!libraries.TryGetValue(new LibraryKey(dependency.Name, LibraryType.Reference), out dependencyDescription))
{
// a dependency which type is unspecified fails to match, then try to find a
// reference assembly type dependency
dependencyDescription = UnresolvedDependencyProvider.GetDescription(dependency, TargetFramework);
libraries[key] = dependencyDescription;
}
}
dependencyDescription.RequestedRanges.Add(dependency);
dependencyDescription.Parents.Add(library);
}
}
// Deduplicate libraries with the same name
// Priority list is backwards so not found -1 would be last when sorting by descending
var priorities = new[] { LibraryType.Package, LibraryType.Project, LibraryType.Reference };
var nameGroups = libraries.Keys.ToLookup(libraryKey => libraryKey.Name);
foreach (var nameGroup in nameGroups)
{
var librariesToRemove = nameGroup
.OrderByDescending(libraryKey => Array.IndexOf(priorities, libraryKey.LibraryType))
.Skip(1);
foreach (var library in librariesToRemove)
{
libraries.Remove(library);
}
}
}
public ProjectContext Build()
{
var diagnostics = new List <DiagnosticMessage>();
ProjectDirectory = Project?.ProjectDirectory ?? ProjectDirectory;
GlobalSettings globalSettings = null;
if (ProjectDirectory != null)
{
RootDirectory = ProjectRootResolver.ResolveRootDirectory(ProjectDirectory);
GlobalSettings.TryGetGlobalSettings(RootDirectory, out globalSettings);
}
RootDirectory = globalSettings?.DirectoryPath ?? RootDirectory;
FrameworkReferenceResolver frameworkReferenceResolver;
if (string.IsNullOrEmpty(ReferenceAssembliesPath))
{
// Use the default static resolver
frameworkReferenceResolver = FrameworkReferenceResolver.Default;
}
else
{
frameworkReferenceResolver = new FrameworkReferenceResolver(ReferenceAssembliesPath);
}
LockFileLookup lockFileLookup = null;
EnsureProjectLoaded();
ReadLockFile(diagnostics);
// some callers only give ProjectContextBuilder a LockFile
ProjectDirectory = ProjectDirectory ?? TryGetProjectDirectoryFromLockFile();
INuGetPathContext nugetPathContext = null;
if (ProjectDirectory != null)
{
nugetPathContext = NuGetPathContext.Create(ProjectDirectory);
}
PackagesDirectory = PackagesDirectory ?? nugetPathContext?.UserPackageFolder;
var validLockFile = true;
string lockFileValidationMessage = null;
if (LockFile != null)
{
if (Project != null)
{
validLockFile = LockFile.IsValidForProject(Project, out lockFileValidationMessage);
}
lockFileLookup = new LockFileLookup(LockFile);
}
var libraries = new Dictionary <LibraryKey, LibraryDescription>();
var projectResolver = new ProjectDependencyProvider(ProjectResolver);
ProjectDescription mainProject = null;
if (Project != null)
{
mainProject = projectResolver.GetDescription(TargetFramework, Project, targetLibrary: null);
// Add the main project
libraries.Add(new LibraryKey(mainProject.Identity.Name), mainProject);
}
ProjectLibraryDependency platformDependency = null;
if (mainProject != null)
{
platformDependency = mainProject.Dependencies
.Where(d => d.Type.Equals(LibraryDependencyType.Platform))
.Cast <ProjectLibraryDependency>()
.FirstOrDefault();
}
bool isPortable = platformDependency != null;
LockFileTarget target = null;
LibraryDescription platformLibrary = null;
if (lockFileLookup != null)
{
target = SelectTarget(LockFile, isPortable);
if (target != null)
{
var nugetPackageResolver = new PackageDependencyProvider(nugetPathContext, frameworkReferenceResolver);
var msbuildProjectResolver = new MSBuildDependencyProvider(Project, ProjectResolver);
ScanLibraries(target, lockFileLookup, libraries, msbuildProjectResolver, nugetPackageResolver, projectResolver);
if (platformDependency != null)
{
libraries.TryGetValue(new LibraryKey(platformDependency.Name), out platformLibrary);
}
}
}
string runtime = target?.RuntimeIdentifier;
if (string.IsNullOrEmpty(runtime) && TargetFramework.IsDesktop())
{
// we got a ridless target for desktop so turning portable mode on
isPortable = true;
var legacyRuntime = RuntimeEnvironmentRidExtensions.GetLegacyRestoreRuntimeIdentifier();
if (RuntimeIdentifiers.Contains(legacyRuntime))
{
runtime = legacyRuntime;
}
else
{
runtime = RuntimeIdentifiers.FirstOrDefault();
}
}
var referenceAssemblyDependencyResolver = new ReferenceAssemblyDependencyResolver(frameworkReferenceResolver);
bool requiresFrameworkAssemblies;
// Resolve the dependencies
ResolveDependencies(libraries, referenceAssemblyDependencyResolver, out requiresFrameworkAssemblies);
// REVIEW: Should this be in NuGet (possibly stored in the lock file?)
if (LockFile == null)
{
diagnostics.Add(new DiagnosticMessage(
ErrorCodes.NU1009,
$"The expected lock file doesn't exist. Please run \"dotnet restore\" to generate a new lock file.",
Path.Combine(Project.ProjectDirectory, LockFileFormat.LockFileName),
DiagnosticMessageSeverity.Error));
}
if (!validLockFile)
{
diagnostics.Add(new DiagnosticMessage(
ErrorCodes.NU1006,
$"{lockFileValidationMessage}. Please run \"dotnet restore\" to generate a new lock file.",
Path.Combine(Project.ProjectDirectory, LockFileFormat.LockFileName),
DiagnosticMessageSeverity.Warning));
}
if (requiresFrameworkAssemblies)
{
var frameworkInfo = Project.GetTargetFramework(TargetFramework);
if (frameworkReferenceResolver == null || string.IsNullOrEmpty(frameworkReferenceResolver.ReferenceAssembliesPath))
{
// If there was an attempt to use reference assemblies but they were not installed
// report an error
diagnostics.Add(new DiagnosticMessage(
ErrorCodes.DOTNET1012,
$"The reference assemblies directory was not specified. You can set the location using the DOTNET_REFERENCE_ASSEMBLIES_PATH environment variable.",
filePath: Project.ProjectFilePath,
severity: DiagnosticMessageSeverity.Error,
startLine: frameworkInfo.Line,
startColumn: frameworkInfo.Column
));
}
else if (!frameworkReferenceResolver.IsInstalled(TargetFramework))
{
// If there was an attempt to use reference assemblies but they were not installed
// report an error
diagnostics.Add(new DiagnosticMessage(
ErrorCodes.DOTNET1011,
$"Framework not installed: {TargetFramework.DotNetFrameworkName} in {ReferenceAssembliesPath}",
filePath: Project.ProjectFilePath,
severity: DiagnosticMessageSeverity.Error,
startLine: frameworkInfo.Line,
startColumn: frameworkInfo.Column
));
}
}
List <DiagnosticMessage> allDiagnostics = new List <DiagnosticMessage>(diagnostics);
if (Project != null)
{
allDiagnostics.AddRange(Project.Diagnostics);
}
// Create a library manager
var libraryManager = new LibraryManager(libraries.Values.ToList(), allDiagnostics, Project?.ProjectFilePath);
return(new ProjectContext(
globalSettings,
mainProject,
platformLibrary,
TargetFramework,
isPortable,
runtime,
PackagesDirectory,
libraryManager,
LockFile,
diagnostics));
}