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//
// AssemblyResolver.cs
//
// Author:
// Jb Evain (jbevain@novell.com)
//
// (C) 2007 Novell, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.IO;
using Mono.Cecil;
using Mono.Collections.Generic;
namespace Mono.Linker
{
#if FEATURE_ILLINK
public class AssemblyResolver : DirectoryAssemblyResolver {
#else
public class AssemblyResolver : BaseAssemblyResolver
{
#endif
readonly Dictionary<string, AssemblyDefinition> _assemblies;
HashSet<string> _unresolvedAssemblies;
bool _ignoreUnresolved;
LinkContext _context;
readonly Collection<string> _references;
public IDictionary<string, AssemblyDefinition> AssemblyCache {
get { return _assemblies; }
}
public AssemblyResolver ()
: this (new Dictionary<string, AssemblyDefinition> (StringComparer.OrdinalIgnoreCase))
{
}
public AssemblyResolver (Dictionary<string, AssemblyDefinition> assembly_cache)
{
_assemblies = assembly_cache;
_references = new Collection<string> () { };
}
public bool IgnoreUnresolved {
get { return _ignoreUnresolved; }
set { _ignoreUnresolved = value; }
}
public LinkContext Context {
get { return _context; }
set { _context = value; }
}
#if !FEATURE_ILLINK
// The base class's definition of GetAssembly is visible when using DirectoryAssemblyResolver.
AssemblyDefinition GetAssembly (string file, ReaderParameters parameters)
{
if (parameters.AssemblyResolver == null)
parameters.AssemblyResolver = this;
return ModuleDefinition.ReadModule (file, parameters).Assembly;
}
#endif
public string GetAssemblyFileName (AssemblyDefinition assembly)
{
#if FEATURE_ILLINK
if (assemblyToPath.TryGetValue(assembly, out string path)) {
return path;
}
else
#endif
{
// Must be an assembly that we didn't open through the resolver
return assembly.MainModule.FileName;
}
}
AssemblyDefinition ResolveFromReferences (AssemblyNameReference name, Collection<string> references, ReaderParameters parameters)
{
var fileName = name.Name + ".dll";
foreach (var reference in references) {
if (Path.GetFileName (reference) != fileName)
continue;
try {
return GetAssembly (reference, parameters);
} catch (BadImageFormatException) {
continue;
}
}
return null;
}
public AssemblyDefinition ResolveFromPath (string path, ReaderParameters parameters)
{
return CacheAssembly (GetAssembly (path, parameters));
}
public override AssemblyDefinition Resolve (AssemblyNameReference name, ReaderParameters parameters)
{
// Validate arguments, similarly to how the base class does it.
if (name == null)
throw new ArgumentNullException (nameof (name));
if (parameters == null)
throw new ArgumentNullException (nameof (parameters));
if (!_assemblies.TryGetValue (name.Name, out AssemblyDefinition asm) && (_unresolvedAssemblies == null || !_unresolvedAssemblies.Contains (name.Name))) {
try {
// Any full path explicit reference takes precedence over other look up logic
asm = ResolveFromReferences (name, _references, parameters);
// Fall back to the base class resolution logic
if (asm == null)
asm = base.Resolve (name, parameters);
_assemblies[name.Name] = asm;
} catch (AssemblyResolutionException) {
if (!_ignoreUnresolved)
throw;
_context.LogMessage ($"Ignoring unresolved assembly '{name.Name}'.");
if (_unresolvedAssemblies == null)
_unresolvedAssemblies = new HashSet<string> ();
_unresolvedAssemblies.Add (name.Name);
}
}
return asm;
}
public virtual AssemblyDefinition CacheAssembly (AssemblyDefinition assembly)
{
_assemblies[assembly.Name.Name] = assembly;
base.AddSearchDirectory (Path.GetDirectoryName (GetAssemblyFileName (assembly)));
return assembly;
}
public void AddReferenceAssembly (string referencePath)
{
_references.Add (referencePath);
}
protected override void Dispose (bool disposing)
{
foreach (var asm in _assemblies.Values) {
asm.Dispose ();
}
_assemblies.Clear ();
if (_unresolvedAssemblies != null)
_unresolvedAssemblies.Clear ();
base.Dispose (disposing);
}
}
}
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