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Upgrade to JSPool 3.0 #421
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,86 @@ | ||
/* | ||
* Copyright (c) 2017-Present, Facebook, Inc. | ||
* All rights reserved. | ||
* | ||
* This source code is licensed under the BSD-style license found in the | ||
* LICENSE file in the root directory of this source tree. An additional grant | ||
* of patent rights can be found in the PATENTS file in the same directory. | ||
*/ | ||
|
||
using System; | ||
using System.Collections.Generic; | ||
using System.Diagnostics; | ||
using System.IO; | ||
using System.Reflection; | ||
|
||
namespace React.MSBuild | ||
{ | ||
/// <summary> | ||
/// Hacks around the fact that it's not possible to do assembly binding redirects in MSBuild. | ||
/// | ||
/// https://github.com/Microsoft/msbuild/issues/1309 | ||
/// http://blog.slaks.net/2013-12-25/redirecting-assembly-loads-at-runtime/ | ||
/// </summary> | ||
public static class AssemblyBindingRedirect | ||
{ | ||
/// <summary> | ||
/// Redirects that have been configured | ||
/// </summary> | ||
private static readonly Dictionary<string, Version> _redirects = new Dictionary<string, Version>(); | ||
|
||
static AssemblyBindingRedirect() | ||
{ | ||
// This is in a static constructor because it needs to run as early as possible | ||
ConfigureRedirect("JavaScriptEngineSwitcher.Core"); | ||
AppDomain.CurrentDomain.AssemblyResolve += ResolveAssembly; | ||
} | ||
|
||
/// <summary> | ||
/// Enables assembly binding redirects | ||
/// </summary> | ||
public static void Enable() | ||
{ | ||
// Intentionally empty. This is just meant to ensure the static constructor | ||
// has run. | ||
} | ||
|
||
/// <summary> | ||
/// Configures a redirect for the specified assembly. Redirects to the version in the bin directory. | ||
/// </summary> | ||
/// <param name="name">Name of the assembly to redirect</param> | ||
private static void ConfigureRedirect(string name) | ||
{ | ||
var currentAssemblyPath = Assembly.GetExecutingAssembly().Location; | ||
var redirectAssemblyPath = Path.Combine( | ||
Path.GetDirectoryName(currentAssemblyPath), | ||
name + ".dll" | ||
); | ||
|
||
try | ||
{ | ||
var realAssembly = Assembly.LoadFile(redirectAssemblyPath); | ||
var version = realAssembly.GetName().Version; | ||
_redirects[name] = version; | ||
} | ||
catch (Exception ex) | ||
{ | ||
Trace.WriteLine("Warning: Could not determine version of " + name + " to use! " + ex.Message); | ||
} | ||
} | ||
|
||
/// <summary> | ||
/// Overrides assembly resolution to redirect if necessary. | ||
/// </summary> | ||
private static Assembly ResolveAssembly(object sender, ResolveEventArgs args) | ||
{ | ||
var requestedAssembly = new AssemblyName(args.Name); | ||
|
||
if (_redirects.ContainsKey(requestedAssembly.Name) && requestedAssembly.Version != _redirects[requestedAssembly.Name]) | ||
{ | ||
requestedAssembly.Version = _redirects[requestedAssembly.Name]; | ||
return Assembly.Load(requestedAssembly); | ||
} | ||
return null; | ||
} | ||
} | ||
} |
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This is probably not needed... The call site could just call
Dispose
on the engine directly.