upgrade enhanced-resolve to v3

Author: johnnyreilly

package.json

@@ -29,7 +29,7 @@
   "homepage": "https://github.com/TypeStrong/ts-loader",
   "dependencies": {
     "colors": "^1.0.3",
-    "enhanced-resolve": "^0.9.0",
+    "enhanced-resolve": "^3.0.0",
     "loader-utils": "^0.2.6",
     "object-assign": "^4.1.0",
     "semver": "^5.0.1"

src/interfaces.ts

@@ -116,8 +116,8 @@ export interface Resolve {
     unsafeCache?: RegExp | RegExp[] | boolean;
 }
 
-export interface Resolver {
-    resolveSync(path: string, moduleName: string): string;
+export interface ResolveSync {
+    (context: string, path: string, moduleName: string): string;
 }
 
 export interface ModuleResolutionHost {

src/resolver.ts

@@ -1,58 +1,9 @@
-// This file serves as a hacky workaround for the lack of "resolveSync" support in webpack.
-// We make our own resolver using a sync file system but using the same plugins & options
-// that webpack does.
 import interfaces = require('./interfaces');
 
-const Resolver = require("enhanced-resolve/lib/Resolver");
-const SyncNodeJsInputFileSystem = require("enhanced-resolve/lib/SyncNodeJsInputFileSystem");
-const CachedInputFileSystem = require("enhanced-resolve/lib/CachedInputFileSystem");
-const UnsafeCachePlugin = require("enhanced-resolve/lib/UnsafeCachePlugin");
-const ModulesInDirectoriesPlugin = require("enhanced-resolve/lib/ModulesInDirectoriesPlugin");
-const ModulesInRootPlugin = require("enhanced-resolve/lib/ModulesInRootPlugin");
-const ModuleAsFilePlugin = require("enhanced-resolve/lib/ModuleAsFilePlugin");
-const ModuleAsDirectoryPlugin = require("enhanced-resolve/lib/ModuleAsDirectoryPlugin");
-const ModuleAliasPlugin = require("enhanced-resolve/lib/ModuleAliasPlugin");
-const DirectoryDefaultFilePlugin = require("enhanced-resolve/lib/DirectoryDefaultFilePlugin");
-const DirectoryDescriptionFilePlugin = require("enhanced-resolve/lib/DirectoryDescriptionFilePlugin");
-const DirectoryDescriptionFileFieldAliasPlugin = require("enhanced-resolve/lib/DirectoryDescriptionFileFieldAliasPlugin");
-const FileAppendPlugin = require("enhanced-resolve/lib/FileAppendPlugin");
-const ResultSymlinkPlugin = require("enhanced-resolve/lib/ResultSymlinkPlugin");
+const node = require("enhanced-resolve/lib/node");
 
-function makeRootPlugin(name: string, root: string | string[]) {
-    if (typeof root === "string") {
-        return new ModulesInRootPlugin(name, root);
-    } else if (Array.isArray(root)) {
-        return function() {
-            root.forEach(function(root) {
-                this.apply(new ModulesInRootPlugin(name, root));
-            }, this);
-        };
-    }
-    return function() {};
-}
-
-function makeResolver(options: { resolve: interfaces.Resolve }) {
-    let fileSystem = new CachedInputFileSystem(new SyncNodeJsInputFileSystem(), 60000);
-
-    let resolver = new Resolver(fileSystem);
-
-    // apply the same plugins that webpack does, see webpack/lib/WebpackOptionsApply.js
-    resolver.apply(
-        new UnsafeCachePlugin(options.resolve.unsafeCache),
-        options.resolve.packageAlias ? new DirectoryDescriptionFileFieldAliasPlugin("package.json", options.resolve.packageAlias) : function() {},
-        new ModuleAliasPlugin(options.resolve.alias),
-        makeRootPlugin("module", options.resolve.root),
-        new ModulesInDirectoriesPlugin("module", options.resolve.modulesDirectories),
-        makeRootPlugin("module", options.resolve.fallback),
-        new ModuleAsFilePlugin("module"),
-        new ModuleAsDirectoryPlugin("module"),
-        new DirectoryDescriptionFilePlugin("package.json", options.resolve.packageMains),
-        new DirectoryDefaultFilePlugin(["index"]),
-        new FileAppendPlugin(options.resolve.extensions),
-        new ResultSymlinkPlugin()
-    );
-
-    return resolver;
+function makeResolver(options: { resolve: interfaces.Resolve }): interfaces.ResolveSync {
+    return node.create.sync(options.resolve);
 }
 
 export = makeResolver;

src/servicesHost.ts

@@ -77,7 +77,7 @@ function makeServicesHost(
 }
 
 function resolveModuleNames(
-    resolver: interfaces.Resolver,
+    resolver: interfaces.ResolveSync,
     moduleResolutionHost: interfaces.ModuleResolutionHost,
     appendTsSuffixTo: RegExp[],
     scriptRegex: RegExp,
@@ -97,7 +97,7 @@ function resolveModuleNames(
 }
 
 function resolveModuleName(
-    resolver: interfaces.Resolver,
+    resolveSync: interfaces.ResolveSync,
     moduleResolutionHost: interfaces.ModuleResolutionHost,
     appendTsSuffixTo: RegExp[],
     scriptRegex: RegExp,
@@ -107,11 +107,11 @@ function resolveModuleName(
     containingFile: string
 ) {
     const { compiler, compilerOptions } = instance;
-
+    
     let resolutionResult: interfaces.ResolvedModule;
 
     try {
-        let resolvedFileName = resolver.resolveSync(path.normalize(path.dirname(containingFile)), moduleName);
+        let resolvedFileName = resolveSync(undefined, path.normalize(path.dirname(containingFile)), moduleName);
         resolvedFileName = utils.appendTsSuffixIfMatch(appendTsSuffixTo, resolvedFileName);
 
         if (resolvedFileName.match(scriptRegex)) {