Enables custom resolver only if they're used in incremental mode (#260)

* Enables custom resolver only if they're used in incremental mode

* Adds a test

* Updates the changelog

* Bumps patch

Author: arcanis

CHANGELOG.md

@@ -1,3 +1,7 @@
+## v1.1.1
+
+* [Fix a regression w/ plugins like tsconfig-paths-webpack-plugin](https://github.com/Realytics/fork-ts-checker-webpack-plugin/pull/260)
+
 ## v1.1.0
 
 * [Add new custom resolution options](https://github.com/Realytics/fork-ts-checker-webpack-plugin/pull/250)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "fork-ts-checker-webpack-plugin",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "Runs typescript type checker and linter on separate process.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",

src/CompilerHost.ts

@@ -2,11 +2,7 @@
 import * as ts from 'typescript'; // Imported for types alone
 import { LinkedList } from './LinkedList';
 import { VueProgram } from './VueProgram';
-import {
-  ResolveModuleName,
-  ResolveTypeReferenceDirective,
-  makeResolutionFunctions
-} from './resolution';
+import { ResolveModuleName, ResolveTypeReferenceDirective } from './resolution';
 
 interface DirectoryWatchDelaySlot {
   events: { fileName: string }[];
@@ -56,8 +52,21 @@ export class CompilerHost
 
   private compilationStarted = false;
 
-  private readonly resolveModuleName: ResolveModuleName;
-  private readonly resolveTypeReferenceDirective: ResolveTypeReferenceDirective;
+  public resolveModuleNames:
+    | ((
+        moduleNames: string[],
+        containingFile: string,
+        reusedNames?: string[] | undefined,
+        redirectedReference?: ts.ResolvedProjectReference | undefined
+      ) => (ts.ResolvedModule | undefined)[])
+    | undefined;
+  public resolveTypeReferenceDirectives:
+    | ((
+        typeReferenceDirectiveNames: string[],
+        containingFile: string,
+        redirectedReference?: ts.ResolvedProjectReference | undefined
+      ) => (ts.ResolvedTypeReferenceDirective | undefined)[])
+    | undefined;
 
   constructor(
     private typescript: typeof ts,
@@ -86,16 +95,39 @@ export class CompilerHost
     this.configFileName = this.tsHost.configFileName;
     this.optionsToExtend = this.tsHost.optionsToExtend || {};
 
-    const {
-      resolveModuleName,
-      resolveTypeReferenceDirective
-    } = makeResolutionFunctions(
-      userResolveModuleName,
-      userResolveTypeReferenceDirective
-    );
+    if (userResolveModuleName) {
+      this.resolveModuleNames = (
+        moduleNames: string[],
+        containingFile: string
+      ) => {
+        return moduleNames.map(moduleName => {
+          return userResolveModuleName(
+            this.typescript,
+            moduleName,
+            containingFile,
+            this.optionsToExtend,
+            this
+          ).resolvedModule;
+        });
+      };
+    }
 
-    this.resolveModuleName = resolveModuleName;
-    this.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
+    if (userResolveTypeReferenceDirective) {
+      this.resolveTypeReferenceDirectives = (
+        typeDirectiveNames: string[],
+        containingFile: string
+      ) => {
+        return typeDirectiveNames.map(typeDirectiveName => {
+          return userResolveTypeReferenceDirective(
+            this.typescript,
+            typeDirectiveName,
+            containingFile,
+            this.optionsToExtend,
+            this
+          ).resolvedTypeReferenceDirective;
+        });
+      };
+    }
   }
 
   public async processChanges(): Promise<{
@@ -367,33 +399,6 @@ export class CompilerHost
     this.afterCompile();
   }
 
-  public resolveModuleNames(moduleNames: string[], containingFile: string) {
-    return moduleNames.map(moduleName => {
-      return this.resolveModuleName(
-        this.typescript,
-        moduleName,
-        containingFile,
-        this.optionsToExtend,
-        this
-      ).resolvedModule;
-    });
-  }
-
-  public resolveTypeReferenceDirectives(
-    typeDirectiveNames: string[],
-    containingFile: string
-  ) {
-    return typeDirectiveNames.map(typeDirectiveName => {
-      return this.resolveTypeReferenceDirective(
-        this.typescript,
-        typeDirectiveName,
-        containingFile,
-        this.optionsToExtend,
-        this
-      ).resolvedTypeReferenceDirective;
-    });
-  }
-
   // the functions below are use internally by typescript. we cannot use non-emitting version of incremental watching API
   // because it is
   // - much slower for some reason,

test/integration/helpers.js

@@ -23,7 +23,8 @@ exports.createVueCompiler = function(options) {
     resolve: {
       extensions: ['.ts', '.js', '.vue', '.json'],
       alias: {
-        '@': path.resolve(__dirname, './vue/src')
+        '@': path.resolve(__dirname, './vue/src'),
+        surprise: './src/index.ts'
       }
     },
     module: {

test/integration/index.spec.js

@@ -35,6 +35,8 @@ function makeCommonTests(useTypescriptIncrementalApi) {
       return compiler.webpack;
     }
 
+    const skipIfIncremental = useTypescriptIncrementalApi ? it.skip : it;
+
     /**
      * Implicitly check whether killService was called by checking that
      * the service property was set to undefined.
@@ -132,6 +134,21 @@ function makeCommonTests(useTypescriptIncrementalApi) {
       });
     });
 
+    skipIfIncremental('should support custom resolution w/ "paths"', function(
+      callback
+    ) {
+      var compiler = createCompiler({
+        tsconfig: 'tsconfig-weird-resolutions-with-paths.json',
+        resolveModuleNameModule: `${__dirname}/project/weirdResolver.js`,
+        resolveTypeReferenceDirectiveModule: `${__dirname}/project/weirdResolver.js`
+      });
+
+      compiler.run(function(err, stats) {
+        expect(stats.compilation.errors.length).to.be.eq(0);
+        callback();
+      });
+    });
+
     it('should fix linting errors with tslintAutofix flag set to true', function(callback) {
       const fileName = 'lintingError1';
       helpers.testLintAutoFixTest(

test/integration/project/src/pathResolutions.ts

@@ -0,0 +1 @@
+import 'surprise';

test/integration/project/tsconfig-weird-resolutions-with-paths.json

@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+      "lib": ["es2016"],
+      "paths": {
+          "surprise": "./index.ts"
+      }
+  },
+  "include": [
+      "src/pathResolutions.ts",
+      "src/weirdResolutions.ts"
+  ]
+}

test/integration/project/tsconfig.json

@@ -3,6 +3,7 @@
       "lib": ["es2016"],
   },
   "exclude": [
+      "src/pathResolutions.ts",
       "src/weirdResolutions.ts"
   ]
 }