Support for symlinks in project references

.gitignore

@@ -1,6 +1,7 @@
 /*.js
 !index.js
 /src/*.js
+/src/.vscode
 /*.d.ts
 /*.log
 *.js.map
@@ -10,11 +11,13 @@ npm-debug.log
 /test/execution-tests/**/typings
 !/test/**/expectedOutput-*/**
 /**/node_modules
-/**/dist
+/dist
+/test/execution-tests/**/dist
 /**/.happypack
 /**/.cache-loader
 !build.js
 /**/debug.log
 .pnp
 .pnp.js
-!.eslintrc.js
+!.eslintrc.js
+.vs/**

.travis.yml

@@ -18,16 +18,4 @@ env:
   - TYPESCRIPT=typescript@3.8.2
   - TYPESCRIPT=typescript@3.7.4
   - TYPESCRIPT=typescript@3.6.3
-  - TYPESCRIPT=typescript@3.5.1
-  - TYPESCRIPT=typescript@3.4.4
-  - TYPESCRIPT=typescript@3.3.3
-  - TYPESCRIPT=typescript@3.2.1
-  - TYPESCRIPT=typescript@3.1.1
-  - TYPESCRIPT=typescript@3.0.1
-  - TYPESCRIPT=typescript@2.9.2
-  - TYPESCRIPT=typescript@2.8.1
-  - TYPESCRIPT=typescript@2.7.1
-  - TYPESCRIPT=typescript@2.6.1
-  - TYPESCRIPT=typescript@2.5.2
-  - TYPESCRIPT=typescript@2.4.1
 

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## v8.0.0
+* [Support for symlinks in project references](https://github.com/TypeStrong/ts-loader/pull/1136) - thanks @sheetalkamat!
+* `ts-loader` now supports TypeScript 3.6 and greater **BREAKING CHANGE**
+
 ## v7.0.5
 * [Add a delay before starting the comparison tests to avoid failures under WSL](https://github.com/TypeStrong/ts-loader/pull/1109) - thanks @appzuka
 * [Apply other loaders when updating files in watch mode](https://github.com/TypeStrong/ts-loader/pull/1115) - thanks @iorate

appveyor.yml

@@ -8,18 +8,7 @@ environment:
   - TYPESCRIPT: typescript@3.8.2
   - TYPESCRIPT: typescript@3.7.4
   - TYPESCRIPT: typescript@3.6.3
-  - TYPESCRIPT: typescript@3.5.1
-  - TYPESCRIPT: typescript@3.4.4
-  - TYPESCRIPT: typescript@3.3.3
-  - TYPESCRIPT: typescript@3.2.1
-  - TYPESCRIPT: typescript@3.1.1
-  - TYPESCRIPT: typescript@3.0.1
-  - TYPESCRIPT: typescript@2.9.2
-  - TYPESCRIPT: typescript@2.8.1
-  - TYPESCRIPT: typescript@2.7.1
-  - TYPESCRIPT: typescript@2.6.1
-  - TYPESCRIPT: typescript@2.5.2
-  - TYPESCRIPT: typescript@2.4.1
+
 install:
   - ps: Install-Product node $env:nodejs_version
   - yarn install

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ts-loader",
-  "version": "7.0.5",
+  "version": "8.0.0",
   "description": "TypeScript loader for webpack",
   "main": "index.js",
   "types": "dist",

src/after-compile.ts

@@ -3,23 +3,21 @@ import * as ts from 'typescript';
 import * as webpack from 'webpack';
 
 import * as constants from './constants';
+import { getEmitFromWatchHost, getEmitOutput } from './instances';
 import {
-  getEmitFromWatchHost,
-  getEmitOutput,
-  isReferencedFile,
-} from './instances';
-import {
-  TSFile,
+  FilePathKey,
   TSFiles,
   TSInstance,
   WebpackError,
   WebpackModule,
+  TSFile,
 } from './interfaces';
 import {
   collectAllDependants,
   ensureProgram,
   formatErrors,
-  isUsingProjectReferences,
+  isReferencedFile,
+  populateReverseDependencyGraph,
 } from './utils';
 
 export function makeAfterCompile(
@@ -55,15 +53,15 @@ export function makeAfterCompile(
     );
     getCompilerOptionDiagnostics = false;
 
-    const modules = determineModules(compilation);
+    const modules = determineModules(compilation, instance);
 
     const filesToCheckForErrors = determineFilesToCheckForErrors(
       checkAllFilesForErrors,
       instance
     );
     checkAllFilesForErrors = false;
 
-    const filesWithErrors: TSFiles = new Map<string, TSFile>();
+    const filesWithErrors: TSFiles = new Map();
     provideErrorsToWebpack(
       filesToCheckForErrors,
       filesWithErrors,
@@ -119,11 +117,14 @@ function provideCompilerOptionDiagnosticErrorsToWebpack(
  * this is used for quick-lookup when trying to find modules
  * based on filepath
  */
-function determineModules(compilation: webpack.compilation.Compilation) {
-  return compilation.modules.reduce<Map<string, WebpackModule[]>>(
+function determineModules(
+  compilation: webpack.compilation.Compilation,
+  { filePathKeyMapper }: TSInstance
+) {
+  return compilation.modules.reduce<Map<FilePathKey, WebpackModule[]>>(
     (modules, module) => {
       if (module.resource) {
-        const modulePath = path.normalize(module.resource);
+        const modulePath = filePathKeyMapper(module.resource);
         const existingModules = modules.get(modulePath);
         if (existingModules !== undefined) {
           if (existingModules.indexOf(module) === -1) {
@@ -136,7 +137,7 @@ function determineModules(compilation: webpack.compilation.Compilation) {
 
       return modules;
     },
-    new Map<string, WebpackModule[]>()
+    new Map()
   );
 }
 
@@ -146,43 +147,54 @@ function determineFilesToCheckForErrors(
 ) {
   const { files, modifiedFiles, filesWithErrors, otherFiles } = instance;
   // calculate array of files to check
-  const filesToCheckForErrors: TSFiles = new Map<string, TSFile>();
+  const filesToCheckForErrors: TSFiles = new Map();
   if (checkAllFilesForErrors) {
     // check all files on initial run
     for (const [filePath, file] of files) {
-      filesToCheckForErrors.set(filePath, file);
+      addFileToCheckForErrors(filePath, file);
     }
     for (const [filePath, file] of otherFiles) {
-      filesToCheckForErrors.set(filePath, file);
+      addFileToCheckForErrors(filePath, file);
     }
-  } else if (modifiedFiles !== null && modifiedFiles !== undefined) {
+  } else if (
+    modifiedFiles !== null &&
+    modifiedFiles !== undefined &&
+    modifiedFiles.size
+  ) {
+    const reverseDependencyGraph = populateReverseDependencyGraph(instance);
     // check all modified files, and all dependants
     for (const modifiedFileName of modifiedFiles.keys()) {
-      collectAllDependants(
-        instance.reverseDependencyGraph,
+      for (const fileName of collectAllDependants(
+        reverseDependencyGraph,
         modifiedFileName
-      ).forEach(fileName => {
+      ).keys()) {
         const fileToCheckForErrors =
           files.get(fileName) || otherFiles.get(fileName);
-        filesToCheckForErrors.set(fileName, fileToCheckForErrors!);
-      });
+        addFileToCheckForErrors(fileName, fileToCheckForErrors!);
+      }
     }
   }
 
   // re-check files with errors from previous build
   if (filesWithErrors !== undefined) {
     for (const [fileWithErrorName, fileWithErrors] of filesWithErrors) {
-      filesToCheckForErrors.set(fileWithErrorName, fileWithErrors);
+      addFileToCheckForErrors(fileWithErrorName, fileWithErrors);
     }
   }
   return filesToCheckForErrors;
+
+  function addFileToCheckForErrors(filePath: FilePathKey, file: TSFile) {
+    if (!isReferencedFile(instance, filePath)) {
+      filesToCheckForErrors.set(filePath, file);
+    }
+  }
 }
 
 function provideErrorsToWebpack(
   filesToCheckForErrors: TSFiles,
   filesWithErrors: TSFiles,
   compilation: webpack.compilation.Compilation,
-  modules: Map<string, WebpackModule[]>,
+  modules: Map<FilePathKey, WebpackModule[]>,
   instance: TSInstance
 ) {
   const {
@@ -200,20 +212,12 @@ function provideErrorsToWebpack(
 
   // I’m pretty sure this will never be undefined here
   const program = ensureProgram(instance);
-  for (const filePath of filesToCheckForErrors.keys()) {
-    if (filePath.match(filePathRegex) === null) {
-      continue;
-    }
-
-    const sourceFile = program && program.getSourceFile(filePath);
-    // If the source file is undefined, that probably means it’s actually part of an unbuilt project reference,
-    // which will have already produced a more useful error than the one we would get by proceeding here.
-    // If it’s undefined and we’re not using project references at all, I guess carry on so the user will
-    // get a useful error about which file was unexpectedly missing.
-    if (isUsingProjectReferences(instance) && sourceFile === undefined) {
+  for (const [filePath, { fileName }] of filesToCheckForErrors.entries()) {
+    if (fileName.match(filePathRegex) === null) {
       continue;
     }
 
+    const sourceFile = program && program.getSourceFile(fileName);
     const errors: ts.Diagnostic[] = [];
     if (program && sourceFile) {
       errors.push(
@@ -231,7 +235,7 @@ function provideErrorsToWebpack(
     }
 
     // if we have access to a webpack module, use that
-    const associatedModules = modules.get(filePath);
+    const associatedModules = modules.get(instance.filePathKeyMapper(fileName));
     if (associatedModules !== undefined) {
       associatedModules.forEach(module => {
         // remove any existing errors
@@ -257,7 +261,7 @@ function provideErrorsToWebpack(
         loaderOptions,
         instance.colors,
         compiler,
-        { file: filePath },
+        { file: fileName },
         compilation.compiler.context
       );
 
@@ -268,7 +272,7 @@ function provideErrorsToWebpack(
 
 function provideSolutionErrorsToWebpack(
   compilation: webpack.compilation.Compilation,
-  modules: Map<string, WebpackModule[]>,
+  modules: Map<FilePathKey, WebpackModule[]>,
   instance: TSInstance
 ) {
   if (
@@ -315,7 +319,7 @@ function provideSolutionErrorsToWebpack(
         loaderOptions,
         instance.colors,
         compiler,
-        { file: filePath },
+        { file: path.resolve(perFileDiagnostics[0].file!.fileName) },
         compilation.compiler.context
       );
 
@@ -344,17 +348,12 @@ function provideDeclarationFilesToWebpack(
   instance: TSInstance,
   compilation: webpack.compilation.Compilation
 ) {
-  for (const filePath of filesToCheckForErrors.keys()) {
-    if (filePath.match(constants.tsTsxRegex) === null) {
+  for (const { fileName } of filesToCheckForErrors.values()) {
+    if (fileName.match(constants.tsTsxRegex) === null) {
       continue;
     }
 
-    if (!isReferencedFile(instance, filePath)) {
-      addDeclarationFilesAsAsset(
-        getEmitOutput(instance, filePath),
-        compilation
-      );
-    }
+    addDeclarationFilesAsAsset(getEmitOutput(instance, fileName), compilation);
   }
 }
 

src/compilerSetup.ts

@@ -27,7 +27,7 @@ export function getCompiler(loaderOptions: LoaderOptions, log: logger.Logger) {
     if (loaderOptions.compiler === 'typescript') {
       if (
         compiler!.version !== undefined &&
-        semver.gte(compiler!.version, '2.4.1')
+        semver.gte(compiler!.version, '3.6.3')
       ) {
         // don't log yet in this case, if a tsconfig.json exists we want to combine the message
         compilerCompatible = true;