support import maps

Signed-off-by: 迷渡 <justjavac@gmail.com>

Author: justjavac

package.json

@@ -20,6 +20,7 @@
   },
   "dependencies": {
     "crypto": "^1.0.1",
+    "import-maps": "^0.2.1",
     "merge-deep": "^3.0.2",
     "mock-require": "^3.0.3"
   },

src/index.ts

@@ -1,22 +1,28 @@
 // modified from https://github.com/Microsoft/typescript-tslint-plugin
+import path from 'path'
 import merge from "merge-deep";
 import mockRequire from "mock-require";
 import ts_module, { ResolvedModuleFull, CompilerOptions } from "typescript/lib/tsserverlibrary";
+import { parseFromString, resolve, ImportMaps } from 'import-maps'
 
 import { Logger } from "./logger";
 import {
   getGlobalDtsPath,
   getLocalDtsPath,
   getDtsPathForVscode,
+  normalizeFilepath,
+  pathExistsSync,
 } from "./utils";
 
 import { universalModuleResolver } from "./module_resolver/universal_module_resolver";
+import { readFileSync } from 'fs';
+import { URL } from 'url';
 
 let logger: Logger;
 
 type DenoPluginConfig = {
   enable: boolean;
-  import_map?: string;
+  importmap?: string;
   dtsPath?: string;
 };
 
@@ -79,6 +85,13 @@ module.exports = function init(
       // TypeScript plugins have a `cwd` of `/`, which causes issues with import resolution.
       process.chdir(projectDirectory);
 
+      let parsedImportMap: ImportMaps | null = null;
+
+      if (config.importmap != null) {
+        logger.info('use import maps: ' + config.importmap);
+        parsedImportMap = parseImportMapFromFile(projectDirectory, config.importmap);
+      }
+
       const resolveTypeReferenceDirectives =
         tsLsHost.resolveTypeReferenceDirectives;
 
@@ -89,8 +102,6 @@ module.exports = function init(
           redirectedReference: ts_module.ResolvedProjectReference | undefined,
           options: ts_module.CompilerOptions,
         ): (ts_module.ResolvedTypeReferenceDirective | undefined)[] => {
-          logger.info(`typeDirectiveNames: ${typeDirectiveNames}`);
-          logger.info(`containingFile: ${containingFile}`);
           const ret = resolveTypeReferenceDirectives.call(
             tsLsHost,
             typeDirectiveNames,
@@ -99,8 +110,6 @@ module.exports = function init(
             options,
           );
 
-          logger.info(JSON.stringify(ret, null, "  "));
-
           return ret;
         };
       }
@@ -116,7 +125,17 @@ module.exports = function init(
           const resolvedModules: (ResolvedModuleFull | undefined)[] = [];
 
           // try resolve typeReferenceDirectives
-          for (const moduleName of moduleNames) {
+          for (let moduleName of moduleNames) {
+            if (parsedImportMap !== null) {
+              try{
+                const moduleUrl = resolve(moduleName, parsedImportMap, new URL(projectDirectory, 'file:///'))
+                moduleName = moduleUrl.protocol === 'file:' ? moduleUrl.pathname : moduleUrl.href;
+              } catch (e){
+                resolvedModules.push(undefined);
+                continue;
+              }
+            }
+
             const resolvedModule = universalModuleResolver.resolve(
               moduleName,
               containingFile,
@@ -186,8 +205,6 @@ module.exports = function init(
           info.languageServiceHost,
         );
 
-        logger.info(`getScriptFileNames:${JSON.stringify(scriptFileNames)}`);
-
         const denoDtsPath = getDtsPathForVscode(info) ||
           getGlobalDtsPath() ||
           getLocalDtsPath(info.languageServiceHost);
@@ -294,3 +311,25 @@ module.exports = function init(
     },
   };
 };
+
+function parseImportMapFromFile(cwd: string, file: string): ImportMaps | null {
+  if (!path.isAbsolute(file)) {
+    file = path.resolve(cwd, file)
+  }
+
+  const fullFilePath = normalizeFilepath(file)
+
+  if (!pathExistsSync(fullFilePath)) {
+    return null;
+  }
+
+  const content = readFileSync(fullFilePath, {
+    encoding: "utf8",
+  });
+
+  try {
+    return parseFromString(content, `file://${cwd}/`);
+  } catch {
+    return null;
+  }
+}

tsconfig.json

@@ -6,7 +6,7 @@
     "outDir": "out",
     "noImplicitAny": true,
     "noUnusedParameters": true,
-    "noUnusedLocals": true,
+    // "noUnusedLocals": true,
     "esModuleInterop": true,
     "allowSyntheticDefaultImports": true,
     "lib": ["es6"],

yarn.lock

@@ -57,6 +57,11 @@ get-caller-file@^1.0.2:
   resolved "https://registry.npm.taobao.org/get-caller-file/download/get-caller-file-1.0.3.tgz#f978fa4c90d1dfe7ff2d6beda2a515e713bdcf4a"
   integrity sha1-+Xj6TJDR3+f/LWvtoqUV5xO9z0o=
 
+import-maps@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.npm.taobao.org/import-maps/download/import-maps-0.2.1.tgz?cache=0&sync_timestamp=1588752776277&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fimport-maps%2Fdownload%2Fimport-maps-0.2.1.tgz#ca641bf85c21077a186df1461008b8dc8867fedb"
+  integrity sha1-ymQb+FwhB3oYbfFGEAi43Ihn/ts=
+
 is-buffer@^1.0.2, is-buffer@^1.1.5:
   version "1.1.6"
   resolved "https://registry.npm.taobao.org/is-buffer/download/is-buffer-1.1.6.tgz?cache=0&sync_timestamp=1588707106955&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fis-buffer%2Fdownload%2Fis-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"