feat: support for typescript-eslint-parser-for-extra-files (#241)

* feat: support typescript-eslint-parser-for-extra-files

* Create strange-cheetahs-help.md

* refactor: getInnermostScope

Author: ota-meshi

.changeset/strange-cheetahs-help.md

@@ -0,0 +1,5 @@
+---
+"svelte-eslint-parser": minor
+---
+
+feat: support for `typescript-eslint-parser-for-extra-files`

src/context/index.ts

@@ -20,6 +20,11 @@ import {
 } from "../parser/parser-object";
 import { sortedLastIndex } from "../utils";
 
+const TS_PARSER_NAMES = [
+  "@typescript-eslint/parser",
+  "typescript-eslint-parser-for-extra-files",
+];
+
 export class ScriptsSourceCode {
   private raw: string;
 
@@ -241,18 +246,18 @@ export class Context {
         isTSESLintParserObject(parserValue));
     }
     const parserName = parserValue;
-    if (parserName === "@typescript-eslint/parser") {
+    if (TS_PARSER_NAMES.includes(parserName)) {
       return (this.state.isTypeScript = true);
     }
-    if (parserName.includes("@typescript-eslint/parser")) {
+    if (TS_PARSER_NAMES.some((nm) => parserName.includes(nm))) {
       let targetPath = parserName;
       while (targetPath) {
         const pkgPath = path.join(targetPath, "package.json");
         if (fs.existsSync(pkgPath)) {
           try {
-            return (this.state.isTypeScript =
-              JSON.parse(fs.readFileSync(pkgPath, "utf-8"))?.name ===
-              "@typescript-eslint/parser");
+            return (this.state.isTypeScript = TS_PARSER_NAMES.includes(
+              JSON.parse(fs.readFileSync(pkgPath, "utf-8"))?.name
+            ));
           } catch {
             return (this.state.isTypeScript = false);
           }

src/parser/typescript/restore.ts

@@ -86,10 +86,9 @@ export class RestoreContext {
       (f) => f.start < end && end <= f.end
     );
     if (endFragment) {
+      end = endFragment.start;
       if (startFragment === endFragment) {
-        end = start;
-      } else {
-        end = endFragment.start;
+        start = startFragment.start;
       }
     }
 

src/scope/index.ts

@@ -115,11 +115,17 @@ export function getInnermostScope(
   node: ESTree.Node
 ): Scope {
   const location = node.range![0];
+  const isInRange =
+    node.range![0] === node.range![1]
+      ? (range: [number, number]) =>
+          range[0] <= location && location <= range[1]
+      : (range: [number, number]) =>
+          range[0] <= location && location < range[1];
 
   for (const childScope of initialScope.childScopes) {
     const range = childScope.block.range!;
 
-    if (range[0] <= location && location < range[1]) {
+    if (isInRange(range)) {
       return getInnermostScope(childScope, node);
     }
   }