From 321b728e9947746201b05e1ee5c4186d7156fe4d Mon Sep 17 00:00:00 2001
From: Knut Wannheden <knut@moderne.io>
Date: Mon, 23 Sep 2024 23:18:47 +0200
Subject: [PATCH] Add Parser.Builder

---
 openrewrite/src/core/parser.ts       |  4 ++--
 openrewrite/src/javascript/parser.ts | 13 +++++++++++++
 openrewrite/test/core/tree.test.ts   |  4 ++--
 3 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/openrewrite/src/core/parser.ts b/openrewrite/src/core/parser.ts
index 599dbdc..ad0cce3 100644
--- a/openrewrite/src/core/parser.ts
+++ b/openrewrite/src/core/parser.ts
@@ -109,7 +109,7 @@ export abstract class Parser {
 }
 
 export namespace Parser {
-    abstract class Builder {
+    export abstract class Builder {
         protected _sourceFileType: any;
 
         get sourceFileType(): any {
@@ -120,7 +120,7 @@ export namespace Parser {
     }
 }
 
-function requirePrintEqualsInput(
+export function requirePrintEqualsInput(
     parser: Parser,
     sourceFile: SourceFile,
     parserInput: ParserInput,
diff --git a/openrewrite/src/javascript/parser.ts b/openrewrite/src/javascript/parser.ts
index 46ac707..a4142bd 100644
--- a/openrewrite/src/javascript/parser.ts
+++ b/openrewrite/src/javascript/parser.ts
@@ -6,6 +6,7 @@ import {Expression, JRightPadded, Space, Statement} from "../java/tree";
 import {Node} from "typescript";
 
 export class JavaScriptParser extends Parser {
+
     parseInputs(inputs: Iterable<ParserInput>, relativeTo: string | null, ctx: ExecutionContext): Iterable<SourceFile> {
         const inputsArray = Array.from(inputs);
         const compilerOptions: ts.CompilerOptions = {
@@ -69,6 +70,18 @@ export class JavaScriptParser extends Parser {
     sourcePathFromSourceText(prefix: string, sourceCode: string): string {
         return prefix + "/source.js";
     }
+
+    static builder(): JavaScriptParser.Builder {
+        return new JavaScriptParser.Builder();
+    }
+}
+
+export namespace JavaScriptParser {
+    export class Builder extends Parser.Builder {
+        build(): JavaScriptParser {
+            return new JavaScriptParser();
+        }
+    }
 }
 
 class ParserVisitor {
diff --git a/openrewrite/test/core/tree.test.ts b/openrewrite/test/core/tree.test.ts
index b663b96..e167edb 100644
--- a/openrewrite/test/core/tree.test.ts
+++ b/openrewrite/test/core/tree.test.ts
@@ -19,13 +19,13 @@ describe('tree utils', () => {
     });
 
     test('parse', () => {
-        const parser = new JavaScriptParser();
+        const parser = JavaScriptParser.builder().build();
         const [sourceFile] = parser.parseInputs([new ParserInput('foo.ts', null, true, () => Buffer.from('1', 'utf8'))], null, new InMemoryExecutionContext());
         console.log(sourceFile);
     });
 
     test('parse strings', () => {
-        const parser = new JavaScriptParser();
+        const parser = JavaScriptParser.builder().build();
         const [sourceFile] = parser.parseStrings('const c = 1;');
         console.log(sourceFile);
     });