feat(editor): support oxc.fmt.configPath configuration

editors/vscode/README.md

@@ -66,6 +66,7 @@ Following configuration are supported via `settings.json` and can be changed for
 | `oxc.typeAware`               | `false`       | `false` \| `true`           | Enable type aware linting.                                                                                                                       |
 | `oxc.flags`                   | -             | `Record<string, string>`    | Custom flags passed to the language server.                                                                                                      |
 | `oxc.fmt.experimental`        | `false`       | `false` \| `true`           | Enable experimental formatting support. This feature is experimental and might not work as expected.                                             |
+| `oxc.fmt.configPath`          | `null`        | `<string>` \| `null`        | Path to an oxfmt configuration file. When `null`, the server will use `.oxfmtrc.json` at the workspace root.                                     |
 
 #### Flags
 

editors/vscode/client/WorkspaceConfig.ts

@@ -69,6 +69,12 @@ export interface WorkspaceConfigInterface {
    * @default false
    */
   ['fmt.experimental']: boolean;
+
+  /**
+   * Path to an oxfmt configuration file
+   * `oxc.fmt.configPath`
+   */
+  ['fmt.configPath']?: string | null;
 }
 
 export class WorkspaceConfig {
@@ -79,6 +85,7 @@ export class WorkspaceConfig {
   private _typeAware: boolean = false;
   private _flags: Record<string, string> = {};
   private _formattingExperimental: boolean = false;
+  private _formattingConfigPath: string | null = null;
 
   constructor(private readonly workspace: WorkspaceFolder) {
     this.refresh();
@@ -101,6 +108,7 @@ export class WorkspaceConfig {
     this._typeAware = this.configuration.get<boolean>('typeAware') ?? false;
     this._flags = flags;
     this._formattingExperimental = this.configuration.get<boolean>('fmt.experimental') ?? false;
+    this._formattingConfigPath = this.configuration.get<string | null>('fmt.configPath') ?? null;
   }
 
   public effectsConfigChange(event: ConfigurationChangeEvent): boolean {
@@ -125,6 +133,9 @@ export class WorkspaceConfig {
     if (event.affectsConfiguration(`${ConfigService.namespace}.fmt.experimental`, this.workspace)) {
       return true;
     }
+    if (event.affectsConfiguration(`${ConfigService.namespace}.fmt.configPath`, this.workspace)) {
+      return true;
+    }
     return false;
   }
 
@@ -195,6 +206,15 @@ export class WorkspaceConfig {
     return this.configuration.update('fmt.experimental', value, ConfigurationTarget.WorkspaceFolder);
   }
 
+  get formattingConfigPath(): string | null {
+    return this._formattingConfigPath;
+  }
+
+  updateFormattingConfigPath(value: string | null): PromiseLike<void> {
+    this._formattingConfigPath = value;
+    return this.configuration.update('fmt.configPath', value, ConfigurationTarget.WorkspaceFolder);
+  }
+
   public toLanguageServerConfig(): WorkspaceConfigInterface {
     return {
       run: this.runTrigger,
@@ -204,6 +224,7 @@ export class WorkspaceConfig {
       typeAware: this.typeAware,
       flags: this.flags,
       ['fmt.experimental']: this.formattingExperimental,
+      ['fmt.configPath']: this.formattingConfigPath ?? null,
     };
   }
 }

editors/vscode/fixtures/formatting_with_config/formatter.json

@@ -0,0 +1,3 @@
+{
+  "semi": false
+}

editors/vscode/fixtures/formatting_with_config/formatting.ts

@@ -0,0 +1 @@
+class X { foo() { return 42; } }

editors/vscode/package.json

@@ -158,6 +158,15 @@
           "scope": "resource",
           "default": false,
           "description": "Enable experimental formatting support. This feature is experimental and might not work as expected."
+        },
+        "oxc.fmt.configPath": {
+          "type": [
+            "string",
+            "null"
+          ],
+          "scope": "resource",
+          "default": null,
+          "description": "Path to an oxfmt configuration file"
         }
       }
     },

editors/vscode/tests/WorkspaceConfig.spec.ts

@@ -3,7 +3,7 @@ import { ConfigurationTarget, workspace } from 'vscode';
 import { WorkspaceConfig } from '../client/WorkspaceConfig.js';
 import { WORKSPACE_FOLDER } from './test-helpers.js';
 
-const keys = ['lint.run', 'configPath', 'tsConfigPath', 'flags', 'unusedDisableDirectives', 'typeAware', 'fmt.experimental'];
+const keys = ['lint.run', 'configPath', 'tsConfigPath', 'flags', 'unusedDisableDirectives', 'typeAware', 'fmt.experimental', 'fmt.configPath'];
 
 suite('WorkspaceConfig', () => {
   setup(async () => {
@@ -36,6 +36,7 @@ suite('WorkspaceConfig', () => {
     strictEqual(config.typeAware, false);
     deepStrictEqual(config.flags, {});
     strictEqual(config.formattingExperimental, false);
+    strictEqual(config.formattingConfigPath, null);
   });
 
   test('configPath defaults to null when using nested configs and configPath is empty', async () => {
@@ -71,6 +72,7 @@ suite('WorkspaceConfig', () => {
       config.updateTypeAware(true),
       config.updateFlags({ test: 'value' }),
       config.updateFormattingExperimental(true),
+      config.updateFormattingConfigPath('./oxfmt.json'),
     ]);
 
     const wsConfig = workspace.getConfiguration('oxc', WORKSPACE_FOLDER);
@@ -82,5 +84,6 @@ suite('WorkspaceConfig', () => {
     strictEqual(wsConfig.get('typeAware'), true);
     deepStrictEqual(wsConfig.get('flags'), { test: 'value' });
     strictEqual(wsConfig.get('fmt.experimental'), true);
+    strictEqual(wsConfig.get('fmt.configPath'), './oxfmt.json');
   });
 });

editors/vscode/tests/e2e_server.spec.ts

@@ -36,6 +36,7 @@ teardown(async () => {
   await workspace.getConfiguration('oxc').update('tsConfigPath', undefined);
   await workspace.getConfiguration('oxc').update('typeAware', undefined);
   await workspace.getConfiguration('oxc').update('fmt.experimental', undefined);
+  await workspace.getConfiguration('oxc').update('fmt.configPath', undefined);
   await workspace.getConfiguration('editor').update('defaultFormatter', undefined);
   await workspace.saveAll();
 });
@@ -288,4 +289,23 @@ suite('E2E Diagnostics', () => {
 
     strictEqual(content.toString(), "class X {\n  foo() {\n    return 42;\n  }\n}\n");
   });
+
+  test('formats code with `oxc.fmt.configPath`', async () => {
+    await loadFixture('formatting_with_config');
+
+    await workspace.getConfiguration('oxc').update('fmt.experimental', true);
+    await workspace.getConfiguration('oxc').update('fmt.configPath', './fixtures/formatter.json');
+    await workspace.getConfiguration('editor').update('defaultFormatter', 'oxc.oxc-vscode');
+
+    await sleep(500); // wait for the server to pick up the new config
+    const fileUri = Uri.joinPath(fixturesWorkspaceUri(), 'fixtures', 'formatting.ts');
+
+    const document = await workspace.openTextDocument(fileUri);
+    await window.showTextDocument(document);
+    await commands.executeCommand('editor.action.formatDocument');
+    await workspace.saveAll();
+    const content = await workspace.fs.readFile(fileUri);
+
+    strictEqual(content.toString(), "class X {\n  foo() {\n    return 42\n  }\n}\n");
+  });
 });