Add glint-language-server to @glint/core

packages/config/__tests__/include-exclude.test.ts

@@ -12,11 +12,16 @@ describe('include/exclude configuration', () => {
       expect(config.includesFile(`${root}/deeply/nested/file.ts`)).toBe(true);
     });
 
+    test('includes all .hbs files within the root', () => {
+      expect(config.includesFile(`${root}/file.hbs`)).toBe(true);
+      expect(config.includesFile(`${root}/deeply/nested/file.hbs`)).toBe(true);
+    });
+
     test('excludes files outside the root', () => {
       expect(config.includesFile(`${root}/../other.ts`)).toBe(false);
     });
 
-    test('excludes non-.ts files', () => {
+    test('excludes non-.ts/.hbs files', () => {
       expect(config.includesFile(`${root}/other.txt`)).toBe(false);
     });
 

packages/config/src/config.ts

@@ -25,7 +25,12 @@ export class GlintConfig {
     this.rootDir = normalizePath(rootDir);
     this.environment = GlintEnvironment.load(config.environment, { rootDir });
 
-    let include = Array.isArray(config.include) ? config.include : [config.include ?? '**/*.ts'];
+    let include = Array.isArray(config.include)
+      ? config.include
+      : config.include
+      ? [config.include]
+      : ['**/*.ts', '**/*.hbs'];
+
     let exclude = Array.isArray(config.exclude)
       ? config.exclude
       : [config.exclude ?? '**/node_modules/**'];

packages/core/__tests__/cli/check.test.ts

@@ -2,9 +2,10 @@ import { stripIndent } from 'common-tags';
 import stripAnsi from 'strip-ansi';
 import Project from '../utils/project';
 
-describe('single-pass typechecking', () => {
+describe('CLI: single-pass typechecking', () => {
   let project!: Project;
   beforeEach(async () => {
+    jest.setTimeout(20_000);
     project = await Project.create();
   });
 
@@ -64,13 +65,13 @@ describe('single-pass typechecking', () => {
     expect(checkResult.exitCode).toBe(1);
     expect(checkResult.stdout).toEqual('');
     expect(stripAnsi(checkResult.stderr)).toMatchInlineSnapshot(`
-      "index.ts:10:28 - error TS0: [glint] Parse error on line 2:
+      "index.ts:11:24 - error TS0: Parse error on line 2:
       ...e to app v{{@version}.    The current t
       -----------------------^
       Expecting 'CLOSE_RAW_BLOCK', 'CLOSE', 'CLOSE_UNESCAPED', 'OPEN_SEXPR', 'CLOSE_SEXPR', 'ID', 'OPEN_BLOCK_PARAMS', 'STRING', 'NUMBER', 'BOOLEAN', 'UNDEFINED', 'NULL', 'DATA', 'SEP', got 'INVALID'
 
-      10   public static template = hbs\`
-                                    ~~~
+      11     Welcome to app v{{@version}.
+                                ~~~~~~~
       "
     `);
   });

packages/core/__tests__/cli/declaration.test.ts

@@ -1,7 +1,7 @@
 import { stripIndent } from 'common-tags';
 import Project from '../utils/project';
 
-describe('emitting declarations', () => {
+describe('CLI: emitting declarations', () => {
   let project!: Project;
   beforeEach(async () => {
     project = await Project.create();

packages/core/__tests__/cli/watch.test.ts

@@ -3,7 +3,7 @@ import stripAnsi from 'strip-ansi';
 import os from 'os';
 import Project from '../utils/project';
 
-describe('watched typechecking', () => {
+describe('CLI: watched typechecking', () => {
   let project!: Project;
   beforeEach(async () => {
     jest.setTimeout(20_000);
@@ -75,13 +75,13 @@ describe('watched typechecking', () => {
 
     expect(output).toMatch('Found 1 error.');
     expect(error.replace(/\r/g, '')).toMatchInlineSnapshot(`
-      "index.ts:10:28 - error TS0: [glint] Parse error on line 2:
+      "index.ts:11:24 - error TS0: Parse error on line 2:
       ...e to app v{{@version}.    The current t
       -----------------------^
       Expecting 'CLOSE_RAW_BLOCK', 'CLOSE', 'CLOSE_UNESCAPED', 'OPEN_SEXPR', 'CLOSE_SEXPR', 'ID', 'OPEN_BLOCK_PARAMS', 'STRING', 'NUMBER', 'BOOLEAN', 'UNDEFINED', 'NULL', 'DATA', 'SEP', got 'INVALID'
 
-      10   public static template = hbs\`
-                                    ~~~"
+      11     Welcome to app v{{@version}.
+                                ~~~~~~~"
     `);
   });
 

packages/core/bin/glint-language-server.js

@@ -0,0 +1,3 @@
+#!/usr/bin/env node
+/* eslint-disable */
+require('../lib/language-server');

packages/core/package.json

@@ -11,7 +11,8 @@
     "bin"
   ],
   "bin": {
-    "glint": "bin/glint.js"
+    "glint": "bin/glint.js",
+    "glint-language-server": "bin/glint-language-server.js"
   },
   "scripts": {
     "lint": "eslint . --max-warnings 0 && prettier --check src",
@@ -23,6 +24,9 @@
     "@glint/config": "^0.2.1",
     "@glint/transform": "^0.2.1",
     "resolve": "^1.17.0",
+    "vscode-languageserver": "^7.0.0",
+    "vscode-languageserver-textdocument": "^1.0.1",
+    "vscode-uri": "^3.0.2",
     "yargs": "^15.3.1"
   },
   "devDependencies": {

packages/core/src/cli/index.ts

@@ -3,7 +3,7 @@ import { loadConfig } from '@glint/config';
 import { performWatch } from './perform-watch';
 import { performCheck } from './perform-check';
 import { determineOptionsToExtend } from './options';
-import { loadTypeScript } from './load-typescript';
+import { loadTypeScript } from '../common/load-typescript';
 
 const { argv } = yargs
   .scriptName('glint')

packages/core/src/cli/perform-check.ts

@@ -1,5 +1,5 @@
 import type ts from 'typescript';
-import TransformManager from './transform-manager';
+import TransformManager from '../common/transform-manager';
 import { GlintConfig } from '@glint/config';
 
 export function performCheck(
@@ -46,7 +46,7 @@ function createCompilerHost(
   transformManager: TransformManager
 ): ts.CompilerHost {
   let host = ts.createCompilerHost(options);
-  host.readFile = transformManager.readFile;
+  host.readFile = transformManager.readTransformedFile;
   return host;
 }
 

packages/core/src/cli/perform-watch.ts

@@ -1,4 +1,4 @@
-import TransformManager from './transform-manager';
+import TransformManager from '../common/transform-manager';
 import { GlintConfig } from '@glint/config';
 
 export function performWatch(
@@ -27,8 +27,8 @@ function sysForWatchCompilerHost(
 ): typeof ts.sys {
   return {
     ...ts.sys,
-    watchFile: transformManager.watchFile,
-    readFile: transformManager.readFile,
+    watchFile: transformManager.watchTransformedFile,
+    readFile: transformManager.readTransformedFile,
   };
 }
 
@@ -47,7 +47,7 @@ function patchProgram(program: Program, transformManager: TransformManager): voi
   let { getSyntacticDiagnostics } = program;
   program.getSyntacticDiagnostics = function (sourceFile, cancelationToken) {
     let diagnostics = getSyntacticDiagnostics.call(program, sourceFile, cancelationToken);
-    let transformDiagnostics = transformManager.getTransformDiagnostics(sourceFile);
+    let transformDiagnostics = transformManager.getTransformDiagnostics(sourceFile?.fileName);
     return [...diagnostics, ...transformDiagnostics];
   };
 }

packages/core/src/common/document-cache.ts

@@ -0,0 +1,113 @@
+import { GlintConfig } from '@glint/config';
+
+export type Document = {
+  version: number;
+  contents: string;
+  stale: boolean;
+};
+
+/**
+ * A read-through cache for workspace document contents.
+ *
+ * This cache is aware (via the glint configuration it's instantiated with)
+ * of the relationship between certain `.ts` and `.hbs` files, and will
+ * treat a change to one member of such pairs as affecting the version
+ * of both.
+ */
+export default class DocumentCache {
+  private readonly documents = new Map<string, Document>();
+
+  public constructor(private ts: typeof import('typescript'), private glintConfig: GlintConfig) {}
+
+  public documentExists(path: string): boolean {
+    return this.documents.has(path) || this.ts.sys.fileExists(path);
+  }
+
+  public getCompanionDocumentPath(path: string): string | undefined {
+    let { environment } = this.glintConfig;
+    let candidates = isTemplate(path)
+      ? environment.getPossibleScriptPaths(path)
+      : environment.getPossibleTemplatePaths(path);
+
+    for (let candidate of candidates) {
+      if (this.documentExists(candidate)) {
+        return candidate;
+      }
+    }
+  }
+
+  public getDocumentContents(path: string, encoding?: string): string {
+    if (!this.documentExists(path)) return '';
+
+    let document = this.getDocument(path);
+    if (document.stale) {
+      document.contents = this.ts.sys.readFile(path, encoding) ?? '';
+      document.stale = false;
+    }
+
+    return document.contents;
+  }
+
+  public getCompoundDocumentVersion(path: string): string {
+    let template = isTemplate(path) ? this.getDocument(path) : this.findCompanionDocument(path);
+    let script = isTemplate(path) ? this.findCompanionDocument(path) : this.getDocument(path);
+
+    return `${script?.version}:${template?.version}`;
+  }
+
+  public getDocumentVersion(path: string): string {
+    return this.getDocument(path).version.toString();
+  }
+
+  public updateDocument(path: string, contents: string): void {
+    let document = this.getDocument(path);
+
+    document.stale = false;
+    document.contents = contents;
+    document.version++;
+
+    this.incrementCompanionVersion(path);
+  }
+
+  public markDocumentStale(path: string): void {
+    let document = this.getDocument(path);
+
+    document.stale = true;
+    document.version++;
+
+    this.incrementCompanionVersion(path);
+  }
+
+  public removeDocument(path: string): void {
+    this.documents.delete(path);
+  }
+
+  private incrementCompanionVersion(path: string): void {
+    let companion = this.findCompanionDocument(path);
+    if (companion) {
+      companion.version++;
+    }
+  }
+
+  private findCompanionDocument(path: string): Document | undefined {
+    let companionPath = this.getCompanionDocumentPath(path);
+    return companionPath ? this.getDocument(companionPath) : undefined;
+  }
+
+  private getDocument(path: string): Document {
+    let document = this.documents.get(path);
+    if (!document) {
+      document = { version: 0, contents: '', stale: true };
+      this.documents.set(path, document);
+    }
+    return document;
+  }
+}
+
+export function isTemplate(path: string): boolean {
+  return path.endsWith('.hbs');
+}
+
+export function isScript(path: string): boolean {
+  return path.endsWith('.ts');
+}