fix(deps): externalize tree-sitter (google-gemini#840)

Submitting without approval to fix broken deployment on main. But also, we should lock this down.

Author: mattKorwel

esbuild.config.js

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import esbuild from 'esbuild';
+
+esbuild
+  .build({
+    entryPoints: ['packages/cli/index.ts'],
+    bundle: true,
+    outfile: 'bundle/gemini.js',
+    platform: 'node',
+    format: 'esm',
+    banner: {
+      js: `import { createRequire } from 'module'; const require = createRequire(import.meta.url); globalThis.__filename = require('url').fileURLToPath(import.meta.url); globalThis.__dirname = require('path').dirname(globalThis.__filename);`,
+    },
+    external: [
+      'tree-sitter',
+      'tree-sitter-c-sharp',
+      'tree-sitter-go',
+      'tree-sitter-java',
+      'tree-sitter-python',
+      'tree-sitter-rust',
+      'tree-sitter-typescript',
+    ],
+  })
+  .catch(() => process.exit(1));

eslint.config.js

@@ -155,7 +155,7 @@ export default tseslint.config(
   },
   // extra settings for scripts that we run directly with node
   {
-    files: ['./scripts/**/*.js'],
+    files: ['./scripts/**/*.js', 'esbuild.config.js'],
     languageOptions: {
       globals: {
         process: 'readonly',

package-lock.json

@@ -25,7 +25,7 @@
     "auth:docker": "gcloud auth configure-docker us-west1-docker.pkg.dev",
     "auth": "npm run auth:npm && npm run auth:docker",
     "prerelease:dev": "npm run prerelease:version --workspaces && npm run prerelease:deps --workspaces",
-    "bundle": "npm run generate && node_modules/.bin/esbuild packages/cli/index.ts --bundle --outfile=bundle/gemini.js --platform=node --format=esm --banner:js=\"import { createRequire } from 'module'; const require = createRequire(import.meta.url); globalThis.__filename = require('url').fileURLToPath(import.meta.url); globalThis.__dirname = require('path').dirname(globalThis.__filename);\" && bash scripts/copy_bundle_assets.sh",
+    "bundle": "npm run generate && node esbuild.config.js",
     "build:cli": "npm run build --workspace packages/cli",
     "build:core": "npm run build --workspace packages/core",
     "build:packages": "npm run build:core && npm run build:cli",
@@ -42,7 +42,8 @@
   "files": [
     "bundle/",
     "README.md",
-    "LICENSE"
+    "LICENSE",
+    "node_modules/tree-sitter-*/build/Release/*.node"
   ],
   "devDependencies": {
     "@types/micromatch": "^4.0.9",
@@ -66,6 +67,12 @@
     "yargs": "^17.7.2"
   },
   "dependencies": {
-    "tree-sitter-rust": "^0.21.0"
+    "tree-sitter": "^0.21.0",
+    "tree-sitter-c-sharp": "^0.21.0",
+    "tree-sitter-go": "^0.21.0",
+    "tree-sitter-java": "^0.21.0",
+    "tree-sitter-python": "^0.21.0",
+    "tree-sitter-rust": "^0.21.0",
+    "tree-sitter-typescript": "^0.21.0"
   }
 }

package.json

@@ -29,13 +29,6 @@
     "minimatch": "^10.0.0",
     "shell-quote": "^1.8.2",
     "strip-ansi": "^7.1.0",
-    "tree-sitter": "^0.21.0",
-    "tree-sitter-c-sharp": "^0.21.0",
-    "tree-sitter-go": "^0.21.0",
-    "tree-sitter-java": "^0.21.0",
-    "tree-sitter-python": "^0.21.0",
-    "tree-sitter-rust": "^0.21.0",
-    "tree-sitter-typescript": "^0.21.0",
     "@opentelemetry/api": "^1.9.0",
     "@opentelemetry/sdk-node": "^0.52.0",
     "@opentelemetry/exporter-trace-otlp-grpc": "^0.52.0",

packages/core/package.json

@@ -0,0 +1,11 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// esbuild-banner.js
+import { createRequire } from 'module';
+const require = createRequire(import.meta.url);
+globalThis.__filename = require('url').fileURLToPath(import.meta.url);
+globalThis.__dirname = require('path').dirname(globalThis.__filename);