fix #1913: enable the CLI with Deno

Author: evanw

CHANGELOG.md

@@ -20,6 +20,14 @@
             ╵ ~~~~~~
     ```
 
+* Enable esbuild's CLI with Deno ([#1913](https://github.com/evanw/esbuild/issues/1913))
+
+    This release allows you to use Deno as an esbuild installer, without also needing to use esbuild's JavaScript API. You can now use esbuild's CLI with Deno:
+
+    ```
+    deno run --allow-all "https://deno.land/x/[email protected]/mod.js" --version
+    ```
+
 ## 0.14.10
 
 * Enable tree shaking of classes with lowered static fields ([#175](https://github.com/evanw/esbuild/issues/175))

Makefile

@@ -93,7 +93,8 @@ node-unref-tests: | scripts/node_modules
 	node scripts/node-unref-tests.js
 
 lib-typecheck: | lib/node_modules
-	cd lib && node_modules/.bin/tsc -noEmit -p .
+	cd lib && node_modules/.bin/tsc -noEmit -p tsconfig.json
+	cd lib && node_modules/.bin/tsc -noEmit -p tsconfig-deno.json
 
 # End-to-end tests
 test-e2e: test-e2e-npm test-e2e-pnpm test-e2e-yarn-berry

lib/deno/mod.ts

@@ -328,3 +328,16 @@ let ensureServiceIsRunning = (): Promise<Service> => {
   }
   return longLivedService
 }
+
+// If we're called as the main script, forward the CLI to the underlying executable
+if (import.meta.main) {
+  Deno.run({
+    cmd: [await install()].concat(Deno.args),
+    cwd: defaultWD,
+    stdin: 'inherit',
+    stdout: 'inherit',
+    stderr: 'inherit',
+  }).status().then(({ code }) => {
+    Deno.exit(code)
+  })
+}

lib/tsconfig-deno.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "module": "es2020", // Allow the "import.meta" syntax
+    "target": "es2017", // Allow calling APIs such as "Object.entries"
+    "strict": true,
+  },
+  "exclude": [
+    "npm",
+  ],
+}

lib/tsconfig.json

@@ -2,6 +2,9 @@
   "compilerOptions": {
     "module": "CommonJS", // Allow the "import assignment" syntax
     "target": "es2017", // Allow calling APIs such as "Object.entries"
-    "strict": true
-  }
+    "strict": true,
+  },
+  "exclude": [
+    "deno",
+  ],
 }

scripts/esbuild.js

@@ -237,7 +237,7 @@ const buildDenoLib = (esbuildPath) => {
     path.join(repoDir, 'lib', 'deno', 'mod.ts'),
     '--bundle',
     '--outfile=' + path.join(denoDir, 'mod.js'),
-    '--target=es2020',
+    '--target=esnext',
     '--define:ESBUILD_VERSION=' + JSON.stringify(version),
     '--platform=neutral',
     '--log-level=warning',