[primitives] minify sources (#925)

* [primitives] minify sources

* add changeset

* Update packages/primitives/scripts/build.ts

Co-authored-by: Tom Lienard <tom.lienrd@gmail.com>

---------

Co-authored-by: Kiko Beats <josefrancisco.verdu@gmail.com>
Co-authored-by: Tom Lienard <tom.lienrd@gmail.com>

.changeset/hungry-bananas-lay.md

@@ -0,0 +1,5 @@
+---
+'@edge-runtime/primitives': patch
+---
+
+minify source texts

packages/primitives/package.json

@@ -26,6 +26,7 @@
     "@edge-runtime/format": "workspace:*",
     "@ungap/structured-clone": "1.2.0",
     "blob-polyfill": "7.0.20220408",
+    "esbuild": "0.23.0",
     "esbuild-plugin-alias": "latest",
     "event-target-shim": "6.0.2",
     "tsup": "8",

packages/primitives/scripts/build.ts

@@ -2,6 +2,7 @@ import { basename, join, resolve } from 'path'
 import alias from 'esbuild-plugin-alias'
 import { Options, build } from 'tsup'
 import fs from 'fs'
+import esbuild from 'esbuild'
 
 const TARGET = 'node16.8'
 
@@ -160,10 +161,17 @@ async function generateTextFiles() {
     loadSourceWithPolyfills,
   )
   for (const file of files) {
-    const contents = await fs.promises.readFile(
-      resolve(__dirname, '../dist', file),
-      'utf8',
-    )
+    const {
+      outputFiles: [minified],
+    } = await esbuild.build({
+      entryPoints: [resolve(__dirname, '../dist', file)],
+      write: false,
+      minify: true,
+      bundle: true,
+      platform: 'node',
+      external: ['./streams'],
+    })
+    const contents = minified.text
     await fs.promises.writeFile(
       resolve(__dirname, '../dist', `${file}.text.js`),
       `module.exports = ${JSON.stringify(contents)}`,