add plugin build script

Author: zardoy

buildTsPlugin.mjs

@@ -0,0 +1,31 @@
+//@ts-check
+import { ensureDir } from 'fs-extra'
+import { build } from 'esbuild'
+import { join, resolve } from 'path'
+import { writePackageJsonFile } from 'typed-jsonfile'
+
+export const buildTsPlugin = async (/** @type {string} */ outDir, /** @type {string} */ name, /** @type {string} */ entrypoint) => {
+    outDir = resolve(outDir)
+    entrypoint = resolve(entrypoint)
+    await ensureDir(outDir)
+    await writePackageJsonFile(
+        { dir: outDir },
+        {
+            name,
+            // TODO
+            version: '0.0.0',
+            main: 'index.js',
+        },
+    )
+    await build({
+        bundle: true,
+        platform: 'node',
+        treeShaking: true,
+        format: 'cjs',
+        entryPoints: [entrypoint],
+        outfile: join(outDir, 'index.js'),
+    })
+}
+
+const name = 'my-typescript-plugin-2'
+buildTsPlugin(`out/node_modules/${name}`, name, 'typescript-2/src/index.ts')