From 9d5d4109d4033b8fe3dbb112ca53eced1fcd4348 Mon Sep 17 00:00:00 2001
From: JohnAlbin <virtually.johnalbin@gmail.com>
Date: Thu, 19 Oct 2023 20:59:32 +0800
Subject: [PATCH] build(next-drupal): add .d.cts type definition files

---
 packages/next-drupal/.npmignore   |  1 +
 packages/next-drupal/package.json | 13 +++++++++++++
 packages/next-drupal/postBuild.js | 22 ++++++++++++++++++++++
 3 files changed, 36 insertions(+)
 create mode 100644 packages/next-drupal/postBuild.js

diff --git a/packages/next-drupal/.npmignore b/packages/next-drupal/.npmignore
index 7299177ef..c7a87b5f8 100644
--- a/packages/next-drupal/.npmignore
+++ b/packages/next-drupal/.npmignore
@@ -1,4 +1,5 @@
 /coverage
 /CHANGELOG.md
+/postBuild.js
 /tests
 /tsconfig.json
diff --git a/packages/next-drupal/package.json b/packages/next-drupal/package.json
index ad0b87ba2..cbac2aad5 100644
--- a/packages/next-drupal/package.json
+++ b/packages/next-drupal/package.json
@@ -7,6 +7,18 @@
   "type": "module",
   "main": "dist/index.cjs",
   "module": "dist/index.modern.js",
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./dist/index.d.ts",
+        "default": "./dist/index.modern.js"
+      },
+      "require": {
+        "types": "./dist/index.d.cts",
+        "default": "./dist/index.cjs"
+      }
+    }
+  },
   "types": "dist/index.d.ts",
   "license": "MIT",
   "publishConfig": {
@@ -18,6 +30,7 @@
   },
   "scripts": {
     "prepare": "microbundle --no-compress --jsx React.createElement --format modern,cjs",
+    "postprepare": "node postBuild.js",
     "dev": "microbundle watch --no-compress --jsx React.createElement --format modern,cjs",
     "test": "jest"
   },
diff --git a/packages/next-drupal/postBuild.js b/packages/next-drupal/postBuild.js
new file mode 100644
index 000000000..4dc9eb99d
--- /dev/null
+++ b/packages/next-drupal/postBuild.js
@@ -0,0 +1,22 @@
+import { readdir, copyFile } from "node:fs/promises"
+
+const files = await readdir("./dist")
+const tasks = []
+for (const file of files) {
+  if (file.endsWith(".modern.js")) {
+    const base = file.replace(/\.modern\.js$/, "")
+
+    // Make a duplicate of the type definitions.
+    //
+    // From the TypeScript docs:
+    //
+    // "It’s important to note that the CommonJS entrypoint and the ES module
+    // entrypoint each needs its own declaration file, even if the contents are
+    // the same between them."
+    //
+    // @see https://www.typescriptlang.org/docs/handbook/esm-node.html#packagejson-exports-imports-and-self-referencing
+    tasks.push(copyFile(`./dist/${base}.d.ts`, `./dist/${base}.d.cts`))
+  }
+}
+await Promise.all(tasks)
+console.log(`Created unique *.d.cts files for CommonJS build.`)