Replace Next.js with Vercel native serverless functions (#109)

* Replace Next.js with Vercel native serverless functions

* avoid vercel run next auto detection

* add `”type”: “module”` to `package.json`

* fix extensions

* fix import flavor

* drop node-fetch and use builtin fetch

* update tsconfig and oxlint to error if files have no ts extension

---------

Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com>

Author: marcalexiei

.gitignore

@@ -1,2 +1,3 @@
 node_modules
-.next
+.next
+.vercel

.oxlintrc.jsonc

@@ -21,6 +21,16 @@
     "no-warning-comments": "off",
     "sort-keys": "off",
 
+    "import/extensions": [
+      "error",
+      {
+        "ts": "always",
+        "tsx": "always",
+        "ignorePackages": true,
+        "checkTypeImports": true,
+      },
+    ],
+
     "vitest/no-conditional-in-test": "off",
     "jest/no-conditional-in-test": "off",
 

pages/api/webhook.ts api/webhook.tspages/api/webhook.ts renamed to api/webhook.ts

@@ -1,6 +1,6 @@
 import { createNodeMiddleware, createProbot } from "probot";
 
-import app from "../../index";
+import app from "../index.ts";
 
 // Requires:
 // - APP_ID

get-changed-packages.ts

@@ -10,9 +10,8 @@ import type {
   PackageJSON as ChangesetPackageJSON,
 } from "@changesets/types";
 import type { Packages, Tool } from "@manypkg/get-packages";
-import { safeLoad } from "js-yaml";
+import jsYaml from "js-yaml";
 import micromatch from "micromatch";
-import fetch from "node-fetch";
 import type { ProbotOctokit } from "probot";
 
 interface PackageJSON extends ChangesetPackageJSON {
@@ -148,7 +147,7 @@ export const getChangedPackages = async ({
 
   if (isPnpm) {
     const pnpmWorkspaceContent = await fetchTextFile("pnpm-workspace.yaml");
-    const pnpmWorkspace = safeLoad(pnpmWorkspaceContent) as PnpmWorkspace;
+    const pnpmWorkspace = jsYaml.safeLoad(pnpmWorkspaceContent) as PnpmWorkspace;
 
     if (pnpmWorkspace.packages) {
       tool = {

index.ts

@@ -6,7 +6,7 @@ import humanId from "human-id";
 import markdownTable from "markdown-table";
 import type { Probot, Context } from "probot";
 
-import { getChangedPackages } from "./get-changed-packages";
+import { getChangedPackages } from "./get-changed-packages.ts";
 
 const getReleasePlanMessage = (releasePlan: ReleasePlan | null) => {
   if (!releasePlan) return "";

knip.json

@@ -0,0 +1,4 @@
+{
+  "$schema": "./node_modules/knip/schema.json",
+  "entry": ["api/**/*.ts"]
+}

next-env.d.ts

@@ -5,6 +5,7 @@
   "homepage": "https://github.com/apps/changeset-bot",
   "license": "MIT",
   "repository": "https://github.com/changesets/bot",
+  "type": "module",
   "scripts": {
     "format": "oxfmt",
     "format:check": "oxfmt --check",
@@ -29,22 +30,14 @@
     "@types/markdown-table": "^2.0.0",
     "@types/micromatch": "^4.0.1",
     "@types/node": "^25.5.0",
-    "@types/node-fetch": "^2.5.5",
-    "@types/react": "^18.0.14",
-    "@types/react-dom": "^18.0.5",
     "human-id": "^1.0.2",
     "js-yaml": "^3.14.0",
     "markdown-table": "^2.0.0",
     "micromatch": "^4.0.2",
-    "next": "^12.1.6",
-    "node-fetch": "^2.6.1",
     "probot": "^12.2.4",
-    "react": "^18.2.0",
-    "react-dom": "^18.2.0",
     "typescript": "^6.0.2"
   },
   "devDependencies": {
-    "@tsconfig/next": "^2.0.6",
     "knip": "^6.11.0",
     "msw": "^2.12.14",
     "oxfmt": "^0.42.0",

package.json

@@ -6,8 +6,8 @@ import { setupServer } from "msw/node";
 import { Probot, ProbotOctokit } from "probot";
 import { aroundEach, beforeAll, describe, it } from "vitest";
 
-import type { PRContext } from "../index";
-import changesetBot from "../index";
+import type { PRContext } from "../index.ts";
+import changesetBot from "../index.ts";
 
 import pullRequestOpen from "./fixtures/pull_request.opened.json";
 import pullRequestSynchronize from "./fixtures/pull_request.synchronize.json";

test/index.test.ts

@@ -1,12 +1,20 @@
 {
-  "extends": "@tsconfig/next/tsconfig.json",
   "compilerOptions": {
-    "allowJs": false,
-    "tsBuildInfoFile": "node_modules/.cache/.tsbuildinfo",
-    "forceConsistentCasingInFileNames": true,
+    "target": "esnext",
+    "module": "node16",
+    "moduleResolution": "node16",
+    "noEmit": true,
     "strict": true,
-    "moduleResolution": "bundler"
+    "forceConsistentCasingInFileNames": true,
+    "allowImportingTsExtensions": true,
+    "rewriteRelativeImportExtensions": true,
+    "skipLibCheck": true,
+    "lib": ["esnext"],
+    "allowJs": false,
+    "incremental": false,
+    "resolveJsonModule": true,
+    "isolatedModules": true
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "include": ["**/*.ts"],
   "exclude": ["node_modules"]
 }