From 61d0a2f0441038423b824ae2f3151dcb9dad3bb0 Mon Sep 17 00:00:00 2001
From: Dario Piotrowicz <dario@cloudflare.com>
Date: Tue, 28 Nov 2023 22:27:43 +0000
Subject: [PATCH] print warning in case developers are using a different
 package manager to run @cloudflare/next-on-pages (#554)

---
 .changeset/blue-seals-fail.md                         |  5 +++++
 .../src/buildApplication/buildApplication.ts          | 11 ++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/blue-seals-fail.md

diff --git a/.changeset/blue-seals-fail.md b/.changeset/blue-seals-fail.md
new file mode 100644
index 000000000..9616927c0
--- /dev/null
+++ b/.changeset/blue-seals-fail.md
@@ -0,0 +1,5 @@
+---
+'@cloudflare/next-on-pages': patch
+---
+
+print warning in case developers are using a different package manager to run @cloudflare/next-on-pages
diff --git a/packages/next-on-pages/src/buildApplication/buildApplication.ts b/packages/next-on-pages/src/buildApplication/buildApplication.ts
index 0e18c5f78..ee7881044 100644
--- a/packages/next-on-pages/src/buildApplication/buildApplication.ts
+++ b/packages/next-on-pages/src/buildApplication/buildApplication.ts
@@ -3,7 +3,7 @@ import { join, resolve } from 'path';
 import { cp } from 'fs/promises';
 import { getPackageManager } from 'package-manager-manager';
 import type { CliOptions } from '../cli';
-import { cliError, cliLog, cliSuccess } from '../cli';
+import { cliError, cliLog, cliSuccess, cliWarn } from '../cli';
 import { getVercelConfig } from './getVercelConfig';
 import { buildWorkerFile } from './buildWorkerFile';
 import { buildVercelOutput } from './buildVercelOutput';
@@ -43,6 +43,15 @@ export async function buildApplication({
 		throw new Error('Error: Could not detect current package manager in use');
 	}
 
+	if (pm.projectPackageManager && pm.name !== pm.projectPackageManager) {
+		cliWarn(
+			`The project is set up for ${pm.projectPackageManager} but it is currently being run` +
+				` via ${pm.name} this might lead to build errors, please be sure to use the same package manager` +
+				` your project uses when running @cloudflare/next-on-pages`,
+			{ spaced: true },
+		);
+	}
+
 	let buildSuccess = true;
 	if (!skipBuild) {
 		try {