From 4ab9e6dc14f562316f536ea19eed58f7b28c583f Mon Sep 17 00:00:00 2001
From: Jack Hsu <jack.hsu@gmail.com>
Date: Thu, 25 Jul 2024 20:01:27 -0400
Subject: [PATCH] fix(nextjs): fix inlined workspace root in .nx-helpers
 (#27136)

This PR fixes an issue where our `withNx` function for Next.js is
compiled with inlined `workspaceRoot` (to support container
environments). On Windows, we write the `.nx-helpers/with-nx.js` with
the following:

```js
workspaceRoot: 'C:\Users\user\projects\app',
```

The `\u` character result in a Node error: `Invalid Unicode escape
sequence`.

The fix is to escape `\` as `\\`, so when the file is written, the path
is valid and does not cause unicode errors.

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## Current Behavior
<!-- This is the behavior we have today -->

## Expected Behavior
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## Related Issue(s)
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Fixes #18824
---
 .../next/src/executors/build/lib/create-next-config-file.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/next/src/executors/build/lib/create-next-config-file.ts b/packages/next/src/executors/build/lib/create-next-config-file.ts
index e4e0bf1983462..ab2d804fc9141 100644
--- a/packages/next/src/executors/build/lib/create-next-config-file.ts
+++ b/packages/next/src/executors/build/lib/create-next-config-file.ts
@@ -124,7 +124,11 @@ export function getWithNxContent(
         index: getWithNxContextDeclaration.getStart(withNxSource),
         text: stripIndents`function getWithNxContext() {
           return {
-            workspaceRoot: '${workspaceRoot}',
+            workspaceRoot: '${
+              // For Windows, paths like C:\Users\foo\bar need to be written as C:\\Users\\foo\\bar,
+              // or else when the file is read back, the single "\" will be treated as an escape character.
+              workspaceRoot.replaceAll('\\', '\\\\')
+            }',
             libsDir: '${workspaceLayout().libsDir}'
           }
         }`,