From 4ca55663ee7be1de2d7f04417685df81dd3a690e Mon Sep 17 00:00:00 2001
From: Detlev Detleffsen <detlev.detleffsen@deutschebahn.com>
Date: Tue, 2 Jun 2026 18:19:30 +0200
Subject: [PATCH] fix(core): support Windows symlinks via junction/copy
 fallback

On Windows, fs.symlink() fails without elevated privileges.
Use junctions for directories and copyFile for files instead.
Unix behavior remains unchanged (plain symlink).
---
 packages/core/src/paths/symlinks.ts | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/paths/symlinks.ts b/packages/core/src/paths/symlinks.ts
index 95b14fc..2d372f9 100644
--- a/packages/core/src/paths/symlinks.ts
+++ b/packages/core/src/paths/symlinks.ts
@@ -44,7 +44,16 @@ export async function createSymlinks(
           // ignore — entry doesn't exist yet
         }
 
-        await fs.symlink(entryAbsPath, symlinkPath);
+        const entryStat = await fs.stat(entryAbsPath);
+        if (process.platform === "win32") {
+          if (entryStat.isDirectory()) {
+            await fs.symlink(entryAbsPath, symlinkPath, "junction");
+          } else {
+            await fs.copyFile(entryAbsPath, symlinkPath);
+          }
+        } else {
+          await fs.symlink(entryAbsPath, symlinkPath);
+        }
       }
     }
   } catch (error) {
@@ -104,3 +113,4 @@ export async function removeSymlinks(targetDir: string): Promise<void> {
     }
   }
 }
+