From cf138d1737b83203e799f786a4cb783ca7b00c93 Mon Sep 17 00:00:00 2001
From: Abraham Egnor <abraham.egnor@mongodb.com>
Date: Tue, 18 Mar 2025 12:34:25 -0400
Subject: [PATCH] RUST-2181 Fix rustup installation on windows

---
 .evergreen/install-dependencies.sh |  9 +++++++++
 .evergreen/unsymlink.py            | 19 +++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 .evergreen/unsymlink.py

diff --git a/.evergreen/install-dependencies.sh b/.evergreen/install-dependencies.sh
index 4cb49e508..478899e4c 100755
--- a/.evergreen/install-dependencies.sh
+++ b/.evergreen/install-dependencies.sh
@@ -21,6 +21,15 @@ for arg; do
   if [ $arg == "rust" ]; then
     curl https://sh.rustup.rs -sSf | sh -s -- -y --no-modify-path $DEFAULT_HOST_OPTIONS
 
+    # Cygwin has a bug with reporting symlink paths that breaks rustup; see 
+    # https://github.com/rust-lang/rustup/issues/4239.  This works around it by replacing the
+    # symlinks with copies.
+    if [ "Windows_NT" == "$OS" ]; then
+      pushd ${CARGO_HOME}/bin
+      python3 ../../.evergreen/unsymlink.py
+      popd
+    fi
+
     # This file is not created by default on Windows
     echo 'export PATH="$PATH:${CARGO_HOME}/bin"' >>${CARGO_HOME}/env
     echo "export CARGO_NET_GIT_FETCH_WITH_CLI=true" >>${CARGO_HOME}/env
diff --git a/.evergreen/unsymlink.py b/.evergreen/unsymlink.py
new file mode 100644
index 000000000..5d199429e
--- /dev/null
+++ b/.evergreen/unsymlink.py
@@ -0,0 +1,19 @@
+import os
+import shutil
+
+found = []
+for entry in os.scandir():
+    if not entry.is_symlink():
+        print(f"Skipping {entry.name}: not a symlink")
+        continue
+    target = os.readlink(entry.name)
+    if target != "rustup.exe":
+        print(f"Skipping {entry.name}: not rustup.exe")
+        continue
+    print(f"Found {entry.name}")
+    found.append(entry.name)
+
+for name in found:
+    print(f"Replacing {name} symlink with copy")
+    os.remove(name)
+    shutil.copy2("rustup.exe", name)
\ No newline at end of file