Check Xcode Cloud/GitHub Action Xcode versions

.github/workflows/main.yml

@@ -37,7 +37,13 @@ jobs:
       - name: Set Xcode version
         run: |
           echo DEVELOPER_DIR=/Applications/${{matrix.xcode}}.app >> "$GITHUB_ENV"
+
       - uses: actions/checkout@v4
+
+      - name: Check Xcode version
+        run: |
+          Scripts/check_xcode_version.py
+
       - uses: ./.github/actions/clone-everything
         with:
           access-token: ${{ secrets.ACCESS_TOKEN }}

.xcode-version

@@ -0,0 +1 @@
+Xcode 16.1

Scripts/check_xcode_version.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+
+import subprocess
+
+
+def get_actual_version():
+    return subprocess.run(
+        ["xcodebuild", "-version"], check=True, capture_output=True, encoding="utf8"
+    ).stdout.split("\n")[0]
+
+
+def get_expected_version():
+    with open(".xcode-version", "r") as file:
+        return file.read().rstrip()
+
+
+def main():
+    actual_version = get_actual_version()
+    expected_version = get_expected_version()
+    if actual_version != expected_version:
+        print(
+            f"You’re using {actual_version} but you should be using {expected_version}."
+        )
+        exit(1)
+
+
+if __name__ == "__main__":
+    main()

ci_scripts/ci_post_clone.sh

@@ -5,4 +5,5 @@ set -eux
 ./send_build_notification.py started || :
 
 cd ..
+Scripts/check_xcode_version.py
 make dependencies