From 4052aee0707d45057522bd50d0171c38b2e5afad Mon Sep 17 00:00:00 2001
From: CoderDeltaLAN <CoderDeltaLAN@users.noreply.github.com>
Date: Sun, 21 Jun 2026 02:30:29 +0100
Subject: [PATCH] dx: make check script ruff invocation portable

---
 scripts/check.sh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/scripts/check.sh b/scripts/check.sh
index 1ed2c27..92b22dc 100755
--- a/scripts/check.sh
+++ b/scripts/check.sh
@@ -8,7 +8,14 @@ printf '\n== unit tests ==\n'
 PYTHONPATH=src python -m unittest discover -s tests -p 'test_*.py'
 
 printf '\n== ruff ==\n'
-python -m ruff check .
+if python -m ruff --version >/dev/null 2>&1; then
+    python -m ruff check .
+elif command -v ruff >/dev/null 2>&1; then
+    ruff check .
+else
+    printf '%s\n' 'ERROR: ruff is required. Install development tools with: python -m pip install -e ".[dev]"' >&2
+    exit 1
+fi
 
 printf '\n== text hygiene ==\n'
 python - <<'PY'