Separate linters from cmake (#587)

tools/lint.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+PROJECT_ROOT=$(dirname "$(realpath "$0")")/..
+LINT_CPP=false
+LINT_PYTHON=false
+DRY_RUN=false
+
+usage() {
+    echo "Usage: $0 [cpp] [py] [dry]"
+    echo "  cpp     Lint C++ code"
+    echo "  py      Lint Python code"
+    echo "  dry     Dry run mode (no changes made)"
+}
+
+# Parse arguments
+for arg in "$@"; do
+    case "$arg" in
+        cpp)
+            LINT_CPP=true
+            ;;
+        py)
+            LINT_PYTHON=true
+            ;;
+        dry)
+            DRY_RUN=true
+            ;;
+        *)
+            echo "Error: Unknown argument '$arg'"
+            usage
+            exit 1
+            ;;
+    esac
+done
+
+# If no cpp or py specified, default to both
+if [ "$LINT_CPP" = false ] && [ "$LINT_PYTHON" = false ]; then
+    LINT_CPP=true
+    LINT_PYTHON=true
+fi
+
+if $LINT_CPP; then
+    echo "Linting C++ code..."
+    # Find all git-tracked files with .c/.h/.cpp/.hpp/.cc/.cu/.cuh extensions
+    files=$(git ls-files --cached | grep -E '\.(c|h|cpp|hpp|cc|cu|cuh)$')
+    if [ -n "$files" ]; then
+        if $DRY_RUN; then
+            clang-format -style=file --dry-run $files
+        else
+            clang-format -style=file -i $files
+        fi
+    fi
+fi
+
+if $LINT_PYTHON; then
+    echo "Linting Python code..."
+    # Find all git-tracked files with .py extension
+    files=$(git ls-files --cached | grep -E '\.py$')
+    if [ -n "$files" ]; then
+        if $DRY_RUN; then
+            python3 -m black --check --diff $files
+        else
+            python3 -m black $files
+        fi
+    fi
+fi