pre-commit

#!/bin/sh
# AKOS pre-commit hook — rejects commits with clang-format violations.
#
# Install:
#   cp tools/pre-commit .git/hooks/pre-commit
#   chmod +x .git/hooks/pre-commit

CLANG_FORMAT=${CLANG_FORMAT:-clang-format}

if ! command -v "$CLANG_FORMAT" > /dev/null 2>&1; then
    echo "warning: clang-format not found, skipping style check"
    exit 0
fi

FAIL=0
FILES=$(git diff --cached --name-only --diff-filter=ACM | grep -E '\.(c|cpp|h|hpp)$')

if [ -z "$FILES" ]; then
    exit 0
fi

for FILE in $FILES; do
    "$CLANG_FORMAT" --dry-run --Werror "$FILE" 2>/dev/null
    if [ $? -ne 0 ]; then
        echo "  style violation: $FILE"
        FAIL=1
    fi
done

if [ $FAIL -ne 0 ]; then
    echo ""
    echo "Commit rejected: clang-format violations found."
    echo "Fix with:  clang-format -i <file>"
    echo "Or fix all: find . -name '*.c' -o -name '*.h' | xargs clang-format -i"
    exit 1
fi

exit 0