pre-commit

#!/bin/bash

# Git pre-commit hook to format C/C++ files with clang-format
# Only processes .h/.hpp/.c/.cpp files in src directory

# Exit on error
set -e

# Function to check if clang-format is available
if ! command -v clang-format &> /dev/null; then
    echo "Error: clang-format is not installed or not in PATH"
    echo "Please install clang-format to use this pre-commit hook"
    exit 1
fi

# Get list of staged files
staged_files=$(git diff --cached --name-only --diff-filter=ACM)

# Check if there are any staged files
if [ -z "$staged_files" ]; then
    echo "No staged files to format"
    exit 0
fi

# Process each staged file
files_to_format=""
for file in $staged_files; do
    # Check if file is in src directory and has C/C++ extension
    if [[ "$file" =~ ^src/.*\.(h|hpp|c|cpp)$ ]]; then
        # Check if file exists (might be a new file being added)
        if [ -f "$file" ]; then
            files_to_format="$files_to_format $file"
        fi
    fi
done

# Check if there are any files to format
if [ -z "$files_to_format" ]; then
    echo "No C/C++ files in src/ directory to format"
    exit 0
fi

echo "Formatting C/C++ files with clang-format..."

# Format each file
format_error=0
for file in $files_to_format; do
    echo "Formatting: $file"
    
    # Format the file in place
    if ! clang-format -i "$file"; then
        echo "Error: Failed to format $file"
        format_error=1
        continue
    fi
    
    # Re-add the formatted file to staging area
    if ! git add "$file"; then
        echo "Error: Failed to re-add $file to staging area"
        format_error=1
    fi
done

# Exit with appropriate status
if [ $format_error -ne 0 ]; then
    echo "Some files failed to format properly"
    exit 1
fi

echo "All C/C++ files formatted successfully with clang-format"
exit 0