#!/bin/bash

# Pre-commit hook to enforce Windows compatibility and file size limits

#

# 1. Windows filenames: prevents characters that are reserved on Windows (< > : " | ? * \)

# so the repo can be cloned on Windows systems.

# 2. File size: rejects files larger than 10 MB. Many enterprise users mirror graphql-java

# into internal repositories that enforce file size limits.

# ANSI color codes for better output readability

RED='\033[0;31m'

YELLOW='\033[1;33m'

NC='\033[0m' # No Color

# Track if we found any errors

ERRORS_FOUND=0

echo "Running pre-commit checks..."

# Check 1: Windows-incompatible filenames

echo " Checking for Windows-incompatible filenames..."

# Windows reserved characters: < > : " | ? * \

# Note: We escape the backslash in the regex pattern

INVALID_CHARS='[<>:"|?*\\]'

# Get list of staged files

STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACR)

if [ -n "$STAGED_FILES" ]; then

# Check each staged file for invalid characters

INVALID_FILES=$(echo "$STAGED_FILES" | grep -E "$INVALID_CHARS" || true)

if [ -n "$INVALID_FILES" ]; then

echo -e "${RED}Error: The following files have Windows-incompatible characters in their names:${NC}"

echo "$INVALID_FILES" | while read -r file; do

echo " - $file"

done

echo -e "${YELLOW}Please rename these files to remove characters: < > : \" | ? * \\${NC}"

echo -e "${YELLOW}For ISO timestamps, replace colons with hyphens (e.g., 08:40:24 -> 08-40-24)${NC}"

ERRORS_FOUND=1

fi

fi

# Check 2: Files larger than 10MB

echo " Checking for files larger than 10MB..."

MAX_SIZE=$((10 * 1024 * 1024)) # 10 MB in bytes

LARGE_FILES=""

if [ -n "$STAGED_FILES" ]; then

while IFS= read -r file; do

if [ -f "$file" ]; then

# Try to get file size with cross-platform compatibility

size=$(stat -c%s "$file" 2>/dev/null || stat -f%z "$file" 2>/dev/null)

if [ -z "$size" ]; then

echo -e "${YELLOW}Warning: Could not determine size of $file, skipping size check${NC}"

continue

fi

if [ "$size" -gt "$MAX_SIZE" ]; then

# Format size in human-readable format using awk (more portable than bc)

size_mb=$(awk "BEGIN {printf \"%.2f\", $size/1024/1024}")

LARGE_FILES="${LARGE_FILES} - $file (${size_mb} MB)\n"

fi

fi

done <<< "$STAGED_FILES"

fi

if [ -n "$LARGE_FILES" ]; then

echo -e "${RED}Error: The following files exceed 10MB:${NC}"

echo -e "$LARGE_FILES"

echo -e "${YELLOW}Please consider one of these options:${NC}"

echo -e "${YELLOW} 1. Split the file into smaller parts with suffixes .part1, .part2, etc.${NC}"

echo -e "${YELLOW} 2. Remove unnecessary content from the file${NC}"

ERRORS_FOUND=1

fi

# Exit with error if any checks failed

if [ "$ERRORS_FOUND" -eq 1 ]; then

echo -e "${RED}Pre-commit checks failed. Please fix the issues above and try again.${NC}"

exit 1

fi

echo " All pre-commit checks passed!"

exit 0