build_layers.sh

#!/bin/bash

# Build AWS Lambda Layers for WhatsApp Handler
set -e

echo "🚀 Building AWS Lambda Layers..."

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# Function to print colored output
print_status() {
    echo -e "${GREEN}[INFO]${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1"
}

print_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

# Check if Python 3.12 is available
if ! command -v python3.12 &> /dev/null; then
    print_error "Python 3.12 is not installed"
    exit 1
fi

print_status "Python version: $(python3.12 --version)"

# Create base directories
print_status "Creating layer directories..."
mkdir -p layers/wp_lambda_layer/python/lib/python3.12/site-packages
mkdir -p layers/wp_additional_layer/python/lib/python3.12/site-packages
mkdir -p layers/phonepe_layer/python/lib/python3.12/site-packages

# Install wp_lambda_layer dependencies
print_status "Installing wp_lambda_layer dependencies..."
pip3.12 install --no-cache-dir --target layers/wp_lambda_layer/python/lib/python3.12/site-packages \
    requests==2.31.0 \
    boto3==1.34.0 \
    botocore==1.34.0 \
    urllib3==1.26.18 \
    certifi==2023.11.17 \
    charset-normalizer==3.3.2 \
    idna==3.6 \
    jmespath==1.0.1 \
    python-dateutil==2.8.2 \
    s3transfer==0.10.0 \
    six==1.16.0

# Install wp_additional_layer dependencies
print_status "Installing wp_additional_layer dependencies..."
pip3.12 install --no-cache-dir --target layers/wp_additional_layer/python/lib/python3.12/site-packages \
    pg8000==1.30.4 \
    scramp==1.4.4 \
    asn1crypto==1.5.1

# Install PhonePe SDK
print_status "Installing PhonePe SDK..."
pip3.12 install --no-cache-dir --target layers/phonepe_layer/python/lib/python3.12/site-packages \
    --index-url https://phonepe.mycloudrepo.io/public/repositories/phonepe-pg-sdk-python \
    --extra-index-url https://pypi.org/simple \
    phonepe_sdk==1.1.0

# Remove unnecessary files to reduce layer size
print_status "Cleaning up unnecessary files..."
find layers/ -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
find layers/ -type f -name "*.pyc" -delete 2>/dev/null || true
find layers/ -type f -name "*.pyo" -delete 2>/dev/null || true
find layers/ -type d -name "*.dist-info" -exec rm -rf {} + 2>/dev/null || true
find layers/ -type d -name "*.egg-info" -exec rm -rf {} + 2>/dev/null || true
find layers/ -type f -name "*.so" -exec strip {} + 2>/dev/null || true

# Create zip files
print_status "Creating layer zip files..."
cd layers

# Create wp_lambda_layer.zip
print_status "Creating wp_lambda_layer.zip..."
cd wp_lambda_layer
zip -r ../wp_lambda_layer.zip . -x "*.pyc" "*/__pycache__/*"
cd ..

# Create wp_additional_layer.zip
print_status "Creating wp_additional_layer.zip..."
cd wp_additional_layer
zip -r ../wp_additional_layer.zip . -x "*.pyc" "*/__pycache__/*"
cd ..

# Create phonepe_layer.zip
print_status "Creating phonepe_layer.zip..."
cd phonepe_layer
zip -r ../phonepe_layer.zip . -x "*.pyc" "*/__pycache__/*"
cd ..

# Show file sizes
print_status "Layer sizes:"
du -sh wp_lambda_layer.zip wp_additional_layer.zip phonepe_layer.zip

# Verify layer structure
print_status "Verifying layer structure..."
echo "wp_lambda_layer contents:"
unzip -l wp_lambda_layer.zip | head -20

echo -e "\nwp_additional_layer contents:"
unzip -l wp_additional_layer.zip | head -20

echo -e "\nphonepe_layer contents:"
unzip -l phonepe_layer.zip | head -20

print_status "✅ All layers created successfully!"
print_status "📦 Layer files:"
ls -la *.zip

print_status "🚀 Ready to upload to AWS Lambda!"
echo -e "\n${GREEN}Next steps:${NC}"
echo "1. Upload wp_lambda_layer.zip to AWS Lambda as a layer"
echo "2. Upload wp_additional_layer.zip to AWS Lambda as a layer"
echo "3. Upload phonepe_layer.zip to AWS Lambda as a layer"
echo "4. Add all three layers to your Lambda function"
echo "5. Set Python runtime to 3.12"