deploy-lambda-TicketGenerationService.yml

name: Deploy Python Lambda TicketGenerationService

on:
  push:
    branches:
      - main
    paths:
      - 'services/TicketGenerationService/TicketGenerationService.py' # Change to the file extension of the language that you are using.


env:
  AWS_REGION: eu-north-1                   # set this to your preferred AWS region, e.g. us-west-1
  S3_BUCKET: ticket-booking-services
  S3_KEY: SeatReservationService_deployment_package.zip
  LAMBDA_FUNCTION_NAME: TicketGenerationService

jobs:
  deploy:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout Repository
      uses: actions/checkout@v2
      with:
        fetch-depth: 2 # To fetch the current commit and its parent (so we can compare)

    - name: Setup AWS CLI
      uses: aws-actions/configure-aws-credentials@v1
      with:
        aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
        aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
        aws-region: ${{ env.AWS_REGION }} # Modify this to your desired AWS region

    - name: Print changed files # To properly debug what is being deployed (It can be removed).
      run: |
        echo "List of changed files:"
        echo $(git diff --name-only HEAD^ HEAD)


    - name: Deploy Modified Files
      run: |
        # Download the existing zip from S3
        aws s3 cp s3://$S3_BUCKET/$S3_KEY existing_lambda.zip

        # Unzip the existing package
        unzip existing_lambda.zip -d lambda_env

        # Copy only the modified .py files from the commit into the unzipped directory
        # This will maintain their directory structure.
        for file in $(git diff-tree --no-commit-id --name-only -r HEAD); do
            if [[ $file == *.py ]]; then
                # Create the directory structure in lambda_env for the modified file
                mkdir -p lambda_env/$(dirname $file)
                # Copy the modified file
                cp $file lambda_env/$file
                # Print what you've done with the file
                echo "Copied $file to lambda_env/$file"
                echo "Content of $file after copying:"
                cat lambda_env/$file
            fi
        done

        # Zip the directory again
        cd lambda_env
        zip -r ../updated_lambda.zip .
        cd ..

        # Upload the updated zip to S3
        aws s3 cp updated_lambda.zip s3://$S3_BUCKET/$S3_KEY

        # Update Lambda function code
        aws lambda update-function-code --function-name $LAMBDA_FUNCTION_NAME --s3-bucket $S3_BUCKET --s3-key $S3_KEY

        # Cleanup
        rm -r lambda_env
        rm existing_lambda.zip updated_lambda.zip