main.yml

name: Deploy Lambda Function

on:
  push:
    branches:
      - main

env:
  AWS_REGION: eu-west-1
  LAMBDA_FUNCTION_NAME: OsrsProgressLambda
  AWS_ROLE_TO_ASSUME: arn:aws:iam::491234348360:role/group-ironman-lambda-role

permissions:
  id-token: write
  contents: read

jobs:
  deploy:
    name: Deploy Lambda
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set up Python
        uses: actions/setup-python@v4
        with:
          python-version: '3.12'

      - name: Install test dependencies
        run: |
          pip install awscli pytest requests discord-webhook

      - name: Run unit tests
        run: |
          python -m unittest discover -s ./tests -p 'test_*.py'

      - name: Install Lambda dependencies and package
        run: |
          mkdir -p lambda_package
          pip install --target=lambda_package discord-webhook requests
          cp lambda_function.py lambda_package/
          cd lambda_package
          zip -r ../function.zip .
          cd ..

      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v3
        with:
          aws-region: ${{ env.AWS_REGION }}
          role-to-assume: ${{ env.AWS_ROLE_TO_ASSUME }}
          role-session-name: GitHubActionsLambdaDeployment

      - name: Check if Lambda function exists
        id: check_lambda
        run: |
          if aws lambda get-function --function-name ${{ env.LAMBDA_FUNCTION_NAME }} > /dev/null 2>&1; then
            echo "lambda_exists=true" >> $GITHUB_OUTPUT
          else
            echo "lambda_exists=false" >> $GITHUB_OUTPUT
          fi

      - name: Create or Update Lambda function
        run: |
          if [ "${{ steps.check_lambda.outputs.lambda_exists }}" == "false" ]; then
            echo "Creating Lambda function..."
            aws lambda create-function --function-name ${{ env.LAMBDA_FUNCTION_NAME }} > /dev/null \
              --runtime python3.12 --role ${{ env.AWS_ROLE_TO_ASSUME }} \
              --handler lambda_function.lambda_handler --zip-file fileb://function.zip
          else
            echo "Updating Lambda function..."
            aws lambda update-function-code > /dev/null \
              --function-name ${{ env.LAMBDA_FUNCTION_NAME }} \
              --zip-file fileb://function.zip --publish
          fi

      - name: Clean up
        run: rm -rf function.zip lambda_package