ci.yml

name: Continuous Integration

on:
  pull_request:
    types: [opened, edited, synchronize, ready_for_review]
    branches:
      - main

jobs:
  lint-test:
    name: Lint and Test Python code
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Set up Python 3.8.1
        uses: actions/setup-python@v2
        with:
          python-version: 3.8.1

      - name: Install dependencies
        run: |
          make setup

      - name: Lint our code
        run: |
          make lints.format.check

      - name: Test our code
        run: |
          make test.coverage

  create-lambda-layer-zip:
    name: Create lambda layer zip
    needs: lint-test
    runs-on: ubuntu-20.04
    permissions:
      contents: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
      
      - name: Set up Python 3.8.1
        uses: actions/setup-python@v2
        with:
          python-version: 3.8.1
      
      - name: Install aws-xray-sdk
        run: |
          pip3 install aws-xray-sdk -t ./python
      
      - name: Zip aws-xray-sdk
        run: |
          zip -r layer.zip ./python

      - name: Upload layer.zip artifact
        uses: actions/upload-artifact@v4
        with:
          name: layer
          path: ./layer.zip
  
  test-infra:
    needs: create-lambda-layer-zip
    name: Test Infrastructure w/ Localstack
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
      
      - name: Start Localstack
        run: |
          pip install localstack awscli-local[ver1] # install LocalStack cli and awslocal
          docker pull localstack/localstack         # Make sure to pull the latest version of the image
          localstack start -d                       # Start LocalStack in the background
          
          echo "Waiting for LocalStack startup..."  # Wait 30 seconds for the LocalStack container
          localstack wait -t 30                     # to become ready before timing out 
          echo "Startup complete"   

      - name: Override AWS Provider
        run: cp tests/test_provider.tf providers.tf
      
      - name: Initialize Terraform against our localstack
        run: terraform init

      - name: Download layer.zip from previous job
        uses: actions/download-artifact@v3
        with:
          name: layer

      - name: Apply Terraform to Localstack
        run: terraform apply -auto-approve -input=false -var access_key=test -var secret_key=test

      - name: Invoke Lambda
        run: |
          awslocal lambda list-functions
          awslocal lambda invoke --function-name lambda --payload '{ "foo": "bar" }' response.json
          # grep "Hello from lambda" response.json
          cat response.json
      
      - name: Destroy Terraform Resources in Localstack
        run: terraform destroy -var access_key=test -var secret_key=test -auto-approve

  plan-infra:
    needs: [test-infra]
    name: Plan Infrastructure w/ Terraform
    runs-on: ubuntu-20.04
    permissions:
      contents: read
      id-token: write
      packages: read
      pull-requests: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

      - name: Generate .auto.tfvars
        run: |
          echo "access_key=\"${{ secrets.AWS_ACCESS_KEY_ID }}\"" >> ./.auto.tfvars
          echo "secret_key=\"${{ secrets.AWS_SECRET_ACCESS_KEY }}\"" >> ./.auto.tfvars
          echo "---------------------------------------------------------"
          cat ./.auto.tfvars
          echo "---------------------------------------------------------"

      - name: Setup Terraform
        uses: hashicorp/setup-terraform@v2
        with:
          cli_config_credentials_token: ${{ secrets.TF_API_TOKEN }}

      - name: Terrform format
        id: fmt
        run: terraform fmt -check

      - name: Terraform Init
        id: init
        env:
          TF_TOKEN: ${{ secrets.TF_API_TOKEN }}
        run: terraform init
      
      - name: Download layer.zip from previous job
        uses: actions/download-artifact@v3
        with:
          name: layer

      - name: Terraform validate
        id: validate
        run: terraform validate -no-color

      - name: Terraform Plan
        id: plan
        if: github.event_name == 'pull_request'
        run: terraform plan -no-color -input=false
        continue-on-error: true

      - name: Update Pull Request
        uses: actions/github-script@v6
        if: github.event_name == 'pull_request'
        env:
          PLAN: "terraform\n${{ steps.plan.outputs.stdout }}"
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const output = `#### Terraform Format and Style 🖌\`${{ steps.fmt.outcome }}\`
            #### Terraform Initialization ⚙️\`${{ steps.init.outcome }}\`
            #### Terraform Plan 📖\`${{ steps.plan.outcome }}\`
            #### Terraform Validation 🤖\`${{ steps.validate.outcome }}\`

            <details><summary>Show Plan</summary>

            \`\`\`\n
            ${process.env.PLAN}
            \`\`\`

            </details>

            *Pushed by: @${{ github.actor }}, Action: \`${{ github.event_name }}\`*`;

            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: output
            })

      - name: Terraform Plan Status
        if: steps.plan.outcome == 'failure'
        run: exit 1