Taskfile.yml

version: 3
tasks:
  terraform-init:
    desc: Initialize Terraform.
    dir: infrastructure
    sources:
      - main.tf
    cmds:
      - terraform init

  package-layer:
    desc: Make Zip file containing the libraries the function will use.
    sources:
      - requirements.txt
    generates:
      - layer-src.zip
    cmds:
      - rm -f layer-src.zip
      - mkdir -p layer-src/python/lib/python3.9/site-packages/
      - pip install -r requirements.txt --target layer-src/python/lib/python3.9/site-packages/ --no-cache-dir
      - |
        cd layer-src \
          && zip ../layer-src.zip -r . \
          && cd .. \
          && rm -r layer-src

  package-lambda:
    desc: Package lambda zip file for deployment.
    deps:
      - package-layer
    sources:
      - src/**/*.py
    cmds:
      - rm -f lambda-src.zip
      - cp -R src lambda-src
      - |
        cd lambda-src \
            && zip ../lambda-src.zip -r . \
            && cd .. \
            && rm -r lambda-src

  deploy:
    desc: Deploy the function to AWS Lambda + API Gateway.
    dir: infrastructure
    deps:
      - terraform-init
      - package-lambda
    cmds:
      - terraform validate
      - terraform apply -auto-approve -input=false

  take-down:
    desc: Take down the infrastructure from AWS.
    dir: infrastructure
    cmds:
      - terraform destroy -auto-approve -input=false