name: Lint
on: [push, pull_request]

jobs:
  tflint:
    name: TFLint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@master
      - name: TFLint
        uses: docker://wata727/tflint

  fmt:
    name: Code Format
    runs-on: ubuntu-latest
    container:
      image: hashicorp/terraform:latest
    steps:
      - uses: actions/checkout@master
      - run: terraform fmt --recursive -check=true

  docs:
    name: Docs
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@master
      - uses: actions/setup-python@v2
      - name: Install terraform-docs
        run: |
          # Get the download url of the latest version of terraform-docs
          tf_docs_download_url=$(curl -s https://api.github.com/repos/terraform-docs/terraform-docs/releases/latest | jq -rc '.assets[] | select( .name | contains("linux-amd64")).browser_download_url')
          mkdir -p $GITHUB_WORKSPACE/bin
          curl -Lo $GITHUB_WORKSPACE/bin/terraform-docs $tf_docs_download_url
          chmod +x $GITHUB_WORKSPACE/bin/terraform-docs
          echo "$GITHUB_WORKSPACE/bin" >> $GITHUB_PATH
      - name: Check Docs
        uses: pre-commit/action@v2.0.0
        with:
          extra_args: --show-diff-on-failure --all-files terraform_docs

  validate:
    name: Validate
    runs-on: ubuntu-latest
    container:
      image: hashicorp/terraform:0.12.29
    steps:
      - uses: actions/checkout@master
      - name: Validate Code
        env:
          AWS_REGION: 'us-east-1'
          TF_WARN_OUTPUT_ERRORS: 1
          TF_VAR_vpc_id: 'vpc-123456'
          TF_VAR_subnets: '["subnet-12345a"]'
          TF_VAR_workers_ami_id: 'ami-123456'
          TF_VAR_cluster_name: 'test_cluster'
        run: |
          terraform init
          terraform validate
      - name: Validate Examples
        run: |
          for example in $(find examples -maxdepth 1 -mindepth 1 -type d); do
            cd $example
            terraform init
            terraform validate
            cd -
          done

  minimum:
    name: Minimum version check
    runs-on: ubuntu-latest
    container:
      image: hashicorp/terraform:0.12.9
    steps:
      - uses: actions/checkout@master
      - name: Validate Code
        env:
          AWS_REGION: 'us-east-1'
          TF_WARN_OUTPUT_ERRORS: 1
        run: |
          sed -i -e 's/>=/=/' -e 's/ \(\d\+\.\d\+\)"/ \1.0"/' versions.tf
          terraform init
          terraform validate -var "region=${AWS_REGION}" -var "vpc_id=vpc-123456" -var "subnets=[\"subnet-12345a\"]" -var "workers_ami_id=ami-123456" -var "cluster_ingress_cidrs=[]" -var "cluster_name=test_cluster"