name: Pre-Commit

on:
  pull_request:
  push:
    branches:
      - master

jobs:
  # Min Terraform version(s)
  getDirectories:
    name: Get root directories
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Install Python
        uses: actions/setup-python@v2
      - name: Build matrix
        id: matrix
        run: |
          DIRS=$(python -c "import json; import glob; print(json.dumps([x.replace('/versions.tf', '') for x in glob.glob('./**/versions.tf', recursive=True)]))")
          echo "::set-output name=directories::$DIRS"
    outputs:
      directories: ${{ steps.matrix.outputs.directories }}

  preCommitMinVersions:
    name: Min TF validate
    needs: getDirectories
    runs-on: ubuntu-latest
    strategy:
      matrix:
        directory: ${{ fromJson(needs.getDirectories.outputs.directories) }}
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Install Python
        uses: actions/setup-python@v2
      - name: Terraform min/max versions
        id: minMax
        uses: clowdhaus/terraform-min-max@v1.0.2
        with:
          directory: ${{ matrix.directory }}
      - name: Install Terraform v${{ steps.minMax.outputs.minVersion }}
        uses: hashicorp/setup-terraform@v1
        with:
          terraform_version: ${{ steps.minMax.outputs.minVersion }}
      - name: Install pre-commit dependencies
        run: pip install pre-commit
      - name: Execute pre-commit
        # Run only validate pre-commit check on min version supported
        if: ${{ matrix.directory !=  '.' }}
        run: pre-commit run terraform_validate --color=always --show-diff-on-failure --files ${{ matrix.directory }}/*
      - name: Execute pre-commit
        # Run only validate pre-commit check on min version supported
        if: ${{ matrix.directory ==  '.' }}
        run: pre-commit run terraform_validate --color=always --show-diff-on-failure --files $(ls *.tf)

  # Max Terraform version
  getBaseVersion:
    name: Module max TF version
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Terraform min/max versions
        id: minMax
        uses: clowdhaus/terraform-min-max@v1.0.2
    outputs:
      minVersion: ${{ steps.minMax.outputs.minVersion }}
      maxVersion: ${{ steps.minMax.outputs.maxVersion }}

  preCommitMaxVersion:
    name: Max TF pre-commit
    runs-on: ubuntu-latest
    needs: getBaseVersion
    strategy:
      fail-fast: false
      matrix:
        version:
          - ${{ needs.getBaseVersion.outputs.maxVersion }}
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Install Python
        uses: actions/setup-python@v2
      - name: Install Terraform v${{ matrix.version }}
        uses: hashicorp/setup-terraform@v1
        with:
          terraform_version: ${{ matrix.version }}
      - name: Install pre-commit dependencies
        run: |
          pip install pre-commit
          curl -Lo ./terraform-docs.tar.gz https://github.com/terraform-docs/terraform-docs/releases/download/v0.13.0/terraform-docs-v0.13.0-$(uname)-amd64.tar.gz && tar -xzf terraform-docs.tar.gz && chmod +x terraform-docs && sudo mv terraform-docs /usr/bin/
          curl -L "$(curl -s https://api.github.com/repos/terraform-linters/tflint/releases/latest | grep -o -E "https://.+?_linux_amd64.zip")" > tflint.zip && unzip tflint.zip && rm tflint.zip && sudo mv tflint /usr/bin/
      - name: Execute pre-commit
        # Run all pre-commit checks on max version supported
        if: ${{ matrix.version ==  needs.getBaseVersion.outputs.maxVersion }}
        run: pre-commit run --color=always --show-diff-on-failure --all-files