action.yml

name: setup-infrastructure
description: Sets up runner environment for infrastructure code.

inputs:
  terraform-version:
    description: Terraform version to use
    default: '1.5.3'
    required: false
    type: string

runs:
  using: composite
  steps:
    - name: set helper variable
      shell: bash
      run: echo "${name}=${value}" >> $GITHUB_ENV
      env:
        name: my_terraform_zip_name
        value: terraform_${{ inputs.terraform-version }}_linux_amd64.zip
        # note: linux_amd64 will stay like that for a while, its tad too difficult to make it parametrized using 
        #       runner context and the worthiness of it is questionable assuming we'll always use linux on x64 :)

    - name: set helper variable
      shell: bash
      run: echo "${name}=${value}" >> $GITHUB_ENV
      env:
        name: my_terraform_dl_link
        value: https://releases.hashicorp.com/terraform/${{ inputs.terraform-version }}/${{ env.my_terraform_zip_name }}

    - uses: actions/cache@v3
      id: cache-terraform
      with:
        path: terraform
        key: terraform${{ inputs.terraform-version }}
        restore-keys: terraform

    - name: conditionally install terraform
      shell: bash
      if: steps.cache-terraform.outputs.cache-hit != 'true'
      run: |
        wget  ${{ env.my_terraform_dl_link }} 
        unzip ${{ env.my_terraform_zip_name }} 
        rm    ${{ env.my_terraform_zip_name }}
        echo "$(pwd)" >> $GITHUB_PATH

    - uses: actions/cache@v3
      id: cache-lockfile
      with:
        path: .terraform
        key: terraform${{ inputs.terraform-version }}-lockfile${{ hashFiles('**/.terraform.lock.hcl') }}
        restore-keys: terraform${{ inputs.terraform-version }}-lockfile

    - name: conditionally install dependencies
      shell: bash
      if: steps.cache-lockfile.outputs.cache-hit != 'true'
      run: terraform init -backend=false