delete-review-app.yml

name: Delete Review App

on:
  pull_request:
    types: [closed]
    branches: [main]
  workflow_dispatch:
    inputs:
      pr_number:
        description: PR number of review app to delete
        required: true
        type: string
jobs:
  delete-review-app:
    name: Delete Review App ${{ github.event.pull_request.number }}
    concurrency: deploy_review_${{ github.event.pull_request.number }}
    runs-on: ubuntu-latest
    environment: review
    steps:
      - uses: actions/checkout@v3
      - name: Extract configuration from tfvars
        id: config
        run: |
          if [ ${{ github.event_name }} == 'workflow_dispatch' ]; then
            PR_NUMBER=${{ github.event.inputs.pr_number }}
          else
            PR_NUMBER=${{ github.event.pull_request.number }}
          fi

          if [ -z "$PR_NUMBER" ]; then
            echo "::error ::Failed to extract PR_NUMBER"
            exit 1
          fi

          RESOURCE_PREFIX=$(jq -r '.resource_prefix' $TFVARS)
          APP_RESOURCE_GROUP_NAME=$RESOURCE_PREFIX-review-pr-$PR_NUMBER-rg
          STORAGE_ACCOUNT_NAME=$(jq -r '.storage_account_name' $TFVARS)
          TERRAFORM_VERSION=$(awk '/{/{f=/^terraform/;next}f' terraform.tf | grep -o [0-9\.]*)
          DEV_TFVARS=workspace_variables/dev.tfvars.json
          TF_RESOURCE_GROUP_NAME=$(jq -r '.resource_group_name' $DEV_TFVARS)
          TF_STATE_CONTAINER=$(awk '/{/{f=/backend/;next}f' terraform.tf | grep -o "\"[a-z\-]*\"" | tr -d \")

          if [ -z "$APP_RESOURCE_GROUP_NAME" ]; then
            echo "::error ::Failed to extract app_resource_group_name from $TFVARS"
            exit 1
          fi

          if [ -z "$STORAGE_ACCOUNT_NAME" ]; then
            echo "::error ::Failed to extract storage_account_name from $TFVARS"
            exit 1
          fi

          if [ -z "$TERRAFORM_VERSION" ]; then
            echo "::error ::Failed to extract terraform_version from terraform.tf"
            exit 1
          fi

          if [ -z "$TF_RESOURCE_GROUP_NAME" ]; then
            echo "::error ::Failed to extract resource_group_name from $DEV_TFVARS"
            exit 1
          fi

          if [ -z "$TF_STATE_CONTAINER" ]; then
            echo "::error ::Failed to extract tf_state_container from terraform.tf"
            exit 1
          fi

          echo "app_resource_group_name=$APP_RESOURCE_GROUP_NAME" >> $GITHUB_ENV
          echo "pr_number=$PR_NUMBER" >> $GITHUB_ENV
          echo "storage_account_name=$STORAGE_ACCOUNT_NAME" >> $GITHUB_ENV
          echo "terraform_version=$TERRAFORM_VERSION" >> $GITHUB_ENV
          echo "tf_resource_group_name=$TF_RESOURCE_GROUP_NAME" >> $GITHUB_ENV
          echo "tf_state_container=$TF_STATE_CONTAINER" >> $GITHUB_ENV
        shell: bash
        env:
          TFVARS: workspace_variables/review.tfvars.json
        working-directory: terraform

      - uses: Azure/login@v1
        with:
          creds: ${{ secrets.AZURE_CREDENTIALS }}

      - run: |
          TFSTATE_CONTAINER_ACCESS_KEY="$(az storage account keys list -g ${{ env.tf_resource_group_name }} -n ${{ env.storage_account_name }} | jq -r '.[0].value')"
          echo "::add-mask::$TFSTATE_CONTAINER_ACCESS_KEY"
          echo "TFSTATE_CONTAINER_ACCESS_KEY=$TFSTATE_CONTAINER_ACCESS_KEY" >> $GITHUB_ENV
        shell: bash

      - uses: hashicorp/setup-terraform@v2
        with:
          terraform_version: ${{ env.terraform_version }}
          terraform_wrapper: false

      - name: Check resource group exists
        run: |
          GROUP=$(az group exists --name ${{ env.app_resource_group_name }})
          if [[ "$GROUP" =~ "true" ]]; then
            echo "REVIEW_APP_EXISTS=true" >> $GITHUB_ENV
          fi

      - name: Set Environment variables
        if: env.REVIEW_APP_EXISTS == 'true'
        run: |
          TF_STATE_FILE=review/review-pr-${{ env.pr_number }}.tfstate
          echo "TF_STATE_FILE=$TF_STATE_FILE" >> $GITHUB_ENV

          pr_state_file=$(az storage blob list -c ${{ env.tf_state_container }} \
            --account-key ${{ env.TFSTATE_CONTAINER_ACCESS_KEY }} \
            --account-name ${{ env.storage_account_name }} \
            --prefix $TF_STATE_FILE --query "[].name" -o tsv)
          if [ -n "$pr_state_file" ]; then
            echo "TF_STATE_EXISTS=true" >> $GITHUB_ENV
          fi

      - name: Terraform
        if: env.TF_STATE_EXISTS == 'true'
        id: terraform
        run: |
          make ci review terraform-destroy pr_id=${{ env.pr_number }}
        env:
          ARM_ACCESS_KEY: ${{ env.TFSTATE_CONTAINER_ACCESS_KEY }}
          TF_VAR_azure_sp_credentials_json: ${{ secrets.AZURE_CREDENTIALS }}
          TF_VAR_aytq_docker_image: ${{ github.sha }}
        shell: bash

      - name: Delete tf state file
        if: env.TF_STATE_EXISTS == 'true'
        run: |
          az storage blob delete -c ${{ env.tf_state_container }} --name ${{ env.TF_STATE_FILE }} \
          --account-key ${{ env.TFSTATE_CONTAINER_ACCESS_KEY }} \
          --account-name ${{ env.storage_account_name }}