terraform-action.yaml

name: stg

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  plan:
    runs-on: ubuntu-latest
    container:
      image: $IMAGE
    env:
      TF_WORKSPACE: stg
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      TF_IN_AUTOMATION: true
    steps:
      - name: checkout code
        uses: actions/checkout@v2
      # Terraform plan and output to file
      - name: plan
        id: plan
        run: | 
          terraform plan \
           --out=tfplan \
           -no-color \
           --input=false
      # Set Plan to ENV as step outputs dont support multiline
      - name: show
        id: show
        run: | 
          export CHANGES="$(terraform show -no-color tfplan)"
          echo "CHANGES<<EOF" >> $GITHUB_ENV
          echo "$CHANGES" >> $GITHUB_ENV
          echo "EOF" >> $GITHUB_ENV
      # Used to add the plan to the pull requests
      - name: comment pull request
        if: github.event_name == 'pull_request'
        uses: actions/github-script@0.9.0
        env:
          PLAN: ${{ env.CHANGES }}
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const output = `
              Terraform Output Results for Run
              <details><summary>Show Plan</summary>
              
              \`\`\`\n
              ${process.env.PLAN}
              \`\`\`
              
              </details>
              `
            github.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: output
            })