terraform-docs/docs/how-to/github-action.md

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GitHub Action	How to use terraform-docs with GitHub Actions	docs parent how-to	209	false

To use terraform-docs GitHub Action, configure a YAML workflow file (e.g. .github/workflows/documentation.yml) with the following:

name: Generate terraform docs
on:
  - pull_request

jobs:
  docs:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
      with:
        ref: ${{ github.event.pull_request.head.ref }}

    - name: Render terraform docs and push changes back to PR
      uses: terraform-docs/gh-actions@main
      with:
        working-dir: .
        output-file: README.md
        output-method: inject
        git-push: "true"

Read more about terraform-docs GitHub Action and its configuration and examples.