This is one of a suite of OpenTofu related actions - find them at dflook/terraform-github-actions.

This action uses the tofu fmt -recursive command to reformat files in a directory into a canonical format.

• path

  The path containing OpenTofu files to format.

  • Type: string
  • Optional
  • Default: The action workspace

• workspace

  OpenTofu workspace to inspect when discovering the OpenTofu version to use, if the version is not otherwise specified. See dflook/tofu-version for details.

  • Type: string
  • Optional
  • Default: default

• variables

  Variables to set when initializing OpenTofu. This should be valid OpenTofu syntax - like a variable definition file. Variables set here override any given in var_files.

  with:
    variables: |
      image_id = "${{ secrets.AMI_ID }}"
      availability_zone_names = [
        "us-east-1a",
        "us-west-1c",
      ]

  • Type: string
  • Optional

• var_file

  List of tfvars files to use, one per line. Paths should be relative to the GitHub Actions workspace

  with:
    var_file: |
      common.tfvars
      prod.tfvars

  • Type: string
  • Optional

• backend_config

  List of OpenTofu backend config values, one per line. This is used for discovering the OpenTofu version to use, if the version is not otherwise specified. See dflook/tofu-version for details.

  with:
    backend_config: token=${{ secrets.BACKEND_TOKEN }}

  • Type: string
  • Optional

• backend_config_file

  List of OpenTofu backend config files to use, one per line. This is used for discovering the OpenTofu version to use, if the version is not otherwise specified. See dflook/tofu-version for details. Paths should be relative to the GitHub Actions workspace

  with:
    backend_config_file: prod.backend.tfvars

  • Type: string
  • Optional

• GITHUB_DOT_COM_TOKEN

  This is used to specify a token for GitHub.com when the action is running on a GitHub Enterprise instance. This is only used for downloading OpenTofu binaries from GitHub.com. If this is not set, an unauthenticated request will be made to GitHub.com to download the binary, which may be rate limited.

  • Type: string
  • Optional

• TERRAFORM_CLOUD_TOKENS

  For the purpose of detecting the OpenTofu version to use from a cloud backend. API tokens for cloud hosts, of the form <host>=<token>. Multiple tokens may be specified, one per line. These tokens may be used with the remote backend and for fetching required modules from the registry.

  e.g:

  env:
    TERRAFORM_CLOUD_TOKENS: app.terraform.io=${{ secrets.TF_CLOUD_TOKEN }}

  With other registries:

  env:
    TERRAFORM_CLOUD_TOKENS: |
      app.terraform.io=${{ secrets.TF_CLOUD_TOKEN }}
      tofu.example.com=${{ secrets.TF_REGISTRY_TOKEN }}

  • Type: string
  • Optional

This example automatically creates a pull request to fix any formatting problems that get merged into the main branch.

name: Fix OpenTofu file formatting

on:
  push:
    branches:
      - main

jobs:
  format:
    runs-on: ubuntu-latest
    name: Check OpenTofu file are formatted correctly
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: tofu fmt
        uses: dflook/tofu-fmt@v2
        with:
          path: my-tofu-config

      - name: Create Pull Request
        uses: peter-evans/create-pull-request@v5
        with:
          commit-message: tofu fmt
          title: Reformat tofu files
          body: Update OpenTofu files to canonical format using `tofu fmt`
          branch: automated-tofu-fmt