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https://github.com/terraform-docs/gh-actions

A Github action for generating Terraform module documentation using terraform-docs and gomplate
https://github.com/terraform-docs/gh-actions

actions github-actions terraform terraform-docs

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A Github action for generating Terraform module documentation using terraform-docs and gomplate

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README 

        
# terraform-docs GitHub Actions



Generate Terraform module documentation in pull requests.



In addition to statically defined directory modules, this module can search specific

subfolders or parse `atlantis.yaml` for module identification and doc generation. This

action has the ability to auto commit docs to an open PR or after a push to a specific

branch.



## Version



`v1.3.0` (uses [terraform-docs] v0.19.0, which is supported and tested on Terraform

version 0.11+ and 0.12+ but may work for others.)



### Upgrade v0 to v1



Release v1 contains following breaking changes:



- default value of `output-file` has been changed to `README.md`

- default value of `template` has been changed to



  ```text

  

  {{ .Content }}

  

  ```



## Usage



To use terraform-docs github action, configure a YAML workflow file, e.g.

`.github/workflows/documentation.yml`, with the following:



```yaml

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 inside the README.md and push changes back to PR branch

      uses: terraform-docs/[email protected]

      with:

        working-dir: .

        output-file: README.md

        output-method: inject

        git-push: "true"

```



| NOTE: If `output-file` (default README.md) already exists it will need to be updated, with the block delimeters `` and ``, where the generated markdown will be injected. Otherwise the generated content will be appended at the end of the file. |

| --- |



| NOTE: If `output-file` (default README.md) doesn't exist it will created and the content will be saved into it. |

| --- |



## Configuration



### Inputs



| Name | Description | Default | Required |

|------|-------------|---------|----------|

| args | Additional arguments to pass to the command (see [full documentation](https://github.com/terraform-docs/terraform-docs/tree/master/docs)) | `""` | false |

| atlantis-file | Name of Atlantis file to extract list of directories by parsing it. To enable, provide the file name (e.g. `atlantis.yaml`) | `disabled` | false |

| config-file | Name of terraform-docs config file. To enable, provide the file name (e.g. `.terraform-docs.yml`) | `disabled` | false |

| fail-on-diff | Fail the job if there is any diff found between the generated output and existing file (ignored if `git-push` is set) | `false` | false |

| find-dir | Name of root directory to extract list of directories by running `find ./find\_dir -name \*.tf` (ignored if `atlantis-file` is set) | `disabled` | false |

| git-commit-message | Commit message | `terraform-docs: automated action` | false |

| git-push | If true it will commit and push the changes | `false` | false |

| git-push-sign-off | If true it will sign-off commit | `false` | false |

| git-push-user-email | If empty the no-reply email of the GitHub Actions bot will be used (i.e. `github-actions[bot]@users.noreply.github.com`) | `""` | false |

| git-push-user-name | If empty the name of the GitHub Actions bot will be used (i.e. `github-actions[bot]`) | `""` | false |

| git-sub-dir | Subdirectory that terraform code is checked out into | `""` | false |

| indention | Indention level of Markdown sections [1, 2, 3, 4, 5] | `2` | false |

| output-file | File in module directory where the docs should be placed | `README.md` | false |

| output-format | terraform-docs format to generate content (see [all formats](https://github.com/terraform-docs/terraform-docs/blob/master/docs/FORMATS\_GUIDE.md)) (ignored if `config-file` is set) | `markdown table` | false |

| output-method | Method should be one of `replace`, `inject`, or `print`. Set as an empty string if `output.mode` and `output.file` are defined in config-file | `inject` | false |

| recursive | If true it will update submodules recursively | `false` | false |

| recursive-path | Submodules path to recursively update | `modules` | false |

| template | When provided will be used as the template if/when the `output-file` does not exist. Set as an empty string if `output.template` is defined in config-file | `\n{{ .Content }}\n` | false |

| working-dir | Comma separated list of directories to generate docs for (ignored if `atlantis-file` or `find-dir` is set) | `.` | false |



#### Output Method (output-method)



- `print`



  This will just print the generated output



- `replace`



  This will create or replace the `output-file` at the determined module path(s)



- `inject`



  Instead of replacing the `output-file`, this will inject the generated documentation

  into the existing file between the predefined delimeters: ``

  and ``. If the file exists but does not contain the delimeters,

  the action will append the generated content at the end of `output-file`. If the file

  doesn't exist, it will create it using the value template which MUST have the delimeters.



#### Auto commit changes



To enable you need to ensure a few things first:



- set `git-push` to `true`

- use `actions/checkout@v3` with the head ref for PRs or branch name for pushes

  - PR



    ```yaml

    on:

      - pull_request

    jobs:

      docs:

        runs-on: ubuntu-latest

        steps:

        - uses: actions/checkout@v3

          with:

            ref: ${{ github.event.pull_request.head.ref }}

    ```



  - Push



    ```yaml

    on:

      push:

        branches:

          - master

    jobs:

      docs:

        runs-on: ubuntu-latest

        steps:

        - uses: actions/checkout@v3

          with:

            ref: master

    ```



### Outputs



| Name | Description |

|------|-------------|

| num\_changed | Number of files changed |



## Examples



### Single folder



```yaml

- name: Generate TF Docs

  uses: terraform-docs/[email protected]

  with:

    working-dir: .

```



### Multi folder



```yaml

- name: Generate TF Docs

  uses: terraform-docs/[email protected]

  with:

    working-dir: .,example1,example3/modules/test

```



### Use `atlantis.yaml` v3 to find all directories



```yaml

- name: Generate TF docs

  uses: terraform-docs/[email protected]

  with:

    atlantis-file: atlantis.yaml

```



### Find all `.tf` file under a given directory



```yaml

- name: Generate TF docs

  uses: terraform-docs/[email protected]

  with:

    find-dir: examples/

```



### Recursively under a given directory



```yaml

- name: Generate TF docs

  uses: terraform-docs/[email protected]

  with:

    working-dir: examples/

    recursive: true

    recursive-path: modules

```



Complete examples can be found [here](https://github.com/terraform-docs/gh-actions/tree/v1.3.0/examples).



[terraform-docs]: https://github.com/terraform-docs/terraform-docs