# Docker Hub Description

A GitHub action to update a Docker Hub repository description from `README.md`.

This is useful if you `docker push` your images to Docker Hub. It provides an easy, automated way to keep your Docker Hub repository description in sync with your GitHub repository `README.md` file.

## Usage

```
action "Update Docker Hub Repository Description" {
  uses = "peter-evans/dockerhub-description@1.0"
  secrets = ["DOCKERHUB_USERNAME", "DOCKERHUB_PASSWORD", "DOCKERHUB_REPOSITORY"]
}
```

#### Required secrets

- `DOCKERHUB_USERNAME` - Docker Hub username
- `DOCKERHUB_PASSWORD` - Docker Hub password
- `DOCKERHUB_REPOSITORY` - The name of the Docker Hub repository to update. (This may also be an environment variable if not considered sensitive)

#### Optionally specifying the file path

The action assumes that there is a file called `README.md` located at the root of the repository.
If this is not the case, the path can be overridden with an environment variable.

```
action "Update Docker Hub Repository Description" {
  uses = "peter-evans/dockerhub-description@1.0"
  secrets = ["DOCKERHUB_USERNAME", "DOCKERHUB_PASSWORD", "DOCKERHUB_REPOSITORY"]
  env = {
    README_FILEPATH = "./some-path/README.md"
  }
}
```

#### Examples

Updates the Docker Hub repository description whenever there is a `git push` to the `master` branch.
```
workflow "New workflow" {
  on = "push"
  resolves = ["Update Docker Hub Repository Description"]
}

action "Filter master branch" {
  uses = "actions/bin/filter@master"
  args = "branch master"
}

action "Update Docker Hub Repository Description" {
  needs = ["Filter master branch"]
  uses = "peter-evans/dockerhub-description@1.0"
  secrets = ["DOCKERHUB_USERNAME", "DOCKERHUB_PASSWORD", "DOCKERHUB_REPOSITORY"]
}
```

Updates the Docker Hub repository description whenever a new release is created.
```
workflow "New workflow" {
  on = "release"
  resolves = ["Update Docker Hub Repository Description"]
}

action "Update Docker Hub Repository Description" {
  uses = "peter-evans/dockerhub-description@1.0"
  secrets = ["DOCKERHUB_USERNAME", "DOCKERHUB_PASSWORD", "DOCKERHUB_REPOSITORY"]
}
```

## License

MIT License - see the [LICENSE](LICENSE) file for details