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

    - name: Docker Hub Description
      uses: peter-evans/dockerhub-description@v2
      env:
        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
        DOCKERHUB_REPOSITORY: peterevans/dockerhub-description

Required environment variables

• DOCKERHUB_USERNAME - Docker Hub username. If updating a Docker Hub repository belonging to an organization, this user must have Admin permissions for the repository. Aliases: DOCKER_USERNAME
• DOCKERHUB_PASSWORD - Docker Hub password. Fallback to DOCKER_PASSWORD if set. Aliases: DOCKER_PASSWORD
• DOCKERHUB_REPOSITORY - The Docker Hub repository to update in the format <namespace>/<name>. May also be passed as a secret if considered sensitive. Aliases: DOCKER_REPOSITORY, GITHUB_REPOSITORY

Note: Docker Hub Personal Access Tokens cannot be used as they are not supported by the API. See here and here for further details. Unfortunately, this means that enabling the new 2FA feature on Docker Hub will prevent the action from working.

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.

    - name: Docker Hub Description
      uses: peter-evans/dockerhub-description@v2
      env:
        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
        DOCKERHUB_REPOSITORY: peterevans/dockerhub-description
        README_FILEPATH: ./some-path/README.md

Examples

The following workflow updates the Docker Hub repository description whenever there are changes to README.md and the workflow file itself on the master branch. This workflow assumes its location to be .github/workflows/dockerhub-description.yml.

name: Update Docker Hub Description
on:
  push:
    branches:
      - master
    paths:
      - README.md
      - .github/workflows/dockerhub-description.yml
jobs:
  dockerHubDescription:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Docker Hub Description
      uses: peter-evans/dockerhub-description@v2
      env:
        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
        DOCKERHUB_REPOSITORY: peterevans/dockerhub-description

Updates the Docker Hub repository description whenever a new release is created.

name: Update Docker Hub Description
on: release
jobs:
  dockerHubDescription:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Docker Hub Description
      uses: peter-evans/dockerhub-description@v2
      env:
        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
        DOCKERHUB_REPOSITORY: peterevans/dockerhub-description

Using the Docker image independently of GitHub Actions

The image can be executed in other environments independently of GitHub Actions. Simply volume mount the location of the README.md file to the container and set environment variables as follows.

docker run -v $PWD:/workspace \
  -e DOCKERHUB_USERNAME='user1' \
  -e DOCKERHUB_PASSWORD='xxxxx' \
  -e DOCKERHUB_REPOSITORY='user1/my-docker-image' \
  -e README_FILEPATH='/workspace/README.md' \
  peterevans/dockerhub-description:2.3

License

MIT