Publish Docker Action is used to build, tag and publish docker image to your docker registry.

This simple example will use Dockerfile in your workspace to build image, attach the latest tag and push to docker default registry (docker.io). Repository name is your GitHub repository name by default.

- uses: jerray/publish-docker-action@master
  with:
    username: ${{ secrets.DOCKER_USERNAME }}
    password: ${{ secrets.DOCKER_PASSWORD }}

Use file and path arguments to set docker build file or build context if they are not placed in the default workspace direcotry.

Registry and repository name can be changed with registry and repository arguments. For example:

- uses: jerray/publish-docker-action@master
  with:
    username: ${{ secrets.DOCKER_USERNAME }}
    password: ${{ secrets.DOCKER_PASSWORD }}
    registry: docker.pkg.github.com
    repository: jerray/publish-docker-action

You can use static tag list by specify tags arguments. Tag names must be separated by comma.

- uses: jerray/publish-docker-action@master
  with:
    username: ${{ secrets.DOCKER_USERNAME }}
    password: ${{ secrets.DOCKER_PASSWORD }}
    registry: docker.pkg.github.com
    repository: jerray/publish-docker-action
    tags: latest,newest,master

Example above will build image and create three tags, and push all of them to the registry.

• jerray/publish-docker-action:latest
• jerray/publish-docker-action:newest
• jerray/publish-docker-action:master

This action can generate image tag automatically base on the different refs type.

If the refs refers to a branch, it uses the branch name as docker image name (master branch is renamed to latest).

If the refs refers to a pull request, it attaches a pr- prefix to branch name as docker image tag. To allow pull request build, you must set with.allow_pull_request to true.

When refs refers to a tag, it checks if the tag name is valid semantic version. If not, it uses tag name as docker image tag directly. Else it generates three tags based on the version number, each followed with pre-release information if there is any. For example:

• git tag 1.0.0 is mapped to 1, 1.0, 1.0.0
• git tag v1.0.0 is the same as above (prefix v is allowed)
• git tag v1.0.0-rc1 is mapped to 1-rc1, 1.0-rc1, 1.0.0-rc1
• git tag 20190921-actions is not a valid semantic version string, so docker image tag is just the same

- uses: jerray/publish-docker-action@master
  with:
    username: ${{ secrets.DOCKER_USERNAME }}
    password: ${{ secrets.DOCKER_PASSWORD }}
    registry: docker.pkg.github.com
    repository: jerray/publish-docker-action
    auto_tag: true

Auto tagging will override with.tags list.

Cache image can be used to build image. Just provide with.cache argument.

Use with.build_args to provide docker build-time variables. Multiple variables must be separated by comma.

- uses: jerray/publish-docker-action@master
  with:
    username: ${{ secrets.DOCKER_USERNAME }}
    password: ${{ secrets.DOCKER_PASSWORD }}
    registry: docker.pkg.github.com
    repository: jerray/publish-docker-action
    build_args: HTTP_PROXY=http://127.0.0.1,USER=nginx

Please use the latest released version rather than master.