Docker tag from github.ref

A GitHub Action to generate a Docker tag from github.ref

Usage

This action only generates a Docker tag.

To build and push Docker images, you need to use another action like docker/build-push-action.

steps:
  - uses: actions/checkout@v2
  - id: docker-tag
    uses: yuya-takeyama/docker-tag-from-github-ref-action@v1
  - name: Build and push
    uses: docker/build-push-action@v2
    with:
      push: true
      tags: user/app:${{ steps.docker-tag.outputs.tag }}

Inputs

Name	Required	Default	Description
latest-branches	false	'main,master'	Comma-separated names of branches to be latest Docker tag
remove-version-tag-prefix	false	'true'	Remove v from version tag prefix

Outputs

Name	Description
tag	Generated Docker tag

Tag generation example

This is the default behavior.

Git Reference	github.ref	Output
main branch	refs/heads/main	latest
master branch	refs/heads/master	latest
v1.2.3 tag	refs/tags/v1.2.3	1.2.3
Pull Request #123	refs/pull/1/merge	pr-123
foo branch	refs/heads/foo	foo
bar tag	refs/tags/bar	bar