# Defines two custom environment variables for the workflow. These are used for the Container registry domain, and a name for the Docker image that this workflow builds.
env:
REGISTRY:ghcr.io
IMAGE_NAME:${{ github.repository }}
# There is a single job in this workflow. It's configured to run on the latest available version of Ubuntu.
# Uses the `docker/login-action` action to log in to the Container registry registry using the account and password that will publish the packages. Once published, the packages are scoped to the account defined here.
- name:Log in to the Container registry
uses:docker/login-action@v3.1.0
with:
registry:${{ env.REGISTRY }}
username:${{ github.actor }}
password:${{ secrets.GITHUB_TOKEN }}
# This step uses [docker/metadata-action](https://github.com/docker/metadata-action#about) to extract tags and labels that will be applied to the specified image. The `id` "meta" allows the output of this step to be referenced in a subsequent step. The `images` value provides the base name for the tags and labels.
- name:Extract metadata (tags, labels) for Docker
id:meta
uses:docker/metadata-action@v5.5.1
with:
images:${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
tags:|
type=ref,event=branch
type=ref,event=tag
type=ref,event=pr
type=sha
flavor:|
latest=${{ github.event_name == 'release' }}
# This step uses the `docker/build-push-action` action to build the image, based on your repository's `Dockerfile`. If the build succeeds, it pushes the image to GitHub Packages.
# It uses the `context` parameter to define the build's context as the set of files located in the specified path. For more information, see "[Usage](https://github.com/docker/build-push-action#usage)" in the README of the `docker/build-push-action` repository.
# It uses the `tags` and `labels` parameters to tag and label the image with the output from the "meta" step.