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Document forked repo image publishing #10

Document forked repo image publishing

Document forked repo image publishing #10

name: Docker
# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.
on:
# push:
# branches: [ "main" ]
# Publish semver tags as releases.
# tags: [ 'v*.*.*' ]
release:
types: [published]
pull_request:
branches: [ "main" ]
env:
DOCKERHUB_USERNAME: ${{ vars.DOCKERHUB_USERNAME }}
IMAGE_NAME: ${{ vars.IMAGE_NAME }}
REGISTRY: ${{ vars.REGISTRY }}
jobs:
build:
runs-on: ubuntu-latest
permissions:
contents: read
packages: write
# This is used to complete the identity challenge
# with sigstore/fulcio when running outside of PRs.
id-token: write
steps:
- name: Checkout repository
uses: actions/checkout@v4
# Install the cosign tool except on PR
# https://github.com/sigstore/cosign-installer
# TODO enable once the repo goes public
# - name: Install cosign
# if: github.event_name != 'pull_request'
# uses: sigstore/cosign-installer@f3c664df7af409cb4873aa5068053ba9d61a57b6 #v2.6.0
# with:
# cosign-release: 'v1.11.0'
# Workaround: https://github.com/docker/build-push-action/issues/461
- name: Setup Docker buildx
uses: docker/setup-buildx-action@edfb0fe6204400c56fbfd3feba3fe9ad1adfa345
# Login against a Docker registry except on PR
# https://github.com/docker/login-action
- name: Log into GH registry (ghcr.io)
if: github.event_name != 'pull_request'
uses: docker/login-action@3d58c274f17dffee475a5520cbe67f0a882c4dbb
with:
registry: ghcr.io
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
- name: Log into Docker Hub registry
if: github.event_name != 'pull_request' && env.DOCKERHUB_USERNAME != ''
uses: docker/login-action@3d58c274f17dffee475a5520cbe67f0a882c4dbb
with:
username: ${{ env.DOCKERHUB_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
# Extract metadata (tags, labels) for Docker
# https://github.com/docker/metadata-action
# 1st image name is for GH package repo
# 2nd image name is for DockerHub image
- name: Extract Docker metadata
id: meta
uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c
with:
images: |
${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
# Build and push Docker image with Buildx (don't push on PR)
# https://github.com/docker/build-push-action
- name: Build and push Docker image
id: build-and-push
uses: docker/build-push-action@9f6f8c940b91232557f8699b21341a08624a8dce
with:
context: .
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
cache-from: type=gha
cache-to: type=gha,mode=max
# Sign the resulting Docker image digest except on PRs.
# This will only write to the public Rekor transparency log when the Docker
# repository is public to avoid leaking data. If you would like to publish
# transparency data even for private images, pass --force to cosign below.
# https://github.com/sigstore/cosign
# TODO enable once the repo goes public
# - name: Sign the published Docker image
# if: ${{ github.event_name != 'pull_request' }}
# env:
# COSIGN_EXPERIMENTAL: "true"
# This step uses the identity token to provision an ephemeral certificate
# against the sigstore community Fulcio instance.
# run: echo "${{ steps.meta.outputs.tags }}" | xargs -I {} cosign sign {}@${{ steps.build-and-push.outputs.digest }}