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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*.*.*' ]
pull_request:
branches: [ "main" ]
env:
# Use docker.io for Docker Hub if empty
REGISTRY: ghcr.io
# github.repository as <account>/<repo>
IMAGE_NAME: ${{ github.repository }}
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@v3
# Workaround: https://github.com/docker/build-push-action/issues/461
- name: Setup Docker buildx
uses: docker/setup-buildx-action@v2
# Login against a Docker registry except on PR
# https://github.com/docker/login-action
- name: Log into registry ${{ env.REGISTRY }}
if: github.event_name != 'pull_request'
uses: docker/login-action@v2
with:
registry: ${{ env.REGISTRY }}
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
# Extract metadata (tags, labels) for Docker
# https://github.com/docker/metadata-action
- name: Extract Docker metadata
id: meta
uses: docker/metadata-action@v4
with:
images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
tags: |
type=ref,event=branch
type=ref,event=pr
type=semver,pattern={{version}}
type=semver,pattern={{major}}.{{minor}}
type=semver,pattern={{major}}
type=ref,event=branch,prefix=,suffix=-{{sha}}-{{date 'x'}}
# Cache dependencies
# https://github.com/actions/cache
- name: Cache Docker layers
uses: actions/cache@v3
with:
path: /tmp/.buildx-cache
key: ${{ runner.os }}-multi-buildx-${{ github.sha }}
restore-keys: |
${{ runner.os }}-multi-buildx
# 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@v4
with:
context: .
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
cache-from: type=local,src=/tmp/.buildx-cache
# Note the mode=max here
# More: https://github.com/moby/buildkit#--export-cache-options
# And: https://github.com/docker/buildx#--cache-tonametypetypekeyvalue
cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new
# Temp fix / Disabled on self-hosted runner
# https://github.com/docker/build-push-action/issues/252
# https://github.com/moby/buildkit/issues/1896
- name: Move cache
run: |
rm -rf /tmp/.buildx-cache
mv /tmp/.buildx-cache-new /tmp/.buildx-cache
# Install the cosign tool except on PR
# https://github.com/sigstore/cosign-installer
- name: Install cosign
if: ${{ github.event_name != 'pull_request' }}
uses: sigstore/cosign-installer@v3
# with:
# cosign-release: 'v2.2.2'
# 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
- 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 }}" | grep -E '^(.+):(.+)-(.+)-(.+)$' | xargs -I {} cosign sign --yes {}@${{ steps.build-and-push.outputs.digest }}