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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:
schedule:
- cron: '29 18 * * *'
push:
branches: [ master ]
# Publish semver tags as releases.
tags: [ 'v*.*.*' ]
pull_request:
branches: [ master ]
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@v2
# 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@1e95c1de343b5b0c23352d6417ee3e48d5bcd422
# Workaround: https://github.com/docker/build-push-action/issues/461
- name: Setup Docker buildx
uses: docker/setup-buildx-action@79abd3f86f79a9d68a23c75a09a9a85889262adf
# 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@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
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@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
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@ad44023a93711e3deb337508980b4b5e9bcdc5dc
with:
context: .
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
# Sign the resulting Docker image digest except on PRs and private repos
# The keyless signing process records signatures on the Rekor public
# transparency log, so signing is disabled for private repos by default
# to avoid leaking private data. If you wish to sign things anyways,
# then this check can be removed and --force can be added to the cosign
# command below.
# https://github.com/sigstore/cosign
- name: Sign the published Docker image
if: ${{ github.event_name != 'pull_request' && !github.event.repository.private }}
env:
COSIGN_EXPERIMENTAL: "true"
# This step uses the identity token to provision an ephemeral certificate
# against the sigstore community Fulcio instance, and records it to the
# sigstore community Rekor transparency log.
run: cosign sign ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build-and-push.outputs.digest }}
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