Build and Push Docker Image workflow (wolffcatskyy/crowdsec-blocklist-import)
The Build and Push Docker Image workflow from wolffcatskyy/crowdsec-blocklist-import, explained and optimized by Latchkey.
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What it does
This is the Build and Push Docker Image workflow from the wolffcatskyy/crowdsec-blocklist-import repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.
Below, Latchkey shows a faster, safer version produced by its optimization engine.
The workflow
workflow (.yml)
name: Build and Push Docker Image
on:
push:
branches: [main]
pull_request:
branches: [main]
release:
types: [published]
env:
REGISTRY: ghcr.io
IMAGE_NAME: ${{ github.repository }}
jobs:
build:
runs-on: ubuntu-latest
permissions:
contents: read
packages: write
steps:
- name: Checkout
uses: actions/checkout@v4
- name: Verify version matches tag
if: github.event_name == 'release'
run: |
TAG_VERSION="${{ github.event.release.tag_name }}"
TAG_VERSION="${TAG_VERSION#v}"
CODE_VERSION=$(python3 -c "
import re
with open('blocklist_import.py') as f:
match = re.search(r'__version__\s*=\s*\"([^\"]+)\"', f.read())
print(match.group(1) if match else 'UNKNOWN')
")
if [ "$TAG_VERSION" != "$CODE_VERSION" ]; then
echo "::error::Tag version ($TAG_VERSION) does not match __version__ ($CODE_VERSION) in blocklist_import.py"
echo "::error::Bump __version__ in blocklist_import.py to match the tag before releasing."
exit 1
fi
echo "Version check passed: tag=$TAG_VERSION, code=$CODE_VERSION"
- name: Set up QEMU
uses: docker/setup-qemu-action@v3
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
- name: Log in to Container Registry
if: github.event_name != 'pull_request'
uses: docker/login-action@v3
with:
registry: ${{ env.REGISTRY }}
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
- name: Extract metadata
id: meta
uses: docker/metadata-action@v5
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}},enable=${{ !startsWith(github.ref, 'refs/tags/v0.') }}
type=raw,value=latest,enable=${{ github.event_name == 'release' || github.ref_name == 'main' }}
- name: Build and push
uses: docker/build-push-action@v5
with:
context: .
platforms: linux/amd64,linux/arm64
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
build-args: |
VERSION=${{ github.event_name == 'release' && github.event.release.tag_name || 'dev' }}
cache-from: type=gha
cache-to: type=gha,mode=max
The same workflow, on Latchkey
Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.
name: Build and Push Docker Image on: push: branches: [main] pull_request: branches: [main] release: types: [published] env: REGISTRY: ghcr.io IMAGE_NAME: ${{ github.repository }} concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: build: timeout-minutes: 30 runs-on: latchkey-small permissions: contents: read packages: write steps: - name: Checkout uses: actions/checkout@v4 - name: Verify version matches tag if: github.event_name == 'release' run: | TAG_VERSION="${{ github.event.release.tag_name }}" TAG_VERSION="${TAG_VERSION#v}" CODE_VERSION=$(python3 -c " import re with open('blocklist_import.py') as f: match = re.search(r'__version__\s*=\s*\"([^\"]+)\"', f.read()) print(match.group(1) if match else 'UNKNOWN') ") if [ "$TAG_VERSION" != "$CODE_VERSION" ]; then echo "::error::Tag version ($TAG_VERSION) does not match __version__ ($CODE_VERSION) in blocklist_import.py" echo "::error::Bump __version__ in blocklist_import.py to match the tag before releasing." exit 1 fi echo "Version check passed: tag=$TAG_VERSION, code=$CODE_VERSION" - name: Set up QEMU uses: docker/setup-qemu-action@v3 - name: Set up Docker Buildx uses: docker/setup-buildx-action@v3 - name: Log in to Container Registry if: github.event_name != 'pull_request' uses: docker/login-action@v3 with: registry: ${{ env.REGISTRY }} username: ${{ github.actor }} password: ${{ secrets.GITHUB_TOKEN }} - name: Extract metadata id: meta uses: docker/metadata-action@v5 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}},enable=${{ !startsWith(github.ref, 'refs/tags/v0.') }} type=raw,value=latest,enable=${{ github.event_name == 'release' || github.ref_name == 'main' }} - name: Build and push uses: docker/build-push-action@v5 with: context: . platforms: linux/amd64,linux/arm64 push: ${{ github.event_name != 'pull_request' }} tags: ${{ steps.meta.outputs.tags }} labels: ${{ steps.meta.outputs.labels }} build-args: | VERSION=${{ github.event_name == 'release' && github.event.release.tag_name || 'dev' }} cache-from: type=gha cache-to: type=gha,mode=max
What changed
- Run on Latchkey managed runners with one line (
runs-on), which apply the fixes below automatically and self-heal transient failures. This example useslatchkey-small; pick the runner size that fits the job. - Cancel superseded runs when a branch or PR gets a newer push.
- Add a job timeout so a hung step cannot burn hours of runner time.
5 third-party actions are referenced by a movable tag. Pin them to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.
What Latchkey heals here
This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:
- Container pulls and builds
This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.