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docker-build-publish.yml
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name: Docker build & publish
on:
push:
branches: ["*"]
# Publish semver tags as releases.
tags: ["v*.*.*"]
pull_request:
branches: ["*"]
env:
# Use docker.io for Docker Hub if empty
REGISTRY: ghcr.io
# github.repository as <account>/<repo>
IMAGE_NAME: ${{ github.repository }}
BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
jobs:
build:
runs-on: ubuntu-latest
permissions:
contents: read
packages: write
steps:
- name: Checkout repository
uses: actions/checkout@v4
# Workaround: https://github.com/docker/build-push-action/issues/461
- name: Setup Docker buildx
uses: docker/setup-buildx-action@v3
# Login against a Docker registry (only if semver tag)
# https://github.com/docker/login-action
- name: Log into registry ${{ env.REGISTRY }}
if: startsWith(github.event.ref, 'refs/tags/v')
uses: docker/login-action@v3
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@v5
with:
images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
## Build and push Docker image with Buildx (push only if semver tag)
# https://github.com/docker/build-push-action
- name: Build and push Docker image
id: build-and-push
uses: docker/build-push-action@v6
with:
context: .
file: .docker/Dockerfile
pull: true
push: ${{ startsWith(github.event.ref, 'refs/tags/v') }}
target: prod
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
cache-from: type=gha
cache-to: type=gha,mode=max