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50name: 🏗️📤 Build and publish 🐳 images
on:
push:
# branches: ["main"] # Triggers the workflow when a push event is detected on any branch.
env:
REGISTRY: ghcr.io # Sets the container registry where the image will be published.
IMAGE_NAME: ${{ github.repository }} # Sets the name of the GitHub repository.
jobs:
build-and-push-image:
name: 🏗️📤 Build and push 🐳 image # Names the job.
runs-on: ubuntu-latest # Specifies the operating system for the job.
permissions:
contents: read # Gives the job read access to the repository contents.
packages: write # Gives the job write access to packages.
steps:
- name: 👀📦 Checkout repository. # Names the first step.
uses: actions/checkout@v3 # Uses the "checkout" GitHub Action to check out the repository.
- name: 🔑📦 Login to container registry # Names the second step.
uses: docker/login-action@v2.1.0 # Uses the "login-action" GitHub Action to log into the container registry.
with:
registry: ${{ env.REGISTRY }} # Specifies the container registry.
username: ${{ github.actor }} # Specifies the username.
password: ${{ secrets.GITHUB_TOKEN }} # Specifies the password.
- name: 🔍📝 Extract metadata (🏷️, 🏷️) for 🐳 # Names the third step.
id: meta # Assigns an ID to the step.
uses: docker/metadata-action@v4.3.0 # Uses the "metadata-action" GitHub Action to extract metadata for the Docker image.
with:
flavor: | # Defines the flavor.
latest=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }} # Sets the latest tag based on whether the push event is for the default branch.
images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }} # Specifies the image name.
tags: | # Defines the tags.
type=raw,value=latest,priority=100,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }} # Sets the "latest" tag for default branch
type=sha,priority=400,enable=true,prefix={{branch}}-,suffix=,format=short # Sets a tag with the branch name and a short commit hash.
type=raw,prefix={{branch}}-,value=latest,priority=300,enable=${{ github.ref != format('refs/heads/{0}', github.event.repository.default_branch) }}
- name: 🏗️📤 Build and push 🐳 image # Names the fourth step.
uses: docker/build-push-action@v4.0.0 # Uses the "build-push-action" GitHub Action to build and push the Docker image.
with:
context: . # Specifies the build context as the current directory.
push: true # Specifies that the image should be pushed to the container registry.
tags: ${{ steps.meta.outputs.tags }} # Uses the tags output from the previous step.
labels: ${{ steps.meta.outputs.labels }} # Uses the labels output from the previous step.