build-image

Build and push Docker image GitHub Action

This GitHub Action builds a Docker image and pushes it to a registry. It also sets up the base image, tags the image with various references, and uses Buildx to build multi-arch images if enabled.

Inputs

Name	Description	Required	Default Value
repo	Repository name. Defaults to git repository name.	No
registry	Registry name.	No
platforms	Build multi-arch image.	No
build-args	Extra arguments to pass to Docker.	No
context	Build context.	No	.
dockerfile	Dockerfile path.	No	Dockerfile
push	Push image to registry.	No	false
cache	Cache image layers if buildx enabled.	No	true

Outputs

Name	Description	Example
image	Docker image	docker.pkg.github.com/repo/image
uri	Docker image	docker.pkg.github.com/repo/image:123abc
repo	Repository name	repo
branch	Branch name	main

Usage

name: CI/CD Pipeline

on:
  push:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest

    steps:

    - name: Checkout code
      uses: actions/checkout@v3

    - name: Duplo Setup
      uses: duplocloud/actions/setup@main

    - name: Build and Push Docker Image
      uses: duplocloud/actions/build-image@main
      with:
        repo: my-repo
        registry: my-registry
        platforms: linux/amd64,linux/arm64
        build-args: >
          --build-arg MY_VAR=value
        context: ./app
        dockerfile: Dockerfile.dev
        push: true
        cache: true

References

• Docker Official GHA
• Third Party Actions:
  • crazy-max/ghaction-github-runtime@v3
  • docker/setup-qemu-action@v2
  • docker/setup-buildx-action@v2