Creating Docker Container Actions

name: 'My Docker Action'
description: 'A GitHub Action that uses a Dockerfile'
inputs:
  image-name:
    description: 'Name of the Docker image to build'
    required: true
    default: 'myapp'
outputs:
  image-id:
    description: 'ID of the built Docker image'
runs:
  using: 'docker'
  image: 'Dockerfile'

FROM alpine:latest

WORKDIR /app

COPY . .

RUN apk add --no-cache nodejs npm

RUN npm install

CMD ["node", "index.js"]

FROM node:18-alpine

WORKDIR /app

COPY package*.json ./
RUN npm ci --only=production

COPY . .

CMD ["node", "index.js"]

name: 'My Docker Action'
description: 'A Docker-based GitHub Action to build and push images'
inputs:
  image-name:
    required: true
    description: 'Name of the Docker image to build'
outputs:
  image-url:
    description: 'URL of the built Docker image'
runs:
  image: 'docker://my-docker-action:latest'

name: Python CI
on: [push]
jobs:
  test:
    runs-on: ubuntu-latest
    container:
      image: python:3.10
    steps:
      - uses: actions/checkout@v4
      - name: Install dependencies
        run: |
          pip install -r requirements.txt
      - name: Run tests
        run: python -m pytest

name: "Build Docker Action"
on:
  push:
    branches: [ main ]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      - name: Build Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          tags: my-action:latest

name: 'Docker Container Action Example'
uses: './docker-action'
with:
  args: '--verbose --output /tmp/output.txt'

name: 'Docker Container Action Example'
inputs:
  message:
    description: 'Message to echo'
    required: true
    default: 'Hello World'
runs:
  using: 'docker'
  image: 'Dockerfile'
  env:
    CUSTOM_MESSAGE: ${{ inputs.message }}
    GITHUB_ACTOR: ${{ github.actor }}

name: "Docker Container Action"
on:
  workflow_call:

jobs:
  run:
    runs-on: ubuntu-latest
    steps:
      - name: "Mount workspace"
        uses: docker://my-action-image
        with:
          mount-workspace: true

FROM alpine:latest
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]

#!/bin/bash
set -e

echo "Running custom action..."
echo "Input parameter: $1"

name: 'Docker Container Action'
description: 'A sample Docker container action'
inputs:
  greeting:
    description: 'The greeting to use'
    required: true
    default: 'Hello'
  name:
    description: 'The name to greet'
    required: false
    default: 'World'
outputs:
  message:
    description: 'The generated message'
runs:
  using: 'docker'
  image: 'Dockerfile'

#!/bin/bash
greeting="${GITHUB_ACTION_INPUT_GREETING:-Hello}"
name="${GITHUB_ACTION_INPUT_NAME:-World}"
echo "$greeting $name"

echo "result=success" >> $GITHUB_OUTPUT

echo "result=success" >> $GITHUB_OUTPUT
echo "message=Action completed successfully" >> $GITHUB_OUTPUT

name: Build Docker Image
on:
  push:
    branches: [ main ]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Build Image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          build-args: |
            VERSION=1.0.0
            ENV=production

name: Publish Docker Action
on:
  push:
    branches: [ main ]

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Build and push image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ghcr.io/myuser/my-docker-action:latest

      - name: Update action manifest
        run: |
          echo "image=ghcr.io/myuser/my-docker-action:latest" >> $GITHUB_OUTPUT