Docker Publish workflow (tangyoha/telegram_media_downloader)

The Docker Publish workflow from tangyoha/telegram_media_downloader, explained and optimized by Latchkey.

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Source: tangyoha/telegram_media_downloader.github/workflows/docker-publish.ymlLicense MITView source

What it does

This is the Docker Publish workflow from the tangyoha/telegram_media_downloader 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: Docker Publish

on:
  push:
    branches:
      - master
    tags:
      - 'v*'

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    outputs:
      compile_image_exists: ${{ steps.check-image.outputs.exists }}
      requirements_modified: ${{ steps.check-requirements.outputs.modified }}
      check-dockerfile: ${{ steps.check-dockerfile.outputs.dockerfile_modified }}

    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        fetch-depth: 2

    - name: Check if compile-image exists on Docker Hub
      id: check-image
      run: |
        EXISTS=$(curl --silent --fail --head "https://hub.docker.com/v2/repositories/${{ secrets.DOCKER_HUB_USERNAME }}/telegram_media_downloader_compile/tags/latest" > /dev/null && echo "true" || echo "false")
        echo "exists=$EXISTS" >> $GITHUB_ENV
        echo "exists=$EXISTS" >> $GITHUB_OUTPUT

    - name: Check if requirements.txt has been modified
      id: check-requirements
      run: |
        MODIFIED=$(git diff --name-only HEAD~1 HEAD | grep -w 'requirements.txt' > /dev/null && echo "true" || echo "false")
        echo "modified=$MODIFIED" >> $GITHUB_ENV
        echo "modified=$MODIFIED" >> $GITHUB_OUTPUT

    - name: Check if Dockerfile has been modified
      id: check-dockerfile
      run: |
        DOCKERFILE_MODIFIED=$(git diff --name-only HEAD~1 HEAD | grep -w 'Dockerfile' > /dev/null && echo "true" || echo "false")
        echo "dockerfile_modified=$DOCKERFILE_MODIFIED" >> $GITHUB_ENV
        echo "dockerfile_modified=$DOCKERFILE_MODIFIED" >> $GITHUB_OUTPUT

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v2

    - name: Login to Docker Hub
      uses: docker/login-action@v2
      with:
        username: ${{ secrets.DOCKER_HUB_USERNAME }}
        password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}

    - name: Print Env
      id: env_aa
      run: |
        echo ${{ steps.check-image.outputs.exists }}
        echo ${{ steps.check-requirements.outputs.modified }}
        echo ${{ steps.check-dockerfile.outputs.dockerfile_modified }}

    - name: Build and push compile-image
      if: ${{ !(steps.check-image.outputs.exists == 'true' && steps.check-requirements.outputs.modified == 'false' && steps.check-dockerfile.outputs.dockerfile_modified == 'false') }}
      uses: docker/build-push-action@v4
      with:
        context: .
        push: true
        platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/arm/v6,linux/386,linux/ppc64le
        target: compile-image
        tags: ${{ secrets.DOCKER_HUB_USERNAME }}/telegram_media_downloader_compile:latest

    - name: Build and push runtime-image
      uses: docker/build-push-action@v4
      with:
        context: .
        push: true
        platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/arm/v6,linux/386,linux/ppc64le
        target: runtime-image
        tags: |
          ${{ secrets.DOCKER_HUB_USERNAME }}/telegram_media_downloader:latest
          ${{ secrets.DOCKER_HUB_USERNAME }}/telegram_media_downloader:${{ github.ref_name }}

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: Docker Publish
 
on:
  push:
    branches:
      - master
    tags:
      - 'v*'
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build-and-push:
    timeout-minutes: 30
    runs-on: latchkey-small
    outputs:
      compile_image_exists: ${{ steps.check-image.outputs.exists }}
      requirements_modified: ${{ steps.check-requirements.outputs.modified }}
      check-dockerfile: ${{ steps.check-dockerfile.outputs.dockerfile_modified }}
 
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        fetch-depth: 2
 
    - name: Check if compile-image exists on Docker Hub
      id: check-image
      run: |
        EXISTS=$(curl --silent --fail --head "https://hub.docker.com/v2/repositories/${{ secrets.DOCKER_HUB_USERNAME }}/telegram_media_downloader_compile/tags/latest" > /dev/null && echo "true" || echo "false")
        echo "exists=$EXISTS" >> $GITHUB_ENV
        echo "exists=$EXISTS" >> $GITHUB_OUTPUT
 
    - name: Check if requirements.txt has been modified
      id: check-requirements
      run: |
        MODIFIED=$(git diff --name-only HEAD~1 HEAD | grep -w 'requirements.txt' > /dev/null && echo "true" || echo "false")
        echo "modified=$MODIFIED" >> $GITHUB_ENV
        echo "modified=$MODIFIED" >> $GITHUB_OUTPUT
 
    - name: Check if Dockerfile has been modified
      id: check-dockerfile
      run: |
        DOCKERFILE_MODIFIED=$(git diff --name-only HEAD~1 HEAD | grep -w 'Dockerfile' > /dev/null && echo "true" || echo "false")
        echo "dockerfile_modified=$DOCKERFILE_MODIFIED" >> $GITHUB_ENV
        echo "dockerfile_modified=$DOCKERFILE_MODIFIED" >> $GITHUB_OUTPUT
 
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v2
 
    - name: Login to Docker Hub
      uses: docker/login-action@v2
      with:
        username: ${{ secrets.DOCKER_HUB_USERNAME }}
        password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
 
    - name: Print Env
      id: env_aa
      run: |
        echo ${{ steps.check-image.outputs.exists }}
        echo ${{ steps.check-requirements.outputs.modified }}
        echo ${{ steps.check-dockerfile.outputs.dockerfile_modified }}
 
    - name: Build and push compile-image
      if: ${{ !(steps.check-image.outputs.exists == 'true' && steps.check-requirements.outputs.modified == 'false' && steps.check-dockerfile.outputs.dockerfile_modified == 'false') }}
      uses: docker/build-push-action@v4
      with:
        context: .
        push: true
        platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/arm/v6,linux/386,linux/ppc64le
        target: compile-image
        tags: ${{ secrets.DOCKER_HUB_USERNAME }}/telegram_media_downloader_compile:latest
 
    - name: Build and push runtime-image
      uses: docker/build-push-action@v4
      with:
        context: .
        push: true
        platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/arm/v6,linux/386,linux/ppc64le
        target: runtime-image
        tags: |
          ${{ secrets.DOCKER_HUB_USERNAME }}/telegram_media_downloader:latest
          ${{ secrets.DOCKER_HUB_USERNAME }}/telegram_media_downloader:${{ github.ref_name }}

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 uses latchkey-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.

3 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.

Actions used in this workflow

actions/checkout docker/setup-buildx-action docker/login-action docker/build-push-action