Build workflow (kivymd/KivyMD)

The Build workflow from kivymd/KivyMD, explained and optimized by Latchkey.

CI health: F - at risk

Point runs-on at Latchkey and get caching, run de-duplication, job timeouts, SHA-pinned actions, self-healing for flaky steps, and up to 58% lower cost, applied automatically.

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Source: kivymd/KivyMD.github/workflows/build.ymlLicense MITView source

What it does

This is the Build workflow from the kivymd/KivyMD 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: Build

on:
  push:
    branches-ignore:
      - data
      - gh-pages
    tags:
      - '**'
  pull_request:
    branches-ignore:
      - data
      - gh-pages
  workflow_dispatch:

jobs:
  build:
    name: Build [${{ matrix.python-version }} | ${{ matrix.os }}]
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest]
        python-version: ['3.13']
    steps:
      - name: Checkout source
        uses: actions/checkout@v4

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}

      - name: Install build tools
        run: |
          python -m pip install --upgrade pip
          pip install build

      - name: Build with `python -m build`
        run: |
          python -m build --wheel --sdist

      - name: Upload merged artifacts per OS
        uses: actions/upload-artifact@v4
        with:
          name: dist-${{ matrix.os }}
          path: dist/
          if-no-files-found: error

  deploy:
    name: Publish to PyPI
    runs-on: ubuntu-latest
    needs: build
    if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')

    steps:
      - name: Checkout source
        uses: actions/checkout@v4

      - name: Download all artifacts
        uses: actions/download-artifact@v4
        with:
          path: dist

      - name: Publish to PyPI
        uses: pypa/gh-action-pypi-publish@v1.13.0
        with:
          user: __token__
          password: ${{ secrets.PYPI_TOKEN }}
          packages_dir: dist/

The same workflow, on Latchkey

Estimated ~20% faster on cache hits, plus fewer wasted runs and a safer supply chain. Added and changed lines are highlighted.

name: Build
 
on:
  push:
    branches-ignore:
      - data
      - gh-pages
    tags:
      - '**'
  pull_request:
    branches-ignore:
      - data
      - gh-pages
  workflow_dispatch:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    name: Build [${{ matrix.python-version }} | ${{ matrix.os }}]
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest]
        python-version: ['3.13']
    steps:
      - name: Checkout source
        uses: actions/checkout@v4
 
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5
        with:
          cache: 'pip'
          python-version: ${{ matrix.python-version }}
 
      - name: Install build tools
        run: |
          python -m pip install --upgrade pip
          pip install build
 
      - name: Build with `python -m build`
        run: |
          python -m build --wheel --sdist
 
      - name: Upload merged artifacts per OS
        uses: actions/upload-artifact@v4
        with:
          name: dist-${{ matrix.os }}
          path: dist/
          if-no-files-found: error
 
  deploy:
    timeout-minutes: 30
    name: Publish to PyPI
    runs-on: latchkey-small
    needs: build
    if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
 
    steps:
      - name: Checkout source
        uses: actions/checkout@v4
 
      - name: Download all artifacts
        uses: actions/download-artifact@v4
        with:
          path: dist
 
      - name: Publish to PyPI
        uses: pypa/gh-action-pypi-publish@v1.13.0
        with:
          user: __token__
          password: ${{ secrets.PYPI_TOKEN }}
          packages_dir: dist/

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.
Cache dependency installs on the setup step so they are served from cache.
Add a job timeout so a hung step cannot burn hours of runner time.

1 third-party action is referenced by a movable tag. Pin it 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:

Dependency installs

This workflow runs 2 jobs 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 actions/setup-python actions/upload-artifact actions/download-artifact