publish.yml workflow (Fatal1ty/mashumaro)

The publish.yml workflow from Fatal1ty/mashumaro, explained and optimized by Latchkey.

What it does

This is the publish.yml workflow from the Fatal1ty/mashumaro repository, a real project running GitHub Actions. It is shown here with attribution under its Apache-2.0 license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

name: publish.yml
on:
  release:
    types:
      - published

jobs:
  pypi-publish:
    name: Upload release to PyPI
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write
    environment:
      name: pypi
      url: https://pypi.org/project/mashumaro/

    steps:
      - name: Checkout code
        uses: actions/checkout@v6

      - name: Set up Python 3.14
        uses: actions/setup-python@v6
        with:
          python-version: "3.14"

      - name: Install Poetry
        run: |
          curl -sSL https://install.python-poetry.org | python - -y

      - name: Install dependencies
        run: poetry install --no-interaction --no-root

      - name: Build
        run: poetry build

      - name: Publish to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1

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: publish.yml
on:
  release:
    types:
      - published
 
jobs:
  pypi-publish:
    timeout-minutes: 30
    name: Upload release to PyPI
    runs-on: latchkey-small
    permissions:
      contents: read
      id-token: write
    environment:
      name: pypi
      url: https://pypi.org/project/mashumaro/
 
    steps:
      - name: Checkout code
        uses: actions/checkout@v6
 
      - name: Set up Python 3.14
        uses: actions/setup-python@v6
        with:
          cache: 'pip'
          python-version: "3.14"
 
      - name: Install Poetry
        run: |
          curl -sSL https://install.python-poetry.org | python - -y
 
      - name: Install dependencies
        run: poetry install --no-interaction --no-root
 
      - name: Build
        run: poetry build
 
      - name: Publish to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1
 

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.
• 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
• Network fetches

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