Release workflow (twardoch/fonttools-opentype-feature-freezer)

The Release workflow from twardoch/fonttools-opentype-feature-freezer, explained and optimized by Latchkey.

What it does

This is the Release workflow from the twardoch/fonttools-opentype-feature-freezer 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: Release

on:
  push:
    tags: ["v*"]

jobs:
  build:
    name: Build distributions
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install uv
        uses: astral-sh/setup-uv@v5
        with:
          python-version: "3.12"

      - name: Build sdist and wheel
        run: uv build

      - uses: actions/upload-artifact@v4
        with:
          name: dist
          path: dist/

  publish:
    name: Publish to PyPI
    needs: build
    runs-on: ubuntu-latest
    environment: pypi
    permissions:
      id-token: write # trusted publishing (OIDC), no API token needed
    steps:
      - uses: actions/download-artifact@v4
        with:
          name: dist
          path: dist/

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

The same workflow, on Latchkey

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

name: Release
 
on:
  push:
    tags: ["v*"]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    name: Build distributions
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
 
      - name: Install uv
        uses: astral-sh/setup-uv@v5
        with:
          python-version: "3.12"
 
      - name: Build sdist and wheel
        run: uv build
 
      - uses: actions/upload-artifact@v4
        with:
          name: dist
          path: dist/
 
  publish:
    timeout-minutes: 30
    name: Publish to PyPI
    needs: build
    runs-on: latchkey-small
    environment: pypi
    permissions:
      id-token: write # trusted publishing (OIDC), no API token needed
    steps:
      - uses: actions/download-artifact@v4
        with:
          name: dist
          path: dist/
 
      - name: Publish
        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.
• 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.

2 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.

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