Release workflow (developmentseed/lonboard)

The Release workflow from developmentseed/lonboard, explained and optimized by Latchkey.

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Source: developmentseed/lonboard.github/workflows/release.ymlLicense MITView source

What it does

This is the Release workflow from the developmentseed/lonboard 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: Release

# Only run on new tags starting with `v`
on:
  push:
    tags:
      - "v*"

jobs:
  build:
    name: Build dist
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v7

      - uses: actions/setup-python@v6
        name: Install Python
        with:
          python-version: "3.11"

      - uses: pnpm/action-setup@v6

      # Note: this should stay synced with the volta-pinned version in
      # package.json
      - uses: actions/setup-node@v6
        with:
          node-version: "22"
          cache: "pnpm"

      - name: Install JS dependencies
        run: pnpm install --frozen-lockfile

      - name: Build JS bundle
        run: pnpm run build

      - name: Build dist
        run: |
          python -m pip install -U build
          python -m build

      - name: Ensure JS files included
        run: |
          # If no files with path lonboard/static, fail
          unzip -l dist/*.whl | grep "lonboard/static" || exit 1

      - uses: actions/upload-artifact@v7
        with:
          path: ./dist/

  upload_pypi:
    name: Upload release to PyPI
    needs: [build]
    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
    runs-on: ubuntu-latest
    environment:
      # Note: this environment must be configured in the repo settings
      name: pypi-release
      url: https://pypi.org/p/lonboard
    permissions:
      id-token: write # IMPORTANT: this permission is mandatory for trusted publishing
    steps:
      - uses: actions/download-artifact@v8
        with:
          name: artifact
          path: dist
          merge-multiple: true

      - name: Publish package distributions to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1
        # Optional: test upload to Test PyPI instead of production PyPI
        # with:
        #   repository-url: https://test.pypi.org/legacy/

The same workflow, on Latchkey

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

name: Release
 
# Only run on new tags starting with `v`
on:
  push:
    tags:
      - "v*"
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    name: Build dist
    runs-on: latchkey-small
 
    steps:
      - uses: actions/checkout@v7
 
      - uses: actions/setup-python@v6
        name: Install Python
        with:
          python-version: "3.11"
 
      - uses: pnpm/action-setup@v6
 
      # Note: this should stay synced with the volta-pinned version in
      # package.json
      - uses: actions/setup-node@v6
        with:
          node-version: "22"
          cache: "pnpm"
 
      - name: Install JS dependencies
        run: pnpm install --frozen-lockfile
 
      - name: Build JS bundle
        run: pnpm run build
 
      - name: Build dist
        run: |
          python -m pip install -U build
          python -m build
 
      - name: Ensure JS files included
        run: |
          # If no files with path lonboard/static, fail
          unzip -l dist/*.whl | grep "lonboard/static" || exit 1
 
      - uses: actions/upload-artifact@v7
        with:
          path: ./dist/
 
  upload_pypi:
    timeout-minutes: 30
    name: Upload release to PyPI
    needs: [build]
    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
    runs-on: latchkey-small
    environment:
      # Note: this environment must be configured in the repo settings
      name: pypi-release
      url: https://pypi.org/p/lonboard
    permissions:
      id-token: write # IMPORTANT: this permission is mandatory for trusted publishing
    steps:
      - uses: actions/download-artifact@v8
        with:
          name: artifact
          path: dist
          merge-multiple: true
 
      - name: Publish package distributions to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1
        # Optional: test upload to Test PyPI instead of production PyPI
        # with:
        #   repository-url: https://test.pypi.org/legacy/

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.

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 pnpm/action-setup actions/setup-node actions/upload-artifact actions/download-artifact