buf.build workflow (prometheus/prometheus)

The buf.build workflow from prometheus/prometheus, explained and optimized by Latchkey.

CI health: C - fair

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

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Source: prometheus/prometheus.github/workflows/buf-lint.ymlLicense Apache-2.0View source

What it does

This is the buf.build workflow from the prometheus/prometheus 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

workflow (.yml)

name: buf.build
on:
  pull_request:
    paths:
      - ".github/workflows/buf-lint.yml"
      - "**.proto"
permissions:
  contents: read

jobs:
  buf:
    name: lint
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
        with:
          persist-credentials: false
      - uses: bufbuild/buf-setup-action@a47c93e0b1648d5651a065437926377d060baa99 # v1.50.0
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
      - uses: bufbuild/buf-lint-action@06f9dd823d873146471cfaaf108a993fe00e5325 # v1.1.1
        with:
          input: 'prompb'
      - uses: bufbuild/buf-breaking-action@c57b3d842a5c3f3b454756ef65305a50a587c5ba # v1.1.4
        with:
          input: 'prompb'
          against: 'https://github.com/prometheus/prometheus.git#branch=main,ref=HEAD,subdir=prompb'

The same workflow, on Latchkey

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

name: buf.build
on:
  pull_request:
    paths:
      - ".github/workflows/buf-lint.yml"
      - "**.proto"
permissions:
  contents: read
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  buf:
    timeout-minutes: 30
    name: lint
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
        with:
          persist-credentials: false
      - uses: bufbuild/buf-setup-action@a47c93e0b1648d5651a065437926377d060baa99 # v1.50.0
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
      - uses: bufbuild/buf-lint-action@06f9dd823d873146471cfaaf108a993fe00e5325 # v1.1.1
        with:
          input: 'prompb'
      - uses: bufbuild/buf-breaking-action@c57b3d842a5c3f3b454756ef65305a50a587c5ba # v1.1.4
        with:
          input: 'prompb'
          against: 'https://github.com/prometheus/prometheus.git#branch=main,ref=HEAD,subdir=prompb'

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.

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