Linting workflow (prometheus-community/windows_exporter)

The Linting workflow from prometheus-community/windows_exporter, explained and optimized by Latchkey.

CI health: C - fair

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Source: prometheus-community/windows_exporter.github/workflows/lint.ymlLicense MITView source

What it does

This is the Linting workflow from the prometheus-community/windows_exporter 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: Linting

# Trigger on pull requests and pushes to master branch where Go-related files
# have been changed.
on:
  push:
    branches:
      - master
      - next
      - main
      - "0.*"
      - "1.*"
  pull_request:

env:
  VERSION_PROMU: '0.14.0'
  PROMTOOL_VER: '2.43.0'

jobs:
  test:
    runs-on: windows-2025
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
        with:
          # renovate: golang=go
          go-version: '1.26.4'

      - name: Test
        run: make test

      - name: Install e2e deps
        run: |
          Invoke-WebRequest -Uri https://github.com/prometheus/promu/releases/download/v$($Env:VERSION_PROMU)/promu-$($Env:VERSION_PROMU).windows-amd64.zip -OutFile promu-$($Env:VERSION_PROMU).windows-amd64.zip
          Expand-Archive -Path promu-$($Env:VERSION_PROMU).windows-amd64.zip -DestinationPath .
          Copy-Item -Path promu-$($Env:VERSION_PROMU).windows-amd64\promu.exe -Destination "$(go env GOPATH)\bin"

          # GOPATH\bin dir must be appended to PATH else the `promu` command won't be found
          echo "$(go env GOPATH)\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append

      - name: e2e Test
        run: make e2e-test

  promtool:
    runs-on: windows-2025
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
        with:
          # renovate: golang=go
          go-version: '1.26.4'

      - name: Install promtool
        run: |
          Invoke-WebRequest -Uri https://github.com/prometheus/prometheus/releases/download/v$($Env:PROMTOOL_VER)/prometheus-$($Env:PROMTOOL_VER).windows-amd64.zip -OutFile prometheus-$($Env:PROMTOOL_VER).windows-amd64.zip
          Expand-Archive -Path prometheus-$($Env:PROMTOOL_VER).windows-amd64.zip -DestinationPath .
          Copy-Item -Path prometheus-$($Env:PROMTOOL_VER).windows-amd64\promtool.exe -Destination "$(go env GOPATH)\bin"

          Invoke-WebRequest -Uri https://github.com/prometheus/promu/releases/download/v$($Env:VERSION_PROMU)/promu-$($Env:VERSION_PROMU).windows-amd64.zip -OutFile promu-$($Env:VERSION_PROMU).windows-amd64.zip
          Expand-Archive -Path promu-$($Env:VERSION_PROMU).windows-amd64.zip -DestinationPath .
          Copy-Item -Path promu-$($Env:VERSION_PROMU).windows-amd64\promu.exe -Destination "$(go env GOPATH)\bin"

          # GOPATH\bin dir must be appended to PATH else the `promu` command won't be found
          echo "$(go env GOPATH)\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append

      - name: Promtool
        run: make promtool

      - name: Upload windows_exporter.exe
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: windows_exporter.amd64.exe
          path: 'windows_exporter.exe'
          retention-days: 7
          if-no-files-found: error

  lint:
    runs-on: windows-2025
    steps:
      # `gofmt` linter run by golangci-lint fails on CRLF line endings (the default for Windows)
      - name: Set git to use LF
        run: |
          git config --global core.autocrlf false
          git config --global core.eol lf

      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
        with:
          # renovate: golang=go
          go-version: '1.26.4'

      - name: golangci-lint
        uses: golangci/golangci-lint-action@ba0d7d2ec06a0ea1cb5fa41b2e4a3ab91d21278a # v9.3.0
        with:
          # renovate: github=golangci/golangci-lint
          version: v2.12.2
          args: "--max-same-issues=0"

The same workflow, on Latchkey

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

name: Linting
 
# Trigger on pull requests and pushes to master branch where Go-related files
# have been changed.
on:
  push:
    branches:
      - master
      - next
      - main
      - "0.*"
      - "1.*"
  pull_request:
 
env:
  VERSION_PROMU: '0.14.0'
  PROMTOOL_VER: '2.43.0'
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  test:
    timeout-minutes: 30
    runs-on: windows-2025
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
        with:
          # renovate: golang=go
          go-version: '1.26.4'
 
      - name: Test
        run: make test
 
      - name: Install e2e deps
        run: |
          Invoke-WebRequest -Uri https://github.com/prometheus/promu/releases/download/v$($Env:VERSION_PROMU)/promu-$($Env:VERSION_PROMU).windows-amd64.zip -OutFile promu-$($Env:VERSION_PROMU).windows-amd64.zip
          Expand-Archive -Path promu-$($Env:VERSION_PROMU).windows-amd64.zip -DestinationPath .
          Copy-Item -Path promu-$($Env:VERSION_PROMU).windows-amd64\promu.exe -Destination "$(go env GOPATH)\bin"
 
          # GOPATH\bin dir must be appended to PATH else the `promu` command won't be found
          echo "$(go env GOPATH)\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
      - name: e2e Test
        run: make e2e-test
 
  promtool:
    timeout-minutes: 30
    runs-on: windows-2025
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
        with:
          # renovate: golang=go
          go-version: '1.26.4'
 
      - name: Install promtool
        run: |
          Invoke-WebRequest -Uri https://github.com/prometheus/prometheus/releases/download/v$($Env:PROMTOOL_VER)/prometheus-$($Env:PROMTOOL_VER).windows-amd64.zip -OutFile prometheus-$($Env:PROMTOOL_VER).windows-amd64.zip
          Expand-Archive -Path prometheus-$($Env:PROMTOOL_VER).windows-amd64.zip -DestinationPath .
          Copy-Item -Path prometheus-$($Env:PROMTOOL_VER).windows-amd64\promtool.exe -Destination "$(go env GOPATH)\bin"
 
          Invoke-WebRequest -Uri https://github.com/prometheus/promu/releases/download/v$($Env:VERSION_PROMU)/promu-$($Env:VERSION_PROMU).windows-amd64.zip -OutFile promu-$($Env:VERSION_PROMU).windows-amd64.zip
          Expand-Archive -Path promu-$($Env:VERSION_PROMU).windows-amd64.zip -DestinationPath .
          Copy-Item -Path promu-$($Env:VERSION_PROMU).windows-amd64\promu.exe -Destination "$(go env GOPATH)\bin"
 
          # GOPATH\bin dir must be appended to PATH else the `promu` command won't be found
          echo "$(go env GOPATH)\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
      - name: Promtool
        run: make promtool
 
      - name: Upload windows_exporter.exe
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: windows_exporter.amd64.exe
          path: 'windows_exporter.exe'
          retention-days: 7
          if-no-files-found: error
 
  lint:
    timeout-minutes: 30
    runs-on: windows-2025
    steps:
      # `gofmt` linter run by golangci-lint fails on CRLF line endings (the default for Windows)
      - name: Set git to use LF
        run: |
          git config --global core.autocrlf false
          git config --global core.eol lf
 
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
      - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0
        with:
          # renovate: golang=go
          go-version: '1.26.4'
 
      - name: golangci-lint
        uses: golangci/golangci-lint-action@ba0d7d2ec06a0ea1cb5fa41b2e4a3ab91d21278a # v9.3.0
        with:
          # renovate: github=golangci/golangci-lint
          version: v2.12.2
          args: "--max-same-issues=0"

What changed

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.

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:

End-to-end and browser tests

This workflow runs 3 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-go actions/upload-artifact golangci/golangci-lint-action