CI workflow (sefcom/oxidizer)

The CI workflow from sefcom/oxidizer, explained and optimized by Latchkey.

CI health: C - fair

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Source: sefcom/oxidizer.github/workflows/ci.ymlLicense BSD-2-ClauseView source

What it does

This is the CI workflow from the sefcom/oxidizer repository, a real project running GitHub Actions. It is shown here with attribution under its BSD-2-Clause license.

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

The workflow

workflow (.yml)

name: CI

on:
  push:
    branches:
      - master
  pull_request:
  workflow_dispatch:
  merge_group:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}

jobs:
  ci:
    uses: angr/ci-settings/.github/workflows/angr-ci.yml@master

  smoketest:
    name: Test installation
    strategy:
      matrix:
        os: [windows-2022, macos-15-intel]
      fail-fast: false
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
      - uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1
        if: startsWith(runner.os, 'windows')
      - uses: astral-sh/setup-uv@61cb8a9741eeb8a550a1b8544337180c0fc8476b # v6
      - name: Sync dependencies
        run: uv sync -p 3.10
      - name: Collect tests
        run: uv run pytest --collect-only tests

  rust_check:
    name: Rust Check
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
      - uses: actions-rust-lang/setup-rust-toolchain@1780873c7b576612439a134613cc4cc74ce5538c # v1
        with:
          components: clippy, rustfmt
      - run: cargo clippy --all-targets --all-features -- -D warnings
      - run: cargo fmt --all -- --check

  rust_test:
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
      - uses: actions-rust-lang/setup-rust-toolchain@1780873c7b576612439a134613cc4cc74ce5538c # v1
      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v5
        with:
          python-version: "3.10"
      - run: cargo test --release

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: CI
 
on:
  push:
    branches:
      - master
  pull_request:
  workflow_dispatch:
  merge_group:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
 
jobs:
  ci:
    timeout-minutes: 30
    uses: angr/ci-settings/.github/workflows/angr-ci.yml@master
 
  smoketest:
    timeout-minutes: 30
    name: Test installation
    strategy:
      matrix:
        os: [windows-2022, macos-15-intel]
      fail-fast: false
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
      - uses: ilammy/msvc-dev-cmd@0b201ec74fa43914dc39ae48a89fd1d8cb592756 # v1
        if: startsWith(runner.os, 'windows')
      - uses: astral-sh/setup-uv@61cb8a9741eeb8a550a1b8544337180c0fc8476b # v6
      - name: Sync dependencies
        run: uv sync -p 3.10
      - name: Collect tests
        run: uv run pytest --collect-only tests
 
  rust_check:
    timeout-minutes: 30
    name: Rust Check
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
      - uses: actions-rust-lang/setup-rust-toolchain@1780873c7b576612439a134613cc4cc74ce5538c # v1
        with:
          components: clippy, rustfmt
      - run: cargo clippy --all-targets --all-features -- -D warnings
      - run: cargo fmt --all -- --check
 
  rust_test:
    timeout-minutes: 30
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4
      - uses: actions-rust-lang/setup-rust-toolchain@1780873c7b576612439a134613cc4cc74ce5538c # v1
      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v5
        with:
          cache: 'pip'
          python-version: "3.10"
      - run: cargo test --release

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

This workflow runs 4 jobs (7 with the matrix expanded) 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 astral-sh/setup-uv actions/setup-python