Helaian Rujukan GitHub Actions
Rujukan GitHub Actions yang boleh dicari dan dicetak: trigger workflow, job, step, expression, matrix, caching dan reusable workflow. Percuma.
Workflow skeleton & triggers
12.github/workflows/ci.yml
Where workflow files live
name: CI
Workflow display name
on: push
Run on every push
on: { push: { branches: [main] } }
Only pushes to main
on: { push: { tags: ["v*"] } }
Run on version tags
on: pull_request
Run on PR open/update
on: { pull_request: { paths: ["src/**"] } }
Only when paths change
on: { schedule: [{ cron: "0 6 * * 1" }] }
Cron: Mondays 06:00 UTC
on: workflow_dispatch
Manual "Run workflow" button
workflow_dispatch: { inputs: { env: { type: choice, options: [dev, prod] } } }
Manual run with inputs
on: { release: { types: [published] } }
Run when a release ships
on: workflow_call
Make workflow reusable
Jobs & runners
12jobs: { build: { runs-on: ubuntu-latest } }
Define a job and its runner
runs-on: [macos-latest / windows-latest]
Other hosted runner images
runs-on: [self-hosted, linux, x64]
Route to self-hosted by labels
needs: build
Run after another job
needs: [lint, test]
Wait for several jobs
if: github.ref == 'refs/heads/main'
Conditional job
container: node:22
Run job inside a Docker image
services: { redis: { image: redis:7, ports: ["6379:6379"] } }
Sidecar service container
outputs: { sha: ${{ steps.vars.outputs.sha }} }
Expose job outputs
needs.build.outputs.sha
Read another job's output
defaults: { run: { working-directory: app } }
Default dir for run steps
strategy: { fail-fast: false }
Keep matrix jobs running
Steps & popular actions
14- uses: actions/checkout@v4
Clone the repository
- uses: actions/checkout@v4 with fetch-depth: 0
Full history (tags, blame)
- uses: actions/setup-node@v4 with node-version: 22
Install Node.js
- uses: actions/setup-python@v5 with python-version: "3.12"
Install Python
- uses: shivammathur/setup-php@v2 with php-version: "8.3"
Install PHP
- run: npm ci && npm test
Run shell commands
- run: | (multiline)
Multi-line script step
- name: Build
Readable step name in logs
- id: vars
Reference step outputs later
echo "sha=$(git rev-parse --short HEAD)" >> "$GITHUB_OUTPUT"
Set a step output
echo "PATH_EXTRA=/opt/bin" >> "$GITHUB_ENV"
Set env for later steps
- uses: actions/upload-artifact@v4
Save build outputs
- uses: actions/download-artifact@v4
Fetch artifacts in later jobs
continue-on-error: true
Don't fail the job on error
Expressions & contexts
14${{ github.ref }}
Full ref, e.g. refs/heads/main
${{ github.ref_name }}
Branch or tag name only
${{ github.sha }}
Commit SHA being built
${{ github.event_name }}
Trigger: push, pull_request...
${{ github.actor }}
User who triggered the run
${{ github.repository }}
owner/repo string
${{ github.event.pull_request.number }}
Dig into the event payload
${{ secrets.API_KEY }}
Encrypted repo/org secret
${{ vars.SITE_URL }}
Non-secret config variable
${{ env.NODE_ENV }}
Environment variable
${{ runner.os }} / ${{ runner.temp }}
Runner OS and temp dir
${{ steps.vars.outputs.sha }}
Output of an earlier step
contains(), startsWith(), format()
Expression helper functions
GITHUB_TOKEN
Auto-provided per-run token
Conditionals & matrix
11if: success() / failure() / always()
Run based on prior status
if: cancelled()
Only when the run is cancelled
if: github.event_name == 'push'
Trigger-specific step
if: startsWith(github.ref, 'refs/tags/')
Only for tag builds
if: contains(github.event.head_commit.message, '[skip e2e]')
Commit-message switches
strategy: { matrix: { node: [20, 22] } }
One job per matrix value
matrix: { os: [ubuntu-latest, macos-latest], node: [20, 22] }
Cross-product matrix (4 jobs)
${{ matrix.node }}
Use the matrix value
matrix: { include: [{ os: ubuntu-latest, node: 23, experimental: true }] }
Add extra combos
matrix: { exclude: [{ os: macos-latest, node: 20 }] }
Drop combos
max-parallel: 2
Throttle concurrent matrix jobs
Caching & artifacts
11- uses: actions/cache@v4
Generic dependency cache
key: npm-${{ hashFiles('package-lock.json') }}
Cache key from lockfile hash
restore-keys: | npm-
Fallback prefix on miss
path: ~/.npm
What directory to cache
setup-node@v4 with cache: npm
Built-in npm cache (easiest)
setup-python@v5 with cache: pip
Built-in pip cache
upload-artifact@v4 with name/path
Store files for download
upload-artifact: retention-days: 5
Auto-delete artifacts
download-artifact@v4 (no name)
Download all artifacts
if-no-files-found: error
Fail if the path is empty
Cache limit: 10 GB per repo
Old caches get evicted
Environments & permissions
11permissions: { contents: read }
Least-privilege GITHUB_TOKEN
permissions: { contents: write, pull-requests: write }
Allow pushes + PR comments
permissions: { id-token: write }
OIDC for cloud auth (no keys)
environment: production
Use a deploy environment
environment: { name: prod, url: https://app.example.com }
Link shown on the run
Environment protection rules
Required reviewers, wait timer
env: { NODE_ENV: production }
Env at workflow/job/step level
secrets.GITHUB_TOKEN
Scoped to the current repo
Settings > Secrets and variables > Actions
Where to define secrets
Org secrets with repo allowlists
Share secrets across repos
pull_request_target: use with care
Runs with secrets on fork PRs
Reusable workflows & composite actions
11on: { workflow_call: { inputs: ..., secrets: ... } }
Declare a reusable workflow
jobs: { ci: { uses: org/repo/.github/workflows/ci.yml@v1 } }
Call a reusable workflow
uses: ./.github/workflows/ci.yml
Call one from the same repo
with: { node-version: 22 }
Pass inputs to the callee
secrets: inherit
Forward all caller secrets
${{ inputs.node-version }}
Read inputs in the callee
action.yml with runs: { using: composite }
Define a composite action
steps: - run: ... shell: bash
Composite steps need shell:
uses: ./.github/actions/setup
Use a local composite action
inputs/outputs in action.yml
Action interface definition
Nesting limit: 4 levels of reusable calls
Plan the call depth
Concurrency & timeouts
9concurrency: { group: deploy, cancel-in-progress: true }
Kill superseded runs
group: ${{ github.workflow }}-${{ github.ref }}
One run per branch
cancel-in-progress: false
Queue instead of cancel
timeout-minutes: 15 (job level)
Kill runaway jobs (default 360)
timeout-minutes: 5 (step level)
Cap a single step
retry via nick-fields/retry@v3
Retry flaky steps
jobs.<id>.strategy.max-parallel
Limit parallel matrix legs
if: always() on cleanup steps
Cleanup even after failure
Scheduled runs can be delayed/skipped
Cron is best-effort, not exact
Common recipes
12on: push: tags: ["v*"] + softprops/action-gh-release@v2
Release on version tag
on: push: paths: ["apps/api/**"]
Monorepo: build only what changed
dorny/paths-filter@v3
Per-job change detection
peaceiris/actions-gh-pages@v4
Deploy static site to Pages
docker/build-push-action@v6
Build and push Docker images
docker/login-action@v3 with ghcr.io
Log in to GitHub registry
aws-actions/configure-aws-credentials@v4 (OIDC)
Keyless AWS deploys
appleboy/ssh-action@v1
Run commands on a server
codecov/codecov-action@v4
Upload coverage reports
github/codeql-action
Code scanning / security
dependabot.yml + auto-merge workflow
Auto-update dependencies
schedule + stale action
Auto-close stale issues
Debugging
12Secret ACTIONS_STEP_DEBUG = true
Verbose step debug logs
Secret ACTIONS_RUNNER_DEBUG = true
Runner diagnostic logs
Re-run jobs > Enable debug logging
One-off debug re-run
act
Run workflows locally in Docker
act -j build
Run a single job locally
act -s GITHUB_TOKEN=$(gh auth token)
Pass secrets to act
echo "::debug::message"
Emit a debug log line
echo "::error file=app.js,line=1::Oops"
Annotate code with errors
echo "::group::Install" ... "::endgroup::"
Collapsible log sections
$GITHUB_STEP_SUMMARY
Write Markdown run summary
mxschmitt/action-tmate@v3
SSH into a live runner
cat "$GITHUB_EVENT_PATH"
Inspect the raw event JSON
gh CLI for Actions
13gh run list
Recent workflow runs
gh run list --workflow ci.yml
Runs for one workflow
gh run watch
Live-follow the latest run
gh run view 123456 --log
Full logs of a run
gh run view --log-failed
Only the failed steps' logs
gh run rerun 123456 --failed
Re-run failed jobs only
gh run cancel 123456
Cancel a run
gh run download 123456
Download run artifacts
gh workflow list
List workflows in the repo
gh workflow run ci.yml -f env=prod
Trigger workflow_dispatch
gh workflow disable ci.yml
Disable a workflow
gh secret set API_KEY
Set a repo secret
gh cache list / gh cache delete
Inspect and prune caches
Tiada entri sepadan dengan “:q”.
Mengenai Helaian Rujukan GitHub Actions
Helaian rujukan GitHub Actions ini memampatkan YAML workflow ke dalam satu halaman yang boleh dicari: rangka workflow dan trigger, job dan runner, step dan action popular, expression dan context, conditional dan matrix build, caching dan artifact, environment dan permission, reusable workflow dan composite action, concurrency dan timeout, resipi biasa, debugging, serta arahan gh CLI untuk Actions.
Fail workflow kebanyakannya sintaks yang perlu diingati (trigger mana yang aktif pada satu tag, cara merujuk satu secret, expression if yang melangkau satu step pada fork, corak kunci cache untuk satu lockfile), jadi setiap baris menunjukkan serpihan YAML dengan penjelasan satu baris.
Helaian ini percuma dan di sisi klien: tapis baris secara langsung dengan kotak carian, lompat antara bahagian dengan senarai kandungan yang melekat, salin sebarang serpihan dengan satu klik dan cetak halaman sebagai rujukan meja.
Cara menggunakan Helaian Rujukan GitHub Actions
- Imbas bahagiannya, dari Workflow skeleton & triggers dan Jobs & runners hingga gh CLI for Actions.
- Cari kata kunci seperti matrix, secrets atau cache untuk menapis setiap baris secara langsung.
- Lompat ke Common recipes untuk job build, test atau deploy yang sedia dibuat untuk disesuaikan.
- Klik sesuatu serpihan YAML atau ikon salinnya untuk menyalinnya ke dalam fail workflow anda.
- Cetak helaian ini untuk rujukan GitHub Actions luar talian.
Soalan lazim
Dua belas bahagian: rangka workflow dan trigger, job dan runner, step dan action popular, expression dan context, conditional dan matrix, caching dan artifact, environment dan permission, reusable dan composite workflow, concurrency dan timeout, resipi biasa, debugging, serta gh CLI.
Ya: push, pull_request, schedule dengan cron, workflow_dispatch dengan input, release, serta penapis path dan branch yang mengecilkan setiap satu.
Kedua-duanya mempunyai bahagiannya sendiri: strategi matrix dengan include, exclude dan fail-fast, serta actions/cache dengan kunci berasaskan lockfile dan restore-keys.
Ya. Klik mana-mana baris atau ikon salinnya dan serpihan itu mendarat pada papan keratan anda dengan pengesahan ringkas.
Ya, sepenuhnya percuma: boleh dicari, boleh dicetak dan dipaparkan dalam pelayar anda tanpa pendaftaran.
Carian popular
github actions cheat sheet
github actions workflow syntax
github actions yaml example
github actions matrix build
github actions cache
workflow triggers list
reusable workflows github
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