Pathwise

Manuals / CI/CD Pipelines / Chapter 3

A · Foundations · beginner · Week 1–2 · Chapter 3 of 12

First GitHub Actions workflow

YAML workflow: on trigger, jobs, steps, runs-on. Install, test, fail loud on red.

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Step 1 of 4

Hello workflow

on: push, jobs.test, runs-on: ubuntu-latest, steps: checkout, setup, run tests.

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Example

name: CI
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: "20"
      - run: npm ci
      - run: npm test

Do this now

Add .github/workflows/ci.yml. Push. See green check on commit.

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Chapter learning outcomes
  • Workflow structure
  • Triggers
  • Jobs and steps
  • Action marketplace

Clear these before you leave

Side quest

Matrix awareness

Read docs on strategy.matrix. Sketch Node 18 + 20 matrix — optional implement.