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GitHub Actions Cookbook

GitHub Actions Cookbook

By : Michael Kaufmann
4.8 (5)
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GitHub Actions Cookbook

GitHub Actions Cookbook

4.8 (5)
By: Michael Kaufmann

Overview of this book

Say goodbye to tedious tasks! GitHub Actions is a powerful workflow engine that automates everything in the GitHub ecosystem, letting you focus on what matters most. This book explains the GitHub Actions workflow syntax, the different kinds of actions, and how GitHub-hosted and self-hosted workflow runners work. You’ll get tips on how to author and debug GitHub Actions and workflows with Visual Studio Code (VS Code), run them locally, and leverage the power of GitHub Copilot. The book uses hands-on examples to walk you through real-world use cases that will help you automate the entire release process. You’ll cover everything, from automating the generation of release notes to building and testing your software and deploying securely to Azure, Amazon Web Services (AWS), or Google Cloud using OpenID Connect (OIDC), secrets, variables, environments, and approval checks. The book goes beyond CI/CD by demonstrating recipes to execute IssueOps and automate other repetitive tasks using the GitHub CLI, GitHub APIs and SDKs, and GitHub Token. You’ll learn how to build your own actions and reusable workflows to share building blocks with the community or within your organization. By the end of this GitHub book, you'll have gained the skills you need to automate tasks and work with remarkable efficiency and agility.
Table of Contents (10 chapters)
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Using caching in workflows

In this recipe, we will use caching to optimize the speed of workflows.

Getting ready

Switch to a new branch:

$ git switch -c cache-npm-packages

How to do it…

  1. Edit the .github/workflows/ci.yml file. After the setup-node action, add the following script to get the npm cache directory for the correct npm version and store it as an output variable:
    - name: Get npm cache directory
      id: npm-cache-dir
      run: echo "dir=$(npm config get cache)" >> "${GITHUB_OUTPUT}"
  2. Add the actual cache step right after that. Also, give it a name and create a key from the hash of the package-lock.json file:
    - uses: actions/cache@v3
      id: npm-cache
      with:
        path: ${{ steps.npm-cache-dir.outputs.dir }}
        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
        restore-keys: |
        ...
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GitHub Actions Cookbook
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