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This repository was archived by the owner on Sep 1, 2022. It is now read-only.
This repository powers the Learning Lab course [_GitHub Actions: Writing JavaScript actions_](https://lab.github.com/githubtraining/github-actions:-writing-javascript-actions/).
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Every Learning Lab course is made up of:
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- a [course repository](https://github.com/githubtraining/write-javascript-actions), and
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- a [template repository](https://github.com/githubtraining/write-javascript-actions-template)
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The course repository is written in YAML and Markdown. The template repository could be written in any language that supports the learning objectives.
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For more information on the goals of this course, check out the [`course-details.md`](course-details.md).
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## Contribute
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See something we could improve? Check out the contributing guide in the [community contributors repository](https://github.com/githubtraining/community-contributors/blob/master/CONTRIBUTING.md) for more information on the types of contributions we :heart: and instructions.
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We :heart: our community and take great care to ensure it is fun, safe and rewarding. Please review our [Code of Conduct](https://github.com/githubtraining/community-contributors/blob/master/CODE_OF_CONDUCT.md) for community expectations and guidelines for reporting concerns.
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## License
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All Learning Lab course repositories are licensed under [CC-BY-4.0](../LICENSE) (c) 2019 GitHub, Inc. The template repositories associated with each course may have different licenses.
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When using the GitHub logos, be sure to follow the [GitHub logo guidelines](https://github.com/logos)
[GitHub Actions](https://github.com/features/actions) is a powerful platform that empowers your team to go from code to cloud all from the comfort of your own repositories.
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Over the duration of this course, approximately 1 hour, you will learn the skills needed to begin using and customizing GitHub Actions in your unique workflow scenarios.
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Over the duration of this course, approximately 1 hour, you will learn the skills needed to begin using and customizing GitHub Actions to fit your unique workflow scenarios.
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**Prerequisites**
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## What you'll learn
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We will be using Node.js to build our action and GitHub to consume our action. This presents us with a hybrid environment, the Node.js runtime environment and the virtual machine used by GitHub Actions, that you may not be used to if you've taken other Learning Lab courses.
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In this course you will learn how to:
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Before we can get started there are a few things you need to setup on your **local machine**
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- Consume actions within a workflow file
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- Create custom JavaScript based actions
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- Publish your newly created action to the marketplace
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1. Install [Node.js](https://nodejs.org/en/) for your operating system.
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2. Ensure you have a text editor installed. I'll be using Visual Studio Code, and although you are free to use your editor of choice you should be aware that using a different editor will result in your screen not matching my examples. Here are some editor options for you:
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1.[Visual Studio Code](https://code.visualstudio.com/)**(recommended)**
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2.[Atom](https://atom.io/)
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3.[Sublime Text](https://www.sublimetext.com/)
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3. Lastly, you're going to need a local installation of [Git](https://git-scm.com/) so that you can interact with this repository as you write code.
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You'll know the answers to questions like:
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- What is a workflow?
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- What are actions?
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- What is action metadata?
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- What are GitHub Actions capable of?
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## What you'll build
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In this course you will build three actions that each accomplish different tasks designed to demonstrate the flexibility of creating and consuming JavaScript Based Actions.
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First, you will start with the traditional "Hello World!" program which will teach you where to find the output of a workflow run. You will then modify this "Hello World!" action to accept `input` parameters which allow the action to be more dynamic.
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Second, you will write an action that call upon an external API to retrieve a fact about cats and prints it to the workflows output. You will then modify this cat fact action to set the retrieved data as `output` for another action in the workflow to consume.
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Lastly, you will write a third action that will open an issue in your repository making the cat fact available to everyone. You will learn how to use the `output` of previous actions as `input` for current actions in this step.
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## Prerequisites
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We first recommend taking the following courses:
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-[Hello, GitHub Actions!](https://lab.github.com/github/hello-github-actions!) to learn the basics of how GitHub Actions work
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-[GitHub Actions: Continuous Integration](https://lab.github.com/githubtraining/github-actions:-continuous-integration) to dive deeper into a workflow file
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## Projects used
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This makes use of the following open source projects. Consider exploring these repos and maybe even making contributions!
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-[GitHub Actions Toolkit](https://github.com/actions/toolkit), a multipurpose JavaScript library for writing actions
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