How to Publish Actions to GitHub Actions Marketplace

We use this boilerplate and click on 'Use this template', create the repo and clone it locally.

Then we install dependencies using:

npm install

Then change the code in yml/index.js, install all missing dependencies and use ncc to build the bundle as we saw in Creating Custom Actions.

To the action yml, we also need to add the branding section:

outputs:
  # ...
runs:
  # ...
branding:
  # https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#brandingcolor
  color: purple
  # https://feathericons.com/
  icon: 'alert-octagon'

Then fill out README.md that explains how to use the Action.

Metadata syntax for GitHub Actions