How do I set up environment variables in GitHub Actions?

How do I set up environment variables in GitHub Actions?

You can set up environment variables in GitHub Actions by using the env key in your workflow YAML file.

Can you show me an example of how to do that?

Sure! Here's a simple example:

name: CI
on: [push]
jobs:
  build:
    runs-on: ubuntu-latest
    env:
      MY_VAR: 'Hello World'
    steps:
      - name: Print variable
        run: echo $MY_VAR

What if I want to use secrets instead of regular variables?

You can use GitHub Secrets by referencing them with secrets in your workflow:

env:
  MY_SECRET: ${{ secrets.MY_SECRET }}

Are there any limitations on the size of environment variables?

Yes, GitHub has a limit of 64 KB for the total size of all environment variables in a job.