Migrate Travis CI to GitHub Actions for Ruby

remarkablemark
Feb 23 · 2 min read
GitHub Actions and Ruby
GitHub Actions + Ruby

This article goes over how to migrate from Travis CI to GitHub Actions for a Ruby project on GitHub.

Watch the YouTube video:

Travis CI

Given the .travis.yml:

GitHub Actions

First make the directory .github/workflows/:

mkdir -p .github/workflows/

Create .github/workflows/build.yml:

touch .github/workflows/build.yml

Add the workflow that runs a single job:

To test multiple versions of Ruby, update the workflow:

The Ruby workflow is inspired by the template.

Workflow

Here’s a breakdown of what each YAML field does.

name is the workflow name. It’s optional and you can name it whatever you like:

on is the event that triggers the workflow. In our example, git push triggers our workflow.

To add the pull_request event:

Which is the same thing as:

jobs are the jobs that the workflow runs. In our example, we have a single job named build:

runs-on is the environment that the workflow runs on. To specify an OS version:

strategy.matrix is the build matrix. In our example, we’re running a job for a single ruby version. To define jobs for multiple ruby versions:

steps are the tasks of a job. In our example, we’re using the GitHub Actions:

actions/checkout checks out the repository and ruby/setup-ruby sets up the Ruby environment:

steps.run runs the commands. Since setup-ruby installs bundler, it can be used to execute commands:

env sets the environment variables for the entire workflow or an individual step. See env and jobs.<job_id>.steps.env.

Although Travis CI sets default environment variables, we don’t have to set CI=true for our job since actions/checkout@v2 does it for us:

Resources

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