Note: GitHub-hosted runners are not currently supported on GitHub Enterprise Server. You can see more information about planned future support on the GitHub public roadmap.
Introduction
This guide helps you migrate from Travis CI to GitHub Actions. It compares their concepts and syntax, describes the similarities, and demonstrates their different approaches to common tasks.
Before you start
Before starting your migration to GitHub Actions, it would be useful to become familiar with how it works:
- For a quick example that demonstrates a GitHub Actions job, see "Quickstart for GitHub Actions."
- To learn the essential GitHub Actions concepts, see "Introduction to GitHub Actions."
Comparing job execution
To give you control over when CI tasks are executed, a GitHub Actions workflow uses jobs that run in parallel by default. Each job contains steps that are executed in a sequence that you define. If you need to run setup and cleanup actions for a job, you can define steps in each job to perform these.
Key similarities
GitHub Actions and Travis CI share certain similarities, and understanding these ahead of time can help smooth the migration process.
Using YAML syntax
Travis CI and GitHub Actions both use YAML to create jobs and workflows, and these files are stored in the code's repository. For more information on how GitHub Actions uses YAML, see "Creating a workflow file."
Custom variables
Travis CI lets you set variables and share them between stages. Similarly, GitHub Actions lets you define variables for a workflows. For more information, see "Variables."
Default variables
Travis CI and GitHub Actions both include default environment variables that you can use in your YAML files. For GitHub Actions, you can see these listed in "Default environment variables."
Parallel job processing
Travis CI can use stages
to run jobs in parallel. Similarly, GitHub Actions runs jobs
in parallel. For more information, see "Creating dependent jobs."
Status badges
Travis CI and GitHub Actions both support status badges, which let you indicate whether a build is passing or failing. For more information, see "Adding a workflow status badge to your repository."
Using a matrix
Travis CI and GitHub Actions both support a matrix, allowing you to perform testing using combinations of operating systems and software packages. For more information, see "Using a matrix for your jobs."
Below is an example comparing the syntax for each system:
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Targeting specific branches
Travis CI and GitHub Actions both allow you to target your CI to a specific branch. For more information, see "Workflow syntax for GitHub Actions."
Below is an example of the syntax for each system:
Travis CI | GitHub Actions |
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Checking out submodules
Travis CI and GitHub Actions both allow you to control whether submodules are included in the repository clone.
Below is an example of the syntax for each system:
Travis CI | GitHub Actions |
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Using environment variables in a matrix
Travis CI and GitHub Actions can both add custom variables to a test matrix, which allows you to refer to the variable in a later step.
In GitHub Actions, you can use the include
key to add custom environment variables to a matrix. In this example, the matrix entries for node-version
are each configured to use different values for the site
and datacenter
environment variables. The Echo site details
step then uses env: ${{ matrix.env }}
to refer to the custom variables:
name: Node.js CI
on: [push]
jobs:
build:
runs-on: ubuntu-latest
strategy:
matrix:
include:
- node-version: 10.x
site: "prod"
datacenter: "site-a"
- node-version: 12.x
site: "dev"
datacenter: "site-b"
steps:
- name: Echo site details
env:
SITE: ${{ matrix.site }}
DATACENTER: ${{ matrix.datacenter }}
run: echo $SITE $DATACENTER
Key features in GitHub Actions
When migrating from Travis CI, consider the following key features in GitHub Actions:
Storing secrets
GitHub Actions allows you to store secrets and reference them in your jobs. GitHub Actions organizations can limit which repositories can access organization secrets. Environment protection rules can require manual approval for a workflow to access environment secrets. For more information, see "Encrypted secrets."
Sharing files between jobs and workflows
GitHub Actions includes integrated support for artifact storage, allowing you to share files between jobs in a workflow. You can also save the resulting files and share them with other workflows. For more information, see "Sharing data between jobs."
Hosting your own runners
If your jobs require specific hardware or software, GitHub Actions allows you to host your own runners and send your jobs to them for processing. GitHub Actions also lets you use policies to control how these runners are accessed, granting access at the organization or repository level. For more information, see "Hosting your own runners."
Using different languages in GitHub Actions
When working with different languages in GitHub Actions, you can create a step in your job to set up your language dependencies. For more information about working with a particular language, see the specific guide:
- Building and testing Node.js
- Building and testing Python
- Building and testing PowerShell
- Building and testing Java with Maven
- Building and testing Java with Gradle
- Building and testing Java with Ant
Executing scripts
GitHub Actions can use run
steps to run scripts or shell commands. To use a particular shell, you can specify the shell
type when providing the path to the script. For more information, see "Workflow syntax for GitHub Actions."
For example:
steps:
- name: Run build script
run: ./.github/scripts/build.sh
shell: bash
Error handling in GitHub Actions
When migrating to GitHub Actions, there are different approaches to error handling that you might need to be aware of.
Script error handling
GitHub Actions stops a job immediately if one of the steps returns an error code. For more information, see "Workflow syntax for GitHub Actions."
Job error handling
GitHub Actions uses if
conditionals to execute jobs or steps in certain situations. For example, you can run a step when another step results in a failure()
. For more information, see "Workflow syntax for GitHub Actions." You can also use continue-on-error
to prevent a workflow run from stopping when a job fails.
Migrating syntax for conditionals and expressions
To run jobs under conditional expressions, Travis CI and GitHub Actions share a similar if
condition syntax. GitHub Actions lets you use the if
conditional to prevent a job or step from running unless a condition is met. For more information, see "Expressions."
This example demonstrates how an if
conditional can control whether a step is executed:
jobs:
conditional:
runs-on: ubuntu-latest
steps:
- run: echo "This step runs with str equals 'ABC' and num equals 123"
if: env.str == 'ABC' && env.num == 123
Migrating phases to steps
Where Travis CI uses phases to run steps, GitHub Actions has steps which execute actions. You can find prebuilt actions in the GitHub Marketplace, or you can create your own actions. For more information, see "Building actions."
Below is an example of the syntax for each system:
Travis CI | GitHub Actions |
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Caching dependencies
Travis CI and GitHub Actions let you manually cache dependencies for later reuse.
GitHub Actions caching is only available for repositories hosted on GitHub.com or GitHub Enterprise Server 3.5 and later. For more information, see "Caching dependencies to speed up workflows."
Examples of common tasks
This section compares how GitHub Actions and Travis CI perform common tasks.
Configuring environment variables
You can create custom environment variables in a GitHub Actions job. For example:
Travis CI | GitHub Actions Workflow |
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Building with Node.js
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Next steps
To continue learning about the main features of GitHub Actions, see "Learn GitHub Actions."