Travis CI: .travis.yml Configuration for Go

Travis CI is a continuous integration service used to build and test software projects hosted on GitHub. Here's how you can set up a .travis.yml file to configure Travis CI for a Go project.

Basic Configuration

A basic .travis.yml file for a Go project might look like this:

yaml
language: go

go:
  - 1.19.x
  - 1.20.x

env:
  - GO111MODULE=on

script:
  - go test -v ./...

Explanation

1. language: go: Specifies the programming language as Go.

2. go:: Lists the versions of Go to be tested. In this example, it includes two versions: 1.19.x and 1.20.x.

3. env:: Sets environment variables. In this case, GO111MODULE=on ensures that Go modules are enabled.

4. script:: Defines the commands to run as part of the build process. Here, it runs go test -v ./..., which performs verbose testing on all packages.

Additional Configuration Options

Depending on your project's requirements, you might need a more complex configuration.

1. Setting Up Dependencies

If your project has dependencies that need to be installed, you can use the before_install and install sections:

yaml
before_install:
  - go mod tidy
  - go mod vendor

2. Running Linting Tools

You can also include commands to run linting tools like golint:

yaml
install:
  - go get -u golang.org/x/lint/golint
  - go get -t -v ./...
  - go install

3. Deploying Your Application

To deploy your application after a successful build, you can use the deploy section:

yaml
deploy:
  provider: script
  script: bash deploy.sh
  on:
    branch: main

This example runs a custom deployment script (deploy.sh) when builds on the main branch succeed.

Full Example

Here is a complete .travis.yml file with additional configurations:

yaml
language: go

go:
  - 1.19.x
  - 1.20.x

env:
  - GO111MODULE=on

before_install:
  - go mod tidy
  - go mod vendor

install:
  - go get -u golang.org/x/lint/golint
  - go get -t -v ./...
  - go install

script:
  - golint ./...
  - go vet ./...
  - go test -v ./...

after_success:
  - bash <(curl -s https://codecov.io/bash)

deploy:
  provider: script
  script: bash deploy.sh
  on:
    branch: main

Explanation of Additional Sections

1. before_install:

   • Runs go mod tidy to ensure the go.mod file is correct and go mod vendor to create a vendor directory.

2. install:

   • Installs the golint tool and fetches all the necessary dependencies for testing and building the project.

3. script:

   • Runs golint for linting the code, go vet to check for errors, and go test for running tests.

4. after_success:

   • Uses Codecov to upload code coverage reports after a successful build.

5. deploy:

   • Specifies a custom deployment script that will run only on the main branch.

This configuration ensures that your Go project is properly built, tested, linted, and deployed using Travis CI.