Predefined variables

GitLab offers many predefined variables

Most describe the current job, stage and pipeline

Some describe the GitLab server

Some help interacting with the GitLab server

Hands-On

1. Remove variables directive

    git checkout 160_gitlab_ci/020_variables/predefined -- '*'
   

2. Update build command:

    go build \
        -ldflags "-X main.Version=${CI_COMMIT_REF_NAME}" \
        -o hello \
        .