GitLab CI: No such variable CI_BUILD_ID

[ytyukhnin]

Description

According to the official documentation there is no such variable CI_BUILD_ID on the list of the GitLab CI variables: https://docs.gitlab.com/ee/ci/variables/

But Fake is providing a following function

namespace Fake.Core
...
module BuildServer =
...
let gitlabCIBuildNumber = if isGitlabCI then Environment.environVar "CI_BUILD_ID" else ""

Which as the result is always returning an empty string while running on a GitLab CI.

Repro steps

Call a BuildServer.gitlabCIBuildNumber function while running at a GitLab CI runner.

Expected behavior

The function should be instead looking for a variable CI_PIPELINE_ID which defines a pipeline id.

Known workarounds

Use Environment.environVar "CI_PIPELINE_ID" directly.

[matthid]

Hm, I always thought I just copied from the docs. Did this stuff change? Do we need to check the old one for backwards compat or old on-premise instances?

[ytyukhnin]

Well, we started to use GitLab only few months ago, but I did some search on the Internet, and it seems they renamed CI_BUILD_ID into CI_PIPELINE_ID about a year ago. So I think it's better to keep it backwards compatible.

[ryanjaeb]

This issue ranks pretty high in Google when searching for GitLab CI_BUILD_ID. I ended up skimming the archived docs and CI_BUILD_ID was actually renamed to CI_JOB_ID. Here's what the docs used to show: