Multiple Pipelines

With V2, Nix GitLab CI can generate different pipelines, depending on the pipeline source ($CI_PIPELINE_SOURCE).

By default, no matter which source, the default pipeline is built and ran. $NIX_CI_PIPELINE can override that, eg. when manually triggering a run. To configure which source should be 1-to-1 translated to a pipeline with the same name, set $NIX_CI_DEFAULT_SOURCES to a regex which explicitly does not match these sources. Or set it to an impossible to match regex, then it will always run the pipeline named after $CI_PIPELINE_SOURCE.

Example 1: always run default

If you only have a single pipeline, you just have to call it default. Everything else works out of the box.

Example 2: default and merge_request_event

If you want the source merge_request_event to trigger a different pipeline, name it like that and set $NIX_CI_DEFAULT_SOURCES to ^(merge_request_event)$. Now a merge request will run this pipeline, while everything else runs default.

Example 3: default, push and web

Set $NIX_CI_DEFAULT_SOURCES to ^(push|web)$.

Example 4: always run the specific pipelines, never default

Set $NIX_CI_DEFAULT_SOURCES to any regex that never matches the sources, like a\A or nothing.