gitlab-ci: exclude merge requests from specific branch

Question

I would like gitlab-ci to ignore merge from a specific branch.

Example: I have 3 branches. master, development & test.

If I push the code directly or merge the code from any branch to master/development, the pipelines get executed.

Now, I don't want pipeline to get running when I merge from test branch specifically.

I would like to exclude merge from test branch to development or master.

Rémi Chauvenne · Accepted Answer · 2021-02-19 09:23:49Z

1

This can be done by specifying an if-rule for the jobs you want to exclude. For example:

docker build:
  script: docker build -t my-image:$CI_COMMIT_REF_SLUG .
  rules:
    - if: '$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME != "test" || ($CI_MERGE_REQUEST_SOURCE_BRANCH_NAME == "test" and ($CI_MERGE_REQUEST_TARGET_BRANCH_NAME != "master" || $CI_MERGE_REQUEST_TARGET_BRANCH_NAME != "development"))'

The 2 variables CI_MERGE_REQUEST_SOURCE_BRANCH_NAME and CI_MERGE_REQUEST_TARGET_BRANCH_NAME are automatically defined only in the case of a merge request.

edited Feb 19, 2021 at 9:23

answered Feb 18, 2021 at 21:06

Rémi Chauvenne

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Alexander Pavlov · Accepted Answer · 2021-02-18 20:07:05Z

0

Gitlab CI does not have to verify "what" is being merged, only "where" it is being merged.

You could do it using script which uses git commands (it allows to check both parents for merge commit). However, I advise you to do not do it. The reason is you can miss build for changes merged from not "test" branch.

E.g.

dev merges feature branch to master
Gitlab CI starts build as it is not "test" branch
while build is running, dev merges "test" to master
Gitlab CI will cancel previous pipeline and start new one
Script will detect merge happened from "test" and exit

At this point, build started at p2 is cancelled by Gitlab, build started at p2 is cancelled by your script. As a result, required build is missing.

answered Feb 18, 2021 at 20:07

Alexander Pavlov

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