Do not trigger build when creating new branch from Gitlab issue - gitlab

Question

I use Gitlab on gitlab.com and the issue tracker.
Each time I have an issue, I create a new branch on the button inside the issue, but this triggers a new build (pipeline) in CI.
I don't want this because this branch is coming from master and doesn't need to be built.
How can I achieve that ? Is this a gitlab-ci.yml modification or a repository related configuration ?

Answer 1

You can define, in which branches particular steps of your build will run, via only and except parameters to the builds: https://docs.gitlab.com/ee/ci/yaml/#only-and-except-complex
For example, run java build in all branches except issue branches:
java-build:
stage: build
except:
- /^issue-.*$/
script:
- mvn -U -e install
image: maven:3.5-jdk-8
Restrict build only to master and release branches:
java-build:
stage: build
only:
- master
- /^RELEASE-.*$/
script:
- mvn -U -e install
image: maven:3.5-jdk-8

Answer 2

Based on the Commit message we can avoid building for the newly created branch on GitLab CI/CD pipeline
Build Branch(master):
stage: build
only:
refs:
- master
variables:
- $CI_COMMIT_MESSAGE =~ /^\[master\].*$/
script:
- echo "master branch"
# - sleep 60 | echo "hello master"
# when: delayed
# start_in: 3 minutes
interruptible: true
Build Branch(release):
stage: build
only:
refs:
- /^build_.*$/
variables:
- $CI_COMMIT_MESSAGE =~ /^\[build\].*$/
script:
- echo "release branch"
# - sleep 60 | echo "hello release"
# when: delayed
# start_in: 3 minutes
interruptible: true
The branches will trigger when the commit message has start with [master] or [build]