How to split the variable in Gitlab pipline (.gitlab-ci.yml)

I have a branch name, for example, release-1.1.3, how I can split and extract the version by writing some logic in gitlab-ci file. Is there some method available for it?

before_script

export BRANCH_NAME=$CI_COMMIT_REF_NAME

// here I want to do something to extract the version
export Major=BRANCH_NAME.someoperation
export Minor=BRANCH_NAME.someoperation
export PATCH=BRANCH_NAME.someoperation

any other approaches are also welcome but I required the value in a separate variable which I can pass it to other operations.

I am new to gitlab-ci and working on it, thanks in advance.

Solution

Just split your string

You will find some examples here.

How to cut a string after a specific character in unix