if condition to folder branch in Jenkinsfile - if-statement

Question

I have branch folder "feature-set" under this folder there's multibranch
I need to run the below script in my Jenkinsfile with a condition if this build runs from any branches under the "feature-set" folder like "feature-set/" then run the script
the script is:
sh """
if [ ${env.BRANCH_NAME} = "feature-set*" ]
then
echo ${env.BRANCH_NAME}
branchName='${env.BRANCH_NAME}' | cut -d'\\/' -f 2
echo \$branchName
npm install
ng build --aot --output-hashing none --sourcemap=false
fi
"""
the current output doesn't get the condition:
[ feature-set/swat5 = feature-set* ]
any help?

Answer 1

I would re-write this to be primarily Jenkins/Groovy syntax and only go to shell when required.
Based on the info you provided I assume your env.BRANCH_NAME always looks like `feature-set/
// Echo first so we can see value if condition fails
echo(env.BRANCH_NAME)
// startsWith better than contains() based on current usecase
if ( (env.BRANCH_NAME).startsWith('feature-set') ) {
// Split branch string into list based on delimiter
List<String> parts = (env.BRANCH_NAME).tokenize('/')
/**
* Grab everything minus the first part
* This handles branches that include additional '/' characters
* e.g. 'feature-set/feat/my-feat'
*/
branchName = parts[1..-1].join('/')
echo(branchName)
sh('npm install && ng build --aot --output-hashing none --sourcemap=false')
}

Answer 2

This seems to be more on shell side. Since you are planning to use shell if condition the below worked for me.
Administrator1#XXXXXXXX:
$ if [[ ${BRANCH_NAME} = feature-set* ]]; then echo "Success"; fi
Success
Remove the quotes and add an additional "[]" at the start and end respectively.
The additional "[]" works as regex