Conditionally enable Jenkins declarative pipeline options?

Question

Does Jenkins provide any functionality to achieve the following pipeline described below?

pipeline
{
    agent any
    options
    {
        when {
            branch 'master'
        }
        disableConcurrentBuilds()
    }
    stages { ... }
}

I have two states for repositories which this single pipeline must manage:

1. Build for commits to merge-requests branches (pre-merge), allow builds to be run concurrently
2. Build the master branch on merge of merge-requests (post-merge), do not allow builds to be run concurrently.

Answer 1

You can use the Lockable Resources Plugin to guarantee that the problematic steps do not run in parallel when on the master branch.

Something like:

stage('on master') {
    when {
        branch 'master'
    }
    steps {
        lock(label: 'choose_a_label') {
            // your steps
        }
    }
}


stage('not on master') {
    when {
        not {
            branch 'master'
        }
    }
    steps {
        // your steps
    }
}