jenkins_parallelAgents

// Creation of the stage_list
def node_list = [ "Linux" : ["is_docker" : true], "Windows" : ["is_docker" : false]]

// Creation of a map of stages
def stepsForParallel = node_list.collectEntries {
    ["Build ${it.key}" : transformIntoStage(it.key, it.value)]
}

// Actual build step (with CMake in this case)
def cmake_build(String source_dir, String cmake_generator, String build_type = 'Release') {
    cmakeBuild buildDir: 'build', buildType: build_type, cleanBuild: true, generator: cmake_generator, installation: 'InSearchPath', sourceDir: source_dir, steps: [[withCmake: true, args: '--config ' + build_type]]
}
 
// Creation of the stage
def transformIntoStage(nodeLabel, config) {
    return {
        // Agend selection based on the label that is passed to node()
        node("${nodeLabel}") {
            if(config["is_docker"]) {
                // For Linux builds it uses a Dockerfile that is located in <root>/jenkins/Dockerfile
                def myEnv = docker.build('mydockerimg:tag', 'jenkins')
                myEnv.inside {
                    cmake_build(pwd(), 'Unix Makefiles')
                }
            } else {
                cmake_build(pwd(), 'Visual Studio 14 2015 Win64')
            }
        }
    }
}

// Run the pipeline
pipeline { 
    agent any
    stages {    
        stage ("Parallel Build") {
            steps {
                script {
                    parallel stepsForParallel
                }
            }            
        }
    }
}