gistfile1.txt

pipeline {
    agent none
    stages {
        stage("BuildAndTest") {
            matrix {
                agent {
                    label "${os}"
                }
                when {
                    and {
                        branch 'linux'
                        not { environment name: 'os', value: 'linux'}
                    }
                }        
                axes {
                    axis {
                        name 'os'
                        values "linux", "windows", "mac"
                    }
                    axis {
                        name 'browser'
                        values "firefox", "chrome", "safari", "ie"
                    }
                }
                excludes {
                    exclude {
                        axis {
                            name 'os'
                            values 'linux'
                        }
                        axis {
                            name 'browser'
                            values 'safari'
                        }
                    }
                    exclude {
                        axis {
                            name 'os'
                            notValues 'windows'
                        }
                        axis {
                            name 'browser'
                            values "ie"
                        }
                    }
                }
                stages {
                    stage("first") {
                        steps {
                            echo "First branch"
                            echo "OS=$os"
                            echo "BROWSER=$browser"
                        }
                    }
                    stage("second") {
                        steps {
                            echo "Second branch"
                        }
                    }
                }
            }
        }
    }
}