Count Lines in CSV's before MLCP

builld.gradle

task importSampleData(type: com.marklogic.gradle.task.MlcpTask) {
     def directory = "./sample-dir/" // can get this from gradle properties

    //parse csv files
     doFirst {
         println "\nSTART: Reading files"
         def totalLineCount = 0
         fileTree(directory).each{ file -> 
            def filename = file.getName()
            def lineCount = java.nio.file.Files.lines(file.toPath()).count() -1;
            println "${filename} has ${lineCount} lines (excluding header)"
            totalLineCount = totalLineCount +  lineCount
        }
        println "FINISHED: Reading files"
        println "TOTAL LINE COUNT (excluding headers): ${totalLineCount}\n"
    }

    //standard mlcp config
    classpath = configurations.mlcp
    command = "IMPORT"
    port = Integer.parseInt(mlStagingPort)
    database = mlStagingDbName
    input_file_path = directory
    input_file_type = "delimited_text"
    delimiter = ";"
    output_collections = "sample,input"
    output_permissions = "rest-reader,read,rest-writer,update"
}