hasDirectoryChanged.groovy

// Checks for new changes to the context directory
def boolean call(String contextDirectory) {
  // Determine if code has changed within the source context directory.
  def changeLogSets = currentBuild.changeSets
  def filesChangeCnt = 0
  for (int i = 0; i < changeLogSets.size(); i++) {
    def entries = changeLogSets[i].items
    for (int j = 0; j < entries.length; j++) {
      def entry = entries[j]
      //echo "${entry.commitId} by ${entry.author} on ${new Date(entry.timestamp)}: ${entry.msg}"
      def files = new ArrayList(entry.affectedFiles)
      for (int k = 0; k < files.size(); k++) {
        def file = files[k]
        def filePath = file.path
        //echo ">> ${file.path}"
        if (filePath.contains(contextDirectory)) {
          filesChangeCnt = 1
          k = files.size()
          j = entries.length
        }
      }
    }
  }  
  if ( filesChangeCnt < 1 ) {
    echo('The changes do not require a build.')
    return false
  }
  else {
    echo('The changes require a build.')
    return true
  } 
}