Feature: Convert to GDML script and pipeline integration

scripts/convert_to_gdml.py

+from __future__ import absolute_import, unicode_literals
+import os
+import time
+import logging
+
+import argparse
+parser = argparse.ArgumentParser(
+     prog='convert_to_gdml.py',
+     description='''Convert DD4Hep description to GDML''',
+     epilog='''
+     This program converts the compact detector file to a single GDML file.
+         ''')
+parser.add_argument("--compact", help="compact detector file",default="athena.xml")
+parser.add_argument("--output", help="gdml detector file",default="athena.gdml")
+
+args = parser.parse_args()
+
+import DDG4
+from g4units import keV, GeV, mm, ns, MeV
+
+def run():
+  kernel = DDG4.Kernel()
+  description = kernel.detectorDescription()
+  kernel.loadGeometry(str("file:" + args.compact))
+
+  DDG4.importConstants(description)
+
+  geant4 = DDG4.Geant4(kernel)
+  ui = geant4.setupCshUI(ui=None)
+  #
+  # Setup the GDML writer action
+  writer = DDG4.Action(kernel, 'Geant4GDMLWriteAction/Writer')
+  writer.enableUI()
+  kernel.registerGlobalAction(writer)
+  ui.Commands = [
+      '/ddg4/Writer/Output {}'.format(args.output),
+      '/ddg4/Writer/OverWrite 1',
+      '/ddg4/Writer/write'
+      ]
+  kernel.configure()
+  kernel.initialize()
+  kernel.run()
+  kernel.terminate()
+
+
+if __name__ == "__main__":
+  run()