Added `none` as an option for fields_to_plot (#2419)

* Added `none` as an option for fields_to_plot

* Added CI test case

* Further updates, for picmi and CI tests

* Skip the call to amrex::WriteMultiLevelPlotfile when writing no fields

* Now clears m_varnames_fields

* Don't allocate m_mf_output if no varnames

* Updated WarpX-tests.ini

1 files changed, 6 insertions, 1 deletions

diff --git a/Examples/Modules/gaussian_beam/PICMI_inputs_gaussian_beam.py b/Examples/Modules/gaussian_beam/PICMI_inputs_gaussian_beam.py
index fc965787f..b9d060343 100755
--- a/Examples/Modules/gaussian_beam/PICMI_inputs_gaussian_beam.py
+++ b/Examples/Modules/gaussian_beam/PICMI_inputs_gaussian_beam.py
@@ -10,6 +10,11 @@ parser = argparse.ArgumentParser(description="Gaussian beam PICMI example")
 parser.add_argument('--diagformat', type=str,
                     help='Format of the full diagnostics (plotfile, openpmd, ascent, sensei, ...)',
                     default='plotfile')
+parser.add_argument('--fields_to_plot', type=str,
+                    help='List of fields to write to diagnostics',
+                    default=['E', 'B', 'J', 'part_per_cell'],
+                    nargs = '*')
+
 args = parser.parse_args()
 
 constants = picmi.constants
@@ -59,7 +64,7 @@ protons = picmi.Species(particle_type='proton', name='protons', initial_distribu
 field_diag1 = picmi.FieldDiagnostic(name = 'diag1',
                                     grid = grid,
                                     period = 10,
-                                    data_list = ['E', 'B', 'J', 'part_per_cell'],
+                                    data_list = args.fields_to_plot,
                                     warpx_format = args.diagformat,
                                     write_dir = '.',
                                     warpx_file_prefix = 'Python_gaussian_beam_plt')