def merge(self):
'''Merge multiple reflection files into one file.'''
if not self._hklin_files:
raise RuntimeError('no hklin files defined')
self.check_hklout()
hklin_counter = 0
# for each reflection file, need to gather the column names
# and so on, to put in the cad input here - also check to see
# if the column names clash... check also that the spacegroups
# match up...
spacegroup = None
column_names = []
column_names_by_file = {}
for hklin in self._hklin_files:
md = Mtzdump()
md.set_working_directory(self.get_working_directory())
md.set_hklin(hklin)
md.dump()
columns = md.get_columns()
spag = md.get_spacegroup()
if spacegroup is None:
spacegroup = spag
if spag != spacegroup:
raise RuntimeError('spacegroups do not match')
column_names_by_file[hklin] = []
for c in columns:
name = c[0]
if name in ['H', 'K', 'L']:
continue
if name in column_names:
raise RuntimeError('duplicate column names')
column_names.append(name)
column_names_by_file[hklin].append(name)
# if we get to here then this is a good set up...
# create the command line
hklin_counter = 0
for hklin in self._hklin_files:
hklin_counter += 1
self.add_command_line('hklin%d' % hklin_counter)
self.add_command_line(hklin)
self.start()
hklin_counter = 0
for hklin in self._hklin_files:
column_counter = 0
hklin_counter += 1
labin_command = 'labin file_number %d' % hklin_counter
for column in column_names_by_file[hklin]:
column_counter += 1
labin_command += ' E%d=%s' % (column_counter, column)
self.input(labin_command)
self.close_wait()
try:
self.check_for_errors()
self.check_ccp4_errors()
except RuntimeError as e:
# something went wrong; remove the output file
try:
os.remove(self.get_hklout())
except Exception:
pass
raise e
return self.get_ccp4_status()
