Issue 120: set TangoDataWriter properties from NeXusWriterProperties variable

ChangeLog

@@ -1,3 +1,7 @@
+2024-06-06 Jan Kotanski <jankotan@gmail.com>
+	* set TangoDataWriter properties from NeXusWriterProperties variable (#121)
+	* tagged as 3.24.0
+
 2024-06-04 Jan Kotanski <jankotan@gmail.com>
 	* skip acquisition for the modes listed in NeXusSkipAcquisitionModes variable (#117)
 	* tagged as 3.23.0

README.rst

@@ -225,4 +225,5 @@ The NeXus file recorder uses the following sardana environment variables
 * **ScicatMeasurements** *(dict)* - a dictionary of  measurement names indexed by ``ScanDir`` and  used by ``scingestor``, default: ``{}``
 * **CreateMeasurementFile** *(bool)* - create a measurement file with its filename releated to ``ScicatMeasurements`` or ``ScanFile``, default: ``False``
 * **NeXusSkipAcquisitionModes** *(list)* - a list of strategy modes for which acquisition is skip
+* **NeXusWriterProperties** *(dict)* - a dictionary of TangoDataWriter (NXSDataWriter) properties (starting with a small letter)
 

sardananxsrecorder/__init__.py

@@ -20,4 +20,4 @@
 """ Sardana Scan Recorders """
 
 #: package version
-__version__ = "3.23.0"
+__version__ = "3.24.0"

sardananxsrecorder/nxsrecorder.py

@@ -543,6 +543,18 @@ def __setNexusDevices(self, onlyconfig=False):
             if self.__nexuswriter_device is None:
                 from nxswriter import TangoDataWriter
                 self.__nexuswriter_device = TangoDataWriter.TangoDataWriter()
+                try:
+                    properties = dict(
+                        self.__getEnvVar("NeXusWriterProperties", {}))
+                except Exception as e:
+                    self.warning(
+                        "Cannot load NeXusWriterProperties %s" % (str(e)))
+                    self.__macro().warning(
+                        "Cannot load NeXusWriterProperties %s" % (str(e)))
+                    properties = {}
+                for ky, vl in properties.items():
+                    if hasattr(self.__nexuswriter_device, ky):
+                        setattr(self.__nexuswriter_device, ky, vl)
 
     def __get_alias(self, name):
         """ provides a device alias