Change default export format to compressed hdf5 (#2812)

most ilastik outputs compress very well - compressed hdf5 should be made
the default format.
Furthermore the default format can now be customized in the config.

ilastik/applets/dataExport/opDataExport.py

@@ -93,7 +93,7 @@ class OpDataExport(Operator):
         value=cfg["ilastik"]["output_filename_format"]
     )  # A format string allowing {dataset_dir} {nickname}, {roi}, {x_start}, {x_stop}, etc.
     OutputInternalPath = InputSlot(value="exported_data")
-    OutputFormat = InputSlot(value="hdf5")
+    OutputFormat = InputSlot(value=cfg["ilastik"]["output_format"])
 
     # Only export csv/HDF5 table (don't export volume)
     TableOnlyName = InputSlot(value="Table-Only")

ilastik/config.py

@@ -29,7 +29,12 @@
 import appdirs
 
 """
-ilastik will read settings from ~/.ilastikrc
+ilastik will read settings from ilastik.ini
+which should be located at
+
+* windows: C:\\Users\\<USERNAME>\\AppData\\Local\\ilastik
+* osx: /Users/<USERNAME>/Library/Caches/ilastik
+* linux: /home/<USERNAME>/.config/ilastik
 
 Example:
 
@@ -44,6 +49,7 @@
 debug: false
 plugin_directories: ~/.ilastik/plugins,
 output_filename_format: {dataset_dir}/{nickname}_{result_type}
+output_format: compressed hdf5
 
 [lazyflow]
 threads: -1