add development-only extension functionality

lib/extensions/base.py

@@ -18,6 +18,10 @@ from ..update import update_inkstitch_document
 class InkstitchExtension(inkex.EffectExtension):
     """Base class for Inkstitch extensions.  Not intended for direct use."""
 
+    # Set to True to hide this extension from release builds of Ink/Stitch.  It will
+    # only be available in development installations.
+    DEVELOPMENT_ONLY = False
+
     def load(self, *args, **kwargs):
         document = super().load(*args, **kwargs)
         update_inkstitch_document(document)

lib/extensions/sew_stack_editor.py

@@ -531,6 +531,8 @@ class SewStackPanel(wx.Panel):
 
 
 class SewStackEditor(InkstitchExtension):
+    DEVELOPMENT_ONLY = True
+
     def __init__(self, *args, **kwargs):
         self.cancelled = False
         InkstitchExtension.__init__(self, *args, **kwargs)

lib/inx/extensions.py

@@ -3,6 +3,8 @@
 # Copyright (c) 2010 Authors
 # Licensed under the GNU GPL version 3.0 or later.  See the file LICENSE for details.
 
+import os
+
 import pyembroidery
 
 from ..commands import (COMMANDS, GLOBAL_COMMANDS, LAYER_COMMANDS,
@@ -47,6 +49,9 @@ def generate_extension_inx_files(alter_data):
         if extension is Input or extension is Output:
             continue
 
+        if extension.DEVELOPMENT_ONLY and 'BUILD' in os.environ:
+            continue
+
         name = extension.name()
         template = env.get_template(f'{name}.xml')
         write_inx_file(name, template.render(alter_data,