add environnement variable

1.5.2

- add environnement variables to set addon preferences project settings at register through `os.getenv('KEY')`:
  - `RENDER_WIDTH` : resolution x
  - `RENDER_HEIGHT` : resolution y
  - `FPS` : project frame rate
  - `PALETTES` : path to the blends (or json) containing materials palettes
  - `BRUSHES` : path to the blend containing brushes to load

__init__.py

@@ -15,7 +15,7 @@ bl_info = {
 "name": "GP toolbox",
 "description": "Set of tools for Grease Pencil in animation production",
 "author": "Samuel Bernou, Christophe Seux",
-"version": (1, 5, 1),
+"version": (1, 5, 2),
 "blender": (2, 91, 0),
 "location": "Sidebar (N menu) > Gpencil > Toolbox / Gpencil properties",
 "warning": "",
@@ -66,6 +66,7 @@ from bpy.props import (FloatProperty,
                         IntProperty)
 
 import bpy
+import os
 from bpy.app.handlers import persistent
 from pathlib import Path
 # from .eyedrop import EyeDropper
@@ -205,11 +206,23 @@ class GPTB_prefs(bpy.types.AddonPreferences):
         description="Character delimiter to use for detecting namespace (prefix), default is '_', space if nothing specified",
         default="_", maxlen=0, subtype='NONE')
 
+    use_env_palettes : BoolProperty(
+        name="Use Project Palettes",
+        description="Load the palette path in environnement at startup (key 'PALETTES')",
+        default=True,
+        )
+
     palette_path : StringProperty(
         name="Palettes directory",
         description="Path to palette containing palette.json files to save and load",
         default="//", maxlen=0, subtype='DIR_PATH')#, update = set_palette_path
 
+    use_env_brushes : BoolProperty(
+        name="Use Project Brushes",
+        description="Load the brushes path in environnement at startup (key 'BRUSHES')",
+        default=True,
+        )
+
     brush_path : StringProperty(
         name="Brushes directory",
         description="Path to brushes containing the blends holding the brushes",
@@ -336,13 +349,20 @@ class GPTB_prefs(bpy.types.AddonPreferences):
             row.label(text='Render Resolution')
             row.prop(self, 'render_res_x', text='Width')
             row.prop(self, 'render_res_y', text='Height')
+            
             ## Palette
             box.label(text='Project folders:')
-            box.prop(self, 'palette_path')
-            box.prop(self, 'brush_path')
+            
+            subbox = box.box()
+            subbox.prop(self, 'use_env_palettes', text='Use Palettes Environnement Path')
+            subbox.prop(self, 'palette_path')
+            
+            ## Brushes
+            subbox.prop(self, 'use_env_brushes', text='Use Brushes Environnement Path')
+            subbox.prop(self, 'brush_path')
 
             ## render output
-            box.prop(self, 'output_path')
+            subbox.prop(self, 'output_path')
             box.prop(self, 'use_relative_remap_on_save')
             
             ### TODO add render settings
@@ -465,6 +485,30 @@ class GPTB_prefs(bpy.types.AddonPreferences):
             addon_updater_ops.update_settings_ui(self, context)
 
 
+
+### --- ENV_PROP ---
+
+def set_env_properties():
+    prefs = get_addon_prefs()
+
+    fps = os.getenv('FPS')
+    prefs.fps = fps if fps else prefs.fps
+
+    render_height = os.getenv('RENDER_HEIGHT')
+    prefs.render_res_x = render_height if render_height else prefs.render_res_x
+
+    render_width = os.getenv('RENDER_WIDTH')
+    prefs.render_res_y = render_width if render_width else prefs.render_res_y
+
+    palettes = os.getenv('PALETTES')
+    if prefs.use_env_palettes:
+        prefs.palette_path = palettes if palettes else prefs.palette_path
+
+    brushes = os.getenv('BRUSHES')
+    if prefs.use_env_brushes:
+        prefs.brush_path = brushes if brushes else prefs.brush_path
+
+
 ### --- REGISTER ---
 
 # class GP_PG_ToolsSettings(bpy.types.PropertyGroup) :
@@ -509,8 +553,9 @@ def register():
     keymaps.register()
     bpy.types.Scene.gptoolprops = bpy.props.PointerProperty(type = GP_PG_ToolsSettings)
 
-    # add handler (if option is on)
-
+    set_env_properties()
+    
+    ## add handler (if option is on)
     if get_addon_prefs().use_relative_remap_on_save:
         if not 'remap_relative' in [hand.__name__ for hand in bpy.app.handlers.save_pre]:
             bpy.app.handlers.save_pre.append(remap_relative)