use dev variant in dev mode

openpype/settings/ayon_settings.py

@@ -290,6 +290,16 @@ def _convert_modules_system(
             modules_settings[key] = value
 
 
+def is_dev_mode_enabled():
+    """Dev mode is enabled in AYON.
+
+    Returns:
+        bool: True if dev mode is enabled.
+    """
+
+    return os.getenv("AYON_USE_DEV") == "1"
+
+
 def convert_system_settings(ayon_settings, default_settings, addon_versions):
     default_settings = copy.deepcopy(default_settings)
     output = {
@@ -1400,15 +1410,39 @@ class _AyonSettingsCache:
         if _AyonSettingsCache.variant is None:
             from openpype.lib.openpype_version import is_staging_enabled
 
-            _AyonSettingsCache.variant = (
-                "staging" if is_staging_enabled() else "production"
-            )
+            variant = "production"
+            if is_dev_mode_enabled():
+                variant = cls._get_dev_mode_settings_variant()
+            elif is_staging_enabled():
+                variant = "staging"
+            _AyonSettingsCache.variant = variant
         return _AyonSettingsCache.variant
 
     @classmethod
     def _get_bundle_name(cls):
         return os.environ["AYON_BUNDLE_NAME"]
 
+    @classmethod
+    def _get_dev_mode_settings_variant(cls):
+        """Develop mode settings variant.
+
+        Returns:
+            str: Name of settings variant.
+        """
+
+        bundles = ayon_api.get_bundles()
+        user = ayon_api.get_user()
+        username = user["name"]
+        for bundle in bundles:
+            if (
+                bundle.get("isDev")
+                and bundle.get("activeUser") == username
+            ):
+                return bundle["name"]
+        # Return fake variant - distribution logic will tell user that he does not
+        #   have set any dev bundle
+        return "dev"
+
     @classmethod
     def get_value_by_project(cls, project_name):
         cache_item = _AyonSettingsCache.cache_by_project_name[project_name]