Allow usage of environment variables in rules path

qgis_deployment_toolbelt/profiles/rules_context.py

@@ -14,6 +14,7 @@
 # Standard library
 import json
 import logging
+import os
 import platform
 from datetime import date
 from getpass import getuser
@@ -43,6 +44,13 @@
 
 
 class QdtRulesContext:
+    def __init__(
+        self,
+        only_prefixed_variables: bool = True,
+        variables_prefix: list[str] = ["QDT_", "QGIS_"],
+    ) -> None:
+        self.only_prefixed_variables = only_prefixed_variables
+        self.variables_prefix = variables_prefix
 
     @property
     def _context_date(self) -> dict:
@@ -60,6 +68,29 @@ def _context_date(self) -> dict:
             "current_year": today.year,
         }
 
+    @property
+    def _context_env(self) -> dict:
+        """Returns a dictionary containing environment variables that can be used in
+            QDT various places: rules...
+
+        The environment variables can be filtered based on self.only_prefixed_variables
+        and self.variables_prefix settings.
+
+        Returns:
+            dict: dict with environment variables to use in rules.
+        """
+        env_vars = dict(os.environ)
+
+        if self.only_prefixed_variables:
+            # Filter variables that start with any of the prefixes
+            return {
+                key: value
+                for key, value in env_vars.items()
+                if any(key.startswith(prefix) for prefix in self.variables_prefix)
+            }
+
+        return env_vars
+
     @property
     def _context_environment(self) -> dict:
         """Returns a dictionary containing some environment information (computer, network,

qgis_deployment_toolbelt/utils/str2bool.py

@@ -29,7 +29,7 @@ def str2bool(input_var: bool | str, raise_exc: bool = False) -> bool | None:
 
     Args:
         input_var (str): value to convert
-        raise_exc (bool, optional): strict mode, defaults to False. Defaults to False.
+        raise_exc (bool, optional): strict mode, defaults to False.
 
     Raises:
         ValueError: input_var is not in true and false sets