set the actual environment

src/box/packager.py

@@ -227,6 +227,9 @@ def _set_env(self):
         os.environ["PYAPP_PYTHON_VERSION"] = py_version
         if value := self.config.optional_dependencies:
             os.environ["PYAPP_PIP_OPTIONAL_DEPS"] = value
+        optional_pyapp_vars = self.config.optional_pyapp_variables
+        for key, value in optional_pyapp_vars.items():
+            os.environ[key] = value
 
     # STATIC METHODS #
     @staticmethod

tests/func/test_packager.py

@@ -231,7 +231,8 @@ def test_package_pyapp_cargo_and_move(rye_project, mocker, binary_extensions):
 
 
 @pytest.mark.parametrize("opt_deps", ["gui", None])
-def test_set_env(rye_project, opt_deps, mocker):
+@pytest.mark.parametrize("opt_pyapp_vars", ["PYAPP_SOMETHING 2", None])
+def test_set_env(rye_project, opt_deps, opt_pyapp_vars, mocker):
     """Set environment for `PyApp` packaging."""
     config = PyProjectParser()
     exec_spec = config.app_entry
@@ -245,6 +246,10 @@ def test_set_env(rye_project, opt_deps, mocker):
     # write optional deps to the pyproject.toml
     if opt_deps:
         pyproject_writer("optional_deps", opt_deps)
+    if opt_pyapp_vars:
+        tmp_split = opt_pyapp_vars.split()
+        opt_pyapp_vars = {tmp_split[0]: tmp_split[1]}
+        pyproject_writer("optional_pyapp_vars", opt_pyapp_vars)
 
     packager = PackageApp()
     packager.build()
@@ -258,6 +263,8 @@ def test_set_env(rye_project, opt_deps, mocker):
     assert os.environ["PYAPP_PYTHON_VERSION"] == ut.PYAPP_PYTHON_VERSIONS[-1]
     if opt_deps:
         assert os.environ["PYAPP_PIP_OPTIONAL_DEPS"] == opt_deps
+    if opt_pyapp_vars:
+        assert os.environ["PYAPP_SOMETHING"] == "2"
 
 
 def test_set_env_delete_existing(rye_project, mocker):