Add support for Path from pathlib in CmdAction.

doit/action.py

@@ -214,15 +214,17 @@ def execute(self, out=None, err=None):
 
 
     def expand_action(self):
-        """expand action string using task meta informations
-        @returns (string) - expanded string after substitution
+        """Expand action using task meta informations if action is a string.
+        Convert `Path` elements to `str` if action is a list.
+        @returns: string -> expanded string if action is a string
+                  list - string -> expanded list of command elements
         """
         if not self.task:
             return self.action
 
         # cant expand keywords if action is a list of strings
         if isinstance(self.action, list):
-            return self.action
+            return [str(x) for x in self.action]
 
         subs_dict = {'targets' : " ".join(self.task.targets),
                      'dependencies': " ".join(self.task.file_dep)}

tests/test_action.py

@@ -4,6 +4,7 @@
 import textwrap
 import locale
 locale # quiet pyflakes
+from pathlib import PurePath, Path
 
 from io import StringIO, BytesIO
 import pytest
@@ -222,6 +223,12 @@ def test_string_list_cant_be_expanded(self):
         my_action = action.CmdAction(cmd, task)
         assert cmd == my_action.expand_action()
 
+    def test_list_can_contain_path(self):
+        cmd = ["python", PurePath(TEST_PATH), Path("myecho.py")]
+        task = FakeTask([], [], [], {})
+        my_action = action.CmdAction(cmd, task)
+        assert ["python", TEST_PATH, "myecho.py"] == my_action.expand_action()
+
 
 class TestCmd_print_process_output(object):
     def test_non_unicode_string_error_strict(self):