Relax mandatory need for relative base paths (#41)

* Use os.path.relpath for conformation

PurePath.relative_to() requires self to be the subpath of the argument, but os.path.relpath() does not.

Fixes Question on the mandatory need for relative path #37x

* Sort paths and relpaths
to keep log messages and conformation printout self consistent

colcon_clean/subverb/__init__.py

@@ -2,6 +2,7 @@
 # Copyright 2021 Ruffin White
 # Licensed under the Apache License, Version 2.0
 
+import os
 from pathlib import Path
 import shutil
 
@@ -231,14 +232,14 @@ def clean_paths(paths, confirmed=False):
     cwd_path = Path.cwd()
     if not confirmed:
         print('Paths:')
-        for path in sorted(paths):
-            path = path.relative_to(cwd_path)
+        relpaths = (os.path.relpath(path, cwd_path) for path in paths)
+        for path in sorted(relpaths):
             print('    ', path)
         question = 'Clean the above paths?'
         confirmed = query_yes_no(question)
 
     if confirmed:
-        for path in paths:
+        for path in sorted(paths):
             _clean_path(path)
 
 

test/spell_check.words

@@ -24,6 +24,8 @@ pathlib
 plugin
 pydocstyle
 pytest
+relpath
+relpaths
 rmtree
 rtype
 scantree