add path.normjoin

pydu/path.py

@@ -34,3 +34,8 @@ def is_super_path(path1, path2):
         parent_path2 = os.path.dirname(parent_path2)
 
     return False
+
+
+def normjoin(path, *paths):
+    """Join one or more path components intelligently and normalize it."""
+    return os.path.normpath(os.path.join(path, *paths))

tests/test_path.py

@@ -1,7 +1,7 @@
 import os
 import pytest
 from pydu.platform import WINDOWS
-from pydu.path import cd, is_super_path
+from pydu.path import cd, is_super_path, normjoin
 
 
 def test_cd(tmpdir):
@@ -27,3 +27,9 @@ class TestIsSupoerPath:
         assert is_super_path('c:/aa/bb', 'c:/aa\\bb/cc')
         assert is_super_path('c:/aa\\bb', 'c:\\aa/bb/cc')
         assert is_super_path('c:/', 'c:\\')
+
+
+def test_normjoin():
+    assert normjoin('/a', 'b') == '/a/b'
+    assert normjoin('/a', '/b') == '/b'
+    assert normjoin('/a', '../b') == '/b'