Fix get_clean_hydrad when using a local copy (#166)

* use shutil for copying dirs

* add tests for configure.util

pydrad/configure/tests/test_util.py

@@ -0,0 +1,13 @@
+import pytest
+
+from pydrad.configure.util import get_clean_hydrad
+
+
+def test_clean_hydrad_from_local(tmpdir_factory, hydrad):
+    new_hydrad_copy = tmpdir_factory.mktemp('new_hydrad')
+    get_clean_hydrad(new_hydrad_copy, base_path=hydrad, from_github=False, overwrite=True)
+
+
+def test_clean_hydrad_no_args_raises_error():
+    with pytest.raises(ValueError, match='Specify local path to HYDRAD or clone from GitHub'):
+        get_clean_hydrad('foo', base_path=None, from_github=False)

pydrad/configure/util.py

@@ -8,7 +8,6 @@
 import stat
 import subprocess
 import tempfile
-from distutils.dir_util import copy_tree
 
 import astropy.units as u
 
@@ -118,7 +117,7 @@ def _handle_readonly(func, path, exc_info):
             git.Repo.clone_from('https://github.com/rice-solar-physics/HYDRAD',
                                 tmpdir)
         elif base_path:
-            copy_tree(base_path, tmpdir)
+            shutil.copytree(base_path, tmpdir, dirs_exist_ok=True)
         else:
             raise ValueError('Specify local path to HYDRAD or clone from GitHub')
         rm_dirs = [