Remove redundant usage of sort_looseversions

This now works directly.
Also fix the sort_looseversions function for the distutils version of LooseVersion

easybuild/tools/docs.py

@@ -57,7 +57,7 @@
 from easybuild.tools.config import build_option
 from easybuild.tools.filetools import read_file
 from easybuild.tools.modules import modules_tool
-from easybuild.tools.py2vs3 import OrderedDict, ascii_lowercase, sort_looseversions
+from easybuild.tools.py2vs3 import OrderedDict, ascii_lowercase
 from easybuild.tools.toolchain.toolchain import DUMMY_TOOLCHAIN_NAME, SYSTEM_TOOLCHAIN_NAME, is_system_toolchain
 from easybuild.tools.toolchain.utilities import search_toolchain
 from easybuild.tools.utilities import INDENT_2SPACES, INDENT_4SPACES
@@ -663,7 +663,7 @@ def key_to_ref(name):
             # sort pairs by version (and then by versionsuffix);
             # we sort by LooseVersion to obtain chronological version ordering,
             # but we also need to retain original string version for filtering-by-version done below
-            sorted_pairs = sort_looseversions((LooseVersion(v), vs, v) for v, vs in pairs)
+            sorted_pairs = sorted((LooseVersion(v), vs, v) for v, vs in pairs)
 
             for _, vsuff, ver in sorted_pairs:
                 table_values[0].append('``%s``' % ver)
@@ -721,7 +721,7 @@ def list_software_txt(software, detailed=False):
             # sort pairs by version (and then by versionsuffix);
             # we sort by LooseVersion to obtain chronological version ordering,
             # but we also need to retain original string version for filtering-by-version done below
-            sorted_pairs = sort_looseversions((LooseVersion(v), vs, v) for v, vs in pairs)
+            sorted_pairs = sorted((LooseVersion(v), vs, v) for v, vs in pairs)
 
             for _, vsuff, ver in sorted_pairs:
                 tcs = [x['toolchain'] for x in software[key] if x['version'] == ver and x['versionsuffix'] == vsuff]

easybuild/tools/py2vs3/py3.py

@@ -49,6 +49,13 @@
 # importlib only works with Python 3.4 & newer
 from importlib import reload  # noqa
 
+try:
+    from distutils.version import LooseVersion
+    HAVE_DISTUTILS = True
+except ImportError:
+    LooseVersion = None
+    HAVE_DISTUTILS = False
+
 # string type that can be used in 'isinstance' calls
 string_type = str
 
@@ -120,7 +127,7 @@ def simple_compare(x1, x2):
         else:
             return 0
 
-    if isinstance(v1, LooseVersion) and isinstance(v2, LooseVersion):
+    if HAVE_DISTUTILS and isinstance(v1, LooseVersion) and isinstance(v2, LooseVersion):
         # implementation based on '14894.patch' patch file provided in https://bugs.python.org/issue14894
         for ver1_part, ver2_part in zip_longest(v1.version, v2.version, fillvalue=''):
             # use string comparison if version parts have different type
@@ -142,7 +149,7 @@ def simple_compare(x1, x2):
 
 
 def sort_looseversions(looseversions):
-    """Sort list of (values including) LooseVersion instances."""
+    """Sort list of (values including) distutils.version.LooseVersion instances."""
     # with Python 2, we can safely use 'sorted' on LooseVersion instances
     # (but we can't in Python 3, see https://bugs.python.org/issue14894)
     return sorted(looseversions, key=cmp_to_key(safe_cmp_looseversions))

test/framework/options.py

@@ -6052,30 +6052,45 @@ def test_installdir(self):
         self.assertTrue(eb.installdir.endswith('/software/Core/toy/0.0'))
 
     def test_sort_looseversions(self):
-        """Test sort_looseversions funuction."""
-        ver1 = LooseVersion('1.2.3')
-        ver2 = LooseVersion('4.5.6')
-        ver3 = LooseVersion('1.2.3dev')
-        ver4 = LooseVersion('system')
-        ver5 = LooseVersion('rc3')
-        ver6 = LooseVersion('v1802')
-
-        # some versions are included multiple times on purpose,
-        # to also test comparison between equal LooseVersion instances
-        input = [ver3, ver5, ver1, ver2, ver4, ver6, ver3, ver4, ver1]
-        expected = [ver1, ver1, ver3, ver3, ver2, ver5, ver4, ver4, ver6]
-        self.assertEqual(sort_looseversions(input), expected)
-
-        # also test on list of tuples consisting of a LooseVersion instance + a string
-        # (as in the list_software_* functions)
-        suff1 = ''
-        suff2 = '-foo'
-        suff3 = '-bar'
-        input = [(ver3, suff1), (ver5, suff3), (ver1, suff2), (ver2, suff3), (ver4, suff1),
-                 (ver6, suff2), (ver3, suff3), (ver4, suff3), (ver1, suff1)]
-        expected = [(ver1, suff1), (ver1, suff2), (ver3, suff1), (ver3, suff3), (ver2, suff3),
-                    (ver5, suff3), (ver4, suff1), (ver4, suff3), (ver6, suff2)]
-        self.assertEqual(sort_looseversions(input), expected)
+        """Test sort_looseversions function."""
+        # Test twice: With the standard distutils LooseVersion (when available) and with our class
+        # Note that our class directly allows sorting but should also work with sort_loosversions
+        for use_distutils in (True, False):
+            if use_distutils:
+                try:
+                    from distutils.version import LooseVersion as version_class
+                except ImportError:
+                    continue
+            else:
+                version_class = LooseVersion
+
+            ver1 = version_class('1.2.3')
+            ver2 = version_class('4.5.6')
+            ver3 = version_class('1.2.3dev')
+            ver4 = version_class('system')
+            ver5 = version_class('rc3')
+            ver6 = version_class('v1802')
+
+            # some versions are included multiple times on purpose,
+            # to also test comparison between equal LooseVersion instances
+            input = [ver3, ver5, ver1, ver2, ver4, ver6, ver3, ver4, ver1]
+            expected = [ver1, ver1, ver3, ver3, ver2, ver5, ver4, ver4, ver6]
+            self.assertEqual(sort_looseversions(input), expected)
+            if not use_distutils:
+                self.assertEqual(sorted(input), expected)
+
+            # also test on list of tuples consisting of a LooseVersion instance + a string
+            # (as in the list_software_* functions)
+            suff1 = ''
+            suff2 = '-foo'
+            suff3 = '-bar'
+            input = [(ver3, suff1), (ver5, suff3), (ver1, suff2), (ver2, suff3), (ver4, suff1),
+                     (ver6, suff2), (ver3, suff3), (ver4, suff3), (ver1, suff1)]
+            expected = [(ver1, suff1), (ver1, suff2), (ver3, suff1), (ver3, suff3), (ver2, suff3),
+                        (ver5, suff3), (ver4, suff1), (ver4, suff3), (ver6, suff2)]
+            self.assertEqual(sort_looseversions(input), expected)
+            if not use_distutils:
+                self.assertEqual(sorted(input), expected)
 
     def test_cuda_compute_capabilities(self):
         """Test --cuda-compute-capabilities configuration option."""