Cleanup after removing Python 2 support

.github/workflows/unit_tests.yml

@@ -101,12 +101,12 @@ jobs:
         # and are only run after the PR gets merged
         GITHUB_TOKEN: ${{secrets.CI_UNIT_TESTS_GITHUB_TOKEN}}
       run: |
-        # only install GitHub token when testing with Lmod 8.x + Python 3.6 or 3.9, to avoid hitting GitHub rate limit;
+        # only install GitHub token when testing with Lmod 8.x + Python 3.6 or 3.9, to avoid hitting GitHub rate limit
         # tests that require a GitHub token are skipped automatically when no GitHub token is available
         if [[ "${{matrix.modules_tool}}" =~ 'Lmod-8' ]] && [[ "${{matrix.python}}" =~ 3.[69] ]]; then
           if [ ! -z $GITHUB_TOKEN ]; then
-            SET_KEYRING="import keyrings.alt.file; keyring.set_keyring(keyrings.alt.file.PlaintextKeyring())";
-            python -c "import keyring; $SET_KEYRING; keyring.set_password('github_token', 'easybuild_test', '$GITHUB_TOKEN')";
+            SET_KEYRING="import keyrings.alt.file; keyring.set_keyring(keyrings.alt.file.PlaintextKeyring())"
+            python -c "import keyring; $SET_KEYRING; keyring.set_password('github_token', 'easybuild_test', '$GITHUB_TOKEN')"
           fi
           echo "GitHub token installed!"
         else
@@ -187,7 +187,17 @@ jobs:
             # run test suite
             python -O -m test.framework.suite 2>&1 | tee test_framework_suite.log
             # try and make sure output of running tests is clean (no printed messages/warnings)
-            IGNORE_PATTERNS="no GitHub token available|skipping SvnRepository test|requires Lmod as modules tool|stty: 'standard input': Inappropriate ioctl for device|CryptographyDeprecationWarning: Python 3.[56]|from cryptography.* import |CryptographyDeprecationWarning: Python 2|Blowfish|GC3Pie not available, skipping test|CryptographyDeprecationWarning: TripleDES has been moved|algorithms.TripleDES"
+            IGNORE_PATTERNS="no GitHub token available"
+            IGNORE_PATTERNS+="|skipping SvnRepository test"
+            IGNORE_PATTERNS+="|requires Lmod as modules tool"
+            IGNORE_PATTERNS+="|stty: 'standard input': Inappropriate ioctl for device"
+            IGNORE_PATTERNS+="|CryptographyDeprecationWarning: Python 3.[56]"
+            IGNORE_PATTERNS+="|from cryptography.* import "
+            IGNORE_PATTERNS+="|CryptographyDeprecationWarning: Python 2"
+            IGNORE_PATTERNS+="|Blowfish"
+            IGNORE_PATTERNS+="|GC3Pie not available, skipping test"
+            IGNORE_PATTERNS+="|CryptographyDeprecationWarning: TripleDES has been moved"
+            IGNORE_PATTERNS+="|algorithms.TripleDES"
             # '|| true' is needed to avoid that GitHub Actions stops the job on non-zero exit of grep (i.e. when there are no matches)
             PRINTED_MSG=$(egrep -v "${IGNORE_PATTERNS}" test_framework_suite.log | grep '\.\n*[A-Za-z]' || true)
             test "x$PRINTED_MSG" = "x" || (echo "ERROR: Found printed messages in output of test suite" && echo "${PRINTED_MSG}" && exit 1)

easybuild/framework/easyconfig/easyconfig.py

@@ -46,8 +46,8 @@
 import functools
 import os
 import re
-from contextlib import contextmanager
 from collections import OrderedDict
+from contextlib import contextmanager
 
 import easybuild.tools.filetools as filetools
 from easybuild.base import fancylogger

easybuild/tools/py2vs3/py3.py

@@ -36,7 +36,6 @@
 import json
 import sys
 import urllib.request as std_urllib  # noqa
-from collections import OrderedDict  # noqa
 from collections.abc import Mapping  # noqa
 from functools import cmp_to_key
 from importlib.util import spec_from_file_location, module_from_spec

easybuild/tools/systemtools.py

@@ -736,7 +736,6 @@ def get_os_name():
     # platform.linux_distribution was removed in Python 3.8,
     # see https://docs.python.org/2/library/platform.html#platform.linux_distribution
     if hasattr(platform, 'linux_distribution'):
-        # platform.linux_distribution is more useful, but only available since Python 2.6
         # this allows to differentiate between Fedora, CentOS, RHEL and Scientific Linux (Rocks is just CentOS)
         with warnings.catch_warnings():
             warnings.simplefilter("ignore", category=PendingDeprecationWarning)

test/framework/repository.py

@@ -40,7 +40,6 @@
 from easybuild.tools.filetools import read_file
 from easybuild.tools.repository.filerepo import FileRepository
 from easybuild.tools.repository.gitrepo import GitRepository
-from easybuild.tools.repository.hgrepo import HgRepository
 from easybuild.tools.repository.svnrepo import SvnRepository
 from easybuild.tools.repository.repository import init_repository
 from easybuild.tools.run import run_shell_cmd
@@ -129,27 +128,6 @@ def test_svnrepo(self):
         self.assertExists(os.path.join(repo.wc, 'trunk', 'README.md'))
         shutil.rmtree(repo.wc)
 
-    # this test is disabled because it fails in Travis as a result of bitbucket disabling TLS 1.0/1.1
-    # we can consider re-enabling it when moving to a more recent Ubuntu version in the Travis config
-    # (which implies dropping support for Python 2.6)
-    # cfr. https://github.com/easybuilders/easybuild-framework/pull/2678
-    def DISABLED_test_hgrepo(self):
-        """Test using HgRepository."""
-        # only run this test if pysvn Python module is available
-        try:
-            import hglib  # noqa
-        except ImportError:
-            print("(skipping HgRepository test)")
-            return
-
-        # GitHub also supports SVN
-        test_repo_url = 'https://kehoste@bitbucket.org/kehoste/testrepository'
-
-        repo = HgRepository(test_repo_url)
-        repo.init()
-        self.assertExists(os.path.join(repo.wc, 'README'))
-        shutil.rmtree(repo.wc)
-
     def test_init_repository(self):
         """Test use of init_repository function."""
         repo = init_repository('FileRepository', self.path)