clean: correctly determine the path for excluding seed directory

Daniel Watkins · Server Team CI Bot · commit 109772c2e906 · 2019-03-04T22:36:07.000Z
Previously, init.paths.cloud_dir has a trailing slash, which meant that
"/var/lib/cloud//seed" was being compared to "/var/lib/cloud/seed" and
(of course), never matching.

In this commit, switch to using os.path.join to avoid this case (and
update the tests to catch it in future).

LP: #1818571
diff --git a/cloudinit/cmd/clean.py b/cloudinit/cmd/clean.py
@@ -62,8 +62,9 @@ def remove_artifacts(remove_logs, remove_seed=False):
 
     if not os.path.isdir(init.paths.cloud_dir):
         return 0  # Artifacts dir already cleaned
+    seed_path = os.path.join(init.paths.cloud_dir, 'seed')
     for path in glob.glob('%s/*' % init.paths.cloud_dir):
-        if path == '%s/seed' % init.paths.cloud_dir and not remove_seed:
+        if path == seed_path and not remove_seed:
             continue
         try:
             if os.path.isdir(path) and not is_link(path):
diff --git a/cloudinit/cmd/tests/test_clean.py b/cloudinit/cmd/tests/test_clean.py
@@ -22,7 +22,8 @@ def setUp(self):
         class FakeInit(object):
             cfg = {'def_log_file': self.log1,
                    'output': {'all': '|tee -a {0}'.format(self.log2)}}
-            paths = mypaths(cloud_dir=self.artifact_dir)
+            # Ensure cloud_dir has a trailing slash, to match real behaviour
+            paths = mypaths(cloud_dir='{}/'.format(self.artifact_dir))
 
             def __init__(self, ds_deps):
                 pass
