Re-enable shell completion cache

This enables writing ids to a local completion
cache when using the manilaclient shell, which
allows tools/manila.bash_completion to complete
commands such as:
    manila delete a<tab>

Share ids are recorded on "manila list" operations.

Caching can be expanded to cover additional
types of manila objects using this same infrastructure.

Uses ~/.cache/manilaclient/ to match path standards,
and uses SHA-1 since Python running w/ FIPS mode may
not have MD5.

Also, fix a small bug in the fakes used in our test suite.
We were adding the shares count (an optional param) to all
the list responses, while this is something that should be done
only if the param with_count is set to True.

Co-Authored-By: Victoria Martinez de la Cruz <victoria@redhat.com>
Closes-Bug: #1712835
Change-Id: I7f4dedf1dd4b7db6cf24fc1c4ed2a8d3685f714c

manilaclient/base.py

@@ -96,14 +96,14 @@ class Manager(utils.HookableMixin):
         """
         base_dir = cliutils.env('manilaclient_UUID_CACHE_DIR',
                                 'MANILACLIENT_UUID_CACHE_DIR',
-                                default="~/.manilaclient")
+                                default="~/.cache/manilaclient")
 
         # NOTE(sirp): Keep separate UUID caches for each username + endpoint
         # pair
         username = cliutils.env('OS_USERNAME', 'MANILA_USERNAME')
         url = cliutils.env('OS_URL', 'MANILA_URL')
-        uniqifier = hashlib.md5(username.encode('utf-8') +
-                                url.encode('utf-8')).hexdigest()
+        uniqifier = hashlib.sha1(username.encode('utf-8') +
+                                 url.encode('utf-8')).hexdigest()
 
         cache_dir = os.path.expanduser(os.path.join(base_dir, uniqifier))
 
@@ -139,7 +139,10 @@ class Manager(utils.HookableMixin):
     def write_to_completion_cache(self, cache_type, val):
         cache = getattr(self, "_%s_cache" % cache_type, None)
         if cache:
-            cache.write("%s\n" % val)
+            try:
+                cache.write("%s\n" % val)
+            except UnicodeEncodeError:
+                pass
 
     def _get(self, url, response_key=None):
         resp, body = self.api.client.get(url)

manilaclient/tests/unit/utils.py

@@ -48,6 +48,16 @@ class TestCase(testtools.TestCase):
         self.addCleanup(patcher.stop)
         return new_attr
 
+    def mock_completion(self):
+        patcher = mock.patch(
+            'manilaclient.base.Manager.write_to_completion_cache')
+        patcher.start()
+        self.addCleanup(patcher.stop)
+
+        patcher = mock.patch('manilaclient.base.Manager.completion_cache')
+        patcher.start()
+        self.addCleanup(patcher.stop)
+
 
 class TestResponse(requests.Response):
     """Class used to wrap requests.Response.

manilaclient/tests/unit/v2/fakes.py

@@ -225,6 +225,7 @@ class FakeHTTPClient(fakes.FakeHTTPClient):
     def get_shares_detail(self, **kw):
         endpoint = "http://127.0.0.1:8786/v2"
         share_id = '1234'
+
         shares = {
             'shares': [
                 {
@@ -241,8 +242,11 @@ class FakeHTTPClient(fakes.FakeHTTPClient):
                     ],
                 },
             ],
-            'count': 2,
         }
+
+        if kw.get('with_count'):
+            shares.update({'count': 2})
+
         return (200, {}, shares)
 
     def get_snapshots_1234(self, **kw):

manilaclient/tests/unit/v2/test_shell.py

@@ -63,6 +63,7 @@ class ShellTest(test_utils.TestCase):
         for var in self.FAKE_ENV:
             self.useFixture(fixtures.EnvironmentVariable(var,
                                                          self.FAKE_ENV[var]))
+        self.mock_completion()
 
         self.shell = shell.OpenStackManilaShell()
 

manilaclient/v2/shell.py

@@ -28,6 +28,7 @@ from manilaclient.common.apiclient import utils as apiclient_utils
 from manilaclient.common import cliutils
 from manilaclient.common import constants
 from manilaclient import exceptions
+import manilaclient.v2.shares
 
 
 def _wait_for_resource_status(cs,
@@ -2328,6 +2329,19 @@ def do_list(cs, args):
     if args.count:
         print("Shares in total: %s" % total_count)
 
+    with cs.shares.completion_cache('uuid',
+                                    manilaclient.v2.shares.Share,
+                                    mode="w"):
+        for share in shares:
+            cs.shares.write_to_completion_cache('uuid', share.id)
+
+    with cs.shares.completion_cache('name',
+                                    manilaclient.v2.shares.Share,
+                                    mode="w"):
+        for share in shares:
+            if share.name is not None:
+                cs.shares.write_to_completion_cache('name', share.name)
+
 
 @cliutils.arg(
     '--share-id',

tools/manila.bash_completion

@@ -7,7 +7,7 @@ _manila()
 
     opts="$(manila bash_completion)"
 
-    COMPLETION_CACHE=~/.manilaclient/*/*-cache
+    COMPLETION_CACHE=~/.cache/manilaclient/*/*-cache
     opts+=" "$(cat $COMPLETION_CACHE 2> /dev/null | tr '\n' ' ')
 
     COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )