openstack/rally
Code Issues Proposed changes

Load options before importing packages

Browse Source 
Importing modules from the package (rally plugin) can fail while trying
to access proper configuration options. To solve this issue, we need to
load options before loading modules itselves.

Change-Id: I387ed4f6af809e1306d30fb9903d65668eb14839
This commit is contained in:
Andrey Kurilin 2018-05-14 19:34:09 +03:00
parent 3c601c135f
commit d0418d48b7
3 changed files with 41 additions and 25 deletions
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46
rally/common/plugin/discover.py
View File

@ -65,8 +65,8 @@ def import_modules_from_package(package):
sys.modules[module_name] = importlib.import_module(module_name)
def import_modules_by_entry_point():
"""Import plugins by entry-point 'rally_plugins'."""
def find_packages_by_entry_point():
"""Find all packages with rally_plugins entry-point"""
loaded_packages = []
for package in pkg_resources.working_set:
@ -79,6 +79,30 @@ def import_modules_by_entry_point():
if "path" in entry_map:
ep = entry_map["path"]
package_info["plugins_path"] = ep.module_name
if "options" in entry_map:
ep = entry_map["options"]
package_info["options"] = "%s:%s" % (
ep.module_name,
ep.attrs[0] if ep.attrs else "list_opts",
)
if package_info:
package_info.update(
name=package.project_name,
version=package.version)
loaded_packages.append(package_info)
return loaded_packages
def import_modules_by_entry_point(_packages=None):
"""Import plugins by entry-point 'rally_plugins'."""
loaded_packages = _packages or find_packages_by_entry_point()
for package in loaded_packages:
if "plugins_path" in package:
em = pkg_resources.get_entry_map(package["name"])
ep = em["rally_plugins"]["path"]
try:
m = ep.load()
if hasattr(m, "__path__"):
@ -93,26 +117,12 @@ def import_modules_by_entry_point():
msg = ("\t Failed to load plugins from module '%(module)s' "
"(package: '%(package)s')" %
{"module": ep.module_name,
"package": "%s %s" % (package.project_name,
package.version)})
"package": "%s %s" % (package["name"],
package["version"])})
if logging.is_debug():
LOG.exception(msg)
else:
LOG.warning(msg + (": %s" % six.text_type(e)))
else:
package_info["plugins_path"] = ep.module_name
if "options" in entry_map:
ep = entry_map["options"]
package_info["options"] = "%s:%s" % (
ep.module_name,
ep.attrs[0] if ep.attrs else "list_opts",
)
if package_info:
package_info.update(
name=package.project_name,
version=package.version)
loaded_packages.append(package_info)
return loaded_packages

3
rally/plugins/__init__.py
View File

@ -43,10 +43,11 @@ def load():
discover.import_modules_from_package("rally.plugins.openstack")
discover.import_modules_from_package("rally.plugins.workload")
packages = discover.import_modules_by_entry_point()
packages = discover.find_packages_by_entry_point()
for package in packages:
if "options" in package:
opts.register_options_from_path(package["options"])
discover.import_modules_by_entry_point(_packages=packages)
discover.load_plugins("/opt/rally/plugins/")
discover.load_plugins(os.path.expanduser("~/.rally/plugins/"))

11
tests/unit/common/plugin/test_discover.py
View File

@ -193,6 +193,14 @@ class LoadExtraModulesTestCase(test.TestCase):
}})
]
def mock_get_entry_map(name, group=None):
self.assertIsNone(group)
for p in mock_pkg_resources.working_set:
if p.project_name == name:
return p.entry_map
mock_pkg_resources.get_entry_map.side_effect = mock_get_entry_map
# use random uuid to not have conflicts in sys.modules
packages = [[(mock.Mock(), str(uuid.uuid4()), None)] for i in range(3)]
mock_walk_packages.side_effect = packages
@ -205,9 +213,6 @@ class LoadExtraModulesTestCase(test.TestCase):
for ep_name, ep in entry_map.items():
if ep_name == "path":
ep.load.assert_called_once_with()
if package.project_name == "error":
self.assertNotIn(package.project_name, data)
else:
self.assertIn(package.project_name, data)
self.assertEqual(package.version,
data[package.project_name]["version"])