205 lines
8.2 KiB
Python
205 lines
8.2 KiB
Python
#!/usr/bin/env python
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# Copyright (C) 2015 OpenStack, LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# Manage Jenkins plugin module registry.
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import logging
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import operator
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import pkg_resources
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import re
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import yaml
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from jenkins_jobs.errors import JenkinsJobsException
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from jenkins_jobs.formatter import CustomFormatter
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logger = logging.getLogger(__name__)
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class ModuleRegistry(object):
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entry_points_cache = {}
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def __init__(self, config, plugins_list=None):
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self.modules = []
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self.modules_by_component_type = {}
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self.handlers = {}
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self.global_config = config
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if plugins_list is None:
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self.plugins_dict = {}
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else:
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self.plugins_dict = self._get_plugins_info_dict(plugins_list)
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for entrypoint in pkg_resources.iter_entry_points(
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group='jenkins_jobs.modules'):
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Mod = entrypoint.load()
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mod = Mod(self)
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self.modules.append(mod)
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self.modules.sort(key=operator.attrgetter('sequence'))
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if mod.component_type is not None:
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self.modules_by_component_type[mod.component_type] = mod
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@staticmethod
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def _get_plugins_info_dict(plugins_list):
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def mutate_plugin_info(plugin_info):
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"""
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We perform mutations on a single member of plugin_info here, then
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return a dictionary with the longName and shortName of the plugin
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mapped to its plugin info dictionary.
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"""
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version = plugin_info.get('version', '0')
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plugin_info['version'] = re.sub(r'(.*)-(?:SNAPSHOT|BETA)',
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r'\g<1>.preview', version)
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aliases = []
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for key in ['longName', 'shortName']:
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value = plugin_info.get(key, None)
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if value is not None:
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aliases.append(value)
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plugin_info_dict = {}
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for name in aliases:
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plugin_info_dict[name] = plugin_info
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return plugin_info_dict
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list_of_dicts = [mutate_plugin_info(v) for v in plugins_list]
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plugins_info_dict = {}
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for d in list_of_dicts:
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plugins_info_dict.update(d)
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return plugins_info_dict
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def get_plugin_info(self, plugin_name):
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""" This method is intended to provide information about plugins within
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a given module's implementation of Base.gen_xml. The return value is a
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dictionary with data obtained directly from a running Jenkins instance.
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This allows module authors to differentiate generated XML output based
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on information such as specific plugin versions.
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:arg string plugin_name: Either the shortName or longName of a plugin
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as see in a query that looks like:
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``http://<jenkins-hostname>/pluginManager/api/json?pretty&depth=2``
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During a 'test' run, it is possible to override JJB's query to a live
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Jenkins instance by passing it a path to a file containing a YAML list
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of dictionaries that mimics the plugin properties you want your test
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output to reflect::
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jenkins-jobs test -p /path/to/plugins-info.yaml
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Below is example YAML that might be included in
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/path/to/plugins-info.yaml.
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.. literalinclude:: /../../tests/cmd/fixtures/plugins-info.yaml
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"""
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return self.plugins_dict.get(plugin_name, {})
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def registerHandler(self, category, name, method):
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cat_dict = self.handlers.get(category, {})
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if not cat_dict:
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self.handlers[category] = cat_dict
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cat_dict[name] = method
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def getHandler(self, category, name):
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return self.handlers[category][name]
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def dispatch(self, component_type,
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parser, xml_parent,
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component, template_data={}):
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"""This is a method that you can call from your implementation of
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Base.gen_xml or component. It allows modules to define a type
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of component, and benefit from extensibility via Python
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entry points and Jenkins Job Builder :ref:`Macros <macro>`.
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:arg string component_type: the name of the component
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(e.g., `builder`)
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:arg YAMLParser parser: the global YAML Parser
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:arg Element xml_parent: the parent XML element
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:arg dict template_data: values that should be interpolated into
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the component definition
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See :py:class:`jenkins_jobs.modules.base.Base` for how to register
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components of a module.
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See the Publishers module for a simple example of how to use
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this method.
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"""
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if component_type not in self.modules_by_component_type:
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raise JenkinsJobsException("Unknown component type: "
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"'{0}'.".format(component_type))
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component_list_type = self.modules_by_component_type[component_type] \
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.component_list_type
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if isinstance(component, dict):
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# The component is a singleton dictionary of name: dict(args)
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name, component_data = next(iter(component.items()))
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if template_data:
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# Template data contains values that should be interpolated
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# into the component definition
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s = yaml.dump(component_data, default_flow_style=False)
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allow_empty_variables = self.global_config \
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and self.global_config.has_section('job_builder') \
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and self.global_config.has_option(
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'job_builder', 'allow_empty_variables') \
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and self.global_config.getboolean(
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'job_builder', 'allow_empty_variables')
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s = CustomFormatter(
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allow_empty_variables).format(s, **template_data)
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component_data = yaml.load(s)
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else:
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# The component is a simple string name, eg "run-tests"
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name = component
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component_data = {}
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# Look for a component function defined in an entry point
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eps = ModuleRegistry.entry_points_cache.get(component_list_type)
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if eps is None:
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module_eps = list(pkg_resources.iter_entry_points(
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group='jenkins_jobs.{0}'.format(component_list_type)))
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eps = {}
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for module_ep in module_eps:
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if module_ep.name in eps:
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raise JenkinsJobsException(
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"Duplicate entry point found for component type: "
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"'{0}', '{0}',"
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"name: '{1}'".format(component_type, name))
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eps[module_ep.name] = module_ep
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ModuleRegistry.entry_points_cache[component_list_type] = eps
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logger.debug("Cached entry point group %s = %s",
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component_list_type, eps)
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if name in eps:
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func = eps[name].load()
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func(parser, xml_parent, component_data)
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else:
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# Otherwise, see if it's defined as a macro
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component = parser.data.get(component_type, {}).get(name)
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if component:
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for b in component[component_list_type]:
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# Pass component_data in as template data to this function
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# so that if the macro is invoked with arguments,
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# the arguments are interpolated into the real defn.
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self.dispatch(component_type,
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parser, xml_parent, b, component_data)
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else:
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raise JenkinsJobsException("Unknown entry point or macro '{0}'"
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" for component type: '{1}'.".
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format(name, component_type))
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