391 lines
14 KiB
Python
391 lines
14 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 inspect
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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 types
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from six import PY2
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from jenkins_jobs.errors import JenkinsJobsException
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from jenkins_jobs.expander import Expander, ParamsExpander
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from jenkins_jobs.yaml_objects import BaseYamlObject
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__all__ = ["ModuleRegistry"]
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logger = logging.getLogger(__name__)
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getargspec = inspect.getargspec if PY2 else inspect.getfullargspec
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class ModuleRegistry(object):
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_entry_points_cache = {}
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_component_type_cache = {}
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def __init__(self, jjb_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.jjb_config = jjb_config
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self.masked_warned = {}
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self._macros = {}
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self._expander = Expander(jjb_config)
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self._params_expander = ParamsExpander(jjb_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(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] = entrypoint
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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(
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r"(.*)-(?:SNAPSHOT|BETA).*", r"\g<1>.preview", version
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)
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if isinstance(
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pkg_resources.parse_version(plugin_info["version"]),
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pkg_resources.extern.packaging.version.LegacyVersion,
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):
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plugin_info["version"] = plugin_info["version"].replace("-", "+")
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if isinstance(
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pkg_resources.parse_version(plugin_info["version"]),
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pkg_resources.extern.packaging.version.LegacyVersion,
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):
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plugin_name = plugin_info.get(
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"shortName", plugin_info.get("longName", None)
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)
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if plugin_name:
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logger.warning(
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"Version %s for plugin %s is being treated as a LegacyVersion"
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% (plugin_info["version"], plugin_name)
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)
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else:
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logger.warning(
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"Version %s is being treated as a LegacyVersion"
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% plugin_info["version"]
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)
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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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@staticmethod
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def _filter_kwargs(func, **kwargs):
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arg_spec = getargspec(func)
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for name in list(kwargs.keys()):
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if name not in arg_spec.args:
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del kwargs[name]
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return kwargs
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def get_plugin_info(self, plugin_name):
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"""Provide information about plugins within a module's impl of Base.gen_xml.
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The return value is a dictionary with data obtained directly from a
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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 str 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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@property
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def macros(self):
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return self._macros
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def set_macros(self, macros):
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self._macros = macros
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def amend_job_dicts(self, job_data_list):
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while True:
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changed = False
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for job in job_data_list:
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for module in self.modules:
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if module.amend_job_dict(job.data):
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changed = True
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if not changed:
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break
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def get_component_list_type(self, entry_point):
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if entry_point in self._component_type_cache:
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return self._component_type_cache[entry_point]
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# pkg_resources.EntryPoint.load() is costly, cache it.
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component_list_type = entry_point.load().component_list_type
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logging.info("Caching type %s of %s", component_list_type, entry_point)
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self._component_type_cache[entry_point] = component_list_type
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return component_list_type
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def dispatch(
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self,
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component_type,
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xml_parent,
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component,
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template_data={},
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job_data=None,
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component_pos=None,
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):
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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 str component_type: the name of the component
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(e.g., `builder`)
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:arg xml_parent: the parent XML element
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:arg component: component definition
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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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:arg dict job_data: full job 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(
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"Unknown component type: " "'{0}'.".format(component_type)
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)
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entry_point = self.modules_by_component_type[component_type]
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component_list_type = self.get_component_list_type(entry_point)
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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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paramdict = {}
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paramdict.update(template_data)
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paramdict.update(job_data or {})
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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 = self._entry_points_cache.get(component_list_type)
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if eps is None:
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eps = self._load_eps(
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component_list_type, component_type, entry_point, eps, name
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)
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macro_dict = self.macros.get(component_type, {})
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macro = macro_dict.get(name)
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if macro:
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try:
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self._dispatch_macro(
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component_data,
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component_type,
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eps,
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job_data,
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macro,
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name,
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xml_parent,
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)
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except JenkinsJobsException as x:
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if component_pos is not None:
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raise x.with_context(
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f"While expanding {component_type} macro call {name!r}",
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pos=component_pos,
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)
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else:
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raise
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elif name in eps:
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try:
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func = eps[name]
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kwargs = self._filter_kwargs(func, job_data=job_data)
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func(self, xml_parent, component_data, **kwargs)
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except JenkinsJobsException as x:
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raise x.with_context(
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f"In {component_type} {name!r}",
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pos=component.pos,
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)
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else:
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raise JenkinsJobsException(
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"Unknown entry point or macro '{0}' "
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"for component type: '{1}'.".format(name, component_type)
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)
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def _dispatch_macro(
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self, component_data, component_type, eps, job_data, macro, name, xml_parent
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):
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if name in eps and name not in self.masked_warned:
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self.masked_warned[name] = True
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logger.warning(
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"You have a macro ('%s') defined for '%s' "
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"component type that is masking an inbuilt "
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"definition" % (name, component_type)
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)
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# Expand macro strings only if at least one macro parameter is provided.
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if component_data:
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expander = self._params_expander
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else:
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expander = self._expander
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component_data = {} # It may be None.
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expander_params = {**component_data, **(job_data or {})}
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elements = macro.elements
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if isinstance(elements, BaseYamlObject):
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# Expand !j2-yaml element right below macro body.
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elements = elements.expand(expander, expander_params)
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for b in elements:
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try:
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element = expander.expand(b, expander_params)
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except JenkinsJobsException as x:
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raise x.with_context(
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f"While expanding macro {name!r}",
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pos=macro.pos,
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)
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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(
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component_type,
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xml_parent,
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element,
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component_data,
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job_data=job_data,
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)
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def _load_eps(self, component_list_type, component_type, entry_point, eps, name):
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logging.debug("Caching entrypoints for %s" % component_list_type)
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module_eps = []
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# auto build entry points by inferring from base component_types
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mod = pkg_resources.EntryPoint(
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"__all__", entry_point.module_name, dist=entry_point.dist
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)
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Mod = mod.load()
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func_eps = [
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Mod.__dict__.get(a)
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for a in dir(Mod)
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if isinstance(Mod.__dict__.get(a), types.FunctionType)
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]
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for func_ep in func_eps:
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try:
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# extract entry point based on docstring
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name_line = func_ep.__doc__.split("\n")
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if not name_line[0].startswith("yaml:"):
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logger.debug("Ignoring '%s' as an entry point" % name_line)
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continue
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ep_name = name_line[0].split(" ")[1]
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except (AttributeError, IndexError):
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# AttributeError by docstring not being defined as
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# a string to have split called on it.
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# IndexError raised by name_line not containing anything
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# after the 'yaml:' string.
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logger.debug(
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"Not including func '%s' as an entry point" % func_ep.__name__
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)
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continue
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module_eps.append(
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pkg_resources.EntryPoint(
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ep_name,
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entry_point.module_name,
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dist=entry_point.dist,
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attrs=(func_ep.__name__,),
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)
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)
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logger.debug(
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"Adding auto EP '%s=%s:%s'"
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% (ep_name, entry_point.module_name, func_ep.__name__)
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)
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# load from explicitly defined entry points
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module_eps.extend(
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list(
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pkg_resources.iter_entry_points(
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group="jenkins_jobs.{0}".format(component_list_type)
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)
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)
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)
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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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)
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eps[module_ep.name] = module_ep.load()
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# cache both sets of entry points
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self._entry_points_cache[component_list_type] = eps
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logger.debug("Cached entry point group %s = %s", component_list_type, eps)
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return eps
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