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#!/usr/bin/env python
# Copyright (C) 2015 OpenStack, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# Manage Jenkins plugin module registry.
import logging
import operator
import pkg_resources
import re
import types
from jenkins_jobs.errors import JenkinsJobsException
from jenkins_jobs.formatter import deep_format
from jenkins_jobs.local_yaml import Jinja2Loader
__all__ = ["ModuleRegistry"]
logger = logging.getLogger(__name__)
class ModuleRegistry(object):
_entry_points_cache = {}
_component_type_cache = {}
def __init__(self, jjb_config, plugins_list=None):
self.modules = []
self.modules_by_component_type = {}
self.handlers = {}
self.jjb_config = jjb_config
self.masked_warned = {}
if plugins_list is None:
self.plugins_dict = {}
else:
self.plugins_dict = self._get_plugins_info_dict(plugins_list)
for entrypoint in pkg_resources.iter_entry_points(group="jenkins_jobs.modules"):
Mod = entrypoint.load()
mod = Mod(self)
self.modules.append(mod)
self.modules.sort(key=operator.attrgetter("sequence"))
if mod.component_type is not None:
self.modules_by_component_type[mod.component_type] = entrypoint
@staticmethod
def _get_plugins_info_dict(plugins_list):
def mutate_plugin_info(plugin_info):
"""
We perform mutations on a single member of plugin_info here, then
return a dictionary with the longName and shortName of the plugin
mapped to its plugin info dictionary.
"""
version = plugin_info.get("version", "0")
plugin_info["version"] = re.sub(
r"(.*)-(?:SNAPSHOT|BETA).*", r"\g<1>.preview", version
)
aliases = []
for key in ["longName", "shortName"]:
value = plugin_info.get(key, None)
if value is not None:
aliases.append(value)
plugin_info_dict = {}
for name in aliases:
plugin_info_dict[name] = plugin_info
return plugin_info_dict
list_of_dicts = [mutate_plugin_info(v) for v in plugins_list]
plugins_info_dict = {}
for d in list_of_dicts:
plugins_info_dict.update(d)
return plugins_info_dict
def get_plugin_info(self, plugin_name):
""" This method is intended to provide information about plugins within
a given module's implementation of Base.gen_xml. The return value is a
dictionary with data obtained directly from a running Jenkins instance.
This allows module authors to differentiate generated XML output based
on information such as specific plugin versions.
:arg string plugin_name: Either the shortName or longName of a plugin
as see in a query that looks like:
``http://<jenkins-hostname>/pluginManager/api/json?pretty&depth=2``
During a 'test' run, it is possible to override JJB's query to a live
Jenkins instance by passing it a path to a file containing a YAML list
of dictionaries that mimics the plugin properties you want your test
output to reflect::
jenkins-jobs test -p /path/to/plugins-info.yaml
Below is example YAML that might be included in
/path/to/plugins-info.yaml.
.. literalinclude:: /../../tests/cmd/fixtures/plugins-info.yaml
"""
return self.plugins_dict.get(plugin_name, {})
def registerHandler(self, category, name, method):
cat_dict = self.handlers.get(category, {})
if not cat_dict:
self.handlers[category] = cat_dict
cat_dict[name] = method
def getHandler(self, category, name):
return self.handlers[category][name]
@property
def parser_data(self):
return self.__parser_data
def set_parser_data(self, parser_data):
self.__parser_data = parser_data
def get_component_list_type(self, entry_point):
if entry_point in self._component_type_cache:
return self._component_type_cache[entry_point]
# pkg_resources.EntryPoint.load() is costly, cache it.
component_list_type = entry_point.load().component_list_type
logging.info("Caching type %s of %s", component_list_type, entry_point)
self._component_type_cache[entry_point] = component_list_type
return component_list_type
def dispatch(self, component_type, xml_parent, component, template_data={}):
"""This is a method that you can call from your implementation of
Base.gen_xml or component. It allows modules to define a type
of component, and benefit from extensibility via Python
entry points and Jenkins Job Builder :ref:`Macros <macro>`.
:arg string component_type: the name of the component
(e.g., `builder`)
:arg YAMLParser parser: the global YAML Parser
:arg Element xml_parent: the parent XML element
:arg dict template_data: values that should be interpolated into
the component definition
See :py:class:`jenkins_jobs.modules.base.Base` for how to register
components of a module.
See the Publishers module for a simple example of how to use
this method.
"""
if component_type not in self.modules_by_component_type:
raise JenkinsJobsException(
"Unknown component type: " "'{0}'.".format(component_type)
)
entry_point = self.modules_by_component_type[component_type]
component_list_type = self.get_component_list_type(entry_point)
if isinstance(component, dict):
# The component is a singleton dictionary of name: dict(args)
name, component_data = next(iter(component.items()))
if template_data or isinstance(component_data, Jinja2Loader):
# Template data contains values that should be interpolated
# into the component definition. To handle Jinja2 templates
# that don't contain any variables, we also deep format those.
try:
component_data = deep_format(
component_data,
template_data,
self.jjb_config.yamlparser["allow_empty_variables"],
)
except Exception:
logging.error(
"Failure formatting component ('%s') data '%s'",
name,
component_data,
)
raise
else:
# The component is a simple string name, eg "run-tests"
name = component
component_data = {}
# Look for a component function defined in an entry point
eps = self._entry_points_cache.get(component_list_type)
if eps is None:
logging.debug("Caching entrypoints for %s" % component_list_type)
module_eps = []
# auto build entry points by inferring from base component_types
mod = pkg_resources.EntryPoint(
"__all__", entry_point.module_name, dist=entry_point.dist
)
Mod = mod.load()
func_eps = [
Mod.__dict__.get(a)
for a in dir(Mod)
if isinstance(Mod.__dict__.get(a), types.FunctionType)
]
for func_ep in func_eps:
try:
# extract entry point based on docstring
name_line = func_ep.__doc__.split("\n")
if not name_line[0].startswith("yaml:"):
logger.debug("Ignoring '%s' as an entry point" % name_line)
continue
ep_name = name_line[0].split(" ")[1]
except (AttributeError, IndexError):
# AttributeError by docstring not being defined as
# a string to have split called on it.
# IndexError raised by name_line not containing anything
# after the 'yaml:' string.
logger.debug(
"Not including func '%s' as an entry point" % func_ep.__name__
)
continue
module_eps.append(
pkg_resources.EntryPoint(
ep_name,
entry_point.module_name,
dist=entry_point.dist,
attrs=(func_ep.__name__,),
)
)
logger.debug(
"Adding auto EP '%s=%s:%s'"
% (ep_name, entry_point.module_name, func_ep.__name__)
)
# load from explicitly defined entry points
module_eps.extend(
list(
pkg_resources.iter_entry_points(
group="jenkins_jobs.{0}".format(component_list_type)
)
)
)
eps = {}
for module_ep in module_eps:
if module_ep.name in eps:
raise JenkinsJobsException(
"Duplicate entry point found for component type: "
"'{0}', '{0}',"
"name: '{1}'".format(component_type, name)
)
eps[module_ep.name] = module_ep.load()
# cache both sets of entry points
self._entry_points_cache[component_list_type] = eps
logger.debug("Cached entry point group %s = %s", component_list_type, eps)
# check for macro first
component = self.parser_data.get(component_type, {}).get(name)
if component:
if name in eps and name not in self.masked_warned:
self.masked_warned[name] = True
logger.warning(
"You have a macro ('%s') defined for '%s' "
"component type that is masking an inbuilt "
"definition" % (name, component_type)
)
for b in component[component_list_type]:
# Pass component_data in as template data to this function
# so that if the macro is invoked with arguments,
# the arguments are interpolated into the real defn.
self.dispatch(component_type, xml_parent, b, component_data)
elif name in eps:
func = eps[name]
func(self, xml_parent, component_data)
else:
raise JenkinsJobsException(
"Unknown entry point or macro '{0}' "
"for component type: '{1}'.".format(name, component_type)
)
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