#!/usr/bin/env python # Copyright (C) 2015 Wayne Warren # # 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 JJB Configuration sources, defaults, and access. from collections import defaultdict import io import logging import os from six.moves import configparser, StringIO from jenkins_jobs import builder from jenkins_jobs.errors import JJBConfigException from jenkins_jobs.errors import JenkinsJobsException __all__ = [ "JJBConfig" ] logger = logging.getLogger(__name__) DEFAULT_CONF = """ [job_builder] keep_descriptions=False ignore_cache=False recursive=False exclude=.* allow_duplicates=False allow_empty_variables=False [jenkins] url=http://localhost:8080/ query_plugins_info=True [hipchat] authtoken=dummy send-as=Jenkins """ CONFIG_REQUIRED_MESSAGE = ("A valid configuration file is required. " "No configuration file passed.") class JJBConfig(object): def __init__(self, config_filename=None, config_file_required=False): """ The JJBConfig class is intended to encapsulate and resolve priority between all sources of configuration for the JJB library. This allows the various sources of configuration to provide a consistent accessor interface regardless of where they are used. It also allows users of JJB-as-an-API to create minimally valid configuration and easily make minor modifications to default values without strictly adhering to the confusing setup (see the _setup method, the behavior of which largely lived in the cmd.execute method previously) necessary for the jenkins-jobs command line tool. :arg str config_filename: Name of configuration file on which to base this config object. :arg bool config_file_required: Allows users of the JJBConfig class to decide whether or not it's really necessary for a config file to be passed in when creating an instance. This has two effects on the behavior of JJBConfig initialization: * It determines whether or not we try "local" and "global" config files. * It determines whether or not failure to read some config file will raise an exception or simply print a warning message indicating that no config file was found. """ config_parser = self._init_defaults() global_conf = '/etc/jenkins_jobs/jenkins_jobs.ini' user_conf = os.path.join(os.path.expanduser('~'), '.config', 'jenkins_jobs', 'jenkins_jobs.ini') local_conf = os.path.join(os.path.dirname(__file__), 'jenkins_jobs.ini') conf = None if config_filename is not None: conf = config_filename else: if os.path.isfile(local_conf): conf = local_conf elif os.path.isfile(user_conf): conf = user_conf else: conf = global_conf if config_file_required and conf is None: raise JJBConfigException(CONFIG_REQUIRED_MESSAGE) config_fp = None if conf is not None: try: config_fp = self._read_config_file(conf) except JJBConfigException: if config_file_required: raise JJBConfigException(CONFIG_REQUIRED_MESSAGE) else: logger.warn("Config file, {0}, not found. Using default " "config values.".format(conf)) if config_fp is not None: config_parser.readfp(config_fp) self.config_parser = config_parser self.ignore_cache = False self.flush_cache = False self.user = None self.password = None self.plugins_info = None self.timeout = builder._DEFAULT_TIMEOUT self.allow_empty_variables = None self.jenkins = defaultdict(None) self.builder = defaultdict(None) self.yamlparser = defaultdict(None) self.hipchat = defaultdict(None) self._setup() def _init_defaults(self): """ Initialize default configuration values using DEFAULT_CONF """ config = configparser.ConfigParser() # Load default config always config.readfp(StringIO(DEFAULT_CONF)) return config def _read_config_file(self, config_filename): """ Given path to configuration file, read it in as a ConfigParser object and return that object. """ if os.path.isfile(config_filename): self.__config_file = config_filename # remember file we read from logger.debug("Reading config from {0}".format(config_filename)) config_fp = io.open(config_filename, 'r', encoding='utf-8') else: raise JJBConfigException("""A valid configuration file is required. \n{0} is not valid.""".format(config_filename)) return config_fp def _setup(self): config = self.config_parser logger.debug("Config: {0}".format(config)) # check the ignore_cache setting if config.has_option('jenkins', 'ignore_cache'): logging.warn('''ignore_cache option should be moved to the [job_builder] section in the config file, the one specified in the [jenkins] section will be ignored in the future''') self.ignore_cache = config.getboolean('jenkins', 'ignore_cache') elif config.has_option('job_builder', 'ignore_cache'): self.ignore_cache = config.getboolean('job_builder', 'ignore_cache') # check the flush_cache setting if config.has_option('job_builder', 'flush_cache'): self.flush_cache = config.getboolean('job_builder', 'flush_cache') # Jenkins supports access as an anonymous user, which can be used to # ensure read-only behaviour when querying the version of plugins # installed for test mode to generate XML output matching what will be # uploaded. To enable must pass 'None' as the value for user and # password to python-jenkins # # catching 'TypeError' is a workaround for python 2.6 interpolation # error # https://bugs.launchpad.net/openstack-ci/+bug/1259631 try: self.user = config.get('jenkins', 'user') except (TypeError, configparser.NoOptionError): pass try: self.password = config.get('jenkins', 'password') except (TypeError, configparser.NoOptionError): pass # None -- no timeout, blocking mode; same as setblocking(True) # 0.0 -- non-blocking mode; same as setblocking(False) <--- default # > 0 -- timeout mode; operations time out after timeout seconds # < 0 -- illegal; raises an exception # to retain the default must use # "timeout=jenkins_jobs.builder._DEFAULT_TIMEOUT" or not set timeout at # all. try: self.timeout = config.getfloat('jenkins', 'timeout') except (ValueError): raise JenkinsJobsException("Jenkins timeout config is invalid") except (TypeError, configparser.NoOptionError): pass if not config.getboolean("jenkins", "query_plugins_info"): logger.debug("Skipping plugin info retrieval") self.plugins_info = [] self.recursive = config.getboolean('job_builder', 'recursive') self.excludes = config.get('job_builder', 'exclude').split(os.pathsep) # The way we want to do things moving forward: self.jenkins['url'] = config.get('jenkins', 'url') self.jenkins['user'] = self.user self.jenkins['password'] = self.password self.jenkins['timeout'] = self.timeout self.builder['ignore_cache'] = self.ignore_cache self.builder['flush_cache'] = self.flush_cache self.builder['plugins_info'] = self.plugins_info # keep descriptions ? (used by yamlparser) keep_desc = False if (config and config.has_section('job_builder') and config.has_option('job_builder', 'keep_descriptions')): keep_desc = config.getboolean('job_builder', 'keep_descriptions') self.yamlparser['keep_descriptions'] = keep_desc # figure out the include path (used by yamlparser) path = ["."] if (config and config.has_section('job_builder') and config.has_option('job_builder', 'include_path')): path = config.get('job_builder', 'include_path').split(':') self.yamlparser['include_path'] = path # allow duplicates? allow_duplicates = False if config and config.has_option('job_builder', 'allow_duplicates'): allow_duplicates = config.getboolean('job_builder', 'allow_duplicates') self.yamlparser['allow_duplicates'] = allow_duplicates # allow empty variables? self.yamlparser['allow_empty_variables'] = ( self.allow_empty_variables or config and config.has_section('job_builder') and config.has_option('job_builder', 'allow_empty_variables') and config.getboolean('job_builder', 'allow_empty_variables')) def validate(self): config = self.config_parser # Inform the user as to what is likely to happen, as they may specify # a real jenkins instance in test mode to get the plugin info to check # the XML generated. if self.jenkins['user'] is None and self.jenkins['password'] is None: logger.info("Will use anonymous access to Jenkins if needed.") elif ((self.jenkins['user'] is not None and self.jenkins['password'] is None) or (self.jenkins['user'] is None and self.jenkins['password'] is not None)): raise JenkinsJobsException( "Cannot authenticate to Jenkins with only one of User and " "Password provided, please check your configuration." ) if (self.builder['plugins_info'] is not None and not isinstance(self.builder['plugins_info'], list)): raise JenkinsJobsException("plugins_info must contain a list!") # Temporary until yamlparser is refactored to query config object if self.yamlparser['allow_empty_variables'] is not None: config.set('job_builder', 'allow_empty_variables', str(self.yamlparser['allow_empty_variables'])) def get_module_config(self, section, key): """ Given a section name and a key value, return the value assigned to the key in the JJB .ini file if it exists, otherwise emit a warning indicating that the value is not set. Default value returned if no value is set in the file will be a blank string. """ result = '' try: result = self.config_parser.get( section, key ) except (configparser.NoSectionError, configparser.NoOptionError, JenkinsJobsException) as e: logger.warning("You didn't set a " + key + " neither in the yaml job definition nor in" + " the " + section + " section, blank default" + " value will be applied:\n{0}".format(e)) return result