659 lines
25 KiB
Python
659 lines
25 KiB
Python
#!/usr/bin/env python
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# Copyright (C) 2012 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 jobs in Jenkins server
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import errno
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import os
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import sys
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import hashlib
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import yaml
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import json
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import xml.etree.ElementTree as XML
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import xml
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from xml.dom import minidom
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import jenkins
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import re
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import pkg_resources
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import logging
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import copy
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import itertools
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import fnmatch
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from jenkins_jobs.errors import JenkinsJobsException
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import local_yaml
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logger = logging.getLogger(__name__)
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MAGIC_MANAGE_STRING = "<!-- Managed by Jenkins Job Builder -->"
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# Python 2.6's minidom toprettyxml produces broken output by adding extraneous
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# whitespace around data. This patches the broken implementation with one taken
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# from 2.7
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def writexml(self, writer, indent="", addindent="", newl=""):
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# indent = current indentation
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# addindent = indentation to add to higher levels
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# newl = newline string
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writer.write(indent + "<" + self.tagName)
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attrs = self._get_attributes()
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a_names = attrs.keys()
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a_names.sort()
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for a_name in a_names:
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writer.write(" %s=\"" % a_name)
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minidom._write_data(writer, attrs[a_name].value)
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writer.write("\"")
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if self.childNodes:
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writer.write(">")
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if (len(self.childNodes) == 1 and
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self.childNodes[0].nodeType == minidom.Node.TEXT_NODE):
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self.childNodes[0].writexml(writer, '', '', '')
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else:
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writer.write(newl)
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for node in self.childNodes:
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node.writexml(writer, indent + addindent, addindent, newl)
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writer.write(indent)
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writer.write("</%s>%s" % (self.tagName, newl))
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else:
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writer.write("/>%s" % (newl))
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# PyXML xml.__name__ is _xmlplus. Check that if we don't have the default
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# system version of the minidom, then patch the writexml method
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if sys.version_info[:3] < (2, 7, 0) or xml.__name__ != 'xml':
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minidom.Element.writexml = writexml
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def deep_format(obj, paramdict):
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"""Apply the paramdict via str.format() to all string objects found within
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the supplied obj. Lists and dicts are traversed recursively."""
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# YAML serialisation was originally used to achieve this, but that places
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# limitations on the values in paramdict - the post-format result must
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# still be valid YAML (so substituting-in a string containing quotes, for
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# example, is problematic).
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if isinstance(obj, basestring):
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try:
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result = re.match('^{obj:(?P<key>\w+)}$', obj)
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if result is not None:
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ret = paramdict[result.group("key")]
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else:
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ret = obj.format(**paramdict)
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except KeyError as exc:
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missing_key = exc.message
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desc = "%s parameter missing to format %s\nGiven: %s" % (
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missing_key, obj, paramdict)
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raise JenkinsJobsException(desc)
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elif isinstance(obj, list):
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ret = []
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for item in obj:
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ret.append(deep_format(item, paramdict))
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elif isinstance(obj, dict):
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ret = {}
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for item in obj:
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ret[item.format(**paramdict)] = deep_format(obj[item], paramdict)
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else:
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ret = obj
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return ret
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def matches(what, glob_patterns):
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"""
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Checks if the given string, ``what``, matches any of the glob patterns in
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the iterable, ``glob_patterns``
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:arg str what: String that we want to test if it matches a pattern
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:arg iterable glob_patterns: glob patterns to match (list, tuple, set,
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etc.)
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"""
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return any(fnmatch.fnmatch(what, glob_pattern)
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for glob_pattern in glob_patterns)
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class YamlParser(object):
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def __init__(self, config=None):
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self.data = {}
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self.jobs = []
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self.config = config
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self.registry = ModuleRegistry(self.config)
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self.path = ["."]
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if self.config:
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if config.has_section('job_builder') and \
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config.has_option('job_builder', 'include_path'):
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self.path = config.get('job_builder',
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'include_path').split(':')
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def parse_fp(self, fp):
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data = local_yaml.load(fp, search_path=self.path)
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if data:
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if not isinstance(data, list):
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raise JenkinsJobsException(
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"The topmost collection in file '{fname}' must be a list,"
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" not a {cls}".format(fname=getattr(fp, 'name', fp),
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cls=type(data)))
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for item in data:
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cls, dfn = item.items()[0]
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group = self.data.get(cls, {})
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if len(item.items()) > 1:
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n = None
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for k, v in item.items():
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if k == "name":
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n = v
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break
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# Syntax error
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raise JenkinsJobsException("Syntax error, for item "
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"named '{0}'. Missing indent?"
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.format(n))
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name = dfn['name']
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group[name] = dfn
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self.data[cls] = group
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def parse(self, fn):
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with open(fn) as fp:
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self.parse_fp(fp)
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def getJob(self, name):
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job = self.data.get('job', {}).get(name, None)
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if not job:
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return job
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return self.applyDefaults(job)
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def getJobGroup(self, name):
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return self.data.get('job-group', {}).get(name, None)
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def getJobTemplate(self, name):
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job = self.data.get('job-template', {}).get(name, None)
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if not job:
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return job
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return self.applyDefaults(job)
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def applyDefaults(self, data):
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whichdefaults = data.get('defaults', 'global')
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defaults = self.data.get('defaults', {}).get(whichdefaults, {})
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if defaults == {} and whichdefaults != 'global':
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raise JenkinsJobsException("Unknown defaults set: '{0}'"
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.format(whichdefaults))
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newdata = {}
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newdata.update(defaults)
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newdata.update(data)
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return newdata
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def generateXML(self, jobs_filter=None):
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changed = True
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while changed:
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changed = False
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for module in self.registry.modules:
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if hasattr(module, 'handle_data'):
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if module.handle_data(self):
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changed = True
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for job in self.data.get('job', {}).values():
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if jobs_filter and not matches(job['name'], jobs_filter):
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logger.debug("Ignoring job {0}".format(job['name']))
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continue
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logger.debug("XMLifying job '{0}'".format(job['name']))
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job = self.applyDefaults(job)
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self.getXMLForJob(job)
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for project in self.data.get('project', {}).values():
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logger.debug("XMLifying project '{0}'".format(project['name']))
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for jobspec in project.get('jobs', []):
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if isinstance(jobspec, dict):
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# Singleton dict containing dict of job-specific params
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jobname, jobparams = jobspec.items()[0]
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if not isinstance(jobparams, dict):
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jobparams = {}
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else:
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jobname = jobspec
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jobparams = {}
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job = self.getJob(jobname)
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if job:
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# Just naming an existing defined job
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continue
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# see if it's a job group
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group = self.getJobGroup(jobname)
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if group:
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for group_jobspec in group['jobs']:
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if isinstance(group_jobspec, dict):
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group_jobname, group_jobparams = \
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group_jobspec.items()[0]
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if not isinstance(group_jobparams, dict):
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group_jobparams = {}
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else:
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group_jobname = group_jobspec
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group_jobparams = {}
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job = self.getJob(group_jobname)
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if job:
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continue
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template = self.getJobTemplate(group_jobname)
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# Allow a group to override parameters set by a project
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d = {}
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d.update(project)
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d.update(jobparams)
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d.update(group)
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d.update(group_jobparams)
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# Except name, since the group's name is not useful
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d['name'] = project['name']
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if template:
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self.getXMLForTemplateJob(d, template, jobs_filter)
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continue
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# see if it's a template
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template = self.getJobTemplate(jobname)
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if template:
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d = {}
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d.update(project)
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d.update(jobparams)
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self.getXMLForTemplateJob(d, template, jobs_filter)
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else:
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raise JenkinsJobsException("Failed to find suitable "
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"template named '{0}'"
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.format(jobname))
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def getXMLForTemplateJob(self, project, template, jobs_filter=None):
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dimensions = []
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for (k, v) in project.items():
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if type(v) == list and k not in ['jobs']:
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dimensions.append(zip([k] * len(v), v))
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# XXX somewhat hackish to ensure we actually have a single
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# pass through the loop
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if len(dimensions) == 0:
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dimensions = [(("", ""),)]
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checksums = set([])
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for values in itertools.product(*dimensions):
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params = copy.deepcopy(project)
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params = self.applyDefaults(params)
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expanded_values = {}
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for (k, v) in values:
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if isinstance(v, dict):
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inner_key = v.iterkeys().next()
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expanded_values[k] = inner_key
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expanded_values.update(v[inner_key])
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else:
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expanded_values[k] = v
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params.update(expanded_values)
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expanded = deep_format(template, params)
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# Keep track of the resulting expansions to avoid
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# regenerating the exact same job. Whenever a project has
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# different values for a parameter and that parameter is not
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# used in the template, we ended up regenerating the exact
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# same job.
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# To achieve that we serialize the expanded template making
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# sure the dict keys are always in the same order. Then we
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# record the checksum in an unordered unique set which let
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# us guarantee a group of parameters will not be added a
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# second time.
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uniq = json.dumps(expanded, sort_keys=True)
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checksum = hashlib.md5(uniq).hexdigest()
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# Lookup the checksum
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if checksum not in checksums:
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# We also want to skip XML generation whenever the user did
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# not ask for that job.
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job_name = expanded.get('name')
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if jobs_filter and not matches(job_name, jobs_filter):
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continue
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logger.debug("Generating XML for template job {0}"
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" (params {1})".format(
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template['name'], params))
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self.getXMLForJob(expanded)
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checksums.add(checksum)
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def getXMLForJob(self, data):
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kind = data.get('project-type', 'freestyle')
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keep_desc = False
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if self.config:
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if self.config.has_section('job_builder') and \
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self.config.has_option('job_builder', 'keep_descriptions'):
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keep_desc = self.config.getboolean('job_builder',
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'keep_descriptions')
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if keep_desc:
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description = data.get("description", None)
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else:
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description = data.get("description", '')
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if description is not None:
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data["description"] = description + \
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self.get_managed_string().lstrip()
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for ep in pkg_resources.iter_entry_points(
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group='jenkins_jobs.projects', name=kind):
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Mod = ep.load()
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mod = Mod(self.registry)
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xml = mod.root_xml(data)
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self.gen_xml(xml, data)
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job = XmlJob(xml, data['name'])
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self.jobs.append(job)
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break
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def gen_xml(self, xml, data):
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for module in self.registry.modules:
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if hasattr(module, 'gen_xml'):
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module.gen_xml(self, xml, data)
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def get_managed_string(self):
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# The \n\n is not hard coded, because they get stripped if the
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# project does not otherwise have a description.
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return "\n\n" + MAGIC_MANAGE_STRING
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class ModuleRegistry(object):
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entry_points_cache = {}
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def __init__(self, config):
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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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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(lambda a, b: cmp(a.sequence, b.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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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 = component.items()[0]
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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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s = s.format(**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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cache_key = '%s:%s' % (component_list_type, name)
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eps = ModuleRegistry.entry_points_cache.get(cache_key)
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if eps is None:
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eps = list(pkg_resources.iter_entry_points(
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group='jenkins_jobs.{0}'.format(component_list_type),
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name=name))
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if len(eps) > 1:
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raise JenkinsJobsException(
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"Duplicate entry point found for component type: '{0}',"
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"name: '{1}'".format(component_type, name))
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elif len(eps) == 1:
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ModuleRegistry.entry_points_cache[cache_key] = eps
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logger.debug("Cached entry point %s = %s", cache_key,
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ModuleRegistry.entry_points_cache[cache_key])
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if len(eps) == 1:
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func = eps[0].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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class XmlJob(object):
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def __init__(self, xml, name):
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self.xml = xml
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self.name = name
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def md5(self):
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return hashlib.md5(self.output()).hexdigest()
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def output(self):
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out = minidom.parseString(XML.tostring(self.xml, encoding='UTF-8'))
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return out.toprettyxml(indent=' ', encoding='utf-8')
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class CacheStorage(object):
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def __init__(self, jenkins_url, flush=False):
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cache_dir = self.get_cache_dir()
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# One cache per remote Jenkins URL:
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host_vary = re.sub('[^A-Za-z0-9\-\~]', '_', jenkins_url)
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self.cachefilename = os.path.join(
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cache_dir, 'cache-host-jobs-' + host_vary + '.yml')
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if flush or not os.path.isfile(self.cachefilename):
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self.data = {}
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return
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with file(self.cachefilename, 'r') as yfile:
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self.data = yaml.load(yfile)
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logger.debug("Using cache: '{0}'".format(self.cachefilename))
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@staticmethod
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def get_cache_dir():
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home = os.path.expanduser('~')
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if home == '~':
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raise OSError('Could not locate home folder')
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xdg_cache_home = os.environ.get('XDG_CACHE_HOME') or \
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os.path.join(home, '.cache')
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path = os.path.join(xdg_cache_home, 'jenkins_jobs')
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if not os.path.isdir(path):
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os.makedirs(path)
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return path
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def set(self, job, md5):
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self.data[job] = md5
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yfile = file(self.cachefilename, 'w')
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yaml.dump(self.data, yfile)
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yfile.close()
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def is_cached(self, job):
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if job in self.data:
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return True
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return False
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|
def has_changed(self, job, md5):
|
|
if job in self.data and self.data[job] == md5:
|
|
return False
|
|
return True
|
|
|
|
|
|
class Jenkins(object):
|
|
def __init__(self, url, user, password):
|
|
self.jenkins = jenkins.Jenkins(url, user, password)
|
|
|
|
def update_job(self, job_name, xml):
|
|
if self.is_job(job_name):
|
|
logger.info("Reconfiguring jenkins job {0}".format(job_name))
|
|
self.jenkins.reconfig_job(job_name, xml)
|
|
else:
|
|
logger.info("Creating jenkins job {0}".format(job_name))
|
|
self.jenkins.create_job(job_name, xml)
|
|
|
|
def is_job(self, job_name):
|
|
return self.jenkins.job_exists(job_name)
|
|
|
|
def get_job_md5(self, job_name):
|
|
xml = self.jenkins.get_job_config(job_name)
|
|
return hashlib.md5(xml).hexdigest()
|
|
|
|
def delete_job(self, job_name):
|
|
if self.is_job(job_name):
|
|
logger.info("Deleting jenkins job {0}".format(job_name))
|
|
self.jenkins.delete_job(job_name)
|
|
|
|
def get_jobs(self):
|
|
return self.jenkins.get_jobs()
|
|
|
|
def is_managed(self, job_name):
|
|
xml = self.jenkins.get_job_config(job_name)
|
|
try:
|
|
out = XML.fromstring(xml)
|
|
description = out.find(".//description").text
|
|
return description.endswith(MAGIC_MANAGE_STRING)
|
|
except (TypeError, AttributeError):
|
|
pass
|
|
return False
|
|
|
|
|
|
class Builder(object):
|
|
def __init__(self, jenkins_url, jenkins_user, jenkins_password,
|
|
config=None, ignore_cache=False, flush_cache=False):
|
|
self.jenkins = Jenkins(jenkins_url, jenkins_user, jenkins_password)
|
|
self.cache = CacheStorage(jenkins_url, flush=flush_cache)
|
|
self.global_config = config
|
|
self.ignore_cache = ignore_cache
|
|
|
|
def load_files(self, fn):
|
|
self.parser = YamlParser(self.global_config)
|
|
|
|
if hasattr(fn, 'read'):
|
|
self.parser.parse_fp(fn)
|
|
return
|
|
|
|
if os.path.isdir(fn):
|
|
files_to_process = [os.path.join(fn, f)
|
|
for f in os.listdir(fn)
|
|
if (f.endswith('.yml') or f.endswith('.yaml'))]
|
|
else:
|
|
files_to_process = [fn]
|
|
|
|
for in_file in files_to_process:
|
|
logger.debug("Parsing YAML file {0}".format(in_file))
|
|
self.parser.parse(in_file)
|
|
|
|
def delete_old_managed(self, keep):
|
|
jobs = self.jenkins.get_jobs()
|
|
for job in jobs:
|
|
if job['name'] not in keep and \
|
|
self.jenkins.is_managed(job['name']):
|
|
logger.info("Removing obsolete jenkins job {0}"
|
|
.format(job['name']))
|
|
self.delete_job(job['name'])
|
|
else:
|
|
logger.debug("Ignoring unmanaged jenkins job %s",
|
|
job['name'])
|
|
|
|
def delete_job(self, glob_name, fn=None):
|
|
if fn:
|
|
self.load_files(fn)
|
|
self.parser.generateXML(glob_name)
|
|
jobs = [j.name
|
|
for j in self.parser.jobs
|
|
if matches(j.name, [glob_name])]
|
|
else:
|
|
jobs = [glob_name]
|
|
for job in jobs:
|
|
self.jenkins.delete_job(job)
|
|
if(self.cache.is_cached(job)):
|
|
self.cache.set(job, '')
|
|
|
|
def delete_all_jobs(self):
|
|
jobs = self.jenkins.get_jobs()
|
|
for job in jobs:
|
|
self.delete_job(job['name'])
|
|
|
|
def update_job(self, input_fn, names=None, output=None):
|
|
self.load_files(input_fn)
|
|
self.parser.generateXML(names)
|
|
|
|
self.parser.jobs.sort(lambda a, b: cmp(a.name, b.name))
|
|
|
|
for job in self.parser.jobs:
|
|
if names and not matches(job.name, names):
|
|
continue
|
|
if output:
|
|
if hasattr(output, 'write'):
|
|
# `output` is a file-like object
|
|
logger.debug("Writing XML to '{0}'".format(output))
|
|
try:
|
|
output.write(job.output())
|
|
except IOError as exc:
|
|
if exc.errno == errno.EPIPE:
|
|
# EPIPE could happen if piping output to something
|
|
# that doesn't read the whole input (e.g.: the UNIX
|
|
# `head` command)
|
|
return
|
|
raise
|
|
continue
|
|
|
|
output_dir = output
|
|
|
|
try:
|
|
os.makedirs(output_dir)
|
|
except OSError:
|
|
if not os.path.isdir(output_dir):
|
|
raise
|
|
|
|
output_fn = os.path.join(output_dir, job.name)
|
|
logger.debug("Writing XML to '{0}'".format(output_fn))
|
|
f = open(output_fn, 'w')
|
|
f.write(job.output())
|
|
f.close()
|
|
continue
|
|
md5 = job.md5()
|
|
if (self.jenkins.is_job(job.name)
|
|
and not self.cache.is_cached(job.name)):
|
|
old_md5 = self.jenkins.get_job_md5(job.name)
|
|
self.cache.set(job.name, old_md5)
|
|
|
|
if self.cache.has_changed(job.name, md5) or self.ignore_cache:
|
|
self.jenkins.update_job(job.name, job.output())
|
|
self.cache.set(job.name, md5)
|
|
else:
|
|
logger.debug("'{0}' has not changed".format(job.name))
|
|
return self.parser.jobs
|