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#!/usr/bin/env python3
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# Copyright (C) 2019 Simon Quigley <tsimonq2@lubuntu.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import git
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from os import getenv, path
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from yaml import CLoader
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from yaml import load as yaml_load
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from jinja2 import Template
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from shutil import rmtree
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from tempfile import mkdtemp
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from jenkinsapi.jenkins import Jenkins
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class Generator:
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def clone_metadata(self):
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"""Clone the metadata repository using the values set in the env vars
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The METADATA_URL and METADATA_REPO_NAME env vars must be set to use
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this function.
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The repository must have a ci.conf file in YAML format.
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This uses Git to clone the given repository - other VCSes are not
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supported at this time.
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"""
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# Assuming this is ran inside Jenkins, this fetches the env vars set in
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# the job config. If those don't exist, we need to throw an error,
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# because otherwise we have no metadata to actually pull from
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metadata_url = getenv("METADATA_URL")
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metadata_repo_name = getenv("METADATA_REPO_NAME")
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if not metadata_url or not metadata_repo_name:
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raise ValueError("METADATA_URL and METADATA_REPO_NAME must be set")
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# Create a temporary directory in the most secure manner possible and
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# clone the metadata, throwing the directory away when we're done
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try:
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metadata_loc = mkdtemp()
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git.Git(metadata_loc).clone(metadata_url)
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# Load ci.conf and parse it
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config_file = path.join(metadata_loc,
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metadata_repo_name,
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"ci.conf")
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with open(config_file) as metadata_conf_file:
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metadata_conf = yaml_load(metadata_conf_file, Loader=CLoader)
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finally:
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rmtree(metadata_loc)
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return metadata_conf
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def parse_metadata(self):
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"""Parse the data pulled from clone_metadata
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Allow the user to be able to set default key values, resulting in
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shorter and cleaner configuration files.
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"""
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metadata_conf = self.clone_metadata()
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metadata_req_keys = ["name", "packaging_url",
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"packaging_branch_unstable",
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"packaging_branch_stable",
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"upload_target_unstable", "upload_target_stable",
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"releases", "default_branch"]
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metadata_opt_keys = ["upstream_url", "upstream_branch"]
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for package in metadata_conf["repositories"]:
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# Load defaults in if they're not there, ignore the optional ones
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for mkey in metadata_req_keys:
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if mkey not in package and mkey in metadata_conf["default"]:
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package[mkey] = metadata_conf["default"][mkey]
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# Don't proceed if any of the keys in the config are invalid
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for mkey in package:
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if mkey not in metadata_req_keys and mkey not in \
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metadata_opt_keys:
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raise ValueError("Invalid key present:", mkey)
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return metadata_conf["repositories"]
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def auth_jenkins_server(self):
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"""Authenticate to the Jenkins server
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This involves use of the API_SITE, API_USER, and API_KEY variables
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set in Jenkins. These need to be private, so they are defined in the
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system-wide Jenkins credential storage.
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"""
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# Load the API values from the environment variables
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api_site = getenv("API_SITE")
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api_user = getenv("API_USER")
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api_key = getenv("API_KEY")
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for envvar in [api_site, api_user, api_key]:
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if not envvar:
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raise ValueError("API_SITE, API_USER, and API_KEY must be",
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"defined")
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# Authenticate to the server
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server = Jenkins(api_site, username=api_user, password=api_key)
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return server
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def load_config(self, job_type, data=None):
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"""Return a template that is a result of loading the data
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This makes it easier to standardize several types of jobs
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"""
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# The template name should always correspond with the job type
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# Regardless of the job type, there should always be a template
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template_path = path.join("templates",
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job_type + ".xml")
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with open(template_path) as templatef:
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template = ""
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for text in templatef.readlines():
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template += text
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template = Template(template)
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if data:
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url = data["packaging_url"]
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u_branch = data["packaging_branch_unstable"]
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s_branch = data["packaging_branch_stable"]
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u_upload_target = data["upload_target_unstable"]
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s_upload_target = data["upload_target_stable"]
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if job_type.startswith("package"):
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upstream = data["upstream_url"]
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package_config = template.render(PACKAGING_URL=url,
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PACKAGING_BRANCH_U=u_branch,
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PACKAGING_BRANCH_S=s_branch,
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UPSTREAM_URL=upstream,
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NAME=data["name"],
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RELEASE=data["release"],
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UPLOAD_TARGET_U=u_upload_target,
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UPLOAD_TARGET_S=s_upload_target)
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elif job_type == "merger":
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default_branch = data["default_branch"]
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# HACKY HACKY HACKY
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# If we can't push to it, the merger job is useless
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if not "phab.lubuntu.me" in url:
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with open(path.join("templates", "useless-merger.xml")) as f:
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package_config = ""
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for text in f.readlines():
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package_config += text
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print(package_config)
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else:
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package_config = template.render(PACKAGING_URL=url,
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PACKAGING_BRANCH_U=u_branch,
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PACKAGING_BRANCH_S=s_branch,
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NAME=data["name"],
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DEFAULT_BRANCH=default_branch)
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elif job_type == "release-mgmt":
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package_config = template.render()
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else:
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raise ValueError("Invalid job type")
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return package_config
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def create_jenkins_jobs(self):
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"""Interface with Jenkins to create the jobs required
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This uses the Jenkins API to do the following tasks:
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1. Assess which jobs are currently defined and if the jobs defined
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in the metadata overlap with those, do an update of the job config
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to match the current template.
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2. If there are new jobs defined, create them. If there are jobs no
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longer defined, remove them.
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3. Update the per-release views to ensure the jobs are in the correct
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views. If there are any releases no longer defined, remove them.
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"""
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# Authenticate to the Jenkins server
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server = self.auth_jenkins_server()
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# Iterate through the packages we have in our metadata and update the
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# job config for each if they match. If there's no existing job found,
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# just create it
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metadata = self.parse_metadata()
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jobs = []
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for job_name in server.get_jobs():
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jobs.append(job_name)
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total_rel = set()
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for package in metadata:
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# Create the merger jobs first
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job_name = "merger_" + package["name"]
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package_config = self.load_config("merger", package)
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# TODO: This is duplicate code, and it should be consolidated
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if job_name in jobs:
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job = server.get_job(job_name)
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job.update_config(package_config)
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else:
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job = server.create_job(job_name, str(package_config))
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if "merger" in server.views:
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view = server.views["merger"]
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else:
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view = server.views.create("merger")
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view.add_job(job_name)
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for release in package["releases"]:
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# Add the release to the total release set, which is used to
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# generate the management jobs
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total_rel.add(release)
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# Load the config given the current data
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package["release"] = release
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for jobtype in ["unstable", "stable"]:
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job_name = release + "_" + jobtype + "_" + package["name"]
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package_config = self.load_config("package-" + jobtype,
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package)
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if job_name in jobs:
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job = server.get_job(job_name)
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job.update_config(package_config)
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else:
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job = server.create_job(job_name, str(package_config))
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viewname = release + " " + jobtype
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if viewname in server.views:
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view = server.views[viewname]
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else:
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view = server.views.create(viewname)
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view.add_job(job_name)
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# From here on out, the same template is used
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package_config = self.load_config("release-mgmt")
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# Generate a management job for every release, stable and unstable
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for release in total_rel:
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for jobtype in ["unstable", "stable"]:
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job_name = "mgmt_build_" + release + "_" + jobtype
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if job_name in jobs:
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job = server.get_job(job_name)
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job.update_config(package_config)
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else:
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job = server.create_job(job_name, str(package_config))
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# The mgmt view should be the first view created, we don't
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# have to create it if it doesn't exist because that's a
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# Huge Problem anyway
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view = server.views["mgmt"]
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view.add_job(job_name)
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# Generate one last merger management job
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if "merger" in jobs:
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job = server.get_job("merger")
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job.update_config(package_config)
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else:
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job = server.create_job("merger", str(package_config))
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view = server.views["mgmt"]
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view.add_job("merger")
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if __name__ == "__main__":
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generator = Generator()
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print(generator.create_jenkins_jobs())
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