~ubuntu-on-ec2/vmbuilder/automated-ec2-builds-fginther

#!/usr/bin/env python

import argparse

import os.path

import sys

import time

from collections import defaultdict

from multiprocessing import Process

from urllib import ContentTooShortError, urlretrieve

from launchpadlib.launchpad import Launchpad

from launchpadlib.credentials import UnencryptedFileCredentialStore

from lazr.restfulclient.errors import NotFound

LIVEFS_OWNER = '~cloud-images-release-managers'

def mangle_ppa_shortcut(shortcut):

    ppa_shortcut = shortcut.split(":")[1]

    user = ppa_shortcut.split("/")[0]

    if (user[0] == "~"):

        user = user[1:]

    ppa_path_objs = ppa_shortcut.split("/")[1:]

    ppa_path = []

    if (len(ppa_path_objs) < 1):

        ppa_path = ['ubuntu', 'ppa']

    elif (len(ppa_path_objs) == 1):

        ppa_path.insert(0, "ubuntu")

        ppa_path.extend(ppa_path_objs)

    else:

        ppa_path = ppa_path_objs

    ppa = "~%s/%s" % (user, "/".join(ppa_path))

    return ppa

def _get_livefs(lp, livefs_name, suite, image_format, project):

    kwargs = {

        'distro_series': '/ubuntu/{}'.format(suite),

        'name': livefs_name,

        'owner': '/{}'.format(LIVEFS_OWNER),

    }

    try:

        return lp.livefses.getByName(**kwargs)

    except NotFound:

        kwargs['metadata'] = {}

        return lp.livefses.new(**kwargs)

def trigger_build(lp, livefs_name, suite, arch, image_format, project,

                  archive=None, proposed=False):

    if archive is None:

        reference = 'ubuntu'

    elif archive.startswith('ppa:'):

        reference = mangle_ppa_shortcut(archive)

    else:

        raise Exception('We only support archives like ppa:person/ppa.')

    archive = lp.archives.getByReference(reference=reference)

    lfs = _get_livefs(lp, livefs_name, suite, image_format, project)

    metadata = {'image_format': image_format, 'project': project}

    build = lfs.requestBuild(

        pocket='Updates' if not proposed else 'Proposed',

        archive=archive,

        distro_arch_series='/ubuntu/{}/{}'.format(suite, arch),

        metadata_override=metadata)

    print "Build queued; track progress at {}".format(build.web_link)

    return build

def _start_download(file_url, target_path):

    def perform_download(file_url, target_path, iteration=0):

        print('Downloading {} to {}...'.format(file_url, target_path))

        try:

            urlretrieve(file_url, target_path)

        except ContentTooShortError:

            if iteration > 4:

                raise

            perform_download(file_url, target_path, iteration=iteration+1)

    p = Process(target=perform_download, args=(file_url, target_path))

    p.start()

    return p

def download(build, target_prefix):

    mapping = {

        '.ext4': '.ext4',

        '.img': '.ext4',

        '.manifest': '.manifest',

        '.tar.gz': '-root.tar.gz',

    }

    file_urls = build.getFileUrls()

    print("{} build completed; the following files were created:\n{}".format(

        build.distro_arch_series.architecture_tag, '\n'.join(file_urls)))

    download_processes = set()

    for file_url in file_urls:

        for suffix in mapping:

            if file_url.endswith(suffix):

                target_path = '{}{}'.format(target_prefix, mapping[suffix])

                download_processes.add(_start_download(file_url, target_path))

    print("Waiting for downloads to complete.")

    for process in download_processes:

        process.join()

def fetch_build_log(build, target_dir):

    target_path = os.path.join(target_dir, 'build_log.txt.gz')

    process = _start_download(build.build_log_url, target_path)

    process.join()

def main(livefs_name, suite, arch, download_directory, image_format, project,

         archive=None, cred_location=None, proposed=False):

    if not os.path.exists(download_directory):

        raise Exception(

            'Download directory {} does not exist.'.format(download_directory))

    if cred_location is None:

        cred_location = os.path.expanduser('~/.lp_creds')

    print "Using creds in {}".format(cred_location)

    credential_store = UnencryptedFileCredentialStore(cred_location)

    lp = Launchpad.login_with('cpc', 'production', version='devel',

                              credential_store=credential_store)

    build = trigger_build(lp, livefs_name, suite, arch, image_format, project,

                          archive=archive, proposed=proposed)

    try:

        previous_buildstate = defaultdict(unicode)

        while build.buildstate != 'Successfully built':

            if build.buildstate != previous_buildstate:

                print '{} build now in "{}" state'.format(

                    arch, build.buildstate)

                previous_buildstate = build.buildstate

            if build.buildstate in ['Cancelled build', 'Failed to build']:

                fetch_build_log(build, download_directory)

                sys.exit(1)

            time.sleep(10)

            build.lp_refresh()

    finally:

        build.lp_refresh()

        if build.can_be_cancelled:

            print 'Scheduling build cancellation...'

            build.cancel()

    fetch_build_log(build, download_directory)

    target_prefix = 'ubuntu-{}-core-cloudimg-{}'.format(suite, arch)

    target_path = os.path.join(download_directory, target_prefix)

    download(build, target_path)

    print("All downloads complete; done!")

if __name__ == '__main__':

    parser = argparse.ArgumentParser(

        description="Build an Ubuntu Core tarball using Launchpad's buildds.")

    parser.add_argument('--download-directory', default='.',

                        help='The directory to download files to.')

    parser.add_argument('--livefs-name', default='docker-ubuntu-core',

                        help="The name of the livefs to build in.")

    parser.add_argument('--livefs-owner', default=LIVEFS_OWNER,

                        help='The owner of the livefs to build in.')

    parser.add_argument('--suite', required=True, help="The suite to build.")

    parser.add_argument('--arch', required=True, help="The arch to build.")

    parser.add_argument('--archive',

                        help="An (optional) archive to build the image from.")

    parser.add_argument('--image-format', default='plain',

                        help='The image format to build.')

    parser.add_argument('--project', default='ubuntu-core',

                        help='The project to build.')

    parser.add_argument('--cred-location',

                        help='The location of the LP creds.')

    parser.add_argument('--proposed', action='store_true')

    args = parser.parse_args()

    main(args.livefs_name, args.suite, args.arch, args.download_directory,

         args.image_format, args.project, archive=args.archive,

         cred_location=args.cred_location, proposed=args.proposed)