apt.rpki.net/rpki-pbuilder.py

#!/usr/bin/python
#
# $Id$
#
# Copyright (C) 2014  Dragon Research Labs ("DRL")
# Portions copyright (C) 2013  Internet Systems Consortium ("ISC")
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notices and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND DRL AND ISC DISCLAIM ALL
# WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL DRL OR
# ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
# DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
# OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
# TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.

"""
Debian/Ubuntu package build tool, based on pbuilder-dist and reprepro.
"""

import os
import sys
import time
import fcntl
import errno
import socket
import logging
import argparse
import subprocess

from textwrap import dedent

rpki_packages = ("rpki-rp", "rpki-ca")
rpki_source_package = "rpki"

parser = argparse.ArgumentParser(description = __doc__,
                                 formatter_class = argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument("--debug", action = "store_true",
                    help = "enable debugging code")
parser.add_argument("--update-build-after", type = int, default = 7 * 24 * 60 * 60,
                    help = "interval (in seconds) after which we should update the pbuilder environment")
parser.add_argument("--lockfile", default = os.path.expanduser("~/builder.lock"),
                    help = "avoid collisions between multiple instances of this script")
parser.add_argument("--keyring",  default = os.path.expanduser("~/.gnupg/pubring.gpg"),
                    help = "PGP keyring")
parser.add_argument("--git-tree", default = os.path.expanduser("~/source/master/"),
                    help = "git tree")
parser.add_argument("--apt-tree", default = os.path.expanduser("~/repository/"),
                    help = "reprepro repository")
parser.add_argument("--url-host", default = "download.rpki.net",
                    help = "hostname of public web server")
parser.add_argument("--url-scheme", default = "http",
                    help = "URL scheme of public web server")
parser.add_argument("--url-path", default = "/APT",
                    help = "path of apt repository on public web server")
parser.add_argument("--backports", nargs = "+", default = ["python-django", "python-tornado"],
                    help = "backports needed for this build")
parser.add_argument("--releases", nargs = "+", default = ["debian/jessie", "ubuntu/xenial"],
                    help = "releases for which to build")
args = parser.parse_args()

# Maybe logging should be configurable too.  Later.

logging.basicConfig(level = logging.INFO, timefmt = "%Y-%m-%dT%H:%M:%S",
                    format = "%(asctime)s [%(process)d] %(levelname)s %(message)s")

upload = socket.getfqdn() == "build-u.rpki.net"

def run(*cmd, **kwargs):
    if args.debug:
        #logging.info("Running %r %r", cmd, kwargs)
        logging.info("Running %s", " ".join(cmd))
    subprocess.check_call(cmd, **kwargs)

# Getting this to work right also required adding:
#
#   DEBBUILDOPTS="-b"
#
# to /etc/pbuilderrc; without this, reprepro (eventually, a year after
# we set this up) started failing to incorporate some of the built
# packages, because the regenerated source packages had different
# checksums than the ones loaded initially.  See:
#
# http://stackoverflow.com/questions/21563872/reprepro-complains-about-the-generated-pbuilder-debian-tar-gz-archive-md5
#
# Putting stuff in ~/.pbuilderrc didn't work with pbuilder-dist when I
# tried it last year, this may just be that sudo isn't configured to
# pass HOME through, thus pbuilder is looking for ~root/.pbuilderrc.
# Worth trying again at some point but not all that critical.

logging.info("Starting")

try:
    lock = os.open(args.lockfile, os.O_RDONLY | os.O_CREAT | os.O_NONBLOCK, 0666)
    fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
except (IOError, OSError), e:
    sys.exit(0 if e.errno == errno.EAGAIN else "Error {!r} opening lock {!r}".format(e, args.lockfile))

run("git", "fetch", "--all", "--prune", cwd = args.git_tree)
run("git", "pull",                      cwd = args.git_tree)

source_version = subprocess.check_output((sys.executable, os.path.join(args.git_tree, "buildtools/make-version.py"),
                                          "--build-tag", "--stdout"), cwd = args.git_tree).strip()

assert source_version.startswith("buildbot-")

source_version = source_version[len("buildbot-"):].replace("-", ".")

logging.info("Source version is %s", source_version)

if not args.debug:
    try:
        run("git", "diff-index", "--quiet", "HEAD", cwd = args.git_tree)
    except subprocess.CalledProcessError:
        sys.exit("Sources don't look pristine, not building ({!r})".format(source_version))

search_version = "_" + source_version + "~"

dsc_dir = os.path.abspath(os.path.join(args.git_tree, ".."))

if not os.path.isdir(args.apt_tree):
    logging.info("Creating %s", args.apt_tree)
    os.makedirs(args.apt_tree)

fn = os.path.join(args.apt_tree, "apt-gpg-key.asc")
if not os.path.exists(fn):
    logging.info("Creating %s", fn)
    run("gpg", "--export", "--armor", "--keyring", args.keyring, stdout = open(fn, "w"))

class Release(object):

    architectures = dict(amd64 = "", i386 = "-i386")

    releases = []
    packages = {}

    def __init__(self, distribution_release, backports):
        self.distribution, self.release = distribution_release.split("/")
        self.backports = backports
        self.apt_source = "{scheme}://{host}/{path}/{distribution} {release} main".format(
            scheme = args.url_scheme,
            host = args.url_host,
            path = args.url_path.strip("/"),
            distribution = self.distribution,
            release = self.release)
        self.env = dict(os.environ)
        if backports:
            self.env.update(OTHERMIRROR = "deb " + self.apt_source)
        self.releases.append(self)

    @classmethod
    def do_all_releases(cls):
        for release in cls.releases:
            release.setup_reprepro()
        for release in cls.releases:
            release.list_repository()
        for release in cls.releases:
            for release.arch, release.tag in cls.architectures.iteritems():
                release.do_one_architecture()
            del release.arch, release.tag

    @staticmethod
    def repokey(release, architecture, package):
        return (release, architecture, package)

    def list_repository(self):
        cmd = ("reprepro", "list", self.release)
        logging.info("Running %s", " ".join(cmd))
        listing = subprocess.check_output(cmd, cwd = self.tree)
        for line in listing.replace(":", " ").replace("|", " ").splitlines():
            rel, comp, arch, pkg, ver = line.split()
            key = (rel, arch, pkg)
            assert key not in self.packages
            self.packages[key] = ver

    @property
    def deb_in_repository(self):
        ret = all(self.packages.get((self.release, self.arch, package)) == self.version
                  for package in rpki_packages)
        #logging.info("Got %s looking for %r in %r", ret, self.version, self.packages)
        return ret

    @property
    def src_in_repository(self):
        ret = self.packages.get((self.release, "source", rpki_source_package)) == self.version
        #logging.info("Got %s looking for %r in %r", ret, self.version, self.packages)
        return ret

    @property
    def version(self):
        return source_version + "~" + self.release

    @property
    def dsc(self):
        return os.path.join(dsc_dir, "rpki_{}.dsc".format(self.version))

    @property
    def tree(self):
        return os.path.join(args.apt_tree, self.distribution, "")

    @property
    def basefile(self):
        return os.path.expanduser("~/pbuilder/{0.release}{0.tag}-base.tgz".format(self))

    @property
    def result(self):
        return os.path.expanduser("~/pbuilder/{0.release}{0.tag}_result".format(self))

    @property
    def changes(self):
        return os.path.join(self.result, "rpki_{0.version}_{0.arch}.changes".format(self))

    def do_one_architecture(self):
        logging.info("Running build for %s %s %s", self.distribution, self.release, self.arch)

        if not os.path.exists(self.dsc):

            logging.info("%s does not exist", self.dsc)
            for fn in os.listdir(dsc_dir):
                fn = os.path.join(dsc_dir, fn)
                if not os.path.isdir(fn) and search_version not in fn:
                    logging.info("Removing %s", fn)
                    os.unlink(fn)
            run("rm", "-rf", "debian", cwd = args.git_tree)

            logging.info("Building source package %s", self.version)
            run(sys.executable, "buildtools/build-debian-packages.py", "--version-suffix", self.release, cwd = args.git_tree)
            run("dpkg-buildpackage", "-S", "-us", "-uc", "-rfakeroot", cwd = args.git_tree)

        if not os.path.exists(self.basefile):
            logging.info("Creating build environment %s %s", self.release, self.arch)
            run("pbuilder-dist", self.release, self.arch, "create", env = self.env)

        elif time.time() > os.stat(self.basefile).st_mtime + args.update_build_after:
            logging.info("Updating build environment %s %s", self.release, self.arch)
            run("pbuilder-dist", self.release, self.arch, "update", env = self.env)

        if not self.deb_in_repository:

            for fn in os.listdir(self.result):
                fn = os.path.join(self.result, fn)
                logging.info("Removing %s", fn)
                os.unlink(fn)

            logging.info("Building binary packages %s %s %s", self.release, self.arch, self.version)
            run("pbuilder-dist", self.release, self.arch, "build", "--keyring", args.keyring, self.dsc, env = self.env)

            logging.info("Updating repository for %s %s %s", self.release, self.arch, self.version)
            run("reprepro", "--ignore=wrongdistribution", "include", self.release, self.changes, cwd = self.tree)

        if not self.src_in_repository:
            logging.info("Updating repository for %s source %s", self.release, self.version)
            run("reprepro", "--ignore=wrongdistribution", "includedsc", self.release, self.dsc, cwd = self.tree)

    def setup_reprepro(self):

        logging.info("Configuring reprepro for %s/%s", self.distribution, self.release)

        dn = os.path.join(self.tree, "conf")
        if not os.path.isdir(dn):
            logging.info("Creating %s", dn)
            os.makedirs(dn)

        fn = os.path.join(self.tree, "conf", "distributions")
        distributions = open(fn, "r").read() if os.path.exists(fn) else ""
        if "Codename: {0.release}\n".format(self) not in distributions:
            logging.info("%s %s", "Editing" if distributions else "Creating", fn)
            with open(fn, "w") as f:
                if distributions:
                    f.write(distributions)
                    f.write("\n")
                f.write(dedent("""\
                               Origin: rpki.net
                               Label: rpki.net {self.distribution} repository
                               Codename: {self.release}
                               Architectures: {architectures} source
                               Components: main
                               Description: rpki.net {Distribution} APT Repository
                               SignWith: yes
                               DebOverride: override.{self.release}
                               DscOverride: override.{self.release}
                               """.format(
                            self = self,
                            Distribution  = self.distribution.capitalize(),
                            architectures = " ".join(self.architectures))))

        fn = os.path.join(self.tree, "conf", "options")
        if not os.path.exists(fn):
            logging.info("Creating %s", fn)
            with open(fn, "w") as f:
                f.write(dedent("""\
                               verbose
                               ask-passphrase
                               basedir .
                               """))

        fn = os.path.join(self.tree, "conf", "override." + self.release)
        if not os.path.exists(fn):
            logging.info("Creating %s", fn)
            with open(fn, "w") as f:
                for pkg in self.backports:
                    f.write(dedent("""\
                                   {pkg:<30}   Priority        optional
                                   {pkg:<30}   Section         python
                                   """.format(pkg = pkg)))
                f.write(dedent("""\
                               rpki-ca                 Priority        extra
                               rpki-ca                 Section         net
                               rpki-rp                 Priority        extra
                               rpki-rp                 Section         net
                               """))

        fn = os.path.join(args.apt_tree, "rpki.{}.list".format(self.release))
        if not os.path.exists(fn):
            logging.info("Creating %s", fn)
            with open(fn, "w") as f:
                f.write(dedent("""\
                               deb {self.apt_source}
                               deb-src {self.apt_source}
                               """.format(self = self)))

# Load whatever releases the user specified

for r in args.releases:
    Release(r, args.backports)

# Do all the real work.

Release.do_all_releases()

# Push any tags created above to the public git repository.

if upload:
    run("git", "push", "--tags", cwd = args.git_tree)

# Upload results, maybe.  We do this in two stages, to minimize the window
# during which the uploaded repository might be in an inconsistent state.

def rsync(*flags):
    cmd = ["rsync", "--archive", "--itemize-changes", "--rsh", "ssh"]
    cmd.extend(flags)
    cmd.append(args.apt_tree)
    cmd.append("rsync://{host}/{path}/".format(host = args.url_host,
                                               path = args.url_path.strip("/")))
    if upload:
        logging.info("Synching repository to %s with flags %s",
                     cmd[-1], " ".join(flags))
        run(*cmd)
    else:
        logging.info("Would have synched repository to %s with flags %s",
                     cmd[-1], " ".join(flags))

rsync("--ignore-existing")

rsync("--exclude", "HEADER.html",
      "--exclude", "HEADER.css",
      "--delete", "--delete-delay")

logging.info("Done")