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#!/usr/bin/env python3
# Build the Debian packages using Docker images.
#
# This script builds the Docker images and then executes them sequentially, each
# one building a Debian package for the targeted operating system. It is
# designed to be a "single command" to produce all the images.
#
# By default, builds for all known distributions, but a list of distributions
# can be passed on the commandline for debugging.
import argparse
from concurrent.futures import ThreadPoolExecutor
import os
import signal
import subprocess
import sys
import threading
DISTS = (
"debian:stretch",
"debian:buster",
"debian:sid",
"ubuntu:xenial",
"ubuntu:bionic",
"ubuntu:cosmic",
)
DESC = '''\
Builds .debs for synapse, using a Docker image for the build environment.
By default, builds for all known distributions, but a list of distributions
can be passed on the commandline for debugging.
'''
class Builder(object):
def __init__(self, redirect_stdout=False):
self.redirect_stdout = redirect_stdout
self.active_containers = set()
self._lock = threading.Lock()
self._failed = False
def run_build(self, dist):
"""Build deb for a single distribution"""
if self._failed:
print("not building %s due to earlier failure" % (dist, ))
raise Exception("failed")
try:
self._inner_build(dist)
except Exception as e:
print("build of %s failed: %s" % (dist, e), file=sys.stderr)
self._failed = True
raise
def _inner_build(self, dist):
projdir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
os.chdir(projdir)
tag = dist.split(":", 1)[1]
# Make the dir where the debs will live.
#
# Note that we deliberately put this outside the source tree, otherwise
# we tend to get source packages which are full of debs. (We could hack
# around that with more magic in the build_debian.sh script, but that
# doesn't solve the problem for natively-run dpkg-buildpakage).
debsdir = os.path.join(projdir, '../debs')
os.makedirs(debsdir, exist_ok=True)
if self.redirect_stdout:
logfile = os.path.join(debsdir, "%s.buildlog" % (tag, ))
print("building %s: directing output to %s" % (dist, logfile))
stdout = open(logfile, "w")
else:
stdout = None
# first build a docker image for the build environment
subprocess.check_call([
"docker", "build",
"--tag", "dh-venv-builder:" + tag,
"--build-arg", "distro=" + dist,
"-f", "docker/Dockerfile-dhvirtualenv",
"docker",
], stdout=stdout, stderr=subprocess.STDOUT)
container_name = "synapse_build_" + tag
with self._lock:
self.active_containers.add(container_name)
# then run the build itself
subprocess.check_call([
"docker", "run",
"--rm",
"--name", container_name,
"--volume=" + projdir + ":/synapse/source:ro",
"--volume=" + debsdir + ":/debs",
"-e", "TARGET_USERID=%i" % (os.getuid(), ),
"-e", "TARGET_GROUPID=%i" % (os.getgid(), ),
"dh-venv-builder:" + tag,
], stdout=stdout, stderr=subprocess.STDOUT)
with self._lock:
self.active_containers.remove(container_name)
if stdout is not None:
stdout.close()
print("Completed build of %s" % (dist, ))
def kill_containers(self):
with self._lock:
active = list(self.active_containers)
for c in active:
print("killing container %s" % (c,))
subprocess.run([
"docker", "kill", c,
], stdout=subprocess.DEVNULL)
with self._lock:
self.active_containers.remove(c)
def run_builds(dists, jobs=1):
builder = Builder(redirect_stdout=(jobs > 1))
def sig(signum, _frame):
print("Caught SIGINT")
builder.kill_containers()
signal.signal(signal.SIGINT, sig)
with ThreadPoolExecutor(max_workers=jobs) as e:
res = e.map(builder.run_build, dists)
# make sure we consume the iterable so that exceptions are raised.
for r in res:
pass
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description=DESC,
)
parser.add_argument(
'-j', '--jobs', type=int, default=1,
help='specify the number of builds to run in parallel',
)
parser.add_argument(
'dist', nargs='*', default=DISTS,
help='a list of distributions to build for. Default: %(default)s',
)
args = parser.parse_args()
run_builds(dists=args.dist, jobs=args.jobs)
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