diff --git a/scripts-dev/build_debian_packages b/scripts-dev/build_debian_packages
new file mode 100755
index 0000000000..6b9be99060
--- /dev/null
+++ b/scripts-dev/build_debian_packages
@@ -0,0 +1,154 @@
+#!/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
+import os
+import signal
+import subprocess
+import sys
+import threading
+from concurrent.futures import ThreadPoolExecutor
+
+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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