mirror of
https://github.com/element-hq/synapse
synced 2024-06-30 18:23:28 +00:00
3bdb9b07fd
Make it more obvious which Python version runs on a given Linux distribution so when we end up dropping support for a given Python version, we can more easily find the reference to the Python version and remove any references for the distribution. We don't want to be running tests or building packages on a distribution that no longer has a supported Python version. This way, we can avoid another situation like when we dropped support for Python 3.7 but forgot to drop the Debian Buster references everywhere (https://github.com/matrix-org/synapse/pull/15893)
230 lines
7.3 KiB
Python
Executable file
230 lines
7.3 KiB
Python
Executable file
#!/usr/bin/env python3
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# Build the Debian packages using Docker images.
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#
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# This script builds the Docker images and then executes them sequentially, each
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# one building a Debian package for the targeted operating system. It is
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# designed to be a "single command" to produce all the images.
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#
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# By default, builds for all known distributions, but a list of distributions
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# can be passed on the commandline for debugging.
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import argparse
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import json
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import os
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import signal
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import subprocess
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import sys
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import threading
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from concurrent.futures import ThreadPoolExecutor
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from types import FrameType
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from typing import Collection, Optional, Sequence, Set
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# These are expanded inside the dockerfile to be a fully qualified image name.
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# e.g. docker.io/library/debian:bullseye
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#
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# If an EOL is forced by a Python version and we're dropping support for it, make sure
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# to remove references to the distibution across Synapse (search for "bullseye" for
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# example)
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DISTS = (
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"debian:bullseye", # (EOL ~2024-07) (our EOL forced by Python 3.9 is 2025-10-05)
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"debian:bookworm", # (EOL not specified yet) (our EOL forced by Python 3.11 is 2027-10-24)
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"debian:sid", # (EOL not specified yet) (our EOL forced by Python 3.11 is 2027-10-24)
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"ubuntu:focal", # 20.04 LTS (EOL 2025-04) (our EOL forced by Python 3.8 is 2024-10-14)
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"ubuntu:jammy", # 22.04 LTS (EOL 2027-04) (our EOL forced by Python 3.10 is 2026-10-04)
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"ubuntu:kinetic", # 22.10 (EOL 2023-07-20) (our EOL forced by Python 3.10 is 2026-10-04)
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"ubuntu:lunar", # 23.04 (EOL 2024-01) (our EOL forced by Python 3.11 is 2027-10-24)
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)
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DESC = """\
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Builds .debs for synapse, using a Docker image for the build environment.
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By default, builds for all known distributions, but a list of distributions
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can be passed on the commandline for debugging.
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"""
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projdir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
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class Builder(object):
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def __init__(
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self,
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redirect_stdout: bool = False,
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docker_build_args: Optional[Sequence[str]] = None,
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):
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self.redirect_stdout = redirect_stdout
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self._docker_build_args = tuple(docker_build_args or ())
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self.active_containers: Set[str] = set()
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self._lock = threading.Lock()
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self._failed = False
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def run_build(self, dist: str, skip_tests: bool = False) -> None:
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"""Build deb for a single distribution"""
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if self._failed:
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print("not building %s due to earlier failure" % (dist,))
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raise Exception("failed")
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try:
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self._inner_build(dist, skip_tests)
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except Exception as e:
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print("build of %s failed: %s" % (dist, e), file=sys.stderr)
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self._failed = True
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raise
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def _inner_build(self, dist: str, skip_tests: bool = False) -> None:
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tag = dist.split(":", 1)[1]
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# Make the dir where the debs will live.
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#
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# Note that we deliberately put this outside the source tree, otherwise
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# we tend to get source packages which are full of debs. (We could hack
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# around that with more magic in the build_debian.sh script, but that
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# doesn't solve the problem for natively-run dpkg-buildpakage).
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debsdir = os.path.join(projdir, "../debs")
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os.makedirs(debsdir, exist_ok=True)
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if self.redirect_stdout:
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logfile = os.path.join(debsdir, "%s.buildlog" % (tag,))
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print("building %s: directing output to %s" % (dist, logfile))
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stdout = open(logfile, "w")
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else:
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stdout = None
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# first build a docker image for the build environment
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build_args = (
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(
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"docker",
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"build",
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"--tag",
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"dh-venv-builder:" + tag,
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"--build-arg",
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"distro=" + dist,
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"-f",
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"docker/Dockerfile-dhvirtualenv",
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)
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+ self._docker_build_args
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+ ("docker",)
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)
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subprocess.check_call(
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build_args,
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stdout=stdout,
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stderr=subprocess.STDOUT,
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cwd=projdir,
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)
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container_name = "synapse_build_" + tag
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with self._lock:
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self.active_containers.add(container_name)
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# then run the build itself
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subprocess.check_call(
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[
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"docker",
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"run",
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"--rm",
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"--name",
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container_name,
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"--volume=" + projdir + ":/synapse/source:ro",
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"--volume=" + debsdir + ":/debs",
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"-e",
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"TARGET_USERID=%i" % (os.getuid(),),
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"-e",
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"TARGET_GROUPID=%i" % (os.getgid(),),
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"-e",
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"DEB_BUILD_OPTIONS=%s" % ("nocheck" if skip_tests else ""),
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"dh-venv-builder:" + tag,
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],
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stdout=stdout,
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stderr=subprocess.STDOUT,
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)
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with self._lock:
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self.active_containers.remove(container_name)
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if stdout is not None:
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stdout.close()
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print("Completed build of %s" % (dist,))
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def kill_containers(self) -> None:
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with self._lock:
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active = list(self.active_containers)
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for c in active:
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print("killing container %s" % (c,))
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subprocess.run(
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[
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"docker",
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"kill",
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c,
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],
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stdout=subprocess.DEVNULL,
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)
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with self._lock:
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self.active_containers.remove(c)
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def run_builds(
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builder: Builder, dists: Collection[str], jobs: int = 1, skip_tests: bool = False
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) -> None:
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def sig(signum: int, _frame: Optional[FrameType]) -> None:
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print("Caught SIGINT")
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builder.kill_containers()
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signal.signal(signal.SIGINT, sig)
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with ThreadPoolExecutor(max_workers=jobs) as e:
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res = e.map(lambda dist: builder.run_build(dist, skip_tests), dists)
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# make sure we consume the iterable so that exceptions are raised.
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for _ in res:
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pass
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(
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description=DESC,
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)
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parser.add_argument(
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"-j",
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"--jobs",
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type=int,
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default=1,
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help="specify the number of builds to run in parallel",
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)
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parser.add_argument(
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"--no-check",
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action="store_true",
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help="skip running tests after building",
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)
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parser.add_argument(
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"--docker-build-arg",
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action="append",
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help="specify an argument to pass to docker build",
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)
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parser.add_argument(
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"--show-dists-json",
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action="store_true",
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help="instead of building the packages, just list the dists to build for, as a json array",
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)
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parser.add_argument(
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"dist",
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nargs="*",
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default=DISTS,
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help="a list of distributions to build for. Default: %(default)s",
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)
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args = parser.parse_args()
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if args.show_dists_json:
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print(json.dumps(DISTS))
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else:
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builder = Builder(
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redirect_stdout=(args.jobs > 1), docker_build_args=args.docker_build_arg
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)
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run_builds(
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builder,
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dists=args.dist,
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jobs=args.jobs,
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skip_tests=args.no_check,
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)
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