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#!/usr/bin/python3
# SPDX-License-Identifier: MIT
"""mdbp backend using pbuilder"""
import argparse
import contextlib
import os
import pathlib
import shlex
import subprocess
import sys
import tempfile
import typing
from .common import AddSpaceSeparatedValues, build_subdir, buildjson, \
clean_dir, compute_env, get_dsc, hook_commands, make_option, \
parse_dsc, profile_option, temporary_static_file
def find_basetgz(distribution: str,
basedir: str = "/var/cache/pbuiler") -> typing.Optional[str]:
"""Locate a pbuilder base.tgz for the given distribution."""
if distribution in ("sid", "unstable"):
return None
for pat in ("/%s-base.tgz", "/%s.tgz"):
basetgz = basedir + pat % distribution
if pathlib.Path(basetgz).is_file():
return basetgz
raise ValueError("unsupported distribution %s" % distribution)
def sourcetree_location(dscpath: pathlib.Path) -> str:
"""Compute a shell expression that represents the source tree location
inside pbuilder.
"""
dsc = parse_dsc(dscpath)
subdir = build_subdir(dsc["Source"], dsc["Version"])
return '"$BUILDDIR"/' + shlex.quote(subdir)
@contextlib.contextmanager
def hookdir() -> typing.Iterator[
typing.Tuple[pathlib.Path, typing.Callable[[str, str], None]]
]:
"""A context manager that returns a pair of a hook directory suitable for
pbuilder and a function for adding hooks to the directory.
"""
with tempfile.TemporaryDirectory() as tdir:
directory = pathlib.Path(tdir)
counter = 0
def addhook(key: str, content: str, prio: str = "50") -> None:
nonlocal counter
hookpath = directory / ("%s%s%05X" % (key, prio, counter))
hookpath.write_text(content)
hookpath.chmod(0o755)
yield (directory, addhook)
def main() -> None:
"""Entry point for mdbp-pbuilder backend"""
parser = argparse.ArgumentParser()
parser.add_argument(
"--pbuilderopt",
dest="pbuilderopts",
action="append",
metavar="OPT",
default=[],
help="a custom option to be passed down to pbuilder, can be specified "
"multiple times and mixed with --pbuilderopts",
)
parser.add_argument(
"--pbuilderopts",
action=AddSpaceSeparatedValues,
metavar="OPTS",
default=[],
help="space-separated options to be passed down to pbuilder, can be "
"specified multiple times and mixed with --pbuilderopt",
)
parser.add_argument("buildjson", type=buildjson)
args = parser.parse_args()
build = args.buildjson
if "sourcename" in build["input"]:
raise ValueError("building a source package by name is not supported")
enablelog = build["output"].get("log", True)
if "bd-uninstallable-explainer" in build:
raise ValueError("bd-uninstallable-explainer %r not supported" %
build["bd-uinstallable-explainer"])
cmd = [
*([] if os.getuid() == 0 else ["sudo", "-E", "--"]),
"/usr/sbin/pbuilder",
"build",
"--no-source-only-changes",
*make_option("--basetgz", find_basetgz(build["distribution"])),
*make_option("--architecture", build.get("build_architecture")),
*make_option("--host-arch", build.get("host_architecture")),
*make_option("--othermirror",
"|".join(build.get("extrarepositories", ()))),
*make_option("--use-network",
{"enable": "yes", "try-enable": "yes", "disable": "no",
"try-disable": "no"}.get(build.get("network"))),
*dict(any=["--binary-arch"],
all=["--binary-indep"],
binary=["--debbuildopts", "-b"])[
build.get("type", "binary")],
*profile_option(build, "--profiles"),
"--buildresult", build["output"]["directory"],
*([] if enablelog else ["--loglevel", "E"]),
]
apt_get = ["apt-get", "-oAPT::Keep-Downloaded-Path=false", "--yes"]
with contextlib.ExitStack() as stack:
if build.get("build_path"):
pbuilderrc = "BUILDDIR=%s\n" % shlex.quote(build["build_path"])
cmd.extend([
"--configfile",
str(stack.enter_context(temporary_static_file(pbuilderrc))),
])
hookdirname, addhook = stack.enter_context(hookdir())
addhook(
"D",
"""#/bin/sh
set -e
apt-get --error-on=any update
%s dist-upgrade
"""
% shlex.join(apt_get),
)
if build.get("lintian", {}).get("run", False):
addhook(
"B",
"""#!/bin/sh
set -e
%s install lintian
runuser -u pbuilder -- lintian %s "${BUILDDIR:-/tmp/buildd}"/*.changes
"""
% (
shlex.join(apt_get),
shlex.join(build["lintian"].get("options", [])),
),
)
dscpath = stack.enter_context(get_dsc(build))
sourcetree = sourcetree_location(dscpath)
for hook in build.get("hooks", ()):
addhook({
"prebuild": "A",
"postbuildsuccess": "B",
"postbuildfailure": "C",
}[hook["type"]],
"#!/bin/sh\n%s\n" %
" || return $?\n".join(
hook_commands(hook, sourcetree)))
cmd.extend(["--hookdir", str(hookdirname), *args.pbuilderopts,
str(dscpath)])
ret = subprocess.call(cmd, env=compute_env(build),
stdout=None if enablelog
else subprocess.DEVNULL,
stderr=subprocess.STDOUT if enablelog
else subprocess.DEVNULL)
clean_dir(pathlib.Path(build["output"]["directory"]),
build["output"].get("artifacts", ["*"]))
sys.exit(ret)
if __name__ == "__main__":
main()
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