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#!/usr/bin/python3
# SPDX-License-Identifier: MIT
"""mdbp backend using sbuild"""
import argparse
import contextlib
import pathlib
import subprocess
import sys
import typing
from .common import AddSpaceSeparatedValues, buildjson, clean_dir, \
compute_env, get_dsc, temporary_static_file
PerlValue = typing.Union[None, str, typing.List[typing.Any],
typing.Dict[str, typing.Any]]
perl_escape_map = {
ord("\\"): r"\\", ord('"'): r'\"', ord("@"): r"\@", ord("$"): r"\$",
ord("\n"): r"\n", ord("\r"): r"\r",
}
def perl_repr(value: PerlValue) -> str:
"""Encode a Python value as a string parseable to Perl."""
if value is None:
return "undef"
if isinstance(value, bool):
return str(int(value))
if isinstance(value, str):
return '"%s"' % value.translate(perl_escape_map)
if isinstance(value, list):
return "[%s]" % ",".join(map(perl_repr, value))
if isinstance(value, dict):
return "{%s}" % ",".join("%s => %s" % (perl_repr(key),
perl_repr(value))
for key, value in value.items())
raise TypeError("unexpected value type %r" % type(value))
def perl_conf(conf: typing.Dict[str, PerlValue]) -> str:
"""Turn a mapping into a Perl source assigning variables."""
return "".join("$%s=%s;\n" % (key, perl_repr(value))
for key, value in conf.items()) + "1;\n"
def add_external_command(
conf: typing.Dict[str, PerlValue], stage: str, command: str
) -> None:
"""Modify the given conf object to add the given command on the given
external_commands stage.
"""
extcomm = conf.setdefault("external_commands", {})
assert isinstance(extcomm, dict)
comms = extcomm.setdefault(stage, [])
assert isinstance(comms, list)
comms.append(command)
def main() -> None:
"""Entry point for mdbp-sbuild backend"""
parser = argparse.ArgumentParser()
parser.add_argument(
"--sbuildopt",
dest="sbuildopts",
action="append",
metavar="OPT",
default=[],
help="a custom option to be passed down to sbuild, can be specified "
"multiple times and mixed with --sbuildopts",
)
parser.add_argument(
"--sbuildopts",
action=AddSpaceSeparatedValues,
metavar="OPTS",
default=[],
help="space-separated options to be passed down to sbuild, can be "
"specified multiple times and mixed with --sbuildopt",
)
parser.add_argument("buildjson", type=buildjson)
args = parser.parse_args()
build = args.buildjson
if build.get("network") == "disable":
raise ValueError("disabling network not supported with sbuild")
sbc = dict(
nolog=True,
apt_update=True,
apt_distupgrade=True,
distribution=build["distribution"],
build_arch_all=build.get("type") != "any",
build_arch_any=build.get("type") != "all",
bd_uninstallable_explainer=build.get("bd-uninstallable-explainer", ""),
run_lintian=bool(build.get("lintian", {}).get("run")),
extra_repositories=build.get("extra_repositories", []),
build_environment=compute_env(build),
)
with contextlib.suppress(KeyError):
sbc["lintian_opts"] = build["lintian"]["options"]
with contextlib.suppress(KeyError):
sbc["build_arch"] = build["build_architecture"]
with contextlib.suppress(KeyError):
sbc["host_arch"] = build["host_architecture"]
with contextlib.suppress(KeyError):
sbc["build_profiles"] = " ".join(build["build_profiles"])
with contextlib.suppress(KeyError):
sbc["build_path"] = build["build_path"]
if build.get("network") == "try-disable":
add_external_command(
sbc,
"starting-build-commands",
"mv /etc/resolv.conf /etc/resolv.conf.disabled",
)
add_external_command(
sbc,
"finished-build-commands",
"mv /etc/resolv.conf.disabled /etc/resolv.conf",
)
with contextlib.ExitStack() as stack:
sbuildconf = stack.enter_context(temporary_static_file(perl_conf(sbc)))
try:
thing = build["input"]["sourcename"]
with contextlib.suppress(KeyError):
thing += "_" + build["input"]["version"]
except KeyError:
thing = str(stack.enter_context(get_dsc(build)).absolute())
ret = subprocess.call(["sbuild", *args.sbuildopts, thing],
env=dict(SBUILD_CONFIG=str(sbuildconf),
PATH="/usr/bin:/bin"),
cwd=build["output"]["directory"],
stdout=None if build["output"].get("log", True)
else subprocess.DEVNULL,
stderr=subprocess.STDOUT
if build["output"].get("log", True)
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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