#!/bin/sh

set -exu

# dump information about the autopkgtest runner
# print to stderr to prevent wrong interleaving with set -x output
cat /etc/debian_version >&2
env >&2
nproc >&2
apt-config dump >&2
apt-cache policy >&2
for f in /etc/apt/sources.list /etc/apt/sources.list.d/* /etc/apt/preferences.d/*; do
	[ -e "$f" ] || continue
	echo "dumping contents of $f" >&2
	cat "$f" >&2
done

# The mmdebstrap autopkgtest can take a very long time and it cannot be split
# into multiple individual tests because they all rely on the existence of the
# local package cache. We cannot re-generate this cache multiple times because
# if a dinstall happens while this autopkgtest is running (not unlikely because
# this test takes 2 hours easy) then the chroots might not be bit-by-bit
# identical with each other anymore. Being independent of unfortunate Debian
# mirror updates is one of the reasons the cache exists.
#
# By default (and this cannot be changed), a autopkgtest "test" is allowed to
# last 10000 seconds or 2:46:40 hours. If this test takes too long, we return
# exit code 77, marking it as "skipped".

TIME_BEGIN=$(date +%s)

# the archive with the highest priority where the base-files package comes from
# determines whether we are on stable, testing or unstable
DEFAULT_DIST=$(cat << END | python3 -
import apt_pkg, sys
apt_pkg.init()
c = apt_pkg.Cache(None)
d = apt_pkg.DepCache(c)
s = apt_pkg.SourceList()
s.read_main_list()

highest_prio = -1
highest_archive = None
for pkgfile, _ in d.get_candidate_ver(c["base-files"]).file_list:
	print("processing: %s"%pkgfile, file=sys.stderr)
	index = s.find_index(pkgfile)
	if index is None:
		print("index is none -- skipping", file=sys.stderr)
		continue
	if not index.is_trusted:
		print("index is not trusted -- skipping", file=sys.stderr)
		continue
	archive = pkgfile.archive
	if archive not in ["stable", "testing", "unstable"]:
		print("index archive %s is %s -- skipping"%(index, archive), file=sys.stderr)
		continue
	prio = d.policy.get_priority(pkgfile)
	if prio > highest_prio:
		highest_prio = prio
		highest_archive = archive
if highest_archive is None:
	print("highest priority apt archive is neither stable, testing or unstable", file=sys.stderr)
	for f in c.file_list:
		print('========================', file=sys.stderr)
		for a in ['architecture', 'archive', 'codename', 'component', 'filename', 'id', 'index_type', 'label', 'not_automatic', 'not_source', 'origin', 'site', 'size', 'version']:
			print("%s: %s"%(a, getattr(f, a, None)), file=sys.stderr)
		print("priority: ", d.policy.get_priority(f), file=sys.stderr)
	exit(1)
print("highest archive priority: %s"%highest_archive, file=sys.stderr)
print(highest_archive)
END
)

# On stable and testing we can run tests that require m-a:same packages to
# exist in the same version across multiple architectures. Only on unstable we
# disable this because packages in unstable are often out-of-sync.
RUN_MA_SAME_TESTS=yes
case $DEFAULT_DIST in
	unstable)
		RUN_MA_SAME_TESTS=no
		;;
	stable|testing)
		# nothing to do
		;;
	*)
		echo "unknown distribution $DEFAULT_DIST, must be one of stable, testing or unstable" >&2
		;;
esac

SRC="$(pwd)"

# change to temporary directory to not interfere with the source
cd "$AUTOPKGTEST_TMP"

# coverage.sh expects the scripts to be in the current directory
# we copy make_mirror.sh instead of symlinking it because we are going to patch
# it
cp -a "$SRC/make_mirror.sh" make_mirror.sh
ln -s "$SRC/run_qemu.sh" run_qemu.sh
ln -s "$SRC/run_null.sh" run_null.sh
cp -a "$SRC/hooks" .
ln -s "$SRC/coverage.sh" coverage.sh
ln -s "$SRC/gpgvnoexpkeysig" gpgvnoexpkeysig
ln -s "$SRC/coverage.py" coverage.py
ln -s "$SRC/coverage.txt" coverage.txt
ln -s "$SRC/caching_proxy.py" caching_proxy.py
ln -s "$SRC/.perltidyrc" .perltidyrc
ln -s "$SRC/mmdebstrap-autopkgtest-build-qemu" mmdebstrap-autopkgtest-build-qemu
cp -a "$SRC/tests" .

# on Debian Salsa CI, $AUTOPKGTEST_NORMAL_USER is empty
if [ -z "$AUTOPKGTEST_NORMAL_USER" ]; then
	AUTOPKGTEST_NORMAL_USER=debci
	useradd --create-home --groups sudo "$AUTOPKGTEST_NORMAL_USER"
#	useradd --create-home --groups kvm "$AUTOPKGTEST_NORMAL_USER"
#	ls -lha /dev/kvm || true
#	lsmod | grep kvm || true
else
	adduser "$AUTOPKGTEST_NORMAL_USER" sudo
#	adduser "$AUTOPKGTEST_NORMAL_USER" kvm
fi

mkdir ./shared
chown "$AUTOPKGTEST_NORMAL_USER" ./shared

echo "$AUTOPKGTEST_NORMAL_USER ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers

# we cannot use mini_httpd (or most other http servers) because they perform a
# chdir() into the directory that is to be served on startup. But later on we
# completely remove and replace that directory when creating the Debian mirror.
# Thus we need a really stupid server which is able to cope with having its
# www-root being replaced under its feet.
#mini_httpd -D -h 127.0.0.1 -p 80 -u "$AUTOPKGTEST_NORMAL_USER" -T UTF-8 -dd "$AUTOPKGTEST_TMP/shared/cache" &
python3 -m http.server --directory="$AUTOPKGTEST_TMP/shared/cache" --bind 127.0.0.1 80 2>/dev/null &
HTTPD_PID=$!
trap "kill $HTTPD_PID" INT QUIT TERM EXIT

# create a fake mmdebstrap file in the current directory that coverage.sh can
# copy
cat << END > ./mmdebstrap
#!/usr/bin/perl
use strict;
use warnings;
exit(1)
END

# must not be used during testing -- installed version must be used instead
cat << END > ./tarfilter
#!/usr/bin/env python3
exit(1)
END

# add entries to /etc/subuid and /etc/subgid if they don't exist yet
if [ ! -e /etc/subuid ] || ! grep "$AUTOPKGTEST_NORMAL_USER" /etc/subuid; then
	echo "$AUTOPKGTEST_NORMAL_USER:100000:65536" >> /etc/subuid
fi
if [ ! -e /etc/subgid ] || ! grep "$AUTOPKGTEST_NORMAL_USER" /etc/subgid; then
	echo "$AUTOPKGTEST_NORMAL_USER:100000:65536" >> /etc/subgid
fi

ret=0
timeout 50m runuser -u "$AUTOPKGTEST_NORMAL_USER" -- env CMD=mmdebstrap DEFAULT_DIST=$DEFAULT_DIST RUN_MA_SAME_TESTS=$RUN_MA_SAME_TESTS HAVE_QEMU=no HAVE_BINFMT=no USE_HOST_APT_CONFIG=yes "$SRC/make_mirror.sh" || ret=$?
if [ "$ret" -ne 0 ]; then
	echo "./make_mirror.sh failed" >&2
	exit 77
fi

# subtract 10 seconds to account for the inaccuracy in measuring time
TIMEOUT=$((10000-$(date +%s)+$TIME_BEGIN-10))

# now run the script
# we set CMD so that Devel::Cover is not used
# HAVE_QEMU=no because there is no kvm kernel module
# HAVE_BINFMT=no because there is no binfmt_misc kernel module
ret=0
timeout $TIMEOUT runuser -u "$AUTOPKGTEST_NORMAL_USER" -- env CMD="mmdebstrap --setup-hook=$SRC/debian/tests/sourcesfilter --hook-dir=$SRC/hooks/file-mirror-automount" DEFAULT_DIST=$DEFAULT_DIST RUN_MA_SAME_TESTS=$RUN_MA_SAME_TESTS HAVE_QEMU=no HAVE_BINFMT=no USE_HOST_APT_CONFIG=yes "$SRC/coverage.sh" --exitfirst || ret=$?
if [ "$ret" -eq 124 ]; then
	echo "command timed out after $TIMEOUT seconds" >&2
	exit 77
elif [ "$ret" -ne 0 ]; then
	exit $ret
fi

# subtract 10 seconds to account for the inaccuracy in measuring time
TIMEOUT=$((10000-$(date +%s)+$TIME_BEGIN-10))

# exit successfully if there is not enough time left
if [ "$TIMEOUT" -lt 3000 ]; then
	echo "skipping remaining tests due to lack of remaining time" >&2
	exit 0
fi

du -hs ./shared

# FORCE_UPDATE=yes to force rebuilding the cache
# ONLY_HOSTARCH=yes to limit the number of downloaded content
# RUN_MA_SAME_TESTS=no because foreign arches are missing
ret=0
timeout $TIMEOUT runuser -u "$AUTOPKGTEST_NORMAL_USER" -- env CMD=mmdebstrap DEFAULT_DIST=$DEFAULT_DIST ONLY_HOSTARCH=yes FORCE_UPDATE=yes RUN_MA_SAME_TESTS=no HAVE_QEMU=no HAVE_BINFMT=no "$SRC/make_mirror.sh" || ret=$?
if [ "$ret" -ne 0 ]; then
	echo "./make_mirror.sh failed" >&2
	exit 77
fi

# subtract 10 seconds to account for the inaccuracy in measuring time
TIMEOUT=$((10000-$(date +%s)+$TIME_BEGIN-10))

# run only those tests that were skipped because of USE_HOST_APT_CONFIG=yes but
# ignore if any of them fails
# failures here are irrelevant for transition testing because they cannot
# respect the apt pinning options given by the test environment
SKIPPED_TESTS=$(grep-dctrl --exact-match --field Needs-APT-Config true --no-field-names --show-field=Test < coverage.txt)
# for tar1.txt also add create-directory test
SKIPPED_TESTS="create-directory $SKIPPED_TESTS"
timeout $TIMEOUT runuser -u "$AUTOPKGTEST_NORMAL_USER" -- env CMD="mmdebstrap" DEFAULT_DIST=$DEFAULT_DIST RUN_MA_SAME_TESTS=no HAVE_QEMU=no HAVE_BINFMT=no "$SRC/coverage.py" --exitfirst $SKIPPED_TESTS || exit 77

du -hs ./shared

exit 0