#!/bin/sh
set -e

TESTDIR="$(readlink -f "$(dirname "$0")")"
. "$TESTDIR/framework"

setupenvironment
configarchitecture 'i386'
LOWCOSTEXT='lz4'

buildaptarchive
setupflataptarchive
changetowebserver

cat >rootdir/etc/apt/apt.conf.d/contents.conf <<EOF
Acquire::IndexTargets::deb::Contents {
	MetaKey "\$(COMPONENT)/Contents-\$(ARCHITECTURE)";
	ShortDescription "Contents";
	Description "\$(RELEASE)/\$(COMPONENT) \$(ARCHITECTURE) Contents";
	MetaKey "\$(COMPONENT)/Contents-\$(ARCHITECTURE)";
	flatMetaKey "Contents-\$(ARCHITECTURE)";
	flatDescription "\$(RELEASE) \$(ARCHITECTURE) Contents";
};
EOF

PKGFILE="${TESTDIR}/$(echo "$(basename $0)" | sed 's#^test-#Packages-#')"
echo 'contents for stuff' > aptarchive/Contents-i386
compressfile aptarchive/Contents-i386
echo 'hacked' > aptarchive/hacked-i386
compressfile aptarchive/hacked-i386

wasmergeused() {
	if echo "$*" | grep -q -- '-o test::cannot-use-pdiff=1'; then
		find rootdir/var/lib/apt/lists/partial -name '*-patched*' -delete
	fi

	testsuccess apt update "$@"
	#apt update "$@" 2>&1 | tee rootdir/tmp/testsuccess.output

	msgtest 'No intermediate patch files' 'still exist'
	testempty --nomsg find rootdir/var/lib/apt/lists -name '*.ed' -o -name '*.ed.*' -o -name '*.diff_Index' -o -name '*.diff_Index.xz'

	if echo "$*" | grep -q -- '-o test::cannot-use-pdiff=1'; then
		msgtest 'Check if pdiff was' 'not used'
		cp -a rootdir/tmp/testsuccess.output rootdir/tmp/aptupdate.output
		testsuccess --nomsg grep "^Ign:.*  Packages\.diff/Index" rootdir/tmp/aptupdate.output
		return;
	fi

	msgtest 'Check if the right pdiff merger was used'
	if grep -q '^pkgAcqIndexMergeDiffs::Done(): rred' rootdir/tmp/testsuccess.output; then
		if echo "$*" | grep -q -- '-o Acquire::PDiffs::Merge=1'; then
			msgpass
		else
			msgfail "Merge shouldn't have been used, but was"
		fi
	elif echo "$*" | grep -q -- '-o Acquire::PDiffs::Merge=1'; then
		msgfail "Merge should have been used, but wasn't"
	else
		msgpass
	fi

	testequal '1' grep -c rred:601 rootdir/tmp/testsuccess.output
}

testrun() {
	configcompression '.' 'xz'
	msgmsg "Testcase: setup the base with: $*"
	find aptarchive -name 'Packages*' -type f -delete
	cp "${PKGFILE}" aptarchive/Packages
	compressfile 'aptarchive/Packages'
	generatereleasefiles
	signreleasefiles
	rm -rf aptarchive/Packages.diff rootdir/var/lib/apt/lists rootdir/var/lib/apt/lists-bak
	testsuccess aptget update "$@"
	cp -a rootdir/var/lib/apt/lists rootdir/var/lib/apt/lists-bak
	testnopackage newstuff
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt oldstuff
	configcompression '.' 'gz'

	# see if the code deals properly with leftover partial files
	partialleftovers

	msgmsg "Testcase: apply with one patch: $*"
	find aptarchive -name 'Packages*' -type f -delete
	cp "${PKGFILE}-new" aptarchive/Packages
	compressfile 'aptarchive/Packages'
	mkdir -p aptarchive/Packages.diff
	PATCHFILE="aptarchive/Packages.diff/$(date +%Y-%m-%d-%H%M.%S)"
	diff -e "${PKGFILE}" "${PKGFILE}-new" > "${PATCHFILE}" || true
	cat "$PATCHFILE" | gzip > "${PATCHFILE}.gz"
	PATCHINDEX='aptarchive/Packages.diff/Index'
	echo "SHA256-Current: $(sha256sum "${PKGFILE}-new" | cut -d' ' -f 1) $(stat -c%s "${PKGFILE}-new")
SHA256-History:
 $(sha256sum "$PKGFILE" | cut -d' ' -f 1) $(stat -c%s "$PKGFILE") 2000-08-18-2013.28
 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b 33053002 2010-08-18-2013.28
 $(sha256sum "$PKGFILE" | cut -d' ' -f 1) $(stat -c%s "$PKGFILE") $(basename "$PATCHFILE")
SHA256-Patches:
 $(sha256sum "$PATCHFILE" | cut -d' ' -f 1) $(stat -c%s "$PATCHFILE") 2000-08-18-2013.28
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 19722 2010-08-18-2013.28
 $(sha256sum "$PATCHFILE" | cut -d' ' -f 1) $(stat -c%s "$PATCHFILE") $(basename "$PATCHFILE")
SHA256-Download:
 $(sha256sum "${PATCHFILE}.gz" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE}.gz") 2000-08-18-2013.28.gz
 d2a1b33187ed2d248eeae3b1223ea71791ea35f2138a713ed371332a6421f467 197 2010-08-18-2013.28.gz
 $(sha256sum "${PATCHFILE}.gz" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE}.gz") $(basename "${PATCHFILE}.gz")" > "$PATCHINDEX"

	generatereleasefiles '+1hour'
	signreleasefiles
	find aptarchive -name 'Packages*' -type f -delete
	wasmergeused "$@"
	testnopackage oldstuff
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt newstuff

	msgmsg "Testcase: apply with compressed Index and one patch: $*"
	cp "${PKGFILE}-new" aptarchive/Packages
	compressfile 'aptarchive/Packages'
	cat "$PATCHINDEX" | gzip > "${PATCHINDEX}.gz"
	generatereleasefiles '+1hour'
	signreleasefiles
	find aptarchive -name 'Packages*' -type f -delete
	rm "$PATCHINDEX"
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	wasmergeused "$@"
	testnopackage oldstuff
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt newstuff

	msgmsg "Testcase: apply with by-hash compressed Index and one patch: $*"
	local NORMAL="$(readlink -f "./aptarchive/Packages.diff")"
	local BYHASH="${NORMAL}/by-hash/SHA256"
	mkdir -p "${BYHASH}"
	find "${NORMAL}/" -maxdepth 1 -name "Index*" -exec mv '{}' "$BYHASH" \;
	ln -s "${BYHASH}/Index.gz" "${BYHASH}/$(sha256sum "${BYHASH}/Index.gz" | cut -f1 -d' ')"
	echo 'foobar' > "${BYHASH}/$(sha256sum "$PATCHFILE" | cut -f1 -d' ')"
	echo 'foobar' > "${BYHASH}/$(sha256sum "${PATCHFILE}.gz" | cut -f1 -d' ')"
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	wasmergeused "$@" -o Acquire::By-Hash=force
	testnopackage oldstuff
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt newstuff

	msgmsg "Testcase: SHA1-only patches are not used: $*"
	find aptarchive -name 'Packages*' -type f -delete
	cp "${PKGFILE}-new" aptarchive/Packages
	compressfile 'aptarchive/Packages'
	mkdir -p aptarchive/Packages.diff
	PATCHFILE="aptarchive/Packages.diff/$(date +%Y-%m-%d-%H%M.%S)"
	diff -e "${PKGFILE}" "${PKGFILE}-new" > "${PATCHFILE}" || true
	cat "$PATCHFILE" | gzip > "${PATCHFILE}.gz"
	PATCHINDEX='aptarchive/Packages.diff/Index'
	echo "SHA1-Current: $(sha1sum "${PKGFILE}-new" | cut -d' ' -f 1) $(stat -c%s "${PKGFILE}-new")
SHA1-History:
 9f4148e06d7faa37062994ff10d0c842d7017513 33053002 2010-08-18-2013.28
 $(sha1sum "$PKGFILE" | cut -d' ' -f 1) $(stat -c%s "$PKGFILE") $(basename "$PATCHFILE")
SHA1-Patches:
 7651fc0ac57cd83d41c63195a9342e2db5650257 19722 2010-08-18-2013.28
 $(sha1sum "$PATCHFILE" | cut -d' ' -f 1) $(stat -c%s "$PATCHFILE") $(basename "$PATCHFILE")
SHA1-Download:
 2365ac0ac57cde3d43c63145e8251a3bd5410213 197 2010-08-18-2013.28.gz
 $(sha1sum "${PATCHFILE}.gz" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE}.gz") $(basename "${PATCHFILE}.gz")" > "$PATCHINDEX"
	generatereleasefiles '+1hour'
	signreleasefiles
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	wasmergeused "$@" -o test::cannot-use-pdiff=1
	testnopackage oldstuff
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt newstuff

	msgmsg "Testcase: no download-hashes patches are not used: $*"
	find aptarchive -name 'Packages*' -type f -delete
	cp "${PKGFILE}-new" aptarchive/Packages
	compressfile 'aptarchive/Packages'
	mkdir -p aptarchive/Packages.diff
	PATCHFILE="aptarchive/Packages.diff/$(date +%Y-%m-%d-%H%M.%S)"
	diff -e "${PKGFILE}" "${PKGFILE}-new" > "${PATCHFILE}" || true
	cat "$PATCHFILE" | gzip > "${PATCHFILE}.gz"
	PATCHINDEX='aptarchive/Packages.diff/Index'
	echo "SHA256-Current: $(sha256sum "${PKGFILE}-new" | cut -d' ' -f 1) $(stat -c%s "${PKGFILE}-new")
SHA256-History:
 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b 33053002 2010-08-18-2013.28
 $(sha256sum "$PKGFILE" | cut -d' ' -f 1) $(stat -c%s "$PKGFILE") $(basename "$PATCHFILE")
SHA256-Patches:
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 19722 2010-08-18-2013.28
 $(sha256sum "$PATCHFILE" | cut -d' ' -f 1) $(stat -c%s "$PATCHFILE") $(basename "$PATCHFILE")" > "$PATCHINDEX"
	generatereleasefiles '+1hour'
	signreleasefiles
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	wasmergeused "$@" -o test::cannot-use-pdiff=1
	testnopackage oldstuff
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt newstuff

	msgmsg "Testcase: apply with two patches: $*"
	cp "${PKGFILE}-new" aptarchive/Packages
	echo '
Package: futurestuff
Version: 1.0
Architecture: i386
Maintainer: Joe Sixpack <joe@example.org>
Installed-Size: 202
Filename: pool/futurestuff_1.0_i386.deb
Size: 202200
SHA256: b46fd154615edaae5ba33c56a5cc0e7deaef23e2da3e4f129727fd660f28f050
Description: some cool and shiny future stuff
 This package will appear in the next^2 mirror update
Description-md5: d5f89fbbc2ce34c455dfee9b67d82b6b' >> aptarchive/Packages

	compressfile 'aptarchive/Packages'
	PATCHFILE2="aptarchive/Packages.diff/$(date -d 'now + 1hour' '+%Y-%m-%d-%H%M.%S')"
	diff -e "${PKGFILE}-new" aptarchive/Packages > "${PATCHFILE2}" || true
	cat "$PATCHFILE2" | gzip > "${PATCHFILE2}.gz"
	echo "SHA256-Current: $(sha256sum aptarchive/Packages | cut -d' ' -f 1) $(stat -c%s aptarchive/Packages)
SHA256-History:
 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b 33053002 2010-08-18-2013.28
 $(sha256sum "$PKGFILE" | cut -d' ' -f 1) $(stat -c%s "$PKGFILE") $(basename "$PATCHFILE")
 $(sha256sum "${PKGFILE}-new" | cut -d' ' -f 1) $(stat -c%s "${PKGFILE}-new") $(basename "${PATCHFILE2}")
SHA256-Patches:
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 19722 2010-08-18-2013.28
 $(sha256sum "$PATCHFILE" | cut -d' ' -f 1) $(stat -c%s "$PATCHFILE") $(basename "$PATCHFILE")
 $(sha256sum "${PATCHFILE2}" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE2}") $(basename "${PATCHFILE2}")
SHA256-Download:
 d2a1b33187ed2d248eeae3b1223ea71791ea35f2138a713ed371332a6421f467 197 2010-08-18-2013.28.gz
 $(sha256sum "${PATCHFILE}.gz" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE}.gz") $(basename "${PATCHFILE}.gz")
 $(sha256sum "${PATCHFILE2}.gz" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE2}.gz") $(basename "${PATCHFILE2}.gz")" > "$PATCHINDEX"

	generatereleasefiles '+2hour'
	signreleasefiles
	cp -a aptarchive/Packages Packages-future
	find aptarchive -name 'Packages*' -type f -delete
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	wasmergeused "$@"
	testnopackage oldstuff
	testsuccessequal "$(cat Packages-future)
" aptcache show apt newstuff futurestuff

	# we reuse the archive state of the previous test here
	msgmsg "Testcase: pdiff handling is stopped if transaction fails $*"
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	cp Packages-future aptarchive/Packages
	rm -f rootdir/var/lib/apt/lists/*_Contents-* rootdir/var/lib/apt/lists/*.diff_Index*
	webserverconfig 'aptwebserver::overwrite::.*Contents-.*::filename' '/hacked-i386.gz'
	testfailure apt update "$@"
	cp rootdir/tmp/testfailure.output patchdownload.output
	webserverconfig 'aptwebserver::overwrite::.*Contents-.*::filename' '/Contents-i386.gz'
	testfailure grep -q -z 'AbortTransaction.* [a-zA-Z0-9+-]\+:600%20' patchdownload.output
	testnopackage newstuff futurestuff
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt oldstuff

	# we reuse the entire state of the previous test here
	msgmsg "Testcase: good files from previous fails are picked up from partial: $*"
	wasmergeused "$@"
	testfailure grep '^GET /Packages.diff/Index HTTP/1.1' rootdir/tmp/testsuccess.output
	testnopackage oldstuff
	testsuccessequal "$(cat Packages-future)
" aptcache show apt newstuff futurestuff

	# we reuse the archive state of the previous test here
	msgmsg "Testcase: downloading a patch fails, but successful fallback: $*"
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	cp Packages-future aptarchive/Packages
	rm "${PATCHFILE}.gz"
	testsuccess apt update "$@"
	cp rootdir/tmp/testsuccess.output patchdownload.output
	# it should be anchored on line start, but multiple processes on the same output stream…
	testsuccess grep 'Falling back to normal index file acquire' patchdownload.output
	testnopackage oldstuff
	testsuccessequal "$(cat Packages-future)
" aptcache show apt newstuff futurestuff

	msgmsg "Testcase: patch applying fails, but successful fallback: $*"
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	cp "${PKGFILE}-new" aptarchive/Packages
	compressfile 'aptarchive/Packages'
	mkdir -p aptarchive/Packages.diff
	PATCHFILE="aptarchive/Packages.diff/$(date +%Y-%m-%d-%H%M.%S)"
	diff -e "${PKGFILE}" "${PKGFILE}-new" > "${PATCHFILE}" || true
	cat "$PATCHFILE" | gzip > "${PATCHFILE}.gz"
	PATCHINDEX='aptarchive/Packages.diff/Index'
	echo "SHA256-Current: $(sha256sum "${PKGFILE}-new" | cut -d' ' -f 1) $(stat -c%s "${PKGFILE}-new")
SHA256-History:
 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b 33053002 2010-08-18-2013.28
 $(sha256sum "$PKGFILE" | cut -d' ' -f 1) $(stat -c%s "$PKGFILE") $(basename "$PATCHFILE")
SHA256-Patches:
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 19722 2010-08-18-2013.28
 $(sha256sum "$PATCHFILE" | cut -d' ' -f 1) $(stat -c%s "$PATCHFILE") $(basename "$PATCHFILE")
SHA256-Download:
 d2a1b33187ed2d248eeae3b1223ea71791ea35f2138a713ed371332a6421f467 197 2010-08-18-2013.28.gz
 $(sha256sum "${PATCHFILE}.gz" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE}.gz") $(basename "${PATCHFILE}.gz")" > "$PATCHINDEX"
	breakfiles "$PATCHFILE" "${PATCHFILE}.gz"
	generatereleasefiles '+1hour'
	signreleasefiles
	testsuccess apt update "$@"
	cp -f rootdir/tmp/testsuccess.output rootdir/tmp/aptupdate.output
	testsuccess grep 'Hash Sum mismatch' rootdir/tmp/aptupdate.output
	testnopackage oldstuff
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt newstuff

	msgmsg "Testcase: pdiff patch bigger than index itself: $*"
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	# the general testcode checks for leftovers in partial, but as this file
	# is never touched in this test as it exits earlier its not a leftover…
	rm -f rootdir/var/lib/apt/lists/partial/localhost:${APTHTTPPORT}_Packages
	cp "${PKGFILE}-new" aptarchive/Packages
	compressfile 'aptarchive/Packages'
	mkdir -p aptarchive/Packages.diff
	PATCHFILE="aptarchive/Packages.diff/$(date +%Y-%m-%d-%H%M.%S)"
	diff -e "${PKGFILE}" "${PKGFILE}-new" > "${PATCHFILE}" || true
	cat "$PATCHFILE" | gzip > "${PATCHFILE}.gz"
	PATCHINDEX='aptarchive/Packages.diff/Index'
	echo "SHA256-Current: $(sha256sum "${PKGFILE}-new" | cut -d' ' -f 1) $(stat -c%s "${PKGFILE}-new")
SHA256-History:
 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b 33053002 2010-08-18-2013.28
 $(sha256sum "$PKGFILE" | cut -d' ' -f 1) $(stat -c%s "$PKGFILE") $(basename "$PATCHFILE")
SHA256-Patches:
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 19722 2010-08-18-2013.28
 $(sha256sum "$PATCHFILE" | cut -d' ' -f 1) $(stat -c%s "$PATCHFILE") $(basename "$PATCHFILE")
SHA256-Download:
 d2a1b33187ed2d248eeae3b1223ea71791ea35f2138a713ed371332a6421f467 197 2010-08-18-2013.28.gz
 $(sha256sum "${PATCHFILE}.gz" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE}.gz")000 $(basename "${PATCHFILE}.gz")" > "$PATCHINDEX"
	generatereleasefiles '+1hour'
	signreleasefiles
	wasmergeused "$@" -o test::cannot-use-pdiff=1
	testsuccess grep 'bytes, but limit is' rootdir/tmp/aptupdate.output
	testnopackage oldstuff
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt newstuff

	msgmsg "Testcase: pdiff index failed to download: $*"
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	cp "${PKGFILE}-new" aptarchive/Packages
	compressfile 'aptarchive/Packages'
	mkdir -p aptarchive/Packages.diff
	PATCHFILE="aptarchive/Packages.diff/$(date +%Y-%m-%d-%H%M.%S)"
	diff -e "${PKGFILE}" "${PKGFILE}-new" > "${PATCHFILE}" || true
	cat "$PATCHFILE" | gzip > "${PATCHFILE}.gz"
	PATCHINDEX='aptarchive/Packages.diff/Index'
	echo "SHA256-Current: $(sha256sum "${PKGFILE}-new" | cut -d' ' -f 1) $(stat -c%s "${PKGFILE}-new")
SHA256-History:
 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b 33053002 2010-08-18-2013.28
 $(sha256sum "$PKGFILE" | cut -d' ' -f 1) $(stat -c%s "$PKGFILE") $(basename "$PATCHFILE")
SHA256-Patches:
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 19722 2010-08-18-2013.28
 $(sha256sum "$PATCHFILE" | cut -d' ' -f 1) $(stat -c%s "$PATCHFILE") $(basename "$PATCHFILE")
SHA256-Download:
 d2a1b33187ed2d248eeae3b1223ea71791ea35f2138a713ed371332a6421f467 197 2010-08-18-2013.28.gz
 $(sha256sum "${PATCHFILE}.gz" | cut -d' ' -f 1) $(stat -c%s "${PATCHFILE}.gz") $(basename "${PATCHFILE}.gz")" > "$PATCHINDEX"
	generatereleasefiles '+1hour'
	signreleasefiles
	# we let it fail by removing the files so the webserver reports 404
	rm -f "$PATCHINDEX" "$PATCHFILE" "${PATCHFILE}.gz"
	wasmergeused "$@" -o test::cannot-use-pdiff=1
	testsuccess grep '400%20URI%20Failure.*FailReason.*HttpError404.*Packages\.diff/Index' rootdir/tmp/aptupdate.output
	testnopackage oldstuff
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt newstuff
}
echo 'Debug::pkgAcquire::Diffs "true";
Debug::Acquire::Transaction "true";
Debug::pkgAcquire::Worker "true";
Debug::Acquire::http "true";
Debug::pkgAcquire "true";
Debug::Acquire::rred "true";' > rootdir/etc/apt/apt.conf.d/rreddebug.conf

testcase() {
	testrun -o Acquire::PDiffs::Merge=0 -o APT::Get::List-Cleanup=1 "$@"
	testrun -o Acquire::PDiffs::Merge=1 -o APT::Get::List-Cleanup=1 "$@"
	testrun -o Acquire::PDiffs::Merge=0 -o APT::Get::List-Cleanup=0 "$@"
	testrun -o Acquire::PDiffs::Merge=1 -o APT::Get::List-Cleanup=0 "$@"
}
generatepartialleftovers() {
	local PREFIX="$1"
	shift
	for f in "$@"; do
		cat "${PKGFILE}" "${PKGFILE}" > "rootdir/var/lib/apt/lists-bak/partial/localhost:${APTHTTPPORT}_${PREFIX}${f}"
		printf '\n\nInvalid\nStanza: yes\n\n' >> "rootdir/var/lib/apt/lists-bak/partial/localhost:${APTHTTPPORT}_${PREFIX}${f}"
		chmod 777 "rootdir/var/lib/apt/lists-bak/partial/localhost:${APTHTTPPORT}_${PREFIX}${f}"
	done
	printf '\n\nInvalid\nStanza: yes\n\n' > "rootdir/var/lib/apt/lists-bak/localhost:${APTHTTPPORT}_${PREFIX}Packages.diff_Index"
	chmod 777 "rootdir/var/lib/apt/lists-bak/localhost:${APTHTTPPORT}_${PREFIX}Packages.diff_Index"
	printf '\n\nInvalid\nStanza: yes\n\n' > "rootdir/var/lib/apt/lists-bak/localhost:${APTHTTPPORT}_${PREFIX}Packages.diff_Index.xz"
	chmod 777 "rootdir/var/lib/apt/lists-bak/localhost:${APTHTTPPORT}_${PREFIX}Packages.diff_Index.xz"
}

partialleftovers() { generatepartialleftovers '' 'Packages' 'Packages-patched'; }
aptautotest_apt_update() { aptautotest_aptget_update "$@"; testsuccess test -e "rootdir/var/lib/apt/lists/localhost:${APTHTTPPORT}_Packages"; }
testcase -o Acquire::IndexTargets::deb::Packages::KeepCompressed=false
partialleftovers() { generatepartialleftovers '' "Packages.${LOWCOSTEXT}" "Packages-patched.${LOWCOSTEXT}"; }
aptautotest_apt_update() { aptautotest_aptget_update "$@"; testsuccess test -e "rootdir/var/lib/apt/lists/localhost:${APTHTTPPORT}_Packages.$LOWCOSTEXT"; }
testcase -o Acquire::IndexTargets::deb::Packages::KeepCompressed=true


partialleftovers() { generatepartialleftovers 'redirectme_' "Packages.${LOWCOSTEXT}" "Packages-patched.${LOWCOSTEXT}"; }
# redirect the InRelease file only – the other files are auto-redirected by apt
webserverconfig 'aptwebserver::redirect::replace::/redirectme/I' "http://0.0.0.0:${APTHTTPPORT}/I"
rewritesourceslist "http://localhost:${APTHTTPPORT}/redirectme"
aptautotest_apt_update() {
	aptautotest_aptget_update "$@"
	testsuccess test -e "rootdir/var/lib/apt/lists/localhost:${APTHTTPPORT}_redirectme_Packages.$LOWCOSTEXT"
	testempty find rootdir/var/lib/apt/lists -type f \! \( -name lock -o -name '*_redirectme_*' \)
}
testcase -o Acquire::IndexTargets::deb::Packages::KeepCompressed=true