3 files changed, 127 insertions, 0 deletions
diff --git a/tests/chrootless b/tests/chrootless
new file mode 100644
index 0000000..77490c3
--- /dev/null
+++ b/tests/chrootless
@@ -0,0 +1,16 @@
+#!/bin/sh
+set -eu
+export LC_ALL=C.UTF-8
+export SOURCE_DATE_EPOCH={{ SOURCE_DATE_EPOCH }}
+trap "rm -f /tmp/chrootless.tar /tmp/root.tar" EXIT INT TERM
+# we need --hook-dir=./hooks/merged-usr because usrmerge does not understand
+# DPKG_ROOT
+for INCLUDE in '' 'apt' 'apt,build-essential' 'systemd-sysv'; do
+	for MODE in root chrootless; do
+		{{ CMD }} --mode=$MODE --variant={{ VARIANT }} --hook-dir=./hooks/merged-usr \
+			${INCLUDE:+--include="$INCLUDE"} --skip=check/chrootless \
+			{{ DIST }} "/tmp/$MODE.tar" {{ MIRROR }}
+	done
+	cmp /tmp/root.tar /tmp/chrootless.tar || diffoscope /tmp/root.tar /tmp/chrootless.tar
+	rm /tmp/chrootless.tar /tmp/root.tar
+done
diff --git a/tests/chrootless-fakeroot b/tests/chrootless-fakeroot
new file mode 100644
index 0000000..8821fa6
--- /dev/null
+++ b/tests/chrootless-fakeroot
@@ -0,0 +1,43 @@
+#!/bin/sh
+set -eu
+export LC_ALL=C.UTF-8
+export SOURCE_DATE_EPOCH={{ SOURCE_DATE_EPOCH }}
+trap "rm -f /tmp/chrootless.tar /tmp/root.tar" EXIT INT TERM
+
+[ {{ MODE }} = chrootless ]
+
+prefix=
+if [ "$(id -u)" -eq 0 ] && [ "{{ MODE }}" != "root" ] && [ "{{ MODE }}" != "auto" ]; then
+	if ! id "${SUDO_USER:-user}" >/dev/null 2>&1; then
+		if [ ! -e /mmdebstrap-testenv ]; then
+			echo "this test modifies the system and should only be run inside a container" >&2
+			exit 1
+		fi
+		useradd --home-dir "/home/${SUDO_USER:-user}" --create-home "${SUDO_USER:-user}"
+	fi
+	prefix="runuser -u ${SUDO_USER:-user} --"
+fi
+
+MMTARFILTER=
+[ -x /usr/bin/mmtarfilter ] && MMTARFILTER=/usr/bin/mmtarfilter
+[ -x ./tarfilter ] && MMTARFILTER=./tarfilter
+
+# we need --hook-dir=./hooks/merged-usr because usrmerge does not understand
+# DPKG_ROOT
+# permissions drwxr-sr-x and extended attributes of ./var/log/journal/ cannot
+# be preserved under fakeroot
+# this applies to 'z' lines in files in /usr/lib/tmpfiles.d/
+for INCLUDE in '' 'apt' 'apt,build-essential' 'systemd-sysv'; do
+	{{ CMD }} --variant={{ VARIANT }} --hook-dir=./hooks/merged-usr \
+		${INCLUDE:+--include="$INCLUDE"} \
+		{{ DIST }} - {{ MIRROR }} \
+		| "$MMTARFILTER" --path-exclude="/var/log/journal" --path-exclude="/etc/credstore*" \
+		>/tmp/root.tar
+	$prefix fakeroot {{ CMD }} --mode={{ MODE }} --variant={{ VARIANT }} --hook-dir=./hooks/merged-usr \
+		${INCLUDE:+--include="$INCLUDE"} \
+		{{ DIST }} - {{ MIRROR }} \
+		| "$MMTARFILTER" --path-exclude="/var/log/journal" --path-exclude="/etc/credstore*" \
+		> /tmp/chrootless.tar
+	cmp /tmp/root.tar /tmp/chrootless.tar || diffoscope /tmp/root.tar /tmp/chrootless.tar
+	rm /tmp/chrootless.tar /tmp/root.tar
+done
diff --git a/tests/chrootless-foreign b/tests/chrootless-foreign
new file mode 100644
index 0000000..03203d0
--- /dev/null
+++ b/tests/chrootless-foreign
@@ -0,0 +1,68 @@
+#!/bin/sh
+set -eu
+export LC_ALL=C.UTF-8
+export SOURCE_DATE_EPOCH={{ SOURCE_DATE_EPOCH }}
+trap "rm -f /tmp/chrootless.tar /tmp/root.tar" EXIT INT TERM
+if [ ! -e /mmdebstrap-testenv ]; then
+	echo "this test modifies the system and should only be run inside a container" >&2
+	exit 1
+fi
+
+deb2qemu() {
+	case "$1" in
+		amd64) echo x86_64;;
+		arm64) echo aarch64;;
+		armel|armhf) echo arm;;
+		ppc64el) echo ppc64le;;
+		*) echo "$1";;
+	esac
+}
+if [ "$(dpkg --print-architecture)" = "arm64" ]; then
+	arch=amd64
+else
+	arch=arm64
+fi
+
+[ "$(id -u)" -eq 0 ]
+[ -e "/proc/sys/fs/binfmt_misc/qemu-$(deb2qemu "$arch")" ]
+
+
+# we need --hook-dir=./hooks/merged-usr because usrmerge does not understand
+# DPKG_ROOT
+#
+# dpkg is unable to install architecture arch:all packages with a
+# dependency on an arch:any package (perl-modules-5.34 in this case)
+# inside foreign architecture chrootless chroots, because dpkg will use
+# its own architecture as the native architecture, see #825385 and #1020533
+# So we are not testing the installation of apt,build-essential here.
+for INCLUDE in '' 'apt' 'systemd-sysv'; do
+	echo 1 > "/proc/sys/fs/binfmt_misc/qemu-$(deb2qemu "$arch")"
+	arch-test "$arch"
+	{{ CMD }} --mode=root --architecture="$arch" --variant={{ VARIANT }} \
+		--hook-dir=./hooks/merged-usr ${INCLUDE:+--include="$INCLUDE"} \
+		{{ DIST }} "/tmp/root.tar" {{ MIRROR }}
+	echo 0 > "/proc/sys/fs/binfmt_misc/qemu-$(deb2qemu "$arch")"
+	arch-test "$arch" && exit 1
+	{{ CMD }} --mode=chrootless --architecture="$arch" --variant={{ VARIANT }} \
+		--hook-dir=./hooks/merged-usr ${INCLUDE:+--include="$INCLUDE"} \
+		--skip=check/chrootless {{ DIST }} "/tmp/chrootless.tar" {{ MIRROR }}
+	# when creating a foreign architecture chroot, the tarballs are not
+	# bit-by-bit identical but contain a few remaining differences:
+	#
+	#  * /etc/ld.so.cache -- hard problem, must be solved in glibc upstream
+	#  * /var/lib/dpkg/triggers -- #990712
+	#  * /var/cache/debconf/*.dat-old -- needs investigation
+	for tar in root chrootless; do
+		<"/tmp/$tar.tar" \
+		./tarfilter \
+			--path-exclude=/var/cache/debconf/config.dat-old \
+			--path-exclude=/var/cache/debconf/templates.dat-old \
+			--path-exclude=/etc/ld.so.cache \
+			--path-exclude=/var/lib/dpkg/triggers/File \
+			--path-exclude=/var/lib/dpkg/triggers/ldconfig \
+			> "/tmp/$tar.tar.tmp"
+		mv "/tmp/$tar.tar.tmp" "/tmp/$tar.tar"
+	done
+	cmp /tmp/root.tar /tmp/chrootless.tar || diffoscope /tmp/root.tar /tmp/chrootless.tar
+	rm /tmp/chrootless.tar /tmp/root.tar
+done