4 files changed, 98 insertions, 0 deletions
diff --git a/share/customize-autologin.sh b/share/customize-autologin.sh
new file mode 100755
index 0000000..b9a4a8b
--- /dev/null
+++ b/share/customize-autologin.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+# Copyright 2022 Helmut Grohne <helmut@subdivi.de>
+# SPDX-License-Identifier: MIT
+#
+# This is a mmdebstrap customize hook that configures automatic root login on a
+# serial console. It also parses the debvm.term kernel cmdline and passes it as
+# TERM to agetty.
+
+set -eu
+
+TARGET=$1
+
+UNIT=serial-getty@.service
+
+mkdir "$TARGET/etc/systemd/system/$UNIT.d"
+
+(
+	echo '[Service]'
+	printf '%s\n' 'ExecStartPre=/bin/sed -n -e "s/^\\(.* \\)\\?\\(TERM=[^ ]*\\).*/\\2/w/run/debvmterm" /proc/cmdline'
+	echo 'EnvironmentFile=-/run/debvmterm'
+	echo 'ExecStart='
+	sed -n 's,^ExecStart=-/sbin/agetty ,&-a root ,p' "$TARGET/lib/systemd/system/$UNIT"
+) > "$TARGET/etc/systemd/system/$UNIT.d/autologin.conf"
diff --git a/share/customize-dpkgavailable.sh b/share/customize-dpkgavailable.sh
new file mode 100755
index 0000000..f35b81f
--- /dev/null
+++ b/share/customize-dpkgavailable.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+# Copyright 2022 Helmut Grohne <helmut@subdivi.de>
+# SPDX-License-Identifier: MIT
+#
+# This is a mmdebstrap customize hook that initializes dpkg's available
+# database from an updated apt package list cache.
+#
+# Without the available database, dpkg --set-selections won't work.
+
+set -eu
+
+APT_CONFIG=$MMDEBSTRAP_APT_CONFIG apt-cache dumpavail | dpkg --root "$1" --update-avail
diff --git a/share/customize-networkd.sh b/share/customize-networkd.sh
new file mode 100755
index 0000000..c89aae2
--- /dev/null
+++ b/share/customize-networkd.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+# Copyright 2022 Helmut Grohne <helmut@subdivi.de>
+# SPDX-License-Identifier: MIT
+#
+# This is a mmdebstrap customize hook that enables and configures
+# systemd-networkd on various Debian releases.
+
+set -eu
+
+TARGET=$1
+
+SYSTEMD_VERSION=$(dpkg-query --root "$TARGET" -f '${Version}' -W systemd)
+
+if test "${MMDEBSTRAP_MODE:-}" = chrootless; then
+	systemctl --root "$TARGET" enable systemd-networkd.service
+else
+	chroot "$TARGET" systemctl enable systemd-networkd.service
+fi
+
+{
+	echo '[Match]'
+	echo 'Name=en*'
+	if dpkg --compare-versions "$SYSTEMD_VERSION" lt 220-7~; then
+		echo 'Name=eth*'
+	fi
+
+	echo '[Network]'
+	echo 'DHCP=yes'
+
+	if dpkg --compare-versions "$SYSTEMD_VERSION" lt 249; then
+		# This anchor is included by default since bullseye. Fails DNSSEC
+		# validation when missing.
+		echo 'DNSSECNegativeTrustAnchors=home.arpa'
+	fi
+	echo '[DHCP]'
+	echo 'UseDomains=yes'
+} >"$TARGET/etc/systemd/network/20-wired.network"
diff --git a/share/customize-resolved.sh b/share/customize-resolved.sh
new file mode 100755
index 0000000..e8fe248
--- /dev/null
+++ b/share/customize-resolved.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+# Copyright 2022 Helmut Grohne <helmut@subdivi.de>
+# SPDX-License-Identifier: MIT
+#
+# This is a mmdebstrap customize hook that enables systemd-resolved on various
+# Debian releases.
+
+set -eu
+
+TARGET=$1
+
+LIBNSS_RESOLVE_VERSION=$(dpkg-query --root "$TARGET" -f '${Version}' -W libnss-resolve 2>/dev/null) || :
+
+if dpkg --compare-versions "$LIBNSS_RESOLVE_VERSION" lt 251.3-2~exp1; then
+	if test "${MMDEBSTRAP_MODE:-}" = chrootless; then
+		systemctl --root "$TARGET" enable systemd-resolved.service
+	else
+		chroot "$TARGET" systemctl enable systemd-resolved.service
+	fi
+
+	if test -z "$LIBNSS_RESOLVE_VERSION"; then
+		ln -fs ../run/systemd/resolve/resolv.conf "$TARGET/etc/resolv.conf"
+	else
+		ln -fs ../run/systemd/resolve/stub-resolv.conf "$TARGET/etc/resolv.conf"
+	fi
+fi