port live to new erofs as root

major change is that live data is now in /live (/live continues to not
appear on the final system because we selectively mount /usr only)

mkosi.extra/live/usr/bin/_kde-linux-live-setup

@@ -10,13 +10,14 @@ if ! grep "kde-linux.live=1" /proc/cmdline; then
     exit 1
 fi
 
-if [ "$(readlink --canonicalize /dev/disk/by-label/KDELinuxLive)" != "$(readlink --canonicalize /dev/gpt-auto-root)" ]; then
+if [ "$(readlink --canonicalize /dev/disk/by-partlabel/KDELinuxLive)" != "$(readlink --canonicalize /dev/gpt-auto-root)" ]; then
     echo "gpt-auto-root is not KDELinuxLive"
     exit 1
 fi
 
 mkdir --mode 0755 /run/extensions/
-ln -s /system/@live /run/extensions/live
+# Mind that /live is only available if the erofs is mounted as rootfs. On the final system we selectively only mount usr from the erofs!
+ln -s /live /run/extensions/live
 systemd-sysext refresh
 
 useradd --create-home --comment "Live User" live
@@ -29,7 +30,7 @@ ln -s ../usr/share/zoneinfo/UTC /etc/localtime
 timedatectl set-timezone UTC
 localectl set-locale C.UTF-8
 
-mkdir /etc/sddm.conf.d/
+mkdir --parents /etc/sddm.conf.d/
 cat << EOF > /etc/sddm.conf.d/live.conf
 [Autologin]
 User=live
@@ -60,7 +61,7 @@ Enabled=false
 EOF
 
 # Allow sudo in the live environment for troubleshooting
-mkdir -p /etc/sudoers.d
+mkdir --parents /etc/sudoers.d
 cat << EOF > /etc/sudoers.d/04_live
 %wheel ALL=(ALL:ALL) NOPASSWD: ALL
 EOF

mkosi.extra/usr/lib/systemd/system-generators/kde-linux-live-generator

@@ -17,29 +17,11 @@ if ! grep "kde-linux.live=1" /proc/cmdline; then
     exit 0
 fi
 
-if [ "$(readlink --canonicalize /dev/disk/by-label/KDELinuxLive)" != "$(readlink --canonicalize /dev/gpt-auto-root)" ]; then
+if [ "$(readlink --canonicalize /dev/disk/by-partlabel/KDELinuxLive)" != "$(readlink --canonicalize /dev/gpt-auto-root)" ]; then
     echo "gpt-auto-root is not KDELinuxLive"
     exit 0
 fi
 
-cat <<- EOF > "$normal_dir/system.mount"
-# Generated by $(basename "$0")
-[Unit]
-Description=Mount unit for /system
-
-[Mount]
-What=/dev/disk/by-label/KDELinuxLive
-Where=/system
-Type=btrfs
-Options=rw,subvol=/
-
-[Install]
-WantedBy=multi-user.target
-EOF
-
-mkdir "$normal_dir/multi-user.target.wants/" || true
-ln -sf ../system.mount "$normal_dir/multi-user.target.wants/system.mount"
-
 cat <<- EOF > "$normal_dir/var-lib-flatpak.mount"
 # Generated by $(basename "$0")
 [Unit]
@@ -47,10 +29,9 @@ Description=Mount unit for /var/lib/flatpak
 Before=kde-linux-volatile-var-lib-flatpak.service
 
 [Mount]
-What=/dev/disk/by-label/KDELinuxLive
+What=/usr/share/factory/var/lib/flatpak
 Where=/var/lib/flatpak
-Type=btrfs
-Options=rw,subvol=@flatpak
+Options=bind
 
 [Install]
 WantedBy=multi-user.target

mkosi.extra/usr/lib/systemd/system/kde-linux-live-setup.service

@@ -6,11 +6,11 @@ Description=KDE Linux Live Session Setup
 Requires=systemd-logind.service
 Before=display-manager.service
 After=systemd-logind.service systemd-homed.service
-ConditionPathExists=/system/@live/usr/bin/_kde-linux-live-setup
+ConditionPathExists=/live/usr/bin/_kde-linux-live-setup
 ConditionKernelCommandLine=kde-linux.live=1
 
 [Service]
-ExecStart=/system/@live/usr/bin/_kde-linux-live-setup
+ExecStart=/live/usr/bin/_kde-linux-live-setup
 ExecStartPost=/usr/bin/systemctl disable %n
 
 [Install]