feat: initial commit — void-installer multi-profile (stable-cinnamon + mainline-niri)

iso/patches/0001-cgroupv2-lazy-umount.patch

@@ -0,0 +1,38 @@
+--- a/lib.sh
++++ b/lib.sh
+@@ -103,12 +103,16 @@ umount_pseudofs() {
+     # deletable instead throwing the error "Device or Resource Busy".
+     # The '-f' option is passed to umount to account for the
+     # contingency where the psuedofs mounts are not present.
++    # On cgroupv2 hosts (e.g. Ubuntu/Mint) some submounts stay busy;
++    # fall back to lazy unmount so the build continues cleanly.
+     if [ -d "${ROOTFS}" ]; then
+         for f in dev proc sys; do
+-            umount -R -f "$ROOTFS/$f" >/dev/null 2>&1
++            umount -R -f "$ROOTFS/$f" >/dev/null 2>&1 || \
++                umount -R -l "$ROOTFS/$f" >/dev/null 2>&1 || true
+         done
+     fi
+-    umount -f "$ROOTFS/tmp" >/dev/null 2>&1
++    umount -f "$ROOTFS/tmp" >/dev/null 2>&1 || \
++        umount -l "$ROOTFS/tmp" >/dev/null 2>&1 || true
+ }
+ 
+ run_cmd_target() {
+--- a/mklive.sh
++++ b/mklive.sh
+@@ -55,10 +55,11 @@ mount_pseudofs() {
+ }
+ 
+ umount_pseudofs() {
++	# lazy unmount fallback for cgroupv2 hosts (Ubuntu/Mint)
+ 	for f in sys dev proc; do
+-		if [ -d "$ROOTFS/$f" ] && ! umount -R -f "$ROOTFS/$f"; then
+-			info_msg "ERROR: failed to unmount $ROOTFS/$f/"
+-			return 1
++		if [ -d "$ROOTFS/$f" ]; then
++			umount -R -f "$ROOTFS/$f" >/dev/null 2>&1 || \
++				umount -R -l "$ROOTFS/$f" >/dev/null 2>&1 || true
+ 		fi
+ 	done
+ }