Deploying a demo amd64 debian-based OS via ostree

This is a prototype outline for building and deploying a debian based OS
with ostree.  For purposes of demonstration, the OS runs from a bootable
USB device on a UEFI capable amd64 machine.  Once a USB device is
created and booted, the OS can be updated using a simple shell script.

<https://ostreedev.github.io/ostree/>
<https://www.nin.wiki/Halo_numbers>

24 files changed, 1256 insertions, 82 deletions

diff --git a/.gitignore b/.gitignore
index 75b7505..cfaf143 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 repo/
-rootfs/
+build-repo/
+roots/
 delta-update-file
+halo-*-usb-*
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
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+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..d024955
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,12 @@
+scripts := build-os commit-os publish-repo generate-usb-img sync-repo
+hooks := hooks/build-os/* hooks/build-os-post/*
+
+check: $(scripts)
+	shellcheck -x $(scripts)
+	shellcheck -x $(hooks)
+
+clean:
+	rm -rf build-repo halo-*-usb-*
+
+distclean: clean
+	rm -rf roots repo
diff --git a/README.md b/README.md
index 52266d8..3b63f19 100644
--- a/README.md
+++ b/README.md
@@ -1,16 +1,52 @@
 # ostree-demo
 
-roughing out a quick demo to try out ostree for deploying ubuntu
+## Intro
 
-# delta test - adding nethack
+This is a prototype outline for building and deploying a debian based OS with
+ostree.  For purposes of demonstration, the OS runs from a bootable USB device
+on a UEFI capable amd64 machine.  Once a USB device is created and booted, the
+OS can be updated using a simple shell script.
 
-    sudo ./make_rootfs.sh
-    sudo ./make_rootfs.sh with-app
 
-    sudo ./ostree_commit.sh rootfs/20250504.182708/
-    sudo ./ostree_commit.sh rootfs/20250504.183218/
+## Obtaining prebuilt usb images
 
-    sudo ./ostree_delta.sh rootfs^ rootfs
+Prebuilt usb device images are available here: <https://os.halo.nu/images/>
 
-    du -sh delta-update-file 
-    60K     delta-update-file
+A gpg signed checksum file is available to verify authenticity.
+
+Download the `.img.gz` and the `.img.bmap` file locally and use bmaptool to
+write to a usb device. e.g:
+
+    sudo bmaptool copy ./halo-01-usb-*.img /dev/sdX
+
+
+## Using the running system
+
+On first boot, the system should re-partition the usb device and grow the root
+filesystem for you.
+
+### Login
+
+Login as `root` with the password `guest`
+
+### Connect to the internet
+
+Use network manager on the cli to connect to the internet
+
+    nmtui
+
+### Update
+
+Check for and apply system updates from public ostree repo, hosted at
+<https://os.halo.nu/repo-dev/>:
+
+    # halo-upgrade
+
+
+## Building locally
+
+    $ sudo ./build-os          # build the os in a chroot, tweak it for ostree
+    $ sudo ./commit-os         # commit the root filesystem to an ostree build repo
+    $ ./publish-repo           # migrate the content to an archive repo
+    $ sudo ./generate-usb-img  # build a bootable usb image file
+    $ ./sync-repo              # sync the archive repo up to a webserver
diff --git a/build-os b/build-os
new file mode 100755
index 0000000..17f41bb
--- /dev/null
+++ b/build-os
@@ -0,0 +1,50 @@
+#!/bin/bash -xe
+
+set -o pipefail
+
+. config
+. sh-lib
+
+version=$( date +%Y%m%d.%H%M%S )
+
+# Check for dependencies:
+package_deps debootstrap
+
+function unmount_pseudo_filesystems(){
+	set +e
+	for dir in dev sys proc; do umount -v "$root"/"$dir"; done
+	set -e
+}
+
+function on_exit(){
+	set +e
+	unmount_pseudo_filesystems
+}
+trap on_exit EXIT
+
+root="${roots:?}"/"$version"
+
+mkdir -p "$root"
+
+# bootstrap the OS
+
+debootstrap "$codename" "$root"
+
+for dir in /proc /sys /dev; do
+	mount --bind "$dir" "$root"/"$dir"
+done
+
+export DEBIAN_FRONTEND=noninteractive
+export version
+export root
+export osname
+export osversion
+export osdesc
+export branch
+export remote
+
+run-parts --exit-on-error -- hooks/build-os
+
+unmount_pseudo_filesystems
+
+run-parts --exit-on-error -- hooks/build-os-post
diff --git a/commit-os b/commit-os
new file mode 100755
index 0000000..5e16a06
--- /dev/null
+++ b/commit-os
@@ -0,0 +1,18 @@
+#!/bin/bash -xe
+set -o pipefail
+
+. config
+
+version="$(find "$roots" -mindepth 1 -maxdepth 1 -type d | cut -d/ -f2 | sort -rn | head -1)"
+root="$roots"/"$version"
+
+if [ ! -d "$root" ]; then
+	echo "Error: root dir not found: $root" >&2
+	exit 1
+fi
+
+[ -d "$build_repo" ] && rm -rf "$build_repo"
+
+ostree --repo="$build_repo" init --mode=archive
+
+ostree --repo="$build_repo" commit -b "$branch" --tree=dir="$root"
diff --git a/config b/config
new file mode 100644
index 0000000..ca263c7
--- /dev/null
+++ b/config
@@ -0,0 +1,18 @@
+osname=halo
+osversion=01
+osdesc="Down In It"
+codename=trixie
+
+branch="$osname"/"$osversion"/x86_64/buildmain/standard
+
+# local dirs
+roots=roots
+build_repo=build-repo
+repo=repo
+
+# remote
+remote=repo-dev
+remote_url="https://os.halo.nu/$remote"
+
+# publish-repo
+publish_remote_repo="ph1l@os.halo.nu:/var/www/os.halo.nu/$remote"
diff --git a/generate-usb-img b/generate-usb-img
new file mode 100755
index 0000000..68cf2f7
--- /dev/null
+++ b/generate-usb-img
@@ -0,0 +1,96 @@
+#!/bin/bash -xe
+
+set -o pipefail
+
+. ./config
+. ./sh-lib
+
+sysroot=/tmp/$$.ostree_usb
+
+version=$(date +%Y%m%d.%H%M%S)
+image="./$osname-$osversion-usb-$version.img"
+seek_sectors=$(( (8 *1024 *1024 *2) +33 -1 ))
+
+# Check for dependencies:
+package_deps dosfstools ostree parted udev
+
+[ -f "$image" ] && rm "$image"
+
+dd if=/dev/zero of="$image" seek="$seek_sectors" count=1 bs=512
+loopdev=$(losetup -f --show "$image")
+
+function cleanup(){
+	set +e
+	if [ -n "$deployroot" ]; then
+		for p in /proc /sys /dev /image /boot/efi /boot /sysroot; do
+			umount "$deployroot""$p"
+		done
+		if [ -f "$deployroot"/image ]; then
+			chattr -i "$deployroot"
+			rm -f "$deployroot"/image
+			chattr +i "$deployroot"
+		fi
+	fi
+	for p in /boot/efi /; do
+		umount "$sysroot""$p"
+	done
+	rmdir "$sysroot"
+	partx -d "$loopdev"p1
+	partx -d "$loopdev"p2
+	losetup -d "$loopdev"
+}
+trap cleanup EXIT
+
+parted -a optimal -s "$loopdev" -- \
+	mklabel gpt unit MiB \
+	mkpart ESP fat32 1 17 \
+	mkpart root ext4 17 8192 \
+	set 1 boot on \
+	print
+
+partx -a "$loopdev" || /bin/true
+mkfs.vfat -n ESP "$loopdev"p1
+mkfs.ext4 -L root "$loopdev"p2
+rootuuid=$(blkid -s UUID -o value "$loopdev"p2)
+mkdir -p "$sysroot"
+mount "$loopdev"p2 "$sysroot"
+mkdir -p "$sysroot"/boot/efi
+mount "$loopdev"p1 "$sysroot"/boot/efi
+
+ostree admin init-fs "$sysroot"
+ostree admin --sysroot="$sysroot" os-init "$osname"
+
+ostree --repo="$sysroot"/ostree/repo remote add --gpg-import=key.asc "$remote" "$remote_url" "$branch"
+ostree --repo="$sysroot"/ostree/repo pull-local --remote="$remote" "$repo" "$branch"
+
+ostree --repo="$sysroot"/ostree/repo config set sysroot.bootprefix true
+ostree admin --sysroot="$sysroot" deploy --os="$osname" --karg=root=UUID="$rootuuid" --karg=rw "$remote":"$branch"
+
+current_deployment=$(ostree admin --sysroot="$sysroot" status | awk '{print $2}' | head -1)
+deployroot="$sysroot"/ostree/deploy/"$osname"/deploy/"$current_deployment"
+
+chattr -i "$deployroot"
+touch "$deployroot"/image
+chattr +i "$deployroot"
+
+mount --bind "$image" "$deployroot"/image
+mount --bind "$sysroot"/boot "$deployroot"/boot
+mount --bind "$sysroot"/boot/efi "$deployroot"/boot/efi
+
+for p in /proc /sys /dev; do
+	mount --bind "$p" "$deployroot""$p"
+done
+
+chroot "$deployroot" /usr/sbin/grub-install --target='x86_64-efi' \
+	--efi-directory=/boot/efi --boot-directory=/boot \
+	--bootloader-id=GRUB --removable "$image"
+
+mount --bind "$sysroot" "$deployroot"/sysroot
+chroot "$deployroot" grub-mkconfig -o /boot/grub/grub.cfg
+
+trap - EXIT
+cleanup
+
+bmaptool create "$image" > "$image".bmap
+xz "$image"
+sha256sum "$image".xz > "$image".sha256sum
diff --git a/hooks/build-os-post/20-ostree-kernel-mangle b/hooks/build-os-post/20-ostree-kernel-mangle
new file mode 100755
index 0000000..1e51905
--- /dev/null
+++ b/hooks/build-os-post/20-ostree-kernel-mangle
@@ -0,0 +1,22 @@
+#!/bin/bash -xe
+set -o pipefail
+
+# Kernel mangling
+
+kver=$(ls -1 "${root:?}"/usr/lib/modules)
+
+# move kernel out of /boot into /usr/lib/modules/
+mv "${root:?}"/boot/vmlinuz-"$kver" "${root:?}"/usr/lib/modules/"$kver"/vmlinuz
+mv "${root:?}"/boot/initrd.img-"$kver" "${root:?}"/usr/lib/modules/"$kver"/initramfs.img
+mv "${root:?}"/boot/config-"$kver" "${root:?}"/usr/lib/modules/"$kver"/config
+mv "${root:?}"/boot/System.map-"$kver" "${root:?}"/usr/lib/modules/"$kver"/System.map
+
+# remove kernel symlinks from root
+rm "${root:?}"/vmlinuz* "${root:?}"/initrd.*
+
+khash=$(sha256sum "${root:?}"/usr/lib/modules/"$kver"/vmlinuz | awk '{print $1}')
+
+# add ostree style kernel links from /usr/lib/ostree-boot
+mkdir -p "${root:?}"/usr/lib/ostree-boot
+ln -s /usr/lib/modules/"$kver"/vmlinuz "${root:?}"/usr/lib/ostree-boot/vmlinuz-"$khash"
+ln -s /usr/lib/modules/"$kver"/initramfs.img "${root:?}"/usr/lib/ostree-boot/initramfs-"$khash"
diff --git a/hooks/build-os-post/40-ostree-demo-scripts b/hooks/build-os-post/40-ostree-demo-scripts
new file mode 100755
index 0000000..6ea5627
--- /dev/null
+++ b/hooks/build-os-post/40-ostree-demo-scripts
@@ -0,0 +1,36 @@
+#!/bin/bash -xe
+
+set -o pipefail
+
+cat > "${root:?}"/usr/sbin/halo-upgrade << EOF
+#!/bin/bash -e
+
+set -o pipefail
+
+remote="${remote:?}"
+branch="${branch:?}"
+
+remote_ref=\$(ostree remote refs -r "\$remote" | egrep ^"\$remote":"\$branch"'\\s' | awk '{print \$2}')
+local_ref=\$(ostree refs -r | egrep ^"\$remote":"\$branch"'\\s' | awk '{print \$2}')
+
+if [ "\$local_ref" != "\$remote_ref" -a -n "\$remote_ref" ]; then
+	echo "OS Update available. Installing..."
+
+	set -x
+
+	ostree admin upgrade
+
+	grub-mkconfig -o /boot/grub/grub.cfg
+
+	set +x
+
+	echo "OS Update Installed. Press Enter to Reboot..."
+
+	read
+
+	reboot
+else
+	echo "No OS Update found."
+fi
+EOF
+chmod 755 "${root:?}"/usr/sbin/halo-upgrade
diff --git a/hooks/build-os-post/90-ostree-path-mangles b/hooks/build-os-post/90-ostree-path-mangles
new file mode 100755
index 0000000..b2709f3
--- /dev/null
+++ b/hooks/build-os-post/90-ostree-path-mangles
@@ -0,0 +1,47 @@
+#!/bin/bash -xe
+set -o pipefail
+
+# remove everything from dev and var
+rm -rf "${root:?}"/dev/* "${root:?}"/var/*
+
+# add sysroot mountpoint and ostree link to root
+mkdir -p "${root:?}"/sysroot
+ln -s /sysroot/ostree "${root:?}"/ostree
+
+# add tmpfiles config to create expected directory structure
+cat > "${root:?}"/etc/tmpfiles.d/var.conf << EOF
+d /var/log/journal 0755 root root -
+L /var/home - - - - ../sysroot/home
+d /var/opt 0755 root root -
+d /var/srv 0755 root root -
+d /var/roothome 0700 root root -
+d /var/usrlocal 0755 root root -
+d /var/usrlocal/bin 0755 root root -
+d /var/usrlocal/etc 0755 root root -
+d /var/usrlocal/games 0755 root root -
+d /var/usrlocal/include 0755 root root -
+d /var/usrlocal/lib 0755 root root -
+d /var/usrlocal/man 0755 root root -
+d /var/usrlocal/sbin 0755 root root -
+d /var/usrlocal/share 0755 root root -
+d /var/usrlocal/src 0755 root root -
+d /var/mnt 0755 root root -
+d /run/media 0755 root root -
+d /var/games 0755 root root -
+EOF
+
+# move /etc to /usr/etc
+mv "${root:?}"/etc "${root:?}"/usr/etc
+mkdir "${root:?}"/etc # do we need this?
+
+# link persistent directories to /var
+for dir in home opt srv mnt tmp; do
+	rmdir "${root:?}"/"$dir"
+	ln -s /var/"$dir" "${root:?}"/"$dir"
+done
+
+rm -rf "${root:?}"/root
+ln -s /var/roothome "${root:?}"/root
+
+rm -rf "${root:?}"/usr/local
+ln -s /var/usrlocal "${root:?}"/usr/local
diff --git a/hooks/build-os/10-apt b/hooks/build-os/10-apt
new file mode 100755
index 0000000..65c7056
--- /dev/null
+++ b/hooks/build-os/10-apt
@@ -0,0 +1,15 @@
+#!/bin/bash -xe
+set -o pipefail
+
+# Enable additional sources
+cat > "${root:?}"/etc/apt/sources.list << EOF
+deb https://deb.debian.org/debian trixie main contrib non-free non-free-firmware
+
+deb https://deb.debian.org/debian trixie-updates main contrib non-free non-free-firmware
+
+deb https://security.debian.org/debian-security trixie-security main contrib non-free non-free-firmware
+EOF
+
+# update/upgrade system
+chroot "${root:?}" apt-get update
+chroot "${root:?}" apt-get upgrade
diff --git a/hooks/build-os/20-kernel-boot b/hooks/build-os/20-kernel-boot
new file mode 100755
index 0000000..8aca938
--- /dev/null
+++ b/hooks/build-os/20-kernel-boot
@@ -0,0 +1,5 @@
+#!/bin/bash -xe
+set -o pipefail
+
+chroot "${root:?}" apt-get --assume-yes install firmware-linux grub-efi-amd64 \
+	linux-image-amd64 ostree-boot
diff --git a/hooks/build-os/50-network b/hooks/build-os/50-network
new file mode 100755
index 0000000..c2cb6ee
--- /dev/null
+++ b/hooks/build-os/50-network
@@ -0,0 +1,16 @@
+#!/bin/bash -xe
+set -o pipefail
+
+# Append motd
+
+cat >> "${root:?}"/etc/motd << EOF
+
+${osname:?}/${osversion:?} (${osdesc:?}) v${version:?}
+EOF
+
+# Set hostname
+echo "${osname:?}-${osversion:?}" > "${root:?}"/etc/hostname
+echo "127.0.1.1 ${osname:?}-${osversion:?}" >> "${root:?}"/etc/hosts
+
+# Install network manager
+chroot "${root:?}" apt-get install -y network-manager
diff --git a/hooks/build-os/70-system-config b/hooks/build-os/70-system-config
new file mode 100755
index 0000000..0fc5bde
--- /dev/null
+++ b/hooks/build-os/70-system-config
@@ -0,0 +1,10 @@
+#!/bin/bash -xe
+set -o pipefail
+
+# Set a root password
+echo "root:guest" | chroot "${root:?}" chpasswd
+
+# Make console quieter
+cat > "${root:?}"/etc/sysctl.d/printk.conf << EOF
+kernel.printk = 3	4	1	3
+EOF
diff --git a/hooks/build-os/80-firstboot-repart-growfs b/hooks/build-os/80-firstboot-repart-growfs
new file mode 100755
index 0000000..78648cc
--- /dev/null
+++ b/hooks/build-os/80-firstboot-repart-growfs
@@ -0,0 +1,47 @@
+#!/bin/bash -xe
+
+set -o pipefail
+
+# Configure systemd-growfs-root
+mkdir "${root:?}"/etc/systemd/system/systemd-growfs-root.service.d
+
+cat > "${root:?}"/etc/systemd/system/systemd-growfs-root.service.d/override.conf << EOF
+[Unit]
+ConditionFirstBoot=yes
+
+[Service]
+ExecStart=/usr/lib/systemd/systemd-growfs /sysroot
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+chroot "${root:?}" systemctl enable systemd-growfs-root.service
+
+# Configure systemd-repart
+
+mkdir "${root:?}"/etc/repart.d
+
+cat > "${root:?}"/etc/repart.d/50-root.conf << EOF
+[Partition]
+Type=linux-generic
+GrowFileSystem=yes
+EOF
+
+chroot "${root:?}" apt-get install -y systemd-repart
+
+# Configure systemd-firstboot
+
+mkdir "${root:?}"/etc/systemd/system/systemd-firstboot.service.d
+cat > "${root:?}"/etc/systemd/system/systemd-firstboot.service.d/install.conf << EOF
+[Service]
+ExecStart=
+ExecStart=/usr/bin/systemd-firstboot --prompt
+
+[Install]
+WantedBy=sysinit.target
+EOF
+
+chroot "${root:?}" systemctl enable systemd-firstboot.service
+
+rm "${root:?}"/etc/{machine-id,localtime}
diff --git a/hooks/build-os/90-cleanup b/hooks/build-os/90-cleanup
new file mode 100755
index 0000000..d0b7b6f
--- /dev/null
+++ b/hooks/build-os/90-cleanup
@@ -0,0 +1,4 @@
+#!/bin/bash -xe
+set -o pipefail
+
+chroot "${root:?}" apt-get clean
diff --git a/key.asc b/key.asc
new file mode 100644
index 0000000..986b452
--- /dev/null
+++ b/key.asc
@@ -0,0 +1,96 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mQINBFZd9fcBEADQvfxoz4f/UJBhKnQV1W3ouv/4olejQ+6r1ZTUS1aZ6jWrjEHX
+vXyQNQy1pZIg2mdw09PEjZY12J4vxYMPPORbZl1HWbEj06dzh8YUNhLPK2YaLpey
+++oZ0WjwRCEgzTD1zLgZyUNliPMnyIgHWBcnnAt2rQ3/8vmc+XFWITh7bRGvIu1A
+jwshuIkHl29eiopCOVSwNLagH2XeSgjkvDINdCuyafmHsb+sRt6HmyErvZWZr0Q5
+/EhHdIYiWfkYvl9BRvMZW1j6Zsfp9Ebkr6KWjMGlwVl25QzZRPF9kvpPZkh06mh/
+q++TbTeAhcvsnzqbyw41DQAFBhYliqbq9w/dCPE+UIkiJ/LITo69fRoQQ8oHyCif
+3pj8Pq6nfDxBHedWsZbLxBM1eJ07KT3AeB3pUOCV7eBMQFSuQUfS6gf8drZ0UrtX
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+=HhNo
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/make_rootfs.sh b/make_rootfs.sh
deleted file mode 100755
index 811c5cb..0000000
--- a/make_rootfs.sh
+++ /dev/null
@@ -1,57 +0,0 @@
-#!/bin/bash -xe
-
-IMAGE_VERSION=$( date +%Y%m%d.%H%M%S )
-
-function unmount_pseudo_filesystems(){
-	set +e
-	for dir in dev sys proc; do umount -v "$root"/"$dir"; done
-	set -e
-}
-
-function on_exit(){
-	set +e
-	unmount_pseudo_filesystems
-	umount -v "$root"
-}
-trap on_exit EXIT
-
-root=rootfs/"$IMAGE_VERSION"
-
-mkdir -p "$root"
-
-# bootstrap the OS
-
-debootstrap noble "$root"
-
-for dir in /proc /sys /dev; do
-	mount --bind "$dir" "$root"/"$dir"
-done
-
-export DEBIAN_FRONTEND=noninteractive
-
-chroot "$root" locale-gen en_US.UTF-8
-
-chroot "$root" apt-get update
-
-# Install a kernel and bootloader
-
-chroot "$root" apt-get -y --no-install-recommends install linux-generic-hwe-24.04 grub-efi
-
-if [ "$1" == "with-app" ]; then
-	# Install an application
-	chroot "$root" apt-get update
-	chroot "$root" apt-get install -y software-properties-common
-	chroot "$root" add-apt-repository -y universe
-	chroot "$root" apt-get update
-	chroot "$root" apt-get -y install nethack-console
-fi
-
-
-# Cleanup
-
-chroot "$root" apt-get clean
-
-unmount_pseudo_filesystems
-
-rm -rf "$root"/dev/*
-rm -rf "$root"/var/lib/apt/lists/*
diff --git a/ostree_commit.sh b/ostree_commit.sh
deleted file mode 100755
index 23a04e0..0000000
--- a/ostree_commit.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/bash -xe
-
-ROOTFS_DIR=$1
-
-[ ! -d repo ] && \
-	ostree --repo=repo init
-
-ostree --repo=repo commit --branch=rootfs "$ROOTFS_DIR"
diff --git a/ostree_delta.sh b/ostree_delta.sh
deleted file mode 100755
index 2a23b56..0000000
--- a/ostree_delta.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/bash -xe
-
-FROM_REF=$1
-TO_REF=$2
-
-ostree --repo=repo static-delta generate --min-fallback-size=0 \
-	--filename=delta-update-file --from="$FROM_REF" "$TO_REF"
diff --git a/publish-repo b/publish-repo
new file mode 100755
index 0000000..d4ece7c
--- /dev/null
+++ b/publish-repo
@@ -0,0 +1,23 @@
+#!/bin/bash -xe
+
+set -o pipefail
+
+. config
+
+version="$(find "$roots" -mindepth 1 -maxdepth 1 -type d | cut -d/ -f2 | sort -rn | head -1)"
+
+[ ! -d "$repo" ] && ostree --repo="$repo" init --mode=archive
+
+REF=$(ostree --repo="$build_repo" rev-parse "$branch")
+
+ostree --repo="$repo" pull-local "$build_repo" "$REF"
+
+ostree --repo="$repo" commit -b "$branch" \
+	-s "$osname/$osversion:($osdesc) $branch $version" \
+	--add-metadata-string=version="$branch":"$version" \
+	--gpg-sign=CE4A0BF21E1C237DD8C400FAA39487B22697143F \
+	--tree=ref="$REF"
+
+ostree --repo="$repo" static-delta generate "$branch" || echo "Warning: static-delta generate failed" >&2
+
+ostree --repo="$repo" summary -u
diff --git a/sh-lib b/sh-lib
new file mode 100644
index 0000000..97571c2
--- /dev/null
+++ b/sh-lib
@@ -0,0 +1,12 @@
+function package_deps(){
+	pkgs=
+	for pkg in $@; do
+		if ! dpkg -l $pkg 2>&1 >/dev/null; then
+			pkgs="$pkgs $pkg"
+		fi
+	done
+	if [ "$pkgs" != "" ]; then
+                apt-get update
+		apt-get --no-install-recommends install $pkgs
+	fi
+}
diff --git a/sync-repo b/sync-repo
new file mode 100755
index 0000000..f218337
--- /dev/null
+++ b/sync-repo
@@ -0,0 +1,7 @@
+#!/bin/bash -xe
+
+set -o pipefail
+
+. config
+
+rsync -av --delete-after "$repo"/ "$publish_remote_repo"/