From 34105077c777b0d2c5c69f39921f376b84ce1443 Mon Sep 17 00:00:00 2001
From: Philip J Freeman <elektron@halo.nu>
Date: Sat, 31 May 2025 12:34:14 -0700
Subject: 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>
---
 hooks/build-os-post/90-ostree-path-mangles | 47 ++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100755 hooks/build-os-post/90-ostree-path-mangles

(limited to 'hooks/build-os-post/90-ostree-path-mangles')

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
-- 
cgit v1.2.3