From 4a65f3b2e94b2a06d67b98197850f5f0c5d7202c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timoth=C3=A9e=20Ravier?= <tim@siosm.fr>
Date: Wed, 18 Dec 2024 12:29:35 +0100
Subject: [PATCH] migrate: Add systemd service unit to trigger on boot

Note that the service is intentionally not enabled by default as it
should be up to the distribution to add a systemd preset if the
migration to a static GRUB config is needed.

This will be used on Atomic Desktops & IoT systems to migrate systems to
a static GRUB config before enabling composefs as GRUB curently does not
interact well with it:
https://bugzilla.redhat.com/show_bug.cgi?id=2308594

See: https://github.com/coreos/bootupd/issues/789
See: https://fedoraproject.org/wiki/Changes/ComposefsAtomicDesktops
---
 Makefile                                        |  1 +
 .../bootupd-static-grub-migration.service       | 17 +++++++++++++++++
 contrib/packaging/bootupd.spec                  |  1 +
 3 files changed, 19 insertions(+)
 create mode 100644 contrib/packaging/bootupd-static-grub-migration.service

diff --git a/Makefile b/Makefile
index 59c212c9..f977008b 100644
--- a/Makefile
+++ b/Makefile
@@ -43,6 +43,7 @@ install-grub-static:
 
 install-systemd-unit:
 	install -m 644 -D -t "${DESTDIR}$(PREFIX)/lib/systemd/system/" contrib/packaging/bootloader-update.service
+	install -m 644 -D -t "${DESTDIR}$(PREFIX)/lib/systemd/system/" contrib/packaging/bootupd-static-grub-migration.service
 
 bin-archive:
 	rm target/inst -rf
diff --git a/contrib/packaging/bootupd-static-grub-migration.service b/contrib/packaging/bootupd-static-grub-migration.service
new file mode 100644
index 00000000..5f726f17
--- /dev/null
+++ b/contrib/packaging/bootupd-static-grub-migration.service
@@ -0,0 +1,17 @@
+[Unit]
+Description=bootupd static GRUB config migration
+Documentation=https://github.com/coreos/bootupd
+ConditionPathExists=!/boot/.bootupd-static-migration-complete
+RequiresMountsFor=/sysroot /boot
+# Only run after a successful bootloader update
+After=bootloader-update.service
+Requires=bootloader-update.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/bootupctl migrate
+RemainAfterExit=yes
+MountFlags=slave
+
+[Install]
+WantedBy=multi-user.target
diff --git a/contrib/packaging/bootupd.spec b/contrib/packaging/bootupd.spec
index b6db508f..6d096c15 100644
--- a/contrib/packaging/bootupd.spec
+++ b/contrib/packaging/bootupd.spec
@@ -36,6 +36,7 @@ BuildRequires: systemd-rpm-macros
 %{_libexecdir}/bootupd
 %{_prefix}/lib/bootupd/grub2-static/
 %{_unitdir}/bootloader-update.service
+%{_unitdir}/bootupd-static-grub-migration.service
 
 %prep
 %autosetup -n %{crate}-%{version} -p1 -Sgit