arch-iso-chainload-with-grub

commit 779af28a709bf88ac642617a6bc913f671e07139
Author: Jordan Beaver <jordan@beaveris.me>
Date:   Thu, 22 Aug 2024 18:42:31 -0700

script with service file and timer to download arch iso and maintain two
copies in /boot/isos.

Includes systemd-boot entry config to chainload grub, and grub config
file which requires username and password to boot the current or last
month iso.

Diffstat:
A
arch-iso-downloader
 | 
16
++++++++++++++++
A
arch-iso-downloader.service
 | 
6
++++++
A
arch-iso-downloader.timer
 | 
10
++++++++++
A
grub.cfg
 | 
25
+++++++++++++++++++++++++
A
grub.conf
 | 
2
++

5 files changed, 59 insertions(+), 0 deletions(-)
diff --git a/arch-iso-downloader b/arch-iso-downloader
@@ -0,0 +1,16 @@
+#!/bin/bash
+magnet=$(curl -sLo /dev/stdout 'https://archlinux.org/download/' | htmlq 'a[title="Magnet link"]' -a 'href')
+tracker="udp://tracker.opentrackr.org:1337/announce"
+location="/tmp"
+filename="archlinux-x86_64.iso"
+isos="/boot/isos"
+
+if aria2c "$magnet" --bt-tracker "$tracker" --seed-time=0 -d "$location" -O 1="$filename"
+then
+	cp "$isos/$filename" "$isos/last-$filename" 
+	mv "$location/$filename" "$isos/$filename"
+	logger "Arch monthly iso downloaded successfully"
+else
+	logger "Arch monthly iso download FAILED!"
+	exit 1
+fi
diff --git a/arch-iso-downloader.service b/arch-iso-downloader.service
@@ -0,0 +1,6 @@
+[Unit]
+Description=Downloading latest installer iso for recovery purposes
+
+[Service]
+Type=oneshot
+ExecStart=arch-iso-downloader
diff --git a/arch-iso-downloader.timer b/arch-iso-downloader.timer
@@ -0,0 +1,10 @@
+[Unit]
+Description=Downloading latest installer iso for recovery purposes
+Requires=network-online.target
+
+[Timer]
+OnCalendar=*-*-10 *:*:*
+Persistent=true
+
+[Install]
+WantedBy=timers.target
diff --git a/grub.cfg b/grub.cfg
@@ -0,0 +1,25 @@
+timeout=0
+insmod part_gpt
+insmod part_msdos
+set superusers="<user>"
+password_pbkdf2 <user> <output of grub-mkpasswd-pbkdf2>
+
+menuentry '[loopback]archlinux-x86_64.iso' {
+	set iso_path='/isos/archlinux-x86_64.iso'
+	export iso_path
+	search --set=root --file "$iso_path"
+	loopback loop "$iso_path"
+	root=(loop)
+	configfile /boot/grub/loopback.cfg
+	loopback --delete loop
+}
+
+menuentry '[loopback]last-archlinux-x86_64.iso' {
+	set iso_path='/isos/last-archlinux-x86_64.iso'
+	export iso_path
+	search --set=root --file "$iso_path"
+	loopback loop "$iso_path"
+	root=(loop)
+	configfile /boot/grub/loopback.cfg
+	loopback --delete loop
+}
diff --git a/grub.conf b/grub.conf
@@ -0,0 +1,2 @@
+title ARCHISO
+efi /EFI/GRUB/grubx64.efi