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#!/bin/bash
# Misc "tweaks" done after bootstrapping
function pre() {
# Remove machine-id see:
# https://gitlab.archlinux.org/archlinux/arch-boxes/-/issues/25
# https://gitlab.archlinux.org/archlinux/arch-boxes/-/issues/117
rm "${MOUNT}/etc/machine-id"
# ESP mountpoint
printf 'UUID=%s /efi vfat noauto,x-systemd.automount,x-systemd.idle-timeout=300,rw,relatime,fmask=0133,dmask=0022,utf8 0 2\n' "$(blkid -s UUID -o value "${LOOPDEV}p2")" >>"${MOUNT}/etc/fstab"
# Swap
arch-chroot "${MOUNT}" /usr/bin/btrfs subvolume create /swap
chattr +C "${MOUNT}/swap"
chmod 0700 "${MOUNT}/swap"
arch-chroot "${MOUNT}" /usr/bin/btrfs filesystem mkswapfile --size 512m --uuid clear /swap/swapfile
echo -e "/swap/swapfile none swap defaults 0 0" >>"${MOUNT}/etc/fstab"
arch-chroot "${MOUNT}" /usr/bin/systemd-firstboot --locale=C.UTF-8 --timezone=UTC --hostname=archlinux --keymap=us
ln -sf /run/systemd/resolve/stub-resolv.conf "${MOUNT}/etc/resolv.conf"
# Setup pacman-init.service for clean pacman keyring initialization
cat <<EOF >"${MOUNT}/etc/systemd/system/pacman-init.service"
[Unit]
Description=Initializes Pacman keyring
Before=sshd.service cloud-final.service archlinux-keyring-wkd-sync.service
After=time-sync.target
ConditionFirstBoot=yes
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/bin/pacman-key --init
ExecStart=/usr/bin/pacman-key --populate
[Install]
WantedBy=multi-user.target
EOF
# Setup mirror list to Geo IP mirrors
cat <<EOF >"${MOUNT}/etc/pacman.d/mirrorlist"
Server = https://geo.mirror.pkgbuild.com/\$repo/os/\$arch
Server = https://mirror.rackspace.com/archlinux/\$repo/os/\$arch
Server = https://mirror.leaseweb.net/archlinux/\$repo/os/\$arch
EOF
# enabling important services
arch-chroot "${MOUNT}" /bin/bash -e <<EOF
source /etc/profile
systemctl enable sshd
systemctl enable systemd-networkd
systemctl enable systemd-resolved
systemctl enable systemd-timesyncd
systemctl enable systemd-time-wait-sync
systemctl enable pacman-init.service
EOF
# GRUB
arch-chroot "${MOUNT}" /usr/bin/grub-install --target=i386-pc "${LOOPDEV}"
arch-chroot "${MOUNT}" /usr/bin/grub-install --target=x86_64-efi --efi-directory=/efi --removable
sed -i 's/^GRUB_TIMEOUT=.*$/GRUB_TIMEOUT=1/' "${MOUNT}/etc/default/grub"
# setup unpredictable kernel names
sed -i 's/^GRUB_CMDLINE_LINUX=.*$/GRUB_CMDLINE_LINUX="net.ifnames=0"/' "${MOUNT}/etc/default/grub"
sed -i 's/^GRUB_CMDLINE_LINUX_DEFAULT=.*/GRUB_CMDLINE_LINUX_DEFAULT=\"rootflags=compress-force=zstd\"/' "${MOUNT}/etc/default/grub"
arch-chroot "${MOUNT}" /usr/bin/grub-mkconfig -o /boot/grub/grub.cfg
}
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