genimg.sh

#!/bin/sh -eux
# Adapted from builds.sr.ht, AGPL license at the end of the file
root=root
arch=x86_64

cleanup() {
    # The order here is important if you don't want to hose your mounts
    umount -lRf "$root"/var/cache/pacman/pkg || true
    umount -lRf "$root"/run || true
    umount -lRf "$root"/boot || true
    umount -lRf "$root" || true
    umount -Rf "$root" || true
    qemu-nbd --disconnect /dev/nbd0 || true
    rmdir root || true
}

mkdir -p "$arch"

qemu-img create -f qcow2 $arch/root.img.qcow2 5G
modprobe nbd
qemu-nbd --connect=/dev/nbd0 $arch/root.img.qcow2
trap cleanup EXIT

dd if=/usr/lib/syslinux/bios/mbr.bin of=/dev/nbd0 bs=1 count=440

sfdisk --no-reread /dev/nbd0 << EOF
1M,100M,L,*
,,L
EOF

mkdir -p "$root"
mkfs.ext4 /dev/nbd0p1
mkfs.ext4 /dev/nbd0p2
mount /dev/nbd0p2 "$root"
mkdir -p "$root"/boot
mount /dev/nbd0p1 "$root"/boot

pacstrap -c root base mkinitcpio linux syslinux openssh sudo git make which coq gcc ocamlbuild ocaml-findlib python iverilog riscv32-elf-binutils vim emacs-nox

run_root() {
    local cmd="$@"
    chroot $root /bin/bash -c "$cmd"
}

echo 'nameserver 8.8.8.8' >$root/etc/resolv.conf
echo 'nameserver 8.8.4.4' >>$root/etc/resolv.conf
echo '127.0.0.1 localhost.localdomain localhost' > $root/etc/hosts
echo '::1 localhost.localdomain localhost' >> $root/etc/hosts

mount --bind /proc $root/proc
mount --bind /sys $root/sys
mount --bind /dev $root/dev
mount --bind /dev/pts $root/dev/pts
mount --bind /dev/shm $root/dev/shm
mount --bind /run $root/run
mount --bind /var/cache/pacman/pkg $root/var/cache/pacman/pkg

extlinux -i "$root"/boot

root_uuid="$(run_root findmnt -f / -n -o UUID)"

cat > "$root"/boot/extlinux.conf << EOF
default archlinux
label archlinux
linux vmlinuz-linux
initrd initramfs-linux.img
append root=UUID=${root_uuid} rw quiet
EOF

genfstab -U "$root" >> "$root"/etc/fstab
#cat >> "$root"/etc/fstab << EOF
#/dev/vda1 /boot ext4 rw,relatime,data=ordered 0 0
#/dev/vda2 / ext4 rw,relatime,data=ordered 0 0
#EOF

cp mkinitcpio.conf $root/etc
cp pacman.conf $root/etc

run_root mkinitcpio -p linux

mkdir -p $root/etc/pacman.d/hooks/
ln -s /dev/null $root/etc/pacman.d/hooks/90-linux.hook

sed -i 's/#en_US.UTF-8/en_US.UTF-8/' $root/etc/locale.gen
run_root locale-gen

cat >"$root"/etc/systemd/network/25-dhcp.network <<EOF
[Match]
Name=*

[Network]
DHCP=yes
#Address=10.0.2.15/24
#Gateway=10.0.2.2
EOF

sed -e 's/#PermitEmptyPasswords no/PermitEmptyPasswords yes/' -i $root/etc/ssh/sshd_config
run_root systemctl enable sshd

run_root systemctl enable systemd-networkd.service
# run_root systemctl enable systemd-timesyncd.service

run_root groupadd sudo
run_root useradd -mG sudo,kvm artifact
run_root passwd -d artifact
run_root passwd -d root
echo '%sudo ALL=(ALL) NOPASSWD: ALL' >> $root/etc/sudoers

# from AUR, nextpnr-headless-ecp5-git is a stripped variant of nextpnr-git
run_root pacman --noconfirm -U /var/cache/pacman/pkg/bluespec-git-r424.88d4eef-167-x86_64.pkg.tar.zst /var/cache/pacman/pkg/trellis-git-r992.210a0a7-1-x86_64.pkg.tar.zst /var/cache/pacman/pkg/nextpnr-ecp5-headless-git-r3205.1aab019f-1-x86_64.pkg.tar.zst /var/cache/pacman/pkg/yosys-git-0.9+3981.r10628.375af199e-1-x86_64.pkg.tar.zst

git clone https://github.com/let-def/vimbufsync.git 	$root/home/artifact/.vim/pack/coq/start/vimbufsync
git clone https://github.com/whonore/coqtail.git 	$root/home/artifact/.vim/pack/coq/start/coqtail
git clone https://github.com/ProofGeneral/PG 		$root/home/artifact/.emacs.d/lisp/PG
cat > $root/home/artifact/.emacs << 'EOF'
;; Open .v files with Proof General's Coq mode
(load "~/.emacs.d/lisp/PG/generic/proof-site")
(setq proof-splash-enable nil)
EOF

# cp -ar /home/fiat/plv/bedrock2-lightbulb_artifact $root/home/artifact/bedrock2
git clone --recursive https://github.com/mit-plv/bedrock2 --branch=lightbulb_artifact $root/home/artifact/bedrock2

run_root chown -R artifact:artifact /home/artifact

run_root su artifact -c sh << 'EOF'
make -C /home/artifact/.emacs.d/lisp/PG || true
EOF

sync

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findmnt -f / -o PARTUUID -n
root=PARTUUID=98a81274-10f7-40db-872a-03df048df366 https://wiki.archlinux.org/index.php/Persistent_block_device_naming#by-partuuid
PARTUUID=98a81274-10f7-40db-872a-03df048df366 / ext4 defaults 0 1 https://wiki.archlinux.org/index.php/Fstab#GPT_partition_UUIDs