#!/bin/bash
set -e

source funcs.sh

#
# stage3 install
#

# sync time
ntpd -q -g || true

# download & unpack stage3 tarball
links https://www.gentoo.org/downloads/mirrors/
LINKS_RUNNING="true"
while [[ $LINKS_RUNNING == "true" ]]; do
  log_msg INFO "Waiting for user to quit links ..."
  LINKS_RUNNING=$(ps -aux | (grep -o '[l]inks') || true)
  sleep 5s
done
tar xpvf stage3-*.tar.xz --xattrs-include="*.*" --numeric-owner
rm stage3-*.tar.xz

# set USE flags for later
rm -rf /mnt/gentoo/etc/package.use
touch /mnt/gentoo/etc/package.use
cat package.use > /mnt/gentoo/etc/package.use

# configure portage (COMMON/USE)
cat make.conf > /mnt/gentoo/etc/make.conf

# make sure DNS works after chroot
cp --dereference /etc/resolv.conf /mnt/gentoo/etc/

# mount filesystems
mount --types proc /proc /mnt/gentoo/proc
mount --rbind /sys /mnt/gentoo/sys
mount --make-rslave /mnt/gentoo/sys
mount --rbind /dev /mnt/gentoo/dev
mount --make-rslave /mnt/gentoo/dev
mount --bind /run /mnt/gentoo/run
mount --make-slave /mnt/gentoo/run

# change root!
chroot /mnt/gentoo /bin/bash << EOF
set -e

source funcs.sh
source /etc/profile
export PS1="(chroot) ${PS1}"

  log_msg INFO "mount boot partition (EFI)" >> /var/log/installer.log
  mkdir -p /boot/efi
  mount ${CFG_BLOCK_PART}1 /boot/efi

log_msg INFO "synchronize gentoo ebuild repo" >> /var/log/installer.log
emerge --ask n --sync

# set some makeopts and default opts
# WARNING: THE DEFAULT USES ALL THE THREADS IN THE SYSTEM!
# IF YOU DO NOT WANT THIS PLEASE CHANGE IT TO WHAT GENTOO RECOMMENDS
# https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/Stage#MAKEOPTS
emerge --ask n cpuid2cpuflags
cpuid2cpuflags | sed 's/:\s/="/; s/$/"/' >> /etc/portage/make.conf
echo "EMERGE_DEFAULT_OPTS=\"--jobs=$(nproc) --load-average=$(nproc) --keep-going --verbose --quiet-build --with-bdeps=y --complete-graph=y --deep --ask\"" >> /etc/portage/make.conf 
echo "MAKEOPTS=\"-j$(nproc) -l$(nproc)\"" >> /etc/portage/make.conf

# install custom compiler for firefox
mkdir -p /etc/portage/env
curl -L https://gist.githubusercontent.com/emrakyz/23bf6fe9c30aa0b1eb88021889750ace/raw/832a0160ac0d0383c4f600da5cf8af4290019ff6/compiler-firefox -o /etc/portage/env/compiler-firefox
echo "www-client/firefox compiler-firefox" > /etc/portage/package.env

# TODO: select profile

log_msg INFO "update @world set (@system and @selected)" >> /var/log/installer.log
emerge --ask n --update --deep --newuse @world
emerge --ask n @preserved-rebuild
emerge --ask n --depclean

log_msg INFO "configure licenses" >> /var/log/installer.log
echo "ACCEPT_LICENSE=\"*\"" >> /etc/portage/make.conf

log_msg INFO "configure timezone (glibc)" >> /var/log/installer.log
echo ${CFG_TIMEZONE} > /etc/timezone
emerge --ask n --config sys-libs/timezone-data

log_msg INFO "configure locales (glibc)" >> /var/log/installer.log
echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen
locale-gen


log_msg INFO "reload environment" >> /var/log/installer.log
env-update && source /etc/profile && export PS1="(chroot) ${PS1}"

#
# firmware install
#

log_msg INFO "installing microcode and firmware" >> /var/log/installer.log
emerge --ask n intel-microcode
SIGNATURE=$(iucode_tool -S 2>&1 | grep -o "0.*$")
sed -i "s/MICROCODE_SIGNATURES=\"-S\"/MICROCODE_SIGNATURES=\"-s $SIGNATURE\"/" /etc/portage/make.conf
emerge --ask n intel-microcode
USE="-compress-xz" emerge --ask n linux-firmware
emerge --oneshot --ask n pciutils
GPU_CODE=$(lspci | grep -i 'vga\|3d\|2d' | awk -F'[[]' '{print $1}' | awk '{print $NF}' | tr '[:upper:]' '[:lower:]')
sed -i "/^nvidia\/\($GPU_CODE\)/!d" /etc/portage/savedconfig/sys-kernel/linux-firmware-*
USE="-harfbuzz" emerge --oneshot --ask n freetype
emerge --oneshot --ask n freetype

#
# kernel install
#

log_msg INFO "install kernel sources" >> /var/log/installer.log
emerge --ask n sys-kernel/gentoo-sources

log_msg INFO "select kernel sources" >> /var/log/installer.log
eselect kernel list
eselect kernel set 1

log_msg INFO "install genkernel" >> /var/log/installer.log
emerge --ask n sys-kernel/genkernel

log_msg INFO "set /boot/efi in fstab" >> /var/log/installer.log
echo "${CFG_BLOCK_PART}1 /boot/efi vfat defaults 0 2" >> /etc/fstab

if [[ "${CFG_LLVM}" == "y" ]]; then
  log_msg INFO "compile kernel sources (llvm)" >> /var/log/installer.log
  LLVM=1 LLVM_IAS=1 genkernel all \
    --kernel-as=llvm-as \
    --kernel-ar=llvm-ar \
    --kernel-cc=clang \
    --kernel-ld=ld.lld \
    --kernel-nm=llvm-nm \
    --utils-as=llvm-as \
    --utils-ar=llvm-ar \
    --utils-cc=clang \
    --utils-cxx=clang++ \
    --utils-ld=ld.lld \
    --utils-nm=llvm-nm
else
  log_msg INFO "compile kernel sources (gcc)" >> /var/log/installer.log
  genkernel all
fi

#
# filesystem install
#

log_msg INFO "set swap, / and cdrom in fstab" >> /var/log/installer.log
mkdir -p /mnt/cdrom
echo "${CFG_BLOCK_PART}"2 none swap sw 0 0 >> /etc/fstab
echo "${CFG_BLOCK_PART}"3 / ext4 noatime 0 1 >> /etc/fstab
echo /dev/cdrom /mnt/cdrom auto noauto,user 0 0 >> /etc/fstab

#
# networking install
#

log_msg INFO "set hostname" >> /var/log/installer.log
echo "hostname=\"${CFG_HOSTNAME}\"" > /etc/conf.d/hostname

log_msg INFO "install networkmanager" >> /var/log/installer.log
emerge --ask n --noreplace net-misc/networkmanager

log_msg INFO "install dhcpcd" >> /var/log/installer.log
emerge --ask n net-misc/dhcpcd

log_msg INFO "install wireless" >> /var/log/installer.log
emerge --ask n net-wireless/iw net-wireless/wpa_supplicant

log_msg INFO "configure networking" >> /var/log/installer.log


log_msg INFO "configure hosts" >> /var/log/installer.log
echo "127.0.0.1 ${CFG_HOSTNAME} localhost" >> /etc/hosts

#
# system install
#

log_msg INFO "set root password" >> /var/log/installer.log
echo "root:${CFG_ROOT_PASSWORD}" | chpasswd

log_msg INFO "set keymap" >> /var/log/installer.log
sed -i '/^keymap/s/=.*$/=$"'"fi"'"/' /etc/conf.d/keymaps
rc-update add keymaps boot
rc-service keymaps restart

log_msg INFO "install syslog" >> /var/log/installer.log
emerge --ask n app-admin/sysklogd
rc-update add sysklogd default

log_msg INFO "install crond" >> /var/log/installer.log
emerge --ask n sys-process/cronie
rc-update add cronie default

log_msg INFO "install file indexer" >> /var/log/installer.log
emerge --ask n sys-apps/mlocate

log_msg INFO "install filesystem tools" >> /var/log/installer.log
emerge --ask n sys-fs/e2fsprogs
emerge --ask n sys-fs/dosfstools

#
# bootloader install
#


log_msg INFO "install grub2 with efi" >> /var/log/installer.log
echo "GRUB_PLATFORMS=\"efi-64\"" >> /etc/portage/make.conf
emerge --ask n sys-boot/grub

log_msg INFO "install EFI bootloader" >> /var/log/installer.log
grub-install --target=x86_64-efi --efi-directory=/boot/efi

log_msg INFO "configure bootloader" >> /var/log/installer.log
grub-mkconfig -o /boot/grub/grub.cfg

EOF