#!/bin/sh

# Most content is adapted from the gentoo wiki/handbook.
# TODO:
# - make compilations --quiet

setvi() { \
    set -o vi
    loadkeys <<< "keycode 58 = Escape"
}

partitions() { \
    echo "mount you partitions with root on /mnt/gentoo"
}

tarball() { \
    cd /mnt/gentoo
    wget http://distfiles.gentoo.org/releases/amd64/autobuilds/20190417T214503Z/stage3-amd64-20190417T214503Z.tar.xz
    tar xpvf stage3-*.tar.bz2 --xattrs-include='*.*' --numeric-owner
}

croot() { \
    cp gentooinstaller.sh /mnt/gentoo #have access to this file after chrooting

    cp --dereference /etc/resolv.conf /mnt/gentoo/etc/
    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

    chroot /mnt/gentoo /bin/bash
    source /etc/profile
    export PS1="(chroot) ${PS1}"
}

portconf() { \
    emerge-webrsync
    eselect profile list # Make sure option below is current
    eselect profile set default/linux/amd64/17.0/desktop
    emerge --ask --verbose --update --deep --newuse @world

    echo 'USE="X alsa -gnome -systemd -qt -qt5 -gtk -pulseaudio\"' >> /etc/portage/make.conf

    procs=`expr $(nproc) - 1`
    echo 'MAKEOPTS="-j${procs}"'>> /etc/portage/make.conf

    #MAYBE THIS IS NOT COMMON_FLAGS but CFLAGS
    sed -i 's/COMMON_FLAGS=.*/COMMON_FLAGS="-O2 -pipe -march=native"/g' /etc/portage/make.conf
}

settime() { \
echo "US/Eastern" > /etc/timezone
emerge --config sys-libs/timezone-date

echo "en_US ISO-8859-1" >> /etc/locale.gen
echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen
locale-gen

echo 'LANG="en_US.UTF-8"' > /etc/env.d/02locale
echo 'LC_COLLATE="C"' >> /etc/env.d/02locale

env-update && source /etc/profile && export PS1="(chroot) $PS1"

echo "Kernel time!"
}

itools() { \
# System logger
emerge --ask app-admin/sysklogd
rc-update add sysklogd default
# Cron daemon
emerge --ask sys-process/cronie
rc-update add cronie default
# File indexing
emerge --ask sys-apps/mlocate
}

netmangen(){ \
# Install nm (maek sure use flags are set well)
emerge --ask net-mist/networkmanager

# Remove existing network management services
find /etc/runlevels/default -type l -name 'net.*' -exec sh -c 'for x; do rc-update del "${x##*/}" default; done' _ {} +
rc-update del dhcpcd default

# Start network manager (now and at boot)
rc-service NetworkManager start
rc-update add NetworkManager default
}

netmansetup() { \
echo "net-misc/networkmanager -modemanager -ofono -ppp -teamd" >> /etc/portage/package.use
netmangen
}

netmansetupnowifi() { \
echo "net-misc/networkmanager -modemanager -ofono -ppp -teamd -wext -wifi" >> /etc/portage/package.use
netmangen
}

bootloader() { \
echo "sys-boot/refind -* gnuefi ext4" >> /etc/portage/package.use
emerge --ask sys-boot/refind
}


PS3='Choose an option: '
options=("Test network" "Set vi mode" "Partition" "Download tarball" "Mount devices and chroot" "Configure portage" "Set time zones" "Install tools" "Network manager" "Network manager (no-wifi)" "Quit")
select opt in "${options[@]}"
do
    case $opt in
    "Test network") ping -c 1 www.gentoo.org ;;
        "Set vi mode") setvi ;;
    "Partions") partitions;;
        "Download tarball") tarball ;;
        "Mount devices and chroot") croot ;;
    "Configure portage") portconf ;;
    "Set time zone") settime ;;
    "Install tools") itools ;;
    "Network manager") itools ;;
    "Network manager (no-wifi)") itools ;;
        "Quit") break ;;
        *) echo "invalid option $REPLY";;
    esac
done