#!/bin/sh
set -e

: ${target_dev='sda'}
: ${target_iso='/home/liveuser/Downloads/Win10_1809Oct_English_x64.iso'}

: ${exfat_dependencies='exfat-utils fuse-exfat'}

: ${bios_dst='/usr/lib/syslinux/bios'}
: ${bios_src='/usr/share/syslinux'}

: ${bootiso_url='https://git.io/bootiso'}
: ${bootiso='/tmp/bootiso'}
: ${bootiso_args="--mrsync -t exfat -d ${target_dev} ${target_iso}"}

name='win10-usb'; esc='\\e'; reset="${esc}[0m"
green() { local string="${1}"; echo -e "${esc}[32m${string}${reset}"; }
blue() { local string="${1}"; echo -e "${esc}[34m${string}${reset}"; }
magenta() { local string="${1}"; echo -e "${esc}[35m${string}${reset}"; }
log() { local string="${1}"; echo -e "[$(blue $name)] ${string}"; }

install_exfat_dependencies() {
    # Fedora does not have these installed by default.
    log "Enabling $(magenta "RPM Fusion repos")..."
        sudo dnf install -y "https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm" "https://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm"
    log "Installing $(magenta "exFAT") dependencies..."
    sudo dnf install -y ${exfat_dependencies}
}

patch_bios() {
    # Fedora does not put c32 bios module files in the expected location.
    log "Patching $(magenta "c32 bios module files") into the expected location..."
    sudo mkdir -pv $bios_dst
    sudo rsync -av $bios_src $bios_dst
}

download_bootiso() {
    # Download the bootiso script and make it executable.
    log "Downloading $(green "bootiso") script from $(magenta "${bootiso_url}") to $(magenta "${bootiso}")..."
    curl -L $bootiso_url > $bootiso
    chmod +x $bootiso
}

main() {
    # Do the thing.
    patch_bios
    install_exfat_dependencies
    download_bootiso

    log "Executing $(magenta "${bootiso} ${bootiso_args}")..."
    $bootiso $bootiso_args

    log "$(green "Hopefully everything worked out!") 🤞"
}

main