install

#!/usr/bin/env bash

declare HEADLESS

prompt_boolean() {
	local var_name="$1"
	local message="$2"
	local default=${3:-1}

	yn="$([ "$default" -eq 0 ] && echo -n "[y/N]" || echo -n '[Y/n]')"

	echo -n "$message $yn " && read -r input

	[ "$input" = "y" ] || [ "$input" = "Y" ] && {
		eval "$var_name=1"
		return
	}

	[ "$input" = "n" ] || [ "$input" = "N" ] && {
		eval "$var_name=0"
		return
	}

	[ "$input" = "" ] && {
		eval "$var_name=$default"
		return
	}

	prompt_boolean "$1" "$2" "$3"
}

get_config() {
	prompt_boolean 'HEADLESS' 'Do you want to install on a headless machine?'
	export HEADLESS
}

execute_with_privilege() {
	local base_dir="$1"
	[ "$base_dir" = 'system' ] && {
		sudo ${@:2}
		return $?
	} || {
		${@:2}
		return $?
	}
}

get_destination_dir() {
	local base_dir="$1"

	[ $base_dir = 'system' ] && echo -n "/" || echo -n "$HOME"
}

assert_destination_directories() {
	local base_dir="$1"
	local dest_dir=$(get_destination_dir "$base_dir")

	find "$base_dir" -type d | while read dir; do
		local path="$dest_dir/$(echo "$dir" | sed "s/$base_dir//")"

		execute_with_privilege "$base_dir" mkdir -p "$path" 2>/dev/null
	done
}

setup_symlinks() {
	local base_dir="$1"

	assert_destination_directories "$base_dir"
	execute_with_privilege "$base_dir" stow -t "$(get_destination_dir "$base_dir")" "$base_dir"
	return $?
}

main() {
	get_config
	setup_symlinks user || exit 1
	setup_symlinks system || exit 1

	./setup/setup-nnn || exit 1
	{
		[ "$HEADLESS" -eq 0 ] && ./setup/setup-keyboard
	} || exit 1 && echo 'keyboard setup [ok]'
	{
		[ "$HEADLESS" -eq 0 ] && ./setup/setup-fonts
	} || exit 1 && echo 'font setup [ok]'
	{
		[ "$HEADLESS" -eq 0 ] && ./setup/setup-system
	} || exit 1 && echo 'system setup [ok]'

	sudo locale-gen || exit 1
}

main