install

#!/bin/bash

EXCLUDE_FILES=(README.md install .gitignore .git .config .local)
DOTFILES=$(realpath `dirname -- "${BASH_SOURCE[0]}"`)

OPTSTRING=":bh"
NOBKP=""

_install() {
	echo "installing $1"
	if [ -e "$HOME/$1" ]; then
		if [ -z "${NOBKP}" ]; then
			rm -r "$HOME/$1"
		else
			mv "$HOME/$1" "$HOME/$1".bck
		fi
	fi
	ln -s "$DOTFILES/$1" "$HOME/$1"
}

install_root_dot_files() {
	for f in $(ls -a $DOTFILES)
	do
		if [[ ! $(echo ${EXCLUDE_FILES[@]} |  grep -w $f) ]]; then
			_install "$f"	
		fi
	done
}

install_config_files() {
	mkdir -p ~/.config
	for f in $(ls $DOTFILES/.config)
	do
		if [[ ! $(echo ${EXCLUDE_FILES[@]} |  grep -w .config/$f) ]]; then
			_install ".config/$f"	
		fi
	done
}

install_local_bin_files() {
	mkdir -p ~/.local/bin/
	for f in $(ls $DOTFILES/.local/bin)
	do
		if [[ ! $(echo ${EXCLUDE_FILES[@]} |  grep -w .local/bin/$f) ]]; then
			_install ".local/bin/$f"	
		fi
	done
}

usage() {
	script_name=$(basename -- "${BASH_SOURCE[0]}")
	echo "usage: $script_name [-b|h]"
	echo "       -b create bkp files instead of removing old configs"
	echo "       -h shows this help message"
}

setup_vim() {
	echo "Cloning minpac package for vim"
	mkdir -p ~/.config/vim/pack/minpac/opt
	pushd ~/.config/vim/pack/minpac/opt
	git clone git@github.com:k-takata/minpac.git
	popd
	echo "minpac installed."
	echo "you should complete vim install by running vim +PackUpdateAndQuit +q"
}

while getopts ${OPTSTRING} opt; do
	case ${opt} in
		b)
			NOBKP=1
			;;
		h)
			usage
			exit 0
			;;
		?)
			echo "Invalid option: -${OPTARG}."
			exit 1
			;;
	esac
done

echo "installing config files from $DOTFILES"
install_root_dot_files
install_config_files
install_local_bin_files
setup_vim
echo "installation finished. You may need to complete the set up for progrmas"
echo "like vim (:PackUpdate) and neovim (:Lazy and :Mason)"