symlink-setup.sh

#!/bin/bash

# this symlinks all the dotfiles (and .vim/) to ~/
# it also symlinks ~/bin for easy updating

# this is safe to run multiple times and will prompt you about anything unclear

answer_is_yes() {
	[[ "$REPLY" =~ ^[Yy]$ ]] &&
		return 0 ||
		return 1
}

ask() {
	print_question "$1"
	read
}

ask_for_confirmation() {
	print_question "$1 (y/n) "
	read -n 1
	printf "\n"
}

ask_for_sudo() {

	# Ask for the administrator password upfront
	# sudo -v

	# Update existing `sudo` time stamp until this script has finished
	# https://gist.github.com/cowboy/3118588
	while true; do
		sudo -n true
		sleep 60
		kill -0 "$$" || exit
	done &>/dev/null &

}

cmd_exists() {
	[ -x "$(command -v "$1")" ] &&
		printf 0 ||
		printf 1
}

execute() {
	$1 &>/dev/null
	print_result $? "${2:-$1}"
}

get_answer() {
	printf "$REPLY"
}

get_os() {

	declare -r OS_NAME="$(uname -s)"
	local os=""

	if [ "$OS_NAME" == "Darwin" ]; then
		os="osx"
	elif [ "$OS_NAME" == "Linux" ] && [ -e "/etc/lsb-release" ]; then
		os="ubuntu"
	fi

	printf "%s" "$os"

}

is_git_repository() {
	[ "$(
		git rev-parse &>/dev/null
		printf $?
	)" -eq 0 ] &&
		return 0 ||
		return 1
}

mkd() {
	if [ -n "$1" ]; then
		if [ -e "$1" ]; then
			if [ ! -d "$1" ]; then
				print_error "$1 - a file with the same name already exists!"
			else
				print_success "$1"
			fi
		else
			execute "mkdir -p $1" "$1"
		fi
	fi
}

print_error() {
	# Print output in red
	printf "\e[0;31m  [✖] $1 $2\e[0m\n"
}

print_info() {
	# Print output in purple
	printf "\n\e[0;35m $1\e[0m\n\n"
}

print_question() {
	# Print output in yellow
	printf "\e[0;33m  [?] $1\e[0m"
}

print_result() {
	[ $1 -eq 0 ] &&
		print_success "$2" ||
		print_error "$2"

	[ "$3" == "true" ] && [ $1 -ne 0 ] &&
		exit
}

print_success() {
	# Print output in green
	printf "\e[0;32m  [✔] $1\e[0m\n"
}

#
# actual symlink stuff
#

# finds all .dotfiles in this folder
declare -a FILES_TO_SYMLINK=$(find . -type f -maxdepth 1 -name ".*" -not -name .DS_Store -not -name .git -not -name .macos -not -name "*.sh" | sed -e 's|//|/|' | sed -e 's|./.|.|')
FILES_TO_SYMLINK="$FILES_TO_SYMLINK .vim bin .pip .config/fish" # add in vim and the binaries

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

main() {

	local i=""
	local sourceFile=""
	local targetFile=""

	for i in ${FILES_TO_SYMLINK[@]}; do

		sourceFile="$(pwd)/$i"
		targetFile="$HOME/$(printf "%s" "$i" | sed "s/.*\/\(.*\)/\1/g")"

		if [ -e "$targetFile" ]; then
			if [ "$(readlink "$targetFile")" != "$sourceFile" ]; then

				ask_for_confirmation "'$targetFile' already exists, do you want to overwrite it?"
				if answer_is_yes; then
					rm -rf "$targetFile"
					execute "ln -fs $sourceFile $targetFile" "$targetFile → $sourceFile"
				else
					print_error "$targetFile → $sourceFile"
				fi

			else
				print_success "$targetFile → $sourceFile"
			fi
		else
			execute "ln -fs $sourceFile $targetFile" "$targetFile → $sourceFile"
		fi

	done

}

main