backup

#!/usr/bin/env bash

set -e

DOTFILES_BACKUP_DELETE_LOCAL=0

DOTFILES_BACKUP_DIR=".dotfiles.bak.$(date +'%Y%m%d-%H%M')"

function dotfiles_backup {

	for file_name in \
		".bash_aliases"               \
		".bash_functions"             \
		".bash_logout"                \
		".bash_profile"               \
		".bashrc"                     \
		".dotfiles/.bashrc.env.local" \
		".dotfiles/.bashrc.local"     \
		".gitconfig"                  \
		".dotfiles/.gitconfig.local"  \
		".gitignore.global"           \
		".minttyrc"                   \
		".vimrc"                      \
		".xbindkeysrc"                \
		".Xmodmap"
	do
		if [ -f ~/${file_name} ] && [ ! -L ~/${file_name} ] ; then
			dotfile_backup ${file_name}
		fi
	done
}

function dotfile_backup {

	if [ -z "$DOTFILES_BACKUP_DIR" ]; then
		echo "Undefined backup directory"
		exit 1
	fi

	if [ ! -d ~/"${DOTFILES_BACKUP_DIR}" ]; then
		mkdir -p ~/"${DOTFILES_BACKUP_DIR}"
	fi

	local file_name=$*

	if [ -f ~/"${file_name}" ] && [ ! -L ~/"${file_name}" ] ; then
	  local dest_file_name; dest_file_name=$(basename "$file_name")
		echo "Backing up ~/${DOTFILES_BACKUP_DIR}/${file_name}"
		cp ~/"${file_name}" ~/"${DOTFILES_BACKUP_DIR}/${dest_file_name}"
	fi

	if [ -f ~/"${DOTFILES_BACKUP_DIR}/${file_name}" ] && [ "$DOTFILES_BACKUP_DELETE_LOCAL" = "1" ]; then
		rm ~/"${file_name}"
	fi
}

# Read command options
while getopts ":-:" opt; do
    case "${OPTARG}" in
    delete)
        DOTFILES_BACKUP_DELETE_LOCAL=1
        ;;
    esac
done

# Run
dotfiles_backup