Restore original dotfiles when bootstrapping fails

Sometimes it happens that, due to updates of resources used during the bootstrapping process or other unpredictable problems, initialization fails.

The process already backs up the existing files into ~/.dotfiles_backup, but in case of failures it does not restore the original resources.

dotfiles/bootstrap

Lines 63 to 65 in 70a9339

    
           echo "==> Initializing dotfiles" 
        
           BACKUP_DIR=${BACKUP_DIR:-$HOME/.dotfiles_backup} 
        
           (config checkout &>/dev/null || (backup ${BACKUP_DIR} && config checkout)) || (echo "==> failed" && exit 1)

	echo "==> Initializing dotfiles"
	BACKUP_DIR=${BACKUP_DIR:-$HOME/.dotfiles_backup}
	(config checkout &>/dev/null \|\| (backup ${BACKUP_DIR} && config checkout)) \|\| (echo "==> failed" && exit 1)