Edit BASH shell script

edsh

#!/usr/bin/env bash
# edsh v1.4.27 - March 3, 2014
_me="${0##*/}"

# Test for file name
[[ $# -ne 1 ]] && { echo -en "Usage:\t$_me command_name\n"; exit 1; }
_file=~/bin/$1

# If needed, create a new command file
if [[ ! -e $_file ]]; then
	_today="$(date '+%A, %B %-d, %Y')"
	#_today=$(php -r 'echo date("M d, Y");')
	echo -e "#!/usr/bin/env bash\n# ${_file##*/} v1.0.0 - $_today\n_me=\"\${0##*/}\"\n\n\n# Housekeeping\nunset _me" >$_file
	chmod 700 $_file
fi
# Check for ~/Backups folder
[ ! -d ~/Backups ] && mkdir ~/Backups
[ -e "$1~" ] && mv "$1~" ~/Backups
# Edit the command file
nano -B -C ~/Backups -T 4 $_file

# Housekeeping
unset _me _file _today