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#!/bin/sh
help() {
echo "nx - create new script"
echo "USAGE: nx <script_name>"
}
err() { printf '%s: %s\n' "$0" "$@" >&2; exit 1; }
warn() {
printf '%s: %s [Y/n] ' "$0" "$@" >&2; read -r arg
case "$arg" in ''|y|Y) ;; *) exit ;; esac
}
while getopts 'h' o; do case "$o" in
h) help >&2; exit ;;
*) err "invalid option -- '$OPTARG'" ;;
esac done
shift $((OPTIND - 1))
[ "$#" -lt 1 ] && help && exit 1
[ "$#" -gt 1 ] && err "too many arguments. Only one expected"
new_file() {
cat << EOF > "$1"
#!/bin/sh
help() { echo "$1 -
USAGE:
$1 [OPTION]...
OPTIONS:
-h show this help message"; }
err() { printf '$1: %s\n' "\$@" >&2; exit 1; }
while getopts 'h' o; do case "\$o" in
h) help; exit ;;
*) err "invalid option -- '\$OPTARG'" ;;
esac done
shift \$((OPTIND - 1))
[ "\$#" -lt 1 ] && help >&2 && exit 1
EOF
chmod u+x -- "$1" || exit
}
file="$1"
if [ -f "$file" ]; then
[ ! -w "$file" ] && chmod u+rw "$file"
if [ -s "$file" ]; then
warn "'$file' already exists, edit existing file?" || exit
else
warn "an empty file '$file' already exists, fill and edit?" &&
new_file "$file"
fi
elif [ -e "$file" ]; then
err "'$file' already exists and is a non-regular file"
else
new_file "$file"
fi
ls -lF --color -- "$file"
${EDITOR} "$file"
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