Script that hits cht.sh with query, results in a new tmux window

cheat.sh

#!/bin/bash

## Functions

usage()
{
    echo "Usage: $(basename $0) <arg> [args...]" 1>&2
    exit 1
}


join_by()
{
    local IFS="$1"
    shift
    echo "$*"
}


## Main program

SLUG="$1"
[ -z "$SLUG" ] && usage
shift

URL="https://cht.sh/$SLUG"
if [ -n "$1" ]; then
    URL="$URL/$(join_by '+' $@)"
fi

COMMAND="curl -s $URL | less -R"

if [ -n "$TMUX" ]; then
    tmux new-window -n cht.sh "$COMMAND"
else
    bash -c "$COMMAND"
fi