Terminal output copier

tcp.sh

#!/usr/bin/bash
# This copies the complete output of a command piped to it, or a complete file
# including unprintable characters, making it nice for copying terminal output
# for use elsewhere, like a on Discord Forum in-between "```" tags, or HTML
# "<pre></pre>" tags.
#
# Installation instructions:
# 1. Just copy it anywhere you like. For exaample, I'm using /usr/local/bin/
#    so that it's easier sysstem-wide, should it be necessary for acecess by
#    more than one user. If not, you can copy it anywhere.
#
# 2. Now you need to source the file. I use ZSH so mine is sourced in
#    $HOME/.zshrc but yours may vary. Because I usee ZSH, I couldn't test it
#    in another environment so am not sure it would  work elsewhere, but
#    I suspect it'll work fine in bash as well. To source the script, run the
#    following:
#      echo "[[ -f <fileLocation>/tcp.sh ]] && source <fileLocation>/tcp.sh" >> <configFile>
#    Where:
#       * <fileLocation> is the directory containing the tcp.sh file,
#         for example /usr/local/bin/; and
#       * <configFile> is your shells config file. Since I use ZSH, mine is
#         ~/.zshrc, but yours may vary.
# 3. Re-login to your computer or just source the .zshrc or .bashrc, or open a new terminal
#    which will do it for you. It should now be usable, either by:
#    * Piping the output directly to it:
#      <command> | tcp
#    * or, if it's a file you wish to copy:
#      tcp <path/to/file.txt>
#
# Note that this is per-user and not global.
# Also note that it has only been tested on plain text ffiles.
# Lastly note that this is, at least for now, x11 ONLY.

tcp() {
    if [[ ! "$XDG_SESSION_TYPE"  == "x11" ]];
    then
        echo "tcp only works on X sessions. No X session detected. Cannot continue."
        exit 1
    fi
    if [ "$#" -gt "0" ]; then
        # process args on command line
        if [ -f "$1" ]; then
            TXTTOCOPY=$(cat "${1}")
        fi
    else
        # no argument, so must be must be from stdin (piped)
        if input=$(cat); then
            TXTTOCOPY=$(printf '%s' "${input}")
            
        fi
    fi
    if xsel --clipboard <<< "${TXTTOCOPY}";
    then
        echo "Sucessfully copied the below text to the clipboard:"
        echo
        echo "${TXTTOCOPY}"
    fi
}