Deduplicae $PATH in .rc file

LovelyScript.sh

#            _              
#    _______| |__  _ __ ___ 
#   |_  / __| '_ \| '__/ __|
#  _ / /\__ \ | | | | | (__ 
# (_)___|___/_| |_|_|  \___|


# Deduplicate path variables
get_var () {
    eval 'printf "%s\n" "${'"$1"'}"'
}
set_var () {
    eval "$1=\"\$2\""
}
dedup_pathvar () {
    pathvar_name="$1"
    pathvar_value="$(get_var "$pathvar_name")"
    deduped_path="$(perl -e 'print join(":",grep { not $seen{$_}++ } split(/:/, $ARGV[0]))' "$pathvar_value")"
    set_var "$pathvar_name" "$deduped_path"
}
dedup_pathvar PATH
dedup_pathvar MANPATH
dedup_pathvar PYTHONPATH