Checks whether server-side languages (NodeJS, Python, Java etc) and databases (MariaDB / PostgreSQL etc) are installed and linked

checkFor

#/bin/bash

# Usage:
## . checkFor
## checkFor PACKAGE

checkFor() {
    langs=(
        mysql
        mariadb
        postgre
        postgres
        postgresql
        redis
        ruby
        lua
    )
    
    for cmd in "$@" ; do
        for lang in ${langs[@]}; do
            ! [ $cmd == $lang ] && echo "This is not a database system or serverside code language or it is not supported" && exit 1
        done
    
        if ! command -v "$cmd"; then
            if ! [ -d /usr/local/$cmd ]; then
                echo "$cmd is not installed!"
                exit 1
            fi
        fi
    done
}