Install requirements for both CentOS and Ubuntu, requires testing

Scripts/install-requirements.bash

@@ -0,0 +1,79 @@
+#!/bin/bash
+
+INSTALLER=""
+INSTALL_PACKAGES=(tmux pv)
+
+echo_install_method() {
+    echo "Found ${1}, using ${1} to install packages"
+}
+
+install_method_centos() {
+
+    # Steamcmd requirements
+    INSTALL_PACKAGES+=(glibc.i686 libstdc++.i686)
+
+    if which dnf >/dev/null 2>&1; then
+        INSTALLER="dnf -y install"
+        echo_install_method "dnf"
+    elif which yum >/dev/null 2>&1; then
+        INSTALLER="yum -y install"
+        echo_install_method "yum"
+    else
+        echo "Unable to determine installer!"
+        return 1
+    fi
+    echo "Installing epel-release, NOT fully configured..., see: https://docs.fedoraproject.org/en-US/epel/"
+    sleep 3
+    "$("${INSTALLER}" epel-release)"
+}
+
+install_method_ubuntu() {
+
+    # Steamcmd requirements
+    INSTALL_PACKAGES+=(lib32gcc1)
+
+    if which apt >/dev/null 2>&1; then
+        INSTALLER="apt install -y"
+        echo_install_method "apt"
+    elif which apt-get >/dev/null 2>&1; then
+        INSTALLER="apt-get install -y"
+        echo_install_method "apt-get"
+    else
+        echo "Unable to determine installer!"
+        return 1
+    fi
+}
+
+main() {
+    # Auto exit is /etc/os-release does not exist, we depend upon this to determine os name
+    if [[ ! -f "/etc/os-release" ]]; then
+        echo "Unable to continue, cannot determine os release as /etc/os-release does not exist"
+        exit 1
+    fi
+
+    # This gets the unquoted os-release name
+    OS_RELEASE="$(grep ^NAME= /etc/os-release | cut -d "=" -f2 | tr -d '"')"
+
+    if [[ "${OS_RELEASE}" = "CentOS Linux" ]]; then
+        install_method_centos || exit
+    elif [[ "${OS_RELEASE}" = "Ubuntu" ]]; then
+        install_method_ubuntu || exit
+    else
+        echo "${OS_RELEASE} is not a supported distribution, attempt a manual installation."
+        exit 1
+    fi
+
+    if [[ -z "${INSTALLER}" ]]; then
+        echo "No installer found, exiting..."
+        exit 1
+    fi
+
+    for pkg in "${INSTALL_PACKAGES[@]}"; do
+        echo "Installing ${pkg}"
+        "$("${INSTALLER}" "${pkg}")"
+    done
+
+    echo "Finished installing general module items"
+}
+
+main "${@}"