#!/bin/bash

#set -x

STEAMCMD=`which steamcmd`
if [ "$?" == 1 ]; then
    echo "ERROR: don't see steamcmd in your \$PATH" 1>&2
    echo 'Download/install instructions are here:' 1>&2
    echo '  https://developer.valvesoftware.com/wiki/SteamCMD' 1>&2
    exit 1
fi

if [ -z $1 -o -z $2 ]; then
    echo "USAGE: $0 <steam_user> <appid> [install_path] [windows|macos|linux] [branchname] [branchpasswd]" 1>&2
    echo "  - defaults to the steamapp-appid-platform in cwd for install path." 1>&2
    echo "  - defaults to 'windows' for platform type." 1>&2
    echo "  - defaults to the default branch for branch name." 1>&2
    echo "  - defaults to no password for the branch password." 1>&2
    exit 1
fi

STEAMUSER="$1"
APPID="$2"
INSTPATH="$3"
PLAT="$4"
BETA="$5"
BETAPASSWD="$6"

if [ -z $PLAT ]; then
    PLAT=windows
fi

if [ -z $INSTPATH ]; then
    INSTPATH="./steamapp-$APPID-$PLAT"
fi

if [ ! -z $BETA ]; then
    BETAARGS="$BETAARGS -beta $BETA"
fi

if [ ! -z $BETAPASSWD ]; then
    BETAARGS="$BETAARGS -betapassword $BETAPASSWD"
fi

# You need bDepotBuilderUnbufferedReads set to zero or this fails on ZFS (which doesn't support O_DIRECT).
"$STEAMCMD" +@bDepotBuilderUnbufferedReads 0 +@sSteamCmdForcePlatformType $PLAT +force_install_dir steamget +login "$STEAMUSER" +app_update "$APPID" $BETAARGS validate +quit
if [ $? == 0 ]; then
    mv $HOME/.steam/steamcmd/steamget "$INSTPATH"
fi