#!/usr/bin/env bash

# usage:
# download-gdrive {FILE_ID} {FILENAME}

if [[ "$(uname)" == "Darwin" ]]; then
    CONFIRM=$(wget --quiet --save-cookies /tmp/cookies.txt --keep-session-cookies --no-check-certificate "https://docs.google.com/uc?export=download&id=$1" -O- | gsed -rn 's/.*confirm=([0-9A-Za-z_]+).*/\1\n/p')
elif [[ "$(expr substr $(uname -s) 1 5)" == "Linux" ]]; then
    CONFIRM=$(wget --quiet --save-cookies /tmp/cookies.txt --keep-session-cookies --no-check-certificate "https://docs.google.com/uc?export=download&id=$1" -O- | sed -rn 's/.*confirm=([0-9A-Za-z_]+).*/\1\n/p')
fi
wget --load-cookies /tmp/cookies.txt "https://docs.google.com/uc?export=download&confirm=$CONFIRM&id=$1" -O $2
rm -rf /tmp/cookies.txt
