Duelyst linux download & run script

#!/bin/sh

update() {
    echo "Downloading lastest version..."
    wget -q --show-progress http://downloads.counterplay.co/duelyst/v$VERSION/duelyst-v$VERSION-win32-x64.zip
    echo "Extracting lastest version..."
    unzip -q "duelyst-v$VERSION-win32-x64.zip" -d "duelyst-v$VERSION"

    #Edit to run on Linux
    echo "Editing files..."
    cd duelyst-v$VERSION/resources/app
    sed -i "s/app.on('ready', function () {/app.on('ready', function () {\n  argv.token = '32432543254'\n/" desktop.js
    sed -i "/if (pkgJson.name === 'duelyst' && argv.token === undefined) {/,+12d" desktop.js
    sed -i "s/fullscreen: \!argv.windowed/fullscreen: false/" desktop.js
    sed -i "s/if (process.platform === 'win32') setupWin32Shortcuts()/if (process.platform === 'win32' || process.platform === 'linux') setupWin32Shortcuts()/" desktop.js

    #Install dependencies through npm
    echo "Insalling duelyst dependencies..."
    npm install electron-packager --silent
    npm install electron --save   --silent

    #Package game
    echo "Packaging..."
    ./node_modules/.bin/electron-packager . $npm_package_product_name --asar --platform=linux --overwrite --arch=x64 --app-version=$npm_package_version --icon=icon.icns --out=build --ignore='build|node_modules/gulp-*|node_modules/(electron-packager|electron-prebuilt|electron-rebuild|electron-windows-installer|electron-connect|gulp|tape)'

    echo "Moving build..."
    rm -rf ../../../Duelyst-linux-x64
    mv build/Duelyst-linux-x64/ ../../..
    mv icon.png ../../../icon.png
    
    echo "Removing temporary files from download..."
    cd ../../..
    rm -rf duelyst-v$VERSION*

    echo "Saving current version..."
    echo $VERSION > version

    echo "Making a .desktop launcher..."
    echo "[Desktop Entry]" > ~/.local/share/applications/Duelyst.desktop
	echo "Name=Duelyst" >> ~/.local/share/applications/Duelyst.desktop
    echo "Comment=The ULTIMATE collectible tactics game. Competitive head-to-head turn-based battles at its best!" >> ~/.local/share/applications/Duelyst.desktop
	echo "Exec=$DIR/duelyst.sh" >> ~/.local/share/applications/Duelyst.desktop
	echo "Icon=$DIR/icon.png" >> ~/.local/share/applications/Duelyst.desktop
	echo "Terminal=false" >> ~/.local/share/applications/Duelyst.desktop
	echo "Type=Application" >> ~/.local/share/applications/Duelyst.desktop
    echo "Categories=Game;" >> ~/.local/share/applications/Duelyst.desktop
}

echo "Navigating to directory..."
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
cd $DIR

echo "Checking dependencies..."

echo -n "curl... "
hash curl    2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that curl is installed and avaiable"   ; exit 1;}

echo -en "\nwget... "
hash wget    2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that wget is installed and avaiable"   ; exit 1;} 

echo -en "\ngrep... "
hash grep    2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that grep is installed and avaiable"   ; exit 1;} 

echo -en "\ntail... "
hash tail    2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that tail is installed and avaiable"   ; exit 1;} 

echo -en "\ncat... "
hash cat     2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that tail is installed and avaiable"   ; exit 1;} 

echo -en "\nhead... "
hash head    2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that head is installed and avaiable"   ; exit 1;} 

echo -en "\nunzip... "
hash unzip   2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that unzip is installed and avaiable"  ; exit 1;} 

echo -en "\nsed... "
hash sed     2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that sed is installed and avaiable"    ; exit 1;} 

echo -en "\nnpm... "
hash npm     2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that npm is installed and avaiable"    ; exit 1;} 

echo -en "\ndirname... "
hash dirname 2>/dev/null || { echo  -e "[FAIL]\nPlease ensure that dirname is installed and avaiable"; exit 1;} 

echo -e "\nALL OK"

echo "Checking lastest version..."
VERSION=$(curl -# https://updates.counterplay.co/ | grep duelyst |grep -v staging | grep zip | tail -c 18 | head -c 6)
echo "Found version $VERSION"

#Check if file local exists
if [ -f version ]; then
    LOCAL_VERSION=$(cat version)
    if [ ! "$LOCAL_VERSION" == "$VERSION" ]; then
        #If local version doesn't match lastest then update
        update
    fi
else
    #If local version file doesn't already exists then game is not installed, install
    update
fi

echo "Launching game..."
./Duelyst-linux-x64/Duelyst -w