automatically downloads and updates chromium nightly

chromium-update.sh

#!/bin/bash

d="$HOME/opt/chromium"
v="$d/VERSION"
u="http://build.chromium.org/f/chromium/snapshots/chromium-rel-linux"
downloads="$HOME/Downloads"
unzipped="$downloads/chrome-linux"
zip_file="$downloads/chrome-linux.zip"

latest="$(curl "$u/LATEST" 2> /dev/null)"
echo "Latest version: $latest"

if [[ -f "$v" ]]
then
    local_version="$(cat "$v")"
else
    local_version="0"
fi

echo "Local version: $local_version"

if (( "$latest" > "$local_version" ))
then
    wget "$u/$latest/chrome-linux.zip" -O "$zip_file"
    unzip "$zip_file" -d "$downloads"
    echo "moving $unzipped to $d"
    rm -rf "$d"
    rm "$zip_file"
    mv "$unzipped" "$d"
    echo "$latest" > "$v"
fi