Chromium Nightly Updater

chromium-update-nightly.sh

#!/bin/bash -exv
# __________________________
# chromium-update-nightly.sh
#
# Simple updater that keeps track of partial downloads and if an update is even needed.
#
# ~trevorj 043013
#

fn="$HOME/Downloads/chrome-linux-latest.zip"
dest="$HOME/.local"
base_url="http://commondatastorage.googleapis.com/chromium-browser-continuous/Linux_x64"
chrome_sandbox="$dest/chrome-linux/chrome_sandbox"

function e              { echo "[$0]" "$@"; }
function debug          { [[ -z "$DEBUG" ]] || e "$@"; }
function error          { e "$@" >&2; }
function death          { error "$@"; exit 1; }

fn_installed="${fn%.zip}-installed.zip"
fn_installed_idx="$dest/chrome-linux/.index"

[[ ! -f "$fn_installed_idx" ]] \
    || idx_installed=$(cat "$fn_installed_idx")

fn_idx="${fn%.zip}.index"
idx=$(wget -q -O - "$base_url/LAST_CHANGE")
test -n "$idx"

[[ "$idx" != "$idx_installed" ]] \
    || death "The version currently installed is up to date (latest=$idx installed=$idx_installed)"

fn_partial="$fn.partial"
fn_partial_idx="${fn_partial%.zip}.index"

[[ ! -f "$fn_partial" && ! -f "$fn_partial_idx" ]] \
    || idx_partial=$(cat "$fn_partial_idx")

[[ "$idx" == "$idx_partial" ]] \
    || rm -f "$fn_partial"

echo "$idx" > "$fn_partial_idx"
wget -c -O "$fn_partial" "$base_url/$idx/chrome-linux.zip"

mv "$fn_partial" "$fn"
mv "$fn_partial_idx" "$fn_idx"

test -d "$dest" \
    || death "Destination directory does not exist?"
unzip -o -d "$dest" "$fn"

mv "$fn" "$fn_installed"
mv "$fn_idx" "$fn_installed_idx"


##
## Fix chrome sandbox setuid
##

# Sandbox must be setuid and such, so let it be, let it be
sudo chown root:root "$chrome_sandbox"
sudo chmod 4755 "$chrome_sandbox"