update-chrome

#!/bin/bash

#
# Dank Chrome updater
#

# CMD Macros
get_time() { CURRENT_TIME=$(awk '{ print $4 " " $5 }' <(date)); };

# Paths
PACKAGE_DIR=${HOME}/.packages/google-chrome;
LOG_DIR=${HOME}/.log;
CURRENT_DIR=$(pwd);

# Files
LOG_FILE=${LOG_DIR}/update-chrome.log;

# Flags
UPDATE_AVAILABLE=;
LOG_OPEN=false;

# Variables
CURRENT_VERSION=;
CURRENT_TIME=;

# imported vars from original script
CHANNEL=;
PKG=;
VER=;

function logAction() {
	local CALLER="$1";
	local MESSAGE="$2";

	if [ "$LOG_OPEN" == false ]; then
		LOG_OPEN=true;
		echo >> $LOG_FILE && date >> $LOG_FILE;
	fi;
	get_time;
	printf " %s %s %s: " $CURRENT_TIME $CALLER >> $LOG_FILE;
	echo $MESSAGE >> $LOG_FILE;
	return 0;
}
function fetchInfo() {
	logAction fetchInfo "fetchInfo called."
	CHANNEL=$(awk -F '=' '/^_channel/{ print $2 }' PKGBUILD);
	PKG="google-chrome-${CHANNEL}";
	VER=$(curl -sSf https://dl.google.com/linux/chrome/deb/dists/stable/main/binary-amd64/Packages |
		grep -A1 "Package: ${PKG}" |
		awk '/Version/{print $2}' |
		cut -d '-' -f1);
	return 0;	
}
function checkVersion() {
	logAction checkVersion "checkVersion called."
	# store current version, check against available
	sed -i \
		-e "s/^pkgver=.*/pkgver=${VER}/" \
		PKGBUILD
	if (git diff --exit-code PKGBUILD); then
		UPDATE_AVAILABLE=false;
	else
		UPDATE_AVAILABLE=true;
	fi;
	return 0;
}
function updatePackage() {
	logAction updatePackage "updatePackage function called."

	sed -i \
		-e 's/pkgrel=.*/pkgrel=1/' \
		PKGBUILD
	updpkgsums
	makepkg --printsrcinfo >.SRCINFO
	git add PKGBUILD .SRCINFO
	git commit -m "${PKG} v${VER}"

	return 0;
}
function main() {
	logAction main "Update script called";
	
	echo "Checking for chrome updates...";
	cd $PACKAGE_DIR;
	
	fetchInfo;
	checkVersion;

	if [ "$UPDATE_AVAILABLE" == true ]; then
		updatePackage
		aurmk
		echo "Chrome has been updated to the latest version. Check log directory for more info."
		logAction main "Chrome has been updated."
	else
		echo "Chrome is currently up to date: version ${VER}"
		echo "Check log for more info."
		logAction main "Chrome has not been updated."
	fi;
	
	cd $CURRENT_DIR	
	return 0;
}

main;
exit 0;