Changed to single script approach

1 files changed, 230 insertions, 0 deletions

diff --git a/update_ungoogled_chromium.sh b/update_ungoogled_chromium.sh
new file mode 100755
index 0000000..c433182
--- /dev/null
+++ b/update_ungoogled_chromium.sh
@@ -0,0 +1,230 @@
+#!/bin/bash
+
+# Shell script to update ungoogled-chromium Portable Linux 64-bit to the latest version
+# $1            -> Wrapper symlink location
+# $2 (optional) -> Install location
+# Return Values:
+	# 0 -> failed
+	# 1 -> success, installed new version
+	# 2 -> success, did not install new version
+
+# If first time installing: user must specify a symlink location and an installation directory
+# If checking for updates: user must pass a symlink for ungoogled-chromium (this is typically just the command name if a symlink is part of the path)
+	# Use the symlink target to determine installation directory
+
+# URL for atom feed
+ATOM_URL="https://raw.githubusercontent.com/ungoogled-software/ungoogled-chromium-binaries/master/feed.xml"
+
+# Default platform to install/update
+PLATFORM="Portable Linux 64-bit"
+
+
+# Print help message
+print_help() {
+	echo "Usage: $0 LINK [LOCATION]"
+	echo
+	echo "LINK is the path for a symlink pointing to the ungoogled-chromium executable"
+	echo "LOCATION is the desired install location for ungoogled-chromium. It does not need to be specified unless installing ungoogled-chromium for the first time"
+}
+
+# Function to compare ungoogled-chromium version numbers
+# $1 -> up-to-date version number (from atom feed)
+# $2 -> currently installed version number
+# Return Values:
+	# 0 -> installed version is up-to-date
+	# 1 -> installed version can be upgraded
+compare_versions() {
+	# Break into arrays
+	local IFS='.'
+	read -ra V1 <<< "$1"
+	read -ra V2 <<< "$2"
+
+	# Determine shorter array (for the loop)
+	local LENGTH=${#V1[@]}
+
+	for (( i = 0 ; i < LENGTH ; i++ )); do
+		if [ "${V1[$i]}" -gt "${V2[$i]}" ]; then
+			return 1
+		elif [ "${V1[$i]}" -lt "${V2[$i]}" ]; then
+			return 0
+		fi
+	done
+
+	return 0
+}
+
+# Function to query for information about latest version of ungoogled-chromium (for specific version)
+# $1 -> platform name
+# Return Values:
+	# 0 -> error
+	# 1 -> success
+fetch_info() {
+	# Get table of available platforms, with versions, and URLs on the following line
+	local PLATFORM_TABLE=$(echo "$PARSED_XML" | grep -E '(/feed/entry/title=)|(/feed/entry/link/@href=)' | sed 's/^.*=//g')
+
+	# grep for PLATFORM in PLATFORM_TABLE, pull out two lines, starting from matching LINE_NUMBER
+	local LINE_NUMBER=$(echo "$PLATFORM_TABLE" | grep -m 1 -n "$PLATFORM" | cut -d ':' -f 1)
+	echo "$PLATFORM_TABLE" | sed -n "$LINE_NUMBER,$((LINE_NUMBER+1))p"
+}
+
+# Function to determine path to install to (and to perform sanity checks on that path)
+# $1 -> LOCATION or LINK target
+# Return Values:
+	# 0 -> failed, should print_help and exit after returning
+	# 1 -> success
+get_install_path() {
+	if [ -n "$1" ]; then
+		if [ ! -e "$1" ]; then
+			echo "Error: $1 does not exist"
+			return 0
+		fi
+		if [ ! -w "$1" ]; then
+			echo "Error: cannot write to $1; insufficient permissions"
+			return 0
+		fi
+
+		echo "$1"
+		return 1
+	fi
+
+	return 0
+}
+
+
+# Exit if $1 does not exist
+if [ -z "$1" ]; then
+	echo "Error: too few arguments"
+	print_help
+	exit 0
+fi
+
+# Fetch info, break and store into variables
+PARSED_XML=$(curl -s $ATOM_URL | xml2)
+
+if [ ! $? -eq 0 ]; then
+	echo "Error: Could not parse atom URL $ATOM_URL"
+	exit 0
+fi
+
+FULL_INFO=$(fetch_info "$PLATFORM")
+
+NAME=$(echo "$FULL_INFO" | head -n 1 | cut -d ':' -f 1)
+VERSION=$(echo "$FULL_INFO" | head -n 1 | cut -d ':' -f 2 | sed 's/^[ ]*//g' | grep -E -o "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+")
+URL=$(echo "$FULL_INFO" | sed -n "2p")
+
+# Check installed version number (if exists and link is valid)
+if [ -h "$1" ] && [ "$(readlink -f "$1" | grep -E -o "[/][^/]*$")" == "/chrome-wrapper" ]; then
+
+	# If the symlink exists, ensure I can write to it
+	if [ ! -w "$1" ]; then
+		echo "Error: Cannot write to $1"
+		print_help
+		exit 0
+	fi
+
+	MY_VERSION=$($1 --version | grep -E -o "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+")
+
+	# Compare versions to determine if an update is necessary
+	compare_versions "$VERSION" "$MY_VERSION"
+	if [ $? -eq 0 ]; then
+		echo "ungoogled-chromium $MY_VERSION is up to date"
+		exit 2
+	fi
+
+	echo -n "Upgrade ungoogled-chromium to $VERSION? [Y/n] "
+	read -r INPUT
+	if [ "$INPUT" == "n" ]; then
+		exit 2
+	fi
+
+	# Get old install location for deletion later
+	OLD_INSTALL=$(get_install_path "$(readlink -f "$1" | sed 's/[/][^/]*$//g')")
+
+	# Get install path
+	INSTALL_TO=$(get_install_path "$(echo "$2" | sed 's/[/]*$//g')")
+	if [ $? -eq 0 ]; then
+		INSTALL_TO=$(get_install_path "$(readlink -f "$1" | sed 's/[/][^/]*[/][^/]*$//g')")
+		if [ $? -eq 0 ]; then
+			print_help
+			exit 0
+		fi
+	fi
+
+else
+	# First time installation
+	if [ -z "$2" ]; then
+		echo "Error: Missing LOCATION argument"
+		print_help
+		exit 0
+	fi
+
+	# If a file exists already (that is not a symlink to ungoogled-chromium), then exit
+	if [ -e "$1" ]; then
+		echo "Error: $1 already exists"
+		print_help
+		exit 0
+	fi
+
+	# Check that a file can be created in this directory
+	touch "$1"
+	if [ ! $? -eq 0 ] || [ ! -w "$1" ]; then
+		echo "Error: Cannot write to $1"
+		print_help
+		exit 0
+	else
+		rm "$1"
+	fi
+
+	# Check install path argument
+	INSTALL_TO=$(get_install_path "$(echo "$2" | sed 's/[/]*$//g')")
+	if [ $? -eq 0 ]; then
+		print_help
+		exit 0
+	fi
+
+	echo -n "Install ungoogled-chromium $VERSION to $INSTALL_TO/? [Y/n] "
+	read -r INPUT
+	if [ "$INPUT" == "n" ]; then
+		exit 2
+	fi
+fi
+
+# Get the realpath of INSTALL_TO
+INSTALL_TO=$(realpath "$INSTALL_TO")
+
+# Download tar file to /tmp
+echo "Downloading ungoogled-chromium $VERSION"
+DOWNLOAD_URL=$(curl -s "$URL" | grep -E -o "href=\".*tar\.xz\"" | cut -d '"' -f 2)
+TAR_FILE="ungoogled-chromium_${VERSION}_linux.tar.xz"
+wget --quiet -O "/tmp/$TAR_FILE" "$DOWNLOAD_URL"
+if [ ! -r "/tmp/$TAR_FILE" ]; then
+	echo "Error: Issue downloading ungoogled-chromium $VERSION from $DOWNLOAD_URL"
+	exit 0
+fi
+
+# Check hash
+echo "Checking MD5 hash"
+HASH=$(curl -s "$URL" | grep "MD5" | sed 's/<[^<>]*>//g;s/[ ]//g' | cut -d ':' -f 2)
+if [ "$HASH" != "$(md5sum "/tmp/$TAR_FILE" | cut -d ' ' -f 1)" ]; then
+	echo "Error: MD5 checksum failed"
+	rm "/tmp/$TAR_FILE"
+	exit 0
+fi
+
+# Extract to INSTALL_TO and get parent directory name from archive
+echo "Extracting to $INSTALL_TO/"
+tar -xf "/tmp/$TAR_FILE" --directory "$INSTALL_TO/" 
+PARENT_DIR=$(tar -tvf "/tmp/$TAR_FILE" | head -n 1 | cut -d ' ' -f 6 | cut -d '/' -f 1)
+
+# Create symlink
+echo "Creating symlink $1"
+ln -fns "$INSTALL_TO/$PARENT_DIR/chrome-wrapper" "$1"
+
+# Cleanup
+echo "Removing /tmp/$TAR_FILE"
+rm "/tmp/$TAR_FILE"
+echo "$OLD_INSTALL" | grep -q "ungoogled-chromium"
+if [ "$?" -eq 0 ] && [ -w "$OLD_INSTALL" ]; then
+	echo "Removing $OLD_INSTALL"
+	rm -r "$OLD_INSTALL"
+fi