wine-patch.sh

#!/bin/sh
# Created by Jacob Hrbek <kreyren@rixotstudio.cz> under the terms of GPL-3 (https://www.gnu.org/licenses/gpl-3.0.en.html) in 2020
# Created for https://bugs.winehq.org/show_bug.cgi?id=45546#c26

MAINTAINER="kreyren@rixotstudio.cz"

# Simplified assertion
die() { printf 'FATAL: %s\n' "$2" ; exit "$1" ;}

# Simplified output handling
einfo() { printf 'INFO: %s\n' "$1" ;}
edebug() { [ -n "$DEBUG" ] && printf 'DEBUG: %s\n' "$1" ;}

# Instruct the end-user about bugs
einfo "This script has been created for https://bugs.winehq.org/show_bug.cgi?id=45546#c26, contact maintainer on $MAINTAINER if you encountered any issues"

# Patching
case "$1" in
	[0-9][0-9][0-9][0-9][0-9])
		# Fetch source
		if [ ! -d /usr/src/wine ]; then
			# File hierarchy check
			if [ ! -d /usr ]; then
				die 255 "This system doesn't have pathname '/usr' assuming unsupported file hierarchy, contact $MAINTAINER with details"
			elif [ -d /usr ]; then
				edebug "Directory '/usr' is present, assuming supported file hierarchy"
			fi

			# Source directory check
			if [ ! -d /usr/src ]; then
				if [ "$(id -u)" != 0 ]; then
					if command -v sudo >/dev/null; then
						sudo mkdir /usr/src || die 1 "Unable to make a new directory using sudo in /usr/src for source fetching"
					elif ! command -v sudo >/dev/null; then
						einfo "We are unable to make a new directory in '/usr/src' which is expected to be used for source fetching, inspect the script and if you don't see anything malicion then please enter your root password to work around root evelation for this directory"
						su root -c "mkdir /usr/src || die 1 \"Unable to make a new directory in '/usr/src'\"" || die 3 "Unable to evelate root permission to make a new directory in /usr/src"
					else
						die 255 "Unexpected happend in checking for pathname '/usr/src', contact maintainer on $MAINTAINER with details"
					fi
				elif [ "$(id -u)" = 0 ]; then
					mkdir /usr/src/wine || die 1 "Unable to make a new directory in '/usr/src'"
				else
					die 255 "User id is $(id -u) which is unexpected for creating directory '/usr/src', contact maintainer on $MAINTAINER with details"
				fi
			elif [ -d /usr/src ]; then
				edebug "Directory '/usr/src' is present, skipping creation"
			else
				die 255 "Unexpected happend while checking for pathname /usr/src, contact maintainer on $MAINTAINER with details"
			fi

			# Source fetch
			if [ ! -d /usr/src/wine ]; then
				# Check if 'git' is installed
				if ! command -v git >/dev/null; then die 126 "Command 'git' is not executable on this system, please install it to fetch wine source and re-invoke this script"; fi

				# Clone
				if [ "$(id -u)" != 0 ]; then
					if command -v sudo >/dev/null; then
						sudo git clone https://github.com/wine-mirror/wine.git /usr/src/wine || die 1 "Unable to clone wine source in ''/usr/src/wine'"
					elif ! command -v sudo >/dev/null; then
						einfo "We are unable to clone wine source in /usr/src/wine without root permission, inspect the script and if you don't see anything malicion then please parse your root password"
						su root -c "git clone https://github.com/wine-mirror/wine.git /usr/src/wine || die 1 \"Unable to clone wine source in '/usr/src/wine'\"" || die 3 "Unable to elevate root permission to clone wine source in '/usr/src/wine'"
					fi
				elif [ "$(id -u)" = 0 ]; then
					git clone https://github.com/wine-mirror/wine.git /usr/src/wine || die 1 "Unable to clone wine source in '/usr/src/wine'"
				fi
			elif [ -d /usr/src/wine ]; then
				edebug "Directory '/usr/src/wine' already exists, skipping cloning"
			else
				einfo "Unexpected happend in cloning /usr/src/wine, contact the maintainer on $MAINTAINER with details"
			fi

		elif [ -f /usr/src/wine ]; then
			die 1 "File '/usr/src/wine' is present where directory is expected, please rename and re-invoke this script"
		elif [ -d /usr/src/wine ]; then
			edebug "Directory /usr/src/wine is already present, skipping creation.."
		elif [ -h /usr/src/wine ]; then
			die 1 "File '/usr/src/wine' is a symbolic link which is unexpected, expecting a directory or non-existing pathname to be created"
		else
			die 255 "Unexpected happend while creating a directory '/usr/src/wine', contact $MAINTAINER with details"
		fi

		# Check for caching directory
		if [ ! -d "$HOME/.cache" ]; then
			mkdir "$HOME/.cache" || die 1 "Unable to make a new directory in '$HOME/.cache' used for caching wine patches"
			# Inform the end-user about created directory
			einfo "Directory '$HOME/.cache' has been created for caching"
		elif [ -d "$HOME/.cache" ]; then
			edebug "Directory '$HOME/.cache' is present, skipping creation"
		elif [ -f "$HOME/.cache" ]; then
			die 1 "Pathname '$HOME/.cache' is a file where directory is expected, rename the pathname and re-invoke the script, we need this path name for caching of wine patches"
		elif [ -h "$HOME/.cache" ]; then
			die 1 "Pathname '$HOME/.cache' is a symbolic link which is unexpected, expecting directory for caching"
		else
			die 255 "Unexpected happend in "
		fi

		# Create cache for this script
		if [ ! -d "$HOME/.cache/wine-patches" ]; then
			mkdir "$HOME/.cache/wine-patches" || die 1 "Unable to make a new directory in '$HOME/.cache/wine-patches' which is expected to be used for caching of wine patches"
		elif [ -f "$HOME/.cache/wine-patches" ]; then
			die 1 "Pathname '$HOME/.cache/wine-patches' is a file where directory for caching wine patches is expected"
		elif [ -h "$HOME/.cache/wine-patches" ]; then
			die 1 "Pathname '$HOME/.cache/wine-patches' is a symbolic link which is unexpected, expecting directory"
		elif [ -d "$HOME/.cache/wine-patches" ]; then
			edebug "Directory '$HOME/.cache/wine-patches' already exists, skipping creation"
		else
			die 255 "Unexpected happend in checking for '\$HOME/.cache/wine-patches', contact matainer on $MAINTAINER with details"
		fi

		# Cache wine-patch
		if [ ! -f "$HOME/.cache/wine-patches/$1" ]; then
			wget "https://bugs.winehq.org/attachment.cgi?id=$1" -O "$HOME/.cache/wine-patches/$1" || die 1 "Unable to fetch winepatch $1"
		elif [ -f "$HOME/.cache/wine-patches/$1" ]; then
			edebug "File $HOME/.cache/wine-patches/$1 already exists"
		else
			die 255 "Unexpected happend in applying patch $1 to /usr/src/wine"
		fi

		# Apply patch
		if [ "$(id -u)" = 0 ]; then
			if command -v sudo >/dev/null; then
				patch -p1 --quiet --directory=/usr/src/wine < "$HOME/.cache/wine-patches/$1" || die 1 "Unable to apply patch '$HOME/.cache/wine-patches/$1' in /usr/src/wine, contact maintainer on $MAINTAINER with details"
			elif ! command -v sudo >/dev/null; then
				einfo "To apply patch in /usr/src/wine we need root permission, please inspect the script and if you don't see anything malicious then provide your root password"
				su root -c "patch -p1 --quiet --directory=/usr/src/wine < \"$HOME/.cache/wine-patches/$1\" || die 1 \"Unable to apply patch '$HOME/.cache/wine-patches/$1' in /usr/src/wine, contact maintainer on $MAINTAINER with details\""
			fi
		elif [ "$(id -u)" != 0 ]; then
			patch -p1 --quiet --directory=/usr/src/wine < "$HOME/.cache/wine-patches/$1" || die 1 "Unable to apply patch '$HOME/.cache/wine-patches/$1' in /usr/src/wine, contact maintainer on $MAINTAINER with details"
		else
			die 255 "Unexpected user ID $(id -u) has been parsed, contact maintainer on $MAINTAINER with details"
		fi

		einfo "Patch number $1 has been applied in /usr/src/wine"

		# Return true
		exit 0
	;;
	--help|-h|-help|help)
		printf '%s\n' \
			"Usage: path/to/script [NUMBER_OF_WINEPATCH]" \
			"Applies wine patch to a wine source at /usr/src/wine" \
			"" \
			"Report bugs to: $MAINTAINER"
	;;
	*) die 2 "This script expects a one argument beeing number of the patch that is expected to be applied where '$1' was provided which is unsupported, contact maintainer on $MAINTAINER if you think that this should be supported"
esac