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# -*-eselect-*-  vim: ft=eselect
# Copyright 2005-2017 Gentoo Foundation
# Distributed under the terms of the GNU GPL version 2 or later

inherit config multilib tests

DESCRIPTION="Manage active wine version"
MAINTAINER="NP-Hardass@gentoo.org"

CONFIG_DIR="/etc/eselect/wine"

VARIANTS=(
	vanilla
	staging
	d3d9
	any
)

################################################################################
#                               Eselect Wine                                   #
################################################################################

# Verify that files exist for specified target
# Input: ${P}
is_valid_target(){
	if [[ $# -ne 1 ]]; then
		die "Invalid number of parameters"
	fi
	
	local tgt="$1"

	set_dir_env	

	if [[ ! -d "${wine_bin}" ]] || \
		[[ ! "$(ls -A ${wine_bin})" ]] || \
		[[ ! -e "${wine_bin}/wine" ]]; then
		return 1
	elif [[ ! -e "${EPREFIX}/usr/bin/${tgt}" ]]; then
		return 1
	else
		return 0
	fi

	unset_dir_env
}

# Verify that symlinks are valid
are_symlinks_valid() {
	if [[ $# -gt 1 ]]; then
		die "Invalid number of parameters"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die "Invalid variant"
			fi
		else
			die "Invalid parameter"
		fi
		shift
	done

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	local active=$(get_active ${v_arg})
	local tgt="${active}"
	if [[ "${active}" == "(unset)" ]]; then
		write_error_message "Invalid active config"
		return 1
	fi

	set_dir_env

	local possible_vars=( bin man )
	local symlink_vars=$(load_config "${CONFIG_DIR}/links/${v}" symlink_dirs)
	if [[ -z "${symlink_vars}" ]]; then
		die -q "Missing any configured symlink_dirs"
	fi
	local var

	for var in ${possible_vars[@]}; do
		if has ${var} ${symlink_vars[@]}; then
			symlink_vars=$(list_rm_item "${var}" "${symlink_vars}")
		else
			write_warning_message "Missing '${var}' in ${v} config"
			write_warning_message "Might want to re-run set or update"
		fi
	done
	if [[ ! -z ${symlink_vars} ]]; then
		die -q "Config contains unknown symlink_dirs ${symlink_vars}"
	fi

	symlink_vars=$(load_config "${CONFIG_DIR}/links/${v}" symlink_dirs)
	for var in ${symlink_vars[@]}; do
		local symlinks=$(load_config "${CONFIG_DIR}/links/${v}" ${var})
		local symlink

		if [[ -z "${symlinks}" ]]; then
			die -q "Missing listing of ${var} symlinks"
		fi
		for symlink in ${symlinks[@]}; do
			if [[ ! -L ${symlink} ]]; then
				die -q "${symlink} is not a symlink"
			else
				local file=$(canonicalise ${symlink})
				if [[ ! -e "${file}" ]]; then
					die -q "${symlink} points to nonexistant ${file}"
				else
					eval path=\${wine_${var}}
					path=$(canonicalise "${path}")
					if [[ "${file}" != "${path%/}"/* ]]; then
						write_error_msg "${symlink} points to ${file}"
						die -q "which doesn't appear to be part of wine"
					fi
				fi
			fi
		done
	done

	unset_dir_env
}


# print currently selected wine
get_active() {
	if [[ $# -gt 1 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die -q "Invalid variant"
			fi
		else
			[[ -z $1 ]] || die -q "Invalid parameter"
		fi
		shift
	done

	local active=$(load_config "${CONFIG_DIR}/active" ${v})

	if [[ -z "${active}" ]]; then
		echo "(unset)"
	else
		echo "${active}"
	fi
}

get_installed(){
	if [[ $# -gt 1 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die -q "Invalid variant"
			fi
		else
			die -q "Invalid parameter"
		fi
		shift
	done

	local installed=$(load_config "${CONFIG_DIR}/installed" ${v})

	echo $(sort_list ${installed[@]})
}

### Registration action ##
describe_register(){
	echo "Register a new package with the eselect module (Internal use only)"
}

describe_register() {
	echo "<target>"
}

describe_register_options() {
	for v in ${VARIANTS[@]}; do
		echo "--${v} : Register a new package with ${v}"
	done
	echo "target : A fully qualified variant e.g."
	echo " :	wine-1.9.23, wine-vanilla-2.0, or wine-staging-2.1.1" 
}

do_register(){
	if [[ $# -lt 1 ]] || [[ $# -gt 3 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die -q "Invalid flag or variant"
			fi
		else
			local tgt="$1"
		fi
		shift
	done

	if [[ -z "${tgt}" ]]; then
		die -q "Target not specified"
	fi

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	if is_number "${tgt}"; then
		local tgts=($(get_installed ${v_arg}))
		tgt=${tgts[${tgt}-1]}
	fi

	if ! is_valid_target "${tgt}"; then
		die -q "Target does not exist"
	fi

	local list=$(get_installed ${v_arg})

	if ! has ${tgt} ${list}; then
		list=($(sort_list "${list} ${tgt}"))
		store_config "${CONFIG_DIR}/installed" ${v} "${list[@]}"
	fi
}

describe_deregister(){
	echo "Deregister a package with the eselect module (Internal use only)"
}

describe_deregister() {
	echo "<target>"
}

describe_deregister_options() {
	for v in ${VARIANTS[@]}; do
		echo "--${v} : Deregister a package with ${v}"
	done
	echo "--force : Forcibly remove a package"
	echo "target : A fully qualified variant e.g."
	echo " :	wine-1.9.23, wine-vanilla-2.0, or wine-staging-2.1.1" 
}

do_deregister(){
	if [[ $# -lt 1 ]] || [[ $# -gt 3 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"
	local force=false

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			elif [[ "${flag}" == "force" ]]; then
				force=true
			else
				die -q "Invalid variant"
			fi
		else
			local tgt="$1"
		fi
		shift
	done

	if [[ -z "${tgt}" ]]; then
		die -q "Target not specified"
	fi

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	if is_number "${tgt}"; then
		local tgts=($(get_installed ${v_arg}))
		tgt=${tgts[${tgt}-1]}
	fi

	if ! is_valid_target "${tgt}" && [[ ${force} == "false" ]]; then
		die -q "Target does not exist"
	fi

	local list=$(get_installed ${v_arg})

	if ! has ${tgt} ${list}; then
		die -q "${tgt} is not registered for ${v}"
	fi

	if [[ "${tgt}" == "$(get_active ${v_arg})" ]]; then
		do_unset ${v_arg}
	fi

	list=$(list_rm_item ${tgt} "${list}")
	store_config "${CONFIG_DIR}/installed" ${v} "${list}"
}

### list action ###

describe_list() {
	echo "List available wine versions"
}

describe_list_options() {
	for v in ${VARIANTS[@]}; do
		echo "--${v} : List the available 'wine-${v}'"
	done
}

do_list() {
	if [[ $# -gt 1 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die -q "Invalid variant"
			fi
		else
			die -q "Invalid parameter"
		fi
		shift
	done

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	write_list_start "Available wine${v_arg#-} versions:"
	local installed=($(get_installed ${v_arg}))
	local active=$(get_active ${v_arg})

	if [[ ${#installed} -eq 0 ]]; then
		unset installed
	else
		for (( i = 0; i < ${#installed[@]}; i++ )); do
			if [[ ${installed[i]} = ${active} ]]; then
				installed[i]=$(highlight_marker "${installed[i]}")
			fi
		done
	fi

	write_numbered_list -m "(none found)" "${installed[@]}"
}

### show action ###

describe_show() {
	echo "Show the active wine version"
}

describe_show_options() {
	for v in ${VARIANTS[@]}; do
		echo "--$v : Show the active 'wine-$v'"
	done
}

do_show() {
	if [[ $# -gt 1 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die -q "Invalid variant"
			fi
		else
			die -q "Invalid parameter"
		fi
		shift
	done

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	write_list_start "Active wine${v_arg#-} version:"
	local active=$(get_active ${v_arg})

	write_kv_list_entry "${active}" ""
	if [[ "${active}" != "(unset)" ]]; then
		are_symlinks_valid ${v_arg}
	fi
}

### unset action ###

describe_unset() {
	echo "Remove wine symlinks"
}

describe_unset_options() {
	for v in ${VARIANTS[@]}; do
		echo "--$v : Remove the 'wine-$v' symlinks"
	done
	echo "--all : Unset active wine and all variants"
}

do_unset() {
	if [[ $# -gt 1 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"
	local all=false

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			elif [[ "${flag}" == "all" ]]; then
				all=true
			else
				die -q "Invalid variant"
			fi
		else
			die -q "Invalid parameter"
		fi
		shift
	done

	# Run do_update for all variants
	if ${all}; then
		do_unset
		for v in ${VARIANTS[@]}; do
			do_unset "--${v}"
		done

		return 0
	fi

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	remove_symlinks ${v_arg} || die -q "Couldn't remove wine${v_arg#-} symlinks"

	store_config "${CONFIG_DIR}/active" "${v}" ""
}

### set action ###

describe_set() {
	echo "Set a new wine version"
}

describe_set_parameters() {
	echo "<target>"
}

describe_set_options() {
	for v in ${VARIANTS[@]}; do
		echo "--$v : Set only the 'wine-$v' symlinks"
	done
	echo "target : Target name or number (from 'list' action)"
}

do_set() {
	if [[ $# -lt 1 ]] || [[ $# -gt 2 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die -q "Invalid flag or variant"
			fi
		else
			local tgt="$1"
		fi
		shift
	done

	if [[ -z "${tgt}" ]]; then
		die -q "Target not specified"
	fi

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	if is_number "${tgt}"; then
		local tgts=($(get_installed ${v_arg}))
		tgt=${tgts[${tgt}-1]}
	fi

	if ! is_valid_target "${tgt}"; then
		die -q "Target does not exist"
	fi

	do_unset ${v_arg} || die -q "Failed to unset active target"
	set_symlinks ${v_arg} "${tgt}" || die -q "Couldn't set wine-${v_arg#-} symlinks"

	store_config "${CONFIG_DIR}/active" "${v}" "${tgt}"
}

### update action ###

describe_update() {
	echo "Set highest version installed active"
}

describe_update_options() {
	for v in ${VARIANTS[@]}; do
		echo "--$v : Update the 'wine-$v' symlinks"
	done
	echo "--all : Update main active wine and all variants"
	echo "--if-unset : Reuse currently selected version if it appears valid"
}

do_update() {
	if [[ $# -gt 3 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"
	local if_unset=false
	local all=false

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			elif [[ "${flag}" == "if-unset" ]]; then
				if_unset=true
			elif [[ "${flag}" == "all" ]]; then
				all=true
			else
				die -q "Invalid flag or variant"
			fi
		else
			die -q "Invalid parameter"
		fi
		shift
	done

	if [[ "${v}" != "wine" ]] && ${all}; then
		die -q "Either specify a specific variant, or all, but not both"
	fi

	# Run do_update for all variants
	if ${all}; then
		local unset_arg
		if ${if_unset}; then
			unset_arg="--if-unset"
		fi

		do_update ${unset_arg}
		for v in ${VARIANTS[@]}; do
			do_update "--${v}" ${unset_arg}
		done

		return 0
	fi

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	# Determine if set and valid
	# If so, return
	if ${if_unset}; then
		local active=$(get_active ${v_arg})
		if is_valid_target "${active}" && are_symlinks_valid ${v_arg}; then
			return 0
		fi
	fi

	local installed=($(get_installed ${v_arg}))
	if [[ ${#installed[@]} -eq 0 ]]; then
		write_warning_msg "Skipping wine${v_arg#-}. No registered targets found."
		return 0
	fi
	local tgt=${installed[-1]}

	do_set ${v_arg} "${tgt}" || die -q "Couldn't set new wine${v_arg#-} symlinks"
}


# lifted from fdo-mime.eclass
desktop_database_update() {
	if [[ -x "${EPREFIX}/usr/bin/update-desktop-database" ]]; then
#		echo "Updating desktop mime database ..."
		"${EPREFIX}/usr/bin/update-desktop-database" -q "${EPREFIX}/usr/share/applications" || die
	fi
}

# sort function for versions, to be used in a pipe
sort_versions() {
	local vsort="sort --version-sort"
	# Test if our sort supports the --version-sort option (posix does)
	${vsort} </dev/null &>/dev/null || vsort=sort

	# We sort versions as follows:
	# 1. Run sed to prepend the version string by the numeric version
	#      1.7.21 wine-1.7.21
	#      1.7.14 wine-compholio-1.7.14
	# 2. sort --version-sort
	# 3. Run sed again to remove the prepended keys from step 1.
	sed -e 's/^\(.\+-\)\([[:digit:].]*\)$/\2 &/' \
		| LC_ALL=C ${vsort} | sed 's/.* //'
}

# Takes a list of items and returns a sorted version
sort_list() {
	list=($@)
	if [[ ! -z "${list}" ]]; then
		for i in ${list[@]}; do
			echo "${i}"
		done | sort_versions
	fi
}

# Returns a list excluding the specified item
# list_rm_item [rm_this] [list]
list_rm_item() {
	if [[ $# -lt 2 ]]; then
		die "Not enough arguments"
	fi

	rm_this=$1
	shift
	list=($@)

	local i
	for i in ${!list[@]};do
	    if [ "${list[$i]}" == "${rm_this}" ]; then
	        unset list[$i]
	    fi 
	done

	echo ${list[@]}
}

remove_symlinks() {
	if [[ $# -gt 1 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die -q "Invalid flag or variant"
			fi
		else
			die -q "Invalid parameter"
		fi
		shift
	done

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	local symlink_vars=$(load_config "${CONFIG_DIR}/links/${v}" symlink_dirs)
	if [[ -z "${symlink_vars}" ]]; then
		die -q "Missing listing of configured symlinks"
	fi
	local var
	for var in ${symlink_vars[@]}; do
		local symlinks=$(load_config "${CONFIG_DIR}/links/${v}" ${var})
		local symlink
		if [[ -z "${symlinks}" ]]; then
			die -q "Missing listing of ${var} symlinks"
		fi
		for symlink in ${symlinks[@]}; do
			if [[ ! -L "${symlink}" ]]; then
				die -q "${symlink} is not a symlink."
			fi
			rm "${symlink}" || die "Failed to rm ${symlink}"
			
			# remove entry from config file
			symlinks=$(list_rm_item "${symlink}" "${symlinks}")
		done
		store_config "${CONFIG_DIR}/links/${v}" ${var} "${symlinks}"

		# remove set from config file
		symlink_vars=$(list_rm_item "${var}" "${symlink_vars}")

		store_config "${CONFIG_DIR}/links/${v}" symlink_dirs "${symlink_vars}"
	done

	# Remove active if it exists
	store_config "${CONFIG_DIR}/active" "${v}" ""

	desktop_database_update || die "Failed to update xorg desktop database"
}

set_symlinks() {
	if [[ $# -lt 1 ]] || [[ $# -gt 2 ]]; then
		die -q "Invalid number of parameters specified"
	fi

	local v="wine"

	while [[ $# -gt 0 ]]; do
		if [[ $1 == --* ]]; then
			local flag="${1#--}"
			if has "${flag}" ${VARIANTS[@]}; then
				v=${flag}
			else
				die -q "Invalid flag or variant"
			fi
		else
			local tgt="$1"
		fi
		shift
	done

	if [[ -z "${tgt}" ]]; then
		die -q "Target not specified"
	fi

	local v_arg
	if [[ ${v} != "wine" ]]; then
		v_arg="--${v}"
	fi

	if is_number "${tgt}"; then
		local tgts=($(get_installed ${v_arg}))
		tgt=${tgts[${tgt}-1]}
	fi

	if ! is_valid_target "${tgt}"; then
		die -q "Target does not exist"
	fi

	set_dir_env

	local link
	local links

	store_config "${CONFIG_DIR}/links/${v}" symlink_dirs "bin"
	store_config "${CONFIG_DIR}/links/${v}" "bin" ""
	for b in "${wine_bin}"/*; do
		link="${PREFIX}/usr/bin/${b##*/}${v_arg#-}"
		ln -s "${b}" "${link}"
		if [[ $? -ne 0 ]]; then
			write_warning_msg "Failed to set symlink from ${b} to ${link}"
			write_warning_msg "Cleaning up"
			remove_symlinks ${v_arg}
		fi
		links="${links} ${link}"
	done
	store_config "${CONFIG_DIR}/links/${v}" "bin" "${links}"

	links=""
	append_config "${CONFIG_DIR}/links/${v}" symlink_dirs "man"
	store_config "${CONFIG_DIR}/links/${v}" "man" ""
	for md in "${wine_man}"/*; do
		for m in "${md}"/*; do
			link="${PREFIX}/usr/share/man/${md##*/}/${m##*/}${v_arg#-}"
			ln -s "${m}" "${link}"
			if [[ $? -ne 0 ]]; then
				write_warning_msg "Failed to set symlink from ${m} to ${link}"
				write_warning_msg "Cleaning up"
				remove_symlinks ${v_arg}
			fi
			links="${links} ${link}"
		done
	done
	append_config "${CONFIG_DIR}/links/${v}" "man" "${links}"

	unset_dir_env

	desktop_database_update || die "Failed to update xorg desktop database"
}

# set env vars for us to work with
set_dir_env() {
	wine_bin="${EPREFIX}/usr/lib/${tgt}/bin"
	wine_include="${EPREFIX}/usr/include/${tgt}/wine"
	wine_share="${EPREFIX}/usr/share/${tgt}"
	wine_app="${wine_share}/applications"
	wine_man="${wine_share}/man"
}

# unset our env vars
unset_dir_env() {
	unset wine_{bin,include,share,app,man}
}