1 files changed, 125 insertions, 0 deletions
diff --git a/wine.eselect b/wine.eselect
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index 0000000..c327f3c
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+++ b/wine.eselect
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+# -*-eselect-*-  vim: ft=eselect
+# Copyright 2005-2014 Gentoo Foundation
+# Distributed under the terms of the GNU GPL version 2 or later
+
+DESCRIPTION="Manage the /usr/src/linux symlink"
+MAINTAINER="eselect@gentoo.org"
+
+# sort function for kernel versions, to be used in a pipe
+sort_kernel_versions() {
+	local vsort="sort --version-sort"
+	# Test if our sort supports the --version-sort option
+	# (should be GNU sort, since the kernel module is GNU/Linux specific)
+	${vsort} </dev/null &>/dev/null || vsort=sort
+
+	# We sort kernel versions as follows:
+	# 1. Run sed to prepend the version string by the numeric version
+	#    and an additional rank indicator that is 0 for release candidates
+	#    or 1 otherwise. After this step we have, for example:
+	#      2.6.29 1 linux-2.6.29
+	#      2.6.29 0 linux-2.6.29-rc8
+	# 2. sort --version-sort
+	# 3. Run sed again to remove the prepended keys from step 1.
+	sed -e 's/^\(linux-\)\?\([[:digit:].]\+\)[-_]rc/\2 0 &/' \
+		-e 't;s/^\(linux-\)\?\([[:digit:].]\+\)/\2 1 &/' \
+		| LC_ALL=C ${vsort} | sed 's/.* //'
+}
+
+# find a list of kernel symlink targets
+find_targets() {
+	local f
+	for f in "${EROOT}"/usr/src/linux-*; do
+		[[ -f ${f}/Makefile && -f ${f}/Kconfig ]] && basename "${f}"
+	done | sort_kernel_versions
+}
+
+# remove the kernel symlink
+remove_symlink() {
+	rm "${EROOT}/usr/src/linux"
+}
+
+# set the kernel symlink
+set_symlink() {
+	local target=$1
+
+	if is_number "${target}"; then
+		local targets=( $(find_targets) )
+		target=${targets[target-1]}
+	fi
+
+	if [[ -z ${target} ]]; then
+		die -q "Target \"$1\" doesn't appear to be valid!"
+	elif [[ -f ${EROOT}/usr/src/${target}/Makefile ]]; then
+		ln -s "${target}" "${EROOT}/usr/src/linux"
+	elif [[ -f ${EROOT}/usr/src/linux-${target}/Makefile ]]; then
+		ln -s "linux-${target}" "${EROOT}/usr/src/linux"
+	else
+		die -q "Target \"$1\" doesn't appear to be valid!"
+	fi
+}
+
+### show action ###
+
+describe_show() {
+	echo "Show the current kernel symlink"
+}
+
+do_show() {
+	write_list_start "Current kernel symlink:"
+	if [[ -L ${EROOT}/usr/src/linux ]]; then
+		local kernel=$(canonicalise "${EROOT}/usr/src/linux")
+		write_kv_list_entry "${kernel%/}" ""
+		[[ -f ${kernel}/Makefile ]] \
+			|| write_warning_msg "Symlink target doesn't appear to be valid!"
+	else
+		write_kv_list_entry "(unset)" ""
+	fi
+}
+
+### list action ###
+
+describe_list() {
+	echo "List available kernel symlink targets"
+}
+
+do_list() {
+	local i targets=( $(find_targets) )
+
+	write_list_start "Available kernel symlink targets:"
+	for (( i = 0; i < ${#targets[@]}; i++ )); do
+		[[ ${targets[i]} = \
+			$(basename "$(canonicalise "${EROOT}/usr/src/linux")") ]] \
+			&& targets[i]=$(highlight_marker "${targets[i]}")
+	done
+	write_numbered_list -m "(none found)" "${targets[@]}"
+}
+
+### set action ###
+
+describe_set() {
+	echo "Set a new kernel symlink target"
+}
+
+describe_set_parameters() {
+	echo "<target>"
+}
+
+describe_set_options() {
+	echo "target : Target name or number (from 'list' action)"
+}
+
+do_set() {
+	[[ -z $1 ]] && die -q "You didn't tell me what to set the symlink to"
+	[[ $# -gt 1 ]] && die -q "Too many parameters"
+
+	if [[ -L ${EROOT}/usr/src/linux ]]; then
+		# existing symlink
+		remove_symlink || die -q "Couldn't remove existing symlink"
+		set_symlink "$1" || die -q "Couldn't set a new symlink"
+	elif [[ -e ${EROOT}/usr/src/linux ]]; then
+		# we have something strange
+		die -q "${EROOT}/usr/src/linux exists but is not a symlink"
+	else
+		set_symlink "$1" || die -q "Couldn't set a new symlink"
+	fi
+}