From fa27c26198160cad1f0debf752ba3a6e1b003dad Mon Sep 17 00:00:00 2001
From: "Aaron W. Swenson" <titanofold@gentoo.org>
Date: Sun, 20 Jan 2013 23:39:42 +0000
Subject: Use relative paths instead of absolute paths. Fix bug 321114.

---
 postgresql.eselect | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/postgresql.eselect b/postgresql.eselect
index 6b1591e..7e97ed8 100644
--- a/postgresql.eselect
+++ b/postgresql.eselect
@@ -47,6 +47,7 @@ linker() {
 	local suffix=$4
 	local link_source
 	local findings
+	local rel_source
 
 	# Prevent passed patterns from being globbed
 	# If this module is run in /usr, '-name lib*' ends up globbing 'lib*',
@@ -64,8 +65,11 @@ linker() {
 		[[ -e ${link_target} ]] && \
 			die -q "The target '${link_target}' still exists and could not be removed!"
 
-		ln -s "${link_source}" "${link_target}" || die -q "Unable to create link!"
-		echo "${link_target}" >> "${E_PATH}"/active.links${suffix}
+		# Create relative links so that they work both here and inside the new
+		# root if $ROOT is not "/".
+		rel_source=$(relative_name "${link_source}" "${target_dir}")
+		ln -s "${rel_source}" "${link_target}" || die -q "Unable to create link!"
+		echo "${link_target##${ROOT%/}/}" >> "${E_PATH}"/active.links${suffix}
 	done
 }
 
@@ -77,8 +81,9 @@ unlinker() {
 	if [[ -r ${active_link_file} ]] ; then
 		local active_links=($(<"${active_link_file}"))
 		for (( i=0; $i < ${#active_links[@]}; i++ )) ; do
-			[[ -h ${active_links[$i]} ]] && rm -f "${active_links[$i]}"
-			[[ -e ${active_links[$i]} ]] && \
+			[[ -h "${ROOT%/}/${active_links[$i]}" ]] && \
+				rm -f "${ROOT%/}/${active_links[$i]}"
+			[[ -e "${ROOT%/}/${active_links[$i]}" ]] && \
 				die -q "The target '${active_links[$i]}' still exists and could not be removed!"
 		done
 
@@ -178,7 +183,9 @@ do_set() {
 		"${B_PATH}"/include/libpq
 		"${B_PATH}"/include/postgres_ext.h
 	)
+
 	# The linker function cannot accomadate this special purpose.
+	local rel_source
 	local i
 	for (( i=0; $i < ${#sources[@]}; i++ )) ; do
 		# Remove target before creating the symlink
@@ -188,8 +195,12 @@ do_set() {
 		[[ -e ${targets[$i]} ]] && \
 			die -q "The target '${targets[$i]}' exists and could not be removed!"
 
-		ln -s "${sources[$i]}" "${targets[$i]}" || die -q "Unable to create link!"
-		echo "${targets[$i]}" >> "${E_PATH}"/active.links
+		# Create relative links so that they work both here and inside the new
+		# root if $ROOT is not "/"
+		rel_source=$(relative_name "${sources[$i]}" "$(dirname "${target[$i]}")")
+
+		ln -s "$rel_source" "${targets[$i]}" || die -q "Unable to create link!"
+		echo "${targets[$i]##${ROOT%/}/}" >> "${E_PATH}"/active.links
 	done
 
 	# Link modules to /usr/lib{,32,64}/
@@ -197,9 +208,10 @@ do_set() {
 	for x in $(list_libdirs) ; do
 		if [[ -d ${B_PATH}/${x}/postgresql-${SLOT}/${x} ]] ; then
 			# 'linker' function doesn't work for linking directories.
-			# Default lib path
-			ln -s "${B_PATH}/${x}/postgresql-${SLOT}/${x}" "${B_PATH}/${x}/postgresql"
-			echo "${B_PATH}/${x}/postgresql" >> "${E_PATH}"/active.links
+			# Default lib path - create a relative link
+			ln -s "postgresql-${SLOT}/${x}" "${B_PATH}/${x}/postgresql"
+			echo "${B_PATH##${ROOT%/}/}/${x}/postgresql" >> \
+				"${E_PATH}"/active.links
 			# Linker works for files
 			linker "${B_PATH}/${x}/postgresql-${SLOT}/${x}/" \
 				"-name lib*" "${B_PATH}/${x}"
@@ -210,9 +222,10 @@ do_set() {
 	linker "${B_PATH}/$(lib_dir)/postgresql-${SLOT}/bin/" \
 		"-type f" "${B_PATH}/bin"
 
-	# Default share path
-	ln -s "${B_PATH}/share/postgresql-${SLOT}" "${B_PATH}/share/postgresql"
-	echo "${B_PATH}/share/postgresql" >> "${E_PATH}/active.links"
+	# Default share path - use a relative link here by just specifying the
+	# base name
+	ln -s "postgresql-${SLOT}" "${B_PATH}/share/postgresql"
+	echo "${B_PATH##${ROOT%/}/}/share/postgresql" >> "${E_PATH}/active.links"
 
 	echo ${SLOT} > "${E_PATH}/active"
 	echo "done."
-- 
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