From 908af511f92435e9062036009b1ef02cba06cf5e Mon Sep 17 00:00:00 2001
From: Juan RP <xtraeme@gmail.com>
Date: Sun, 2 Mar 2014 12:26:24 +0100
Subject: [PATCH] common/hooks: new hook to generate 32bit pkgs for x86_64
 (WIP).

---
 common/hooks/post-install/06-prepare-32bit.sh | 78 +++++++++++++++++++
 common/hooks/post-pkg/00-register-pkg.sh      | 12 ++-
 common/hooks/pre-pkg/00-gen-pkg.sh            |  8 ++
 3 files changed, 97 insertions(+), 1 deletion(-)
 create mode 100644 common/hooks/post-install/06-prepare-32bit.sh

diff --git a/common/hooks/post-install/06-prepare-32bit.sh b/common/hooks/post-install/06-prepare-32bit.sh
new file mode 100644
index 00000000000..c7bbcc985a3
--- /dev/null
+++ b/common/hooks/post-install/06-prepare-32bit.sh
@@ -0,0 +1,78 @@
+# This hook creates a new PKGDESTDIR with 32bit libraries for x86_64.
+#
+# XXX remaining issues:
+#	- Conditionalized for now with "lib32" template var.
+#	- due to ${pkgname} -> ${pkgname}32 renaming, some pkgs have wrong deps
+#	  (noarch pkgs, dependencies without shlibs).
+
+hook() {
+	local destdir32=${XBPS_DESTDIR}/${pkgname}32-${version}
+
+	if [ -z "$lib32" ]; then
+		return
+	fi
+	# This hook will only work when building for x86.
+	if [ "$XBPS_MACHINE" != "i686" ]; then
+		return
+	fi 
+	# Ignore noarch pkgs.
+	if [ -n "$noarch" ]; then
+		return
+	fi
+	# If /usr/lib does not exist don't continue...
+	if [ ! -d ${PKGDESTDIR}/usr/lib ]; then
+		return
+	fi
+	mkdir -p ${destdir32}/usr/lib32
+	cp -a ${PKGDESTDIR}/usr/lib/* ${destdir32}/usr/lib32
+
+	# Only keep shared libs, static libs, and pkg-config files.
+	find "${destdir32}" -not \( \
+		-name '*.pc' -or \
+		-name '*.so' -or \
+		-name '*.so.*' -or \
+		-name '*.a' -or \
+		-name '*.la' -or \
+		-type d \
+	\) -delete
+
+	# Remove empty dirs.
+	for f in $(find ${destdir32} -type d -empty|sort -r); do
+		_dir="${f##${destdir32}}"
+		[ -z "${_dir}" ] && continue
+		rmdir --ignore-fail-on-non-empty -p "$f" &>/dev/null
+	done
+
+	# Switch pkg-config files to lib32.
+	if [ -d ${destdir32}/usr/lib32/pkgconfig ]; then
+		sed -e 's,/usr/lib,/usr/lib32,g' \
+		    -e 's,${exec_prefix}/lib,${exec_prefix}/lib32,g' \
+		    -i ${destdir32}/usr/lib32/pkgconfig/*.pc
+	fi
+
+	# If the rdeps file exist (runtime deps), copy and then modify it for
+	# 32bit dependencies.
+	trap - ERR
+
+	if [ -s "$PKGDESTDIR/rdeps" ]; then
+		: > $destdir32/rdeps
+		for f in $(cat ${PKGDESTDIR}/rdeps); do
+			pkgn="$($XBPS_UHELPER_CMD getpkgdepname $f)"
+			if [ -z "${pkgn}" ]; then
+				pkgn="$($XBPS_UHELPER_CMD getpkgname $f)"
+				if [ -z "${pkgn}" ]; then
+					msg_error "$pkgver: invalid dependency $f\n"
+				fi
+				pkgv="$($XBPS_UHELPER_CMD getpkgversion ${f})"
+			else
+				pkgv="$($XBPS_UHELPER_CMD getpkgdepversion ${f})"
+			fi
+			echo "${pkgn}32${pkgv}" >> $destdir32/rdeps
+		done
+	fi
+
+	# If it's a development pkg add a dependency to the 64bit pkg.
+	if [[ $pkgname =~ '-devel' ]]; then
+		echo "${pkgver}" >> $destdir32/rdeps
+	fi
+}
diff --git a/common/hooks/post-pkg/00-register-pkg.sh b/common/hooks/post-pkg/00-register-pkg.sh
index cbe0f6a8549..5ccb6ce44bc 100644
--- a/common/hooks/post-pkg/00-register-pkg.sh
+++ b/common/hooks/post-pkg/00-register-pkg.sh
@@ -1,12 +1,15 @@
 # This hook registers a XBPS binary package into the specified local repository.
 
 registerpkg() {
-	local repo="$1" pkg="$2"
+	local repo="$1" pkg="$2" arch="$3"
 
 	if [ ! -f ${repo}/${pkg} ]; then
 		msg_error "Unexistent binary package ${repo}/${pkg}!\n"
 	fi
 
+	if [ -n "${arch}" ]; then
+		export XBPS_TARGET_ARCH=${arch}
+	fi
 	msg_normal "Registering ${pkg} into ${repo} ...\n"
 
 	if [ -n "$XBPS_CROSS_BUILD" ]; then
@@ -14,6 +17,7 @@ registerpkg() {
 	else
 		$XBPS_RINDEX_CMD ${XBPS_BUILD_FORCEMODE:+-f} -a ${repo}/${pkg}
 	fi
+	unset XBPS_TARGET_ARCH
 }
 
 hook() {
@@ -35,6 +39,7 @@ hook() {
 		pkgdir=$XBPS_REPOSITORY
 	fi
 	binpkg=${pkgver}.${arch}.xbps
+	binpkg32=${pkgname}32-${version}_${revision}.x86_64.xbps
 	binpkg_dbg=${pkgname}-dbg-${version}_${revision}.${arch}.xbps
 
 	# Register binpkg.
@@ -46,4 +51,9 @@ hook() {
 	if [ -f ${pkgdir}/${binpkg_dbg} ]; then
 		registerpkg ${pkgdir} ${binpkg_dbg}
 	fi
+
+	# Register 32bit binpkg if it exists.
+	if [ -f ${pkgdir}/${binpkg32} ]; then
+		registerpkg ${pkgdir} ${binpkg32} x86_64
+	fi
 }
diff --git a/common/hooks/pre-pkg/00-gen-pkg.sh b/common/hooks/pre-pkg/00-gen-pkg.sh
index f6e41a0a5ba..88c24bab14a 100644
--- a/common/hooks/pre-pkg/00-gen-pkg.sh
+++ b/common/hooks/pre-pkg/00-gen-pkg.sh
@@ -143,4 +143,12 @@ hook() {
 		PKGDESTDIR="${XBPS_DESTDIR}/${XBPS_CROSS_TRIPLET}/${pkgname}-dbg-${version}"
 		genpkg ${repo} ${arch} "${_desc}" ${_pkgver} ${binpkg}
 	fi
+	# Generate 32bit pkg.
+	if [ -d "${XBPS_DESTDIR}/${pkgname}32-${version}" ]; then
+		_pkgver=${pkgname}32-${version}_${revision}
+		_desc="${short_desc} (32bit)"
+		binpkg=${_pkgver}.x86_64.xbps
+		PKGDESTDIR="${XBPS_DESTDIR}/${pkgname}32-${version}"
+		genpkg ${repo} x86_64 "${_desc}" ${_pkgver} ${binpkg}
+	fi
 }