[gentoo-dev] [PATCH 12/15] unpacker.eclass: decompress xz in parallel

["Michał Górny" <mgorny@gentoo.org>]

From: Sam James <sam@gentoo.org>

>= xz 5.3.3_alpha supports parallel decompression, so let's use it.

As recently added to Portage (see https://github.com/gentoo/portage/commit/48d107e5c1a103d59a053aebeefa9a5aac5c32ff).

Signed-off-by: Sam James <sam@gentoo.org>
---
 eclass/unpacker.eclass | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/eclass/unpacker.eclass b/eclass/unpacker.eclass
index 70a46ac19709..d96b56609869 100644
--- a/eclass/unpacker.eclass
+++ b/eclass/unpacker.eclass
@@ -23,7 +23,7 @@ esac
 if [[ -z ${_UNPACKER_ECLASS} ]]; then
 _UNPACKER_ECLASS=1
 
-inherit toolchain-funcs
+inherit multiprocessing toolchain-funcs
 
 # @ECLASS_VARIABLE: UNPACKER_BZ2
 # @USER_VARIABLE
@@ -395,7 +395,7 @@ _unpacker_get_decompressor() {
 	*.z|*.gz|*.tgz)
 		echo "gzip -dc" ;;
 	*.lzma|*.xz|*.txz)
-		echo "xz -dc" ;;
+		echo "xz -T$(makeopts_jobs) -dc" ;;
 	*.lz)
 		: ${UNPACKER_LZIP:=$(type -P plzip || type -P pdlzip || type -P lzip)}
 		echo "${UNPACKER_LZIP} -dc" ;;
-- 
2.37.3