opkg-utils: Add support for pigz

Support explicit use of pigz when compressing the package contents by
setting:

 OPKGBUILDCMD = "opkg-build -Z pigz"

(From OE-Core rev: 631e7bb7d02ca9cb9cb66e6b8395b197525cda55)

Signed-off-by: Mike Crowe <mac@mcrowe.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/opkg-utils/opkg-utils/pigz.patch

@@ -0,0 +1,51 @@
+From ab1436927b47badcd219a5f075dfc848020e061d Mon Sep 17 00:00:00 2001
+From: Mike Crowe <mac@mcrowe.com>
+Date: Thu, 4 Oct 2018 17:54:19 +0100
+Subject: [opkg-utils PATCH] opkg-build: Add support for explicit use of pigz
+To: opkg-devel@googlegroups.com,
+    yocto@yoctoproject.org
+
+oe-core has stopped[1] installing pigz as gzip. This means that in
+order to persuade opkg-build to use pigz it must be specified
+explicitly. Let's teach opkg-build to deal with being passed pigz as a
+compressor.
+
+We can't combine the check for whether -T is required with the one for
+gzip because opkg-build needs to call $compressor and gzip separately
+to construct the package.
+
+[1] http://lists.openembedded.org/pipermail/openembedded-commits/2018-February/218767.html
+
+Upstream-Status: Submitted [opkg-devel@googlegroups.com https://groups.google.com/forum/#!topic/opkg-devel/E0WVOhjK61w]
+Signed-off-by: Mike Crowe <mac@mcrowe.com>
+---
+ opkg-build | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/opkg-build b/opkg-build
+index 93a7956..f8403ea 100755
+--- a/opkg-build
++++ b/opkg-build
+@@ -170,7 +170,7 @@ fi
+ 
+ compressor_ext() {
+     case $1 in
+-	gzip)
++	gzip|pigz)
+ 	    echo gz
+ 	    ;;
+ 	bzip2)
+@@ -232,6 +232,10 @@ if [ $compressor = "gzip" ] ; then
+ 	compressorargs=$zipargs
+ elif [ $compressor = "xz" ] ; then
+ 	compressorargs="--threads 0"
++elif [ $compressor = "pigz" ] ; then
++	if $compressor --help 2>&1 | grep -- "-T" > /dev/null; then
++		compressorargs="-9nT"
++	fi
+ fi
+ 
+ tsortargs=
+-- 
+2.11.0
+

meta/recipes-devtools/opkg-utils/opkg-utils_0.3.6.bb

@@ -12,6 +12,7 @@ SRC_URI = "http://git.yoctoproject.org/cgit/cgit.cgi/${BPN}/snapshot/${BPN}-${PV
            file://0001-Only-use-sort-name-on-versions-of-tar-which-support-.patch \
            file://0002-opkg-build-Use-local-time-for-build_date-since-opkg-.patch \
            file://threaded-xz.patch \
+           file://pigz.patch \
 "
 SRC_URI_append_class-native = " file://tar_ignore_error.patch"
 UPSTREAM_CHECK_URI = "http://git.yoctoproject.org/cgit/cgit.cgi/opkg-utils/refs/"