epm play: add XnViewMP support

prescription.d/xnview.sh

+#!/bin/sh
+
+# TODO: common place
+fatal()
+{
+    echo "FATAL: $*" >&2
+    exit 1
+}
+
+PKGNAME=XnViewMP
+
+if [ "$1" = "--remove" ] ; then
+    epm remove $PKGNAME
+    exit
+fi
+
+[ "$1" != "--run" ] && echo "XnView MP: Image management from the official site" && exit
+
+repack='--repack'
+arch=$($DISTRVENDOR --distro-arch)
+case $arch in
+    x86_64|amd64)
+        ;;
+    *)
+        fatal "Unsupported arch $arch for $($DISTRVENDOR -d)"
+esac
+
+epm install https://download.xnview.com/XnViewMP-linux-x64.deb

repack.d/xnview.sh

+#!/bin/sh -x
+# It will run with two args: buildroot spec
+BUILDROOT="$1"
+
+SPEC="$2"
+
+ln -s /lib64/libbz2.so.1 $BUILDROOT/opt/XnView/lib/libbz2.so.1.0
+
+subst "s|%files|%files\n/opt/XnView/lib/libbz2.so.1.0|" $SPEC
+
+#subst '1Requires:bzlib' $SPEC
+subst '1iAutoReq:yes,noperl' $SPEC
+subst '1iAutoProv:no' $SPEC
+
+# ignore embedded libs
+for i in libQt5 libav libcrypto.so libdbus-1.so libicu liblibraw.so libssl.so libswresample libswscale libva libvdpau ; do
+    subst "1i%filter_from_requires /^$i.*/d" $SPEC
+done
+
+epm install --skip-installed bzlib fontconfig libalsa libcairo libcups libdrm libfreetype /usr/bin/perl zlib libXv glib2 libatk libcairo-gobject libEGL libgdk-pixbuf libgio libGL libgst-plugins1.0 libgstreamer1.0 libgtk+2 libgtk+3 libhalf12 libiex12 libilmthread12 libpango libpulseaudio libsqlite3 libwebp7 libX11 libxcb libxcb-render-util libXcomposite libXext libXfixes libxkbcommon libxkbcommon-x11 libXrender
+