graphics/rubygem-ruby-vips: Add x11 and nox11 flavors

graphics/rubygem-ruby-vips/Makefile

@@ -10,7 +10,7 @@ WWW=		https://github.com/libvips/ruby-vips
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
-LIB_DEPENDS=	libvips.so:graphics/vips
+LIB_DEPENDS=	libvips.so:graphics/vips@${FLAVOR}
 RUN_DEPENDS=	rubygem-ffi>=1.12<2:devel/rubygem-ffi \
 		rubygem-logger>=0:devel/rubygem-logger
 
@@ -19,6 +19,10 @@ USE_GNOME=	glib20
 
 NO_ARCH=	yes
 
+FLAVORS=	x11 nox11
+FLAVOR?=	${FLAVORS:[1]}
+nox11_PKGNAMESUFFIX=	-nox11
+
 SHEBANG_FILES=	example/*.rb
 
 .include <bsd.port.mk>