support for CONFIGURE_STYLE "ruby gem"

with msf's consent

lang/ruby/ruby.port.mk

@@ -1,4 +1,4 @@
-# $OpenBSD: ruby.port.mk,v 1.3 2006/06/11 18:57:11 sturm Exp $
+# $OpenBSD: ruby.port.mk,v 1.4 2006/06/11 19:56:31 sturm Exp $
 
 # ruby module
 
@@ -22,7 +22,50 @@ REV=1.8
 SUB=${MACHINE_ARCH:S/amd64/x86_64/}-openbsd${OSREV}
 SUBST_VARS=SUB REV
 
-.if ${CONFIGURE_STYLE:L:Msetup}
+.if ${CONFIGURE_STYLE:L:Mgem}
+EXTRACT_SUFX=	.gem
+EXTRACT_ONLY=
+
+BUILD_DEPENDS+=	::devel/ruby-gems
+NO_BUILD=	Yes
+
+SUBST_VARS+=	DISTNAME
+
+GEM=		${LOCALBASE}/bin/gem
+GEM_BASE=	${PREFIX}/lib/ruby/gems/${REV}
+GEM_FLAGS=	--local --rdoc --no-force
+
+.  if !target(do-regress)
+# XXX gem errors out w/o unit tests to run and I have not found any gem
+# which actually supports tests
+NO_REGRESS=	Yes
+
+# a generic regress target might look sth like this
+#do-regress:
+#	@if [ ! -d ${WRKINST} ]; then \
+#		_CLEAN_FAKE=Yes; \
+#	fi; \
+#	mkdir -p ${WRKINST}${GEM_BASE}; \
+#	${SUDO} ${GEM} install ${GEM_FLAGS} --test \
+#		--install-dir ${WRKINST}${GEM_BASE} \
+#		${FULLDISTDIR}/${DISTFILES}; \
+#	if [ ! -z "$$_CLEAN_FAKE" ]; then \
+#		${SUDO} rm -fr ${WRKINST}; \
+#	fi
+.  endif
+.  if !target(do-install)
+do-install:
+	@${INSTALL_DATA_DIR} ${GEM_BASE}
+	@${SUDO} ${GEM} install ${GEM_FLAGS} --install-dir ${GEM_BASE} \
+		${FULLDISTDIR}/${DISTNAME}${EXTRACT_SUFX}
+	@if [ -d ${GEM_BASE}/bin ]; then \
+		for f in ${GEM_BASE}/bin/*; do \
+			mv $$f ${PREFIX}/bin; \
+		done; \
+		rm -r ${GEM_BASE}/bin; \
+	fi
+.  endif
+.elif ${CONFIGURE_STYLE:L:Msetup}
 MODRUBY_configure= \
 	cd ${WRKSRC}; ${SETENV} ${CONFIGURE_ENV} ${RUBY} setup.rb config \
 		--prefix=${PREFIX} ${CONFIGURE_ARGS};