Index: Mk/bsd.sites.mk
===================================================================
--- Mk/bsd.sites.mk	(revision 380770)
+++ Mk/bsd.sites.mk	(working copy)
@@ -546,6 +546,48 @@
 .endif
 .endif
 
+#
+# In order to use subversion repository your port must define USE_SVNREPO and
+# the following variables, along with PORTNAME and PORTVERSION:
+#
+# SVNREPO_URL   - URL of the subversion repository, including the branch part
+#                 default: not set, mandatory
+#
+# SVNREPO_REV   - revision number to check out
+#                 default: not set, mandatory
+#
+
+.if defined(USE_SVNREPO)
+FETCH_DEPENDS=    svn:${PORTSDIR}/devel/subversion
+do-fetch:
+	@${MKDIR} ${_DISTDIR}
+	@file=${PORTNAME}-${PORTVERSION}${EXTRACT_SUFX}; \
+	if [ ! -f ${_DISTDIR}/$$file ]; then \
+		if [ -f ${DISTINFO_FILE} -a "x${NO_CHECKSUM}" = "x" ]; then \
+			_sha256sum=`alg=SHA256; ${DISTINFO_DATA}`; \
+			if [ -z "$$_sha256sum" ]; then \
+				${ECHO_MSG} "=> $${DIR:+$$DIR/}$$file is not in ${DISTINFO_FILE}."; \
+				${ECHO_MSG} "=> Either ${DISTINFO_FILE} is out of date, or"; \
+				${ECHO_MSG} "=> $${DIR:+$$DIR/}$$file is spelled incorrectly."; \
+				exit 1; \
+			fi; \
+		fi; \
+		${ECHO_MSG} "=> $$file doesn't seem to exist in ${_DISTDIR}."; \
+		if [ ! -w ${_DISTDIR} ]; then \
+		   ${ECHO_MSG} "=> ${_DISTDIR} is not writable by you; cannot fetch."; \
+		   exit 1; \
+		fi; \
+		cd ${_DISTDIR} && \
+		    ${RM} -rf ${PORTNAME}-${PORTVERSION} && \
+		    ${ECHO_MSG} "=> checking out subversion repository ${SVNREPO_URL}, revision ${SVNREPO_REV}"; \
+		    svn export -q -r ${SVNREPO_REV} ${SVNREPO_URL} ${PORTNAME}-${PORTVERSION} && \
+		    ${FIND} ${PORTNAME}-${PORTVERSION} -and -exec ${TOUCH} -h -d 1970-01-01T00:00:00Z {} \; && \
+		    ${FIND} ${PORTNAME}-${PORTVERSION} -print0 | sort -z | \
+		        ${TAR} czf ${PORTNAME}-${PORTVERSION}${EXTRACT_SUFX} --options gzip:!timestamp --no-recursion --null -T - && \
+		    ${RM} -rf ${PORTNAME}-${PORTVERSION}; \
+	fi;
+.endif
+
 .if !defined(IGNORE_MASTER_SITE_GNOME)
 MASTER_SITE_GNOME+= \
 	https://download.gnome.org/%SUBDIR%/ \