Index: svnbranch.awk
===================================================================
--- svnbranch.awk	(revision 0)
+++ svnbranch.awk	(revision 0)
@@ -0,0 +1,26 @@
+BEGIN {
+	FS = "_"
+}
+
+/RELENG_.*_RELEASE/ {
+	if (NF == 5) {
+		printf "release/%s.%s.%s", $2, $3, $4
+		exit
+	}
+}
+
+/RELENG_.*/ {
+	if (NF == 3) {
+		printf "releng/%s.%s", $2, $3
+		exit
+	}
+
+	if (NF == 2) {
+		printf "stable/%s", $2
+		exit
+	}
+}
+
+// {
+	printf "unknown_branch"
+}

Property changes on: svnbranch.awk
___________________________________________________________________
Added: svn:mime-type
   + text/plain
Added: svn:keywords
   + FreeBSD=%H
Added: svn:eol-style
   + native

Index: Makefile
===================================================================
--- Makefile	(revision 194956)
+++ Makefile	(working copy)
@@ -1,7 +1,8 @@
 # $FreeBSD$
 #
 # make release [BUILDNAME=somename] CHROOTDIR=/some/dir CVSROOT=/cvs/dir \
-#     [RELEASETAG=tag]
+#     [RELEASETAG=tag] [SVNROOT=svn://svn.freebsd.org/base] \
+#     [SVNBRANCH=some/branch]
 #
 # Where "/some/dir" is the pathname of a directory on a some filesystem with
 # at least 1000MB of free space, "somename" is what you want the release to
@@ -45,12 +46,25 @@
 # To add other options to the CVS command, set
 #CVSARGS="-lfq"
 #
-# To prefix the cvs command
+# To prefix the CVS command
 #CVSPREFIX="/usr/bin/time"
 #
 # Where the CVS repository is
 #CVSROOT="/home/ncvs"
 #
+# To add other options to the Subversion subcommands (co,up), set
+#SVNCMDARGS="-r '{ 01/01/2002 00:00:00 UTC }'"
+#
+# To prefix the Subversion command
+#SVNPREFIX="/usr/bin/time"
+#
+# Where the Subversion repository is
+#SVNROOT=svn://svn.freebsd.org/base
+#
+# Subversion branch to build for src.  If this is not set then it is
+# automatically computed from RELEASETAG.
+#SVNBRANCH=stable/7
+#
 # Non-zero if ${RELEASETAG} is in the form "RELENG_ver_RELEASE"; we
 # are building an official release.  Otherwise, we are building for
 # a branch.
@@ -64,6 +78,16 @@
 .endif
 .endif
 
+# Determine the Subversion source branch that corresponds to the requested
+# RELEASETAG.
+.if !defined(SVNBRANCH)
+.if defined(RELEASETAG)
+SVNBRANCH|=	echo "${RELEASETAG}" | awk -f ${.CURDIR}/svnbranch.awk
+.else
+SVNBRANCH=	head
+.endif
+.endif
+
 # If you want to pass flags to the world build such as -j X, use
 # WORLD_FLAGS.  Similarly, you can specify make flags for kernel
 # builds via KERNEL_FLAGS.
@@ -344,9 +368,18 @@
 WORLDDIR?=	${.CURDIR}/..
 
 release rerelease:
-.if !defined(CHROOTDIR) || !defined(BUILDNAME) || !defined(CVSROOT)
-	@echo "To make a release you must set CHROOTDIR, BUILDNAME and CVSROOT" && false
+.if !defined(CHROOTDIR) || !defined(BUILDNAME)
+	@echo "To make a release you must set CHROOTDIR and BUILDNAME" && false
 .endif
+.if !defined(NOPORTSATALL) && !defined(EXTPORTSDIR) && !defined(CVSROOT)
+	@echo "Building ports requires CVSROOT or EXTPORTSDIR"
+.endif
+.if !defined(NODOC) && !defined(EXTDOCDIR) && !defined(CVSROOT)
+	@echo "Building docs requires CVSROOT or EXTDOCDIR"
+.endif
+.if !defined(EXTSRCDIR) && !defined(CVSROOT) && !defined(SVNROOT)
+	@echo "The source tree requires SVNROOT, CVSROOT, or EXTSRCDIR"
+.endif
 .if defined(NOPORTSATALL) && !defined(NODOC)
 	@echo "Ports are required for building the docs.  Either set NODOC or"
 	@echo "unset NOPORTS, or set at least DOMINIMALDOCPORTS to YES!"
@@ -390,6 +423,10 @@
 .if defined(EXTSRCDIR)
 	cd ${CHROOTDIR}/usr && \
 	    cp -R -H ${EXTSRCDIR} src
+.elif defined(SVNROOT)
+	cd ${CHROOTDIR}/usr && \
+	    ${SVNPREFIX} svn co ${SVNCMDARGS} ${SVNROOT}/${SVNBRANCH} \
+	    ${RELEASESRCMODULE} 
 .else
 	cd ${CHROOTDIR}/usr && \
 	    ${CVSPREFIX} cvs -R ${CVSARGS} -d ${CVSROOT} \
@@ -435,7 +472,10 @@
 .endif
 .if make(rerelease)
 .if !defined(RELEASENOUPDATE) && !defined(EXTSRCDIR)
-.if !defined(RELEASETAG)
+.if defined(SVNROOT)
+	cd ${CHROOTDIR}/usr/src && ${SVNPREFIX} svn switch ${SVNCMDARGS} \
+	    ${SVNBRANCH}
+.elif !defined(RELEASETAG)
 	cd ${CHROOTDIR}/usr/src && ${CVSPREFIX} cvs -R ${CVSARGS} -q \
 	    update ${CVSCMDARGS} -P -d -A
 .else