Index: devel/Makefile
===================================================================
--- devel/Makefile
+++ devel/Makefile
@@ -4858,6 +4858,7 @@
     SUBDIR += py-tinyrpc
     SUBDIR += py-tipper
     SUBDIR += py-tooz
+    SUBDIR += py-toposort
     SUBDIR += py-total-ordering
     SUBDIR += py-tox
     SUBDIR += py-trace2html
@@ -5083,6 +5084,7 @@
     SUBDIR += py3-six
     SUBDIR += py3-tabulate
     SUBDIR += py3-threema-msgapi
+    SUBDIR += py3-toposort
     SUBDIR += py3-tox
     SUBDIR += py3-tzlocal
     SUBDIR += py3-urwid
Index: devel/py-toposort/Makefile
===================================================================
--- /dev/null
+++ devel/py-toposort/Makefile
@@ -0,0 +1,20 @@
+# Created by: Ed Schouten <ed@FreeBSD.org>
+# $FreeBSD$
+
+PORTNAME=	toposort
+PORTVERSION=	1.5
+CATEGORIES=	devel python
+MASTER_SITES=	CHEESESHOP
+PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
+
+MAINTAINER=	ed@FreeBSD.org
+COMMENT=	Topological sorting algorithm for Python
+
+LICENSE=	APACHE20
+LICENSE_FILE=	${WRKSRC}/LICENSE.txt
+
+USES?=		python
+USE_PYTHON=	autoplist distutils
+NO_ARCH=	yes
+
+.include <bsd.port.mk>
Index: devel/py-toposort/distinfo
===================================================================
--- /dev/null
+++ devel/py-toposort/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1502893729
+SHA256 (toposort-1.5.tar.gz) = dba5ae845296e3bf37b042c640870ffebcdeb8cd4df45adaa01d8c5476c557dd
+SIZE (toposort-1.5.tar.gz) = 10294
Index: devel/py-toposort/pkg-descr
===================================================================
--- /dev/null
+++ devel/py-toposort/pkg-descr
@@ -0,0 +1,6 @@
+PyPEG2 is a parser-interpreter for Parsing Expression Grammars (PEGs).
+
+PEGs look similar to context-free grammars (CFGs), except that the choice
+operator always selects the first match.
+
+WWW: https://fdik.org/pyPEG/
Index: devel/py3-toposort/Makefile
===================================================================
--- /dev/null
+++ devel/py3-toposort/Makefile
@@ -0,0 +1,8 @@
+# Created by: Ed Schouten <ed@FreeBSD.org>
+# $FreeBSD$
+
+MASTERDIR=	${.CURDIR}/../py-toposort
+
+USES=		python:3.3+
+
+.include "${MASTERDIR}/Makefile"