Add a package for ARPC.

ARPC is an RPC library similar to GRPC. Though a lot simpler than GRPC
featurewise, it has transparent support for file descriptor passing.
ARPC is used by some applications related to CloudABI, like Flower
(CloudABI's networking daemon).

Reviewed by:	riggs
Differential Revision:	https://reviews.freebsd.org/D12103

devel/Makefile

@@ -133,6 +133,7 @@
     SUBDIR += arm-none-eabi-gdb
     SUBDIR += arm-none-eabi-newlib
     SUBDIR += aros-sdk
+    SUBDIR += arpc
     SUBDIR += art
     SUBDIR += artifactory
     SUBDIR += as31

devel/arpc/Makefile

+# Created by: Ed Schouten <ed@FreeBSD.org>
+# $FreeBSD$
+
+PORTNAME=	arpc
+DISTVERSIONPREFIX=	v
+DISTVERSION=	0.5
+CATEGORIES=	devel
+
+MAINTAINER=	ed@FreeBSD.org
+COMMENT=	GRPC-like RPC library that supports file descriptor passing
+
+LICENSE=	BSD2CLAUSE
+LICENSE_FILE=	${WRKSRC}/LICENSE
+
+BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pyPEG2>=2.15.2:textproc/py3-pyPEG2 \
+		${PYTHON_PKGNAMEPREFIX}toposort>=1.5:devel/py3-toposort
+LIB_DEPENDS=	libargdata.so:devel/argdata
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pyPEG2>=2.15.2:textproc/py3-pyPEG2 \
+		${PYTHON_PKGNAMEPREFIX}toposort>=1.5:devel/py3-toposort
+
+USES=		cmake localbase:ldflags python:3 tar:xz
+USE_LDCONFIG=	yes
+USE_GITHUB=	yes
+GH_ACCOUNT=	NuxiNL
+
+PLIST_FILES=	bin/aprotoc include/arpc++/arpc++.h \
+		lib/libarpc.so lib/libarpc.so.1
+
+.include <bsd.port.pre.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} < 1100511
+IGNORE=		requires various C++17 features
+.endif
+
+# Require the unit tests to pass prior to installing.
+post-build:
+	@trap '' PIPE && ${WRKSRC}/arpc_tests
+
+.include <bsd.port.post.mk>

devel/arpc/distinfo

+TIMESTAMP = 1502895324
+SHA256 (NuxiNL-arpc-v0.5_GH0.tar.gz) = 754853d37d83138e62f23eff95be8b3fa200238387d83e83453e6a5519458bed
+SIZE (NuxiNL-arpc-v0.5_GH0.tar.gz) = 1301060

devel/arpc/pkg-descr

+ARPC is a GRPC-like library that supports file descriptor passing.
+
+ARPC ships with a script, aprotoc, that works similar to Protobuf/GRPC's
+protoc. It generates message and service bindings, taking a .proto file
+as an input. Where ARPC differs from GRPC is that messages may contain
+file descriptors. These file descriptors are passed on to the remote
+side transparently. This makes ARPC useful for implementing privilege
+separation between processes.
+
+WWW: https://github.com/NuxiNL/arpc