rpc.eclass: add WIP

1 files changed, 95 insertions, 0 deletions

diff --git a/eclass/rpc.eclass b/eclass/rpc.eclass
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+++ b/eclass/rpc.eclass
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+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: rpc.eclass
+# @MAINTAINER:
+# toolchain@gentoo.org
+# @BLURB: helper functions to depend on rpc implementations
+# @DESCRIPTION:
+# This eclass ...
+# @EXAMPLE:
+#
+# @CODE
+# inherit rpc
+#
+# @CODE
+
+case ${EAPI:-0} in
+	0|1)		die "EAPI=0 and EAPI=1 is not supported by ${ECLASS}.eclass." ;;
+	2|3|4|5|6)	;;
+	*)		die "${ECLASS}.eclass API in EAPI ${EAPI} not yet established."
+esac
+
+# @ECLASS-VARIABLE: RPC_COMPAT
+# @DESCRIPTION:
+# This variable contains a list of RPC implementations the package
+# supports. It must be set before the `inherit' call; if not, the
+# package is assumed to be compatible with all known implementations.
+# Example (the default):
+# @CODE
+# RPC_COMPAT=( sunrpc libtirpc ntirpc )
+# @CODE
+: ${RPC_COMPAT:=( sunrpc libtirpc ntirpc )}
+
+# @ECLASS-VARIABLE: RPC_REQUIRED
+# @DESCRIPTION:
+# Is rpc support required? Possible values are 'always' and 'optional'.
+# This variable must be set before inheriting any eclasses. Defaults to 'always'
+# If set to 'optional', a useflag 'rpc' is created.
+RPC_REQUIRED="${RPC_REQUIRED:-always}"
+
+# @ECLASS-VARIABLE: RPC_CONFIGURE
+# @DESCRIPTION:
+# Contains a string to supply to a configure call as argument; suitable if the
+# reference autoconf snippet is used for patching. In detail, the content is
+# '--with-rpc=x', where x is one of sunrpc, libtirpc, ntirpc, depending on the
+# use-flag settings.
+
+local _rpc_rdepend=""
+local _rpc_depend=""
+
+for i in "${RPC_COMPAT[@]}"; do
+	case "${i}" in
+		sunrpc)
+			_rpc_depend+="sunrpc? ( elibc_glibc? ( <sys-libs/glibc-2.26[rpc] ) ) "
+			_rpc_rdepend+="sunrpc? ( elibc_glibc? ( <sys-libs/glibc-2.26[rpc] ) ) "
+			IUSE+="sunrpc "
+			use sunrpc && RPC_CONFIGURE="--with-rpc=sunrpc"
+			;;
+		libtirpc)
+			_rpc_depend+="libtirpc? ( net-libs/libtirpc virtual/pkgconfig ) "
+			_rpc_rdepend+="libtirpc? ( net-libs/libtirpc ) "
+			IUSE+="libtirpc "
+			use libtirpc && RPC_CONFIGURE="--with-rpc=libtirpc"
+			;;
+		ntirpc)
+			_rpc_depend+="ntirpc? ( net-libs/ntirpc virtual/pkgconfig ) "
+			_rpc_rdepend+="ntirpc? ( net-libs/ntirpc ) "
+			IUSE+="ntirpc "
+			use ntirpc && RPC_CONFIGURE="--with-rpc=ntirpc"
+			;;
+		*)
+			die "Unsupported RPC implementation ${i}"
+			;;
+	done
+done
+
+case "${RPC_REQUIRED}" in
+	always)
+		DEPEND=${_rpc_depend}
+		RDEPEND=${_rpc_rdepend}
+		;;
+	optional)
+		IUSE+="rpc "
+		DEPEND="rpc? ( ${_rpc_depend} )"
+		RDEPEND="rpc? ( ${_rpc_rdepend} )"
+		;;
+	*)
+		die "Unsupported value for RPC_REQUIRED."
+		;;
+done
+
+#REQUIRED_USE="^^ ( sunrpc libtirpc ntirpc )"
+
+unset _rpc_rdepend
+unset _rpc_depend