Split prepare_buildenv() to libmakepkg

This opens the door for third parties to provide libmakepkg
extentions for the purpose of altering the build environment.

Signed-off-by: Que Quotion <quequotion@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/scripts/libmakepkg/buildenv.sh.in b/scripts/libmakepkg/buildenv.sh.in
new file mode 100644
index 00000000..bb1c73bc
--- /dev/null
+++ b/scripts/libmakepkg/buildenv.sh.in
@@ -0,0 +1,45 @@
+#!/bin/bash
+#
+#   buildenv.sh - functions for altering the build environment before
+#   compiliation
+#
+#   Copyright (c) 2015-2018 Pacman Development Team <pacman-dev@archlinux.org>
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+[[ -n "$LIBMAKEPKG_BUILDENV_SH" ]] && return
+LIBMAKEPKG_BUILDENV_SH=1
+
+LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
+
+source "$LIBRARY/util/message.sh"
+
+
+declare -a buildenv_functions build_options
+
+for lib in "$LIBRARY/buildenv/"*.sh; do
+	source "$lib"
+done
+
+readonly -a buildenv_functions build_options
+
+prepare_buildenv() {
+	for func in ${buildenv_functions[@]}; do
+		$func
+	done
+
+	# ensure all necessary build variables are exported
+	export CPPFLAGS CFLAGS CXXFLAGS LDFLAGS MAKEFLAGS CHOST
+}