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, 55 insertions, 0 deletions

diff --git a/scripts/libmakepkg/buildenv/compiler.sh.in b/scripts/libmakepkg/buildenv/compiler.sh.in
new file mode 100644
index 00000000..245c8a76
--- /dev/null
+++ b/scripts/libmakepkg/buildenv/compiler.sh.in
@@ -0,0 +1,55 @@
+#!/usr/bin/bash
+#
+#   compiler.sh - CCache and DistCC compilation
+#   ccache - Cache compilations and reuse them to save time on repetitions
+#   distcc - Distribute compilation of C and C++ across machines
+#
+#   Copyright (c) 2007-2018 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 "$LIBMAKEPKG_BUILDENV_COMPILER_SH" ]] && return
+LIBMAKEPKG_BUILDENV_COMPILER_SH=1
+
+LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
+
+source "$LIBRARY/util/option.sh"
+
+build_options+=('ccache' 'distcc')
+buildenv_functions+=('buildenv_ccache' 'buildenv_distcc')
+
+using_ccache=0
+
+buildenv_ccache() {
+	if check_buildoption "ccache" "y"; then
+		if [ -d /usr/lib/ccache/bin ]; then
+			export PATH="/usr/lib/ccache/bin:$PATH"
+			using_ccache=1
+		fi
+	fi
+}
+
+buildenv_distcc() {
+	if check_buildoption "distcc" "y"; then
+		if (( using_ccache )); then
+			export CCACHE_PREFIX="${CCACHE_PREFIX:+$CCACHE_PREFIX }distcc"
+			export CCACHE_BASEDIR="$srcdir"
+		elif [[ -d /usr/lib/distcc/bin ]]; then
+			export PATH="/usr/lib/distcc/bin:$PATH"
+		fi
+
+		export DISTCC_HOSTS
+	fi
+}