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+#!/bin/bash # non-executable, but put this there as a hint to text editors
+# This may be included with or without `set -euE`
+
+# Copyright (c) 2012-2013 by Luke Shumaker <lukeshu@sbcglobal.net>
+#
+# 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 3 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/>.
+
+LIBREUSER="${SUDO_USER:-$USER}"
+if [[ $LIBREUSER == $USER ]]; then
+ LIBREHOME=$HOME
+else
+ LIBREHOME="$(eval echo ~$LIBREUSER)"
+fi
+if [[ -z ${XDG_CONFIG_HOME:-} ]]; then
+ export XDG_CONFIG_HOME="${LIBREHOME}/.config"
+fi
+if [[ -z ${XDG_CACHE_HOME:-} ]]; then
+ export XDG_CACHE_HOME="${LIBREHOME}/.cache"
+fi
+
+# Generic functions ############################################################
+
+# Usage: list_files $slug
+# Lists the configuration files to be considered for $slug.
+# Later files should take precedence over earlier files.
+list_files() {
+ local slug=$1
+ case $slug in
+ abs)
+ echo /etc/$slug.conf
+ echo "$LIBREHOME/.$slug.conf"
+ ;;
+ makepkg)
+ if [[ ${MAKEPKG_CONF:-} != /etc/$slug.conf && -r ${MAKEPKG_CONF:-} ]]; then
+ echo "$MAKEPKG_CONF"
+ else
+ echo /etc/$slug.conf
+ echo "$LIBREHOME/.$slug.conf"
+ fi
+ ;;
+ libretools)
+ echo /etc/$slug.conf
+ echo "$XDG_CONFIG_HOME/libretools/$slug.conf"
+ ;;
+ *)
+ echo /etc/libretools.d/$slug.conf
+ echo "$XDG_CONFIG_HOME/libretools/$slug.conf"
+ ;;
+ esac
+}
+
+# Usage: list_envvars $slug
+# Lists the environmental variables that take precidence over the configuration
+# files for $slug.
+list_envvars() {
+ local slug=$1
+ case $slug in
+ makepkg)
+ printf '%s\n' \
+ PKGDEST SRCDEST SRCPKGDEST LOGDEST \
+ BUILDDIR \
+ PKGEXT SRCEXT \
+ GPGKEY PACKAGER
+ ;;
+ *) :;;
+ esac
+}
+
+# Usage: load_files $slug
+# Loads the configuration files for $slug in the proper order.
+load_files() {
+ local slug=$1
+ local var
+ local file
+
+ # Save the existing versions at _VARNAME
+ for var in $(list_envvars $slug); do
+ [[ -n ${!var:-} ]] && eval "_$var=\${$var}"
+ done
+
+ # Load the files
+ for file in $(list_files $slug); do
+ if [[ -r $file ]]; then
+ . "$file" || return 1
+ fi
+ done
+
+ # Restore the _SAVED versions
+ for var in $(list_envvars $slug); do
+ eval "$var=\${_$var:-\${$var:-}}"
+ done
+}
+
+# Usage: check_vars $slug VAR1 VAR2...
+# Check whether the variables listed are properly set.
+# If not, it prints a message saying to set them in the configuration file(s)
+# for $slug.
+check_vars() {
+ local slug=$1; shift
+
+ local ret=0
+
+ local VAR
+ for VAR in "$@"; do
+ if [[ -z ${!VAR:-} ]]; then
+ type print &>/dev/null || . libremessages
+ if [[ $(list_files $slug|wc -l) -gt 1 ]]; then
+ print "Configure '%s' in one of:" "$VAR"
+ list_files $slug | sed 's/./ -> &/'
+ else
+ print "Configure '%s' in '%s'" "$VAR" "$(list_files $slug)"
+ fi
+ ret=1
+ fi
+ done >&2
+
+ if [[ $ret != 0 ]]; then
+ return 1
+ fi
+}
+
+# makepkg configuration ########################################################
+
+# Usage: get_conf_makepkg <var_name> <default_value>
+get_conf_makepkg() (
+ set +euE
+ local setting=$1
+ local default=$2
+ load_files makepkg
+ printf '%s\n' "${!setting:-${default}}"
+)
+
+set_conf_makepkg() {
+ local key=$1
+ local val=$2
+ local file
+ for file in $(list_files makepkg|tac); do
+ if [[ -w $file ]]; then
+ sed -i "/^\s*$key=/d" "$file"
+ printf '%s=%q\n' "$key" "$val" >> "$file"
+ return 0
+ fi
+ done
+ return 1
+}
+
+# PKGBUILD (not configuration, per se) #########################################
+
+unset_PKGBUILD() {
+ # This routine is based primarily off of the PKGBUILD(5) man-page,
+ # version 4.1.2, dated 2013-06-18.
+
+ # From the "OPTIONS AND DIRECTIVES" section (in order of mention)
+ unset -v pkgname pkgver
+ unset -f pkgver
+ unset -v pkgrel pkgdesc epoch url license install changelog source
+ unset -v noextract md5sums sha{1,256,384,512}sums groups arch backup
+ unset -v depends makedepends checkdepends optdepends conflicts provides
+ unset -v replaces options
+
+ # From the "PACKAGING FUNCTIONS" section (in order of mention)
+ unset -f package prepare build check
+
+ # From the "PACKAGE SPLITTING" section
+ unset -f $(declare -f|sed -n 's/^\(package_\S*\) ()\s*$/\1/p')
+ unset -v pkgbase
+
+ # These are used by the `librefetch` program
+ unset -v mksource mknoextract mkmd5sums mksha{1,256,384,512}sums
+ unset -v mkdepends
+ unset -f mksource
+}
+
+load_PKGBUILD() {
+ local file=${1:-./PKGBUILD}
+ unset_PKGBUILD
+ CARCH="$(get_conf_makepkg CARCH "`uname -m`")"
+ . "$file"
+}