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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
# Low-level 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/.$slug.conf"
fi
;;
xbs)
echo /etc/$slug.conf
echo "$XDG_CONFIG_HOME/$slug.conf"
;;
xbs*)
echo /etc/xbs.d/$slug.conf
echo "$XDG_CONFIG_HOME/xbs.d/$slug.conf"
;;
libretools)
echo /etc/$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 precedence 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
;;
libretools)
printf '%s\n' DIFFPROG
;;
xbs)
printf '%s\n' BUILDSYSTEM
;;
*) :;;
esac
}
# High-level generic functions #################################################
# 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
}
# Usage: get_var <slug> <var_name> <default_value>
# Does not work with arrays
get_var() (
set +euE
local slug=$1
local setting=$2
local default=$3
load_files "$slug"
printf '%s' "${!setting:-${default}}"
)
# Usage: set_var <slug> <var_name> <value>
# Does not work with arrays
set_var() {
local slug=$1
local key=$2
local val=$3
local file
for file in $(list_files "$slug"|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="$(get_var makepkg CARCH "`uname -m`")"
. "$file"
}
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