Improve update-cleansystem

1 files changed, 52 insertions, 14 deletions

diff --git a/update-cleansystem b/update-cleansystem
index 97c2922..4ea6a24 100755
--- a/update-cleansystem
+++ b/update-cleansystem
@@ -1,24 +1,62 @@
 #!/bin/bash
 # Updates the cleansystem file
-# Creates a fake Parabola root and prints all packages installable from base
-# and base-devel plus extras
+# Creates a fake Parabola root and writes to cleansystem all
+# packages installable from base and base-devel plus extras.
 
-set -E
+# Copyright 2012 Nicolás Reynolds, Luke Shumaker
 
-if [ ! -w / ]; then
-    echo "Run as root."
-    exit 1
+# ---------- GNU General Public License 3 ----------
+
+# This file is part of Parabola.
+
+# Parabola 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.
+
+# Parabola 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 Parabola. If not, see <http://www.gnu.org/licenses/>.
+
+source /etc/libretools.conf
+
+cleansystem=/etc/libretools.d/cleansystem
+
+cmd=${0##*/}
+usage() {
+	echo "Usage: $cmd [<EXTRA_PACKAGES>]"
+	echo "       $cmd -h"
+	echo "Creates a fake Parabola root and writes to \`$cleansystem' all"
+	echo "packages installable from base and base-devel plus extras."
+	echo ''
+	echo 'Options:'
+	echo ' -h              Show this message'
+}
+
+if [ "$1" == '-h' ]; then
+	usage
+	exit 0
 fi
 
-tmpdir=/tmp/cleansystem.${RANDOM}
+if [ ! -w "$cleansystem" ]; then
+	error 'This script must be run as root'
+	exit 1
+fi
 
-mkdir -p ${tmpdir}/var/lib/pacman
+tmpdir="`mktemp -d --tmpdir cleansystem.XXXXXXXXXX`"
+mkdir -p "${tmpdir}"/var/lib/pacman
 
 # We sync first because updating info gets printed to stdout too
-pacman -r ${tmpdir} --config /etc/pacman.conf -Sy 2>/dev/null
-pacman -r ${tmpdir} \
-       --config /etc/pacman.conf \
-       -Sp --print-format "%n" \
-       base base-devel sudo ${@} | sort > /etc/libretools.d/cleansystem
+pacman -r "${tmpdir}" --config /etc/pacman.conf -Sy 2>/dev/null
+pacman -r "${tmpdir}" --config /etc/pacman.conf \
+	-Sp --print-format "%n" \
+	base base-devel sudo "$@" | sort > "$cleansystem"
+exitcode=$?
+
+rm -rf "$tmpdir"
 
-exit $?
+exit $exitcode