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-rw-r--r--scripts/libmakepkg/util/compress.sh.in47
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diff --git a/scripts/libmakepkg/util/compress.sh.in b/scripts/libmakepkg/util/compress.sh.in
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+++ b/scripts/libmakepkg/util/compress.sh.in
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+#!/bin/bash
+#
+# compress.sh - functions to compress archives in a uniform manner
+#
+# Copyright (c) 2017 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 "$LIBMAKEPKG_UTIL_COMPRESS_SH" ]] && return
+LIBMAKEPKG_UTIL_COMPRESS_SH=1
+
+LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
+
+source "$LIBRARY/util/message.sh"
+
+
+# Wrapper around many stream compression formats, for use in the middle of a
+# pipeline. A tar archive is passed on stdin and compressed to stdout.
+compress_as() {
+ # $1: final archive filename extension for compression type detection
+
+ local filename="$1"
+
+ case "$filename" in
+ *tar.gz) ${COMPRESSGZ[@]:-gzip -c -f -n} ;;
+ *tar.bz2) ${COMPRESSBZ2[@]:-bzip2 -c -f} ;;
+ *tar.xz) ${COMPRESSXZ[@]:-xz -c -z -} ;;
+ *tar.lrz) ${COMPRESSLRZ[@]:-lrzip -q} ;;
+ *tar.lzo) ${COMPRESSLZO[@]:-lzop -q} ;;
+ *tar.Z) ${COMPRESSZ[@]:-compress -c -f} ;;
+ *tar) cat ;;
+ *) warning "$(gettext "'%s' is not a valid archive extension.")" \
+ "$ext"; cat ;;
+ esac
+}