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+#!/bin/bash
+#
+# source.sh - functions to extract information from source URLs
+#
+# Copyright (c) 2010-2015 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 "$LIBMAKEPKG_UTIL_SOURCE_SH" ]] && return
+LIBMAKEPKG_UTIL_SOURCE_SH=1
+
+LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
+
+source "$LIBRARY/util/message.sh"
+
+
+# a source entry can have two forms :
+# 1) "filename::http://path/to/file"
+# 2) "http://path/to/file"
+
+# extract the URL from a source entry
+get_url() {
+ # strip an eventual filename
+ printf "%s\n" "${1#*::}"
+}
+
+# extract the protocol from a source entry - return "local" for local sources
+get_protocol() {
+ if [[ $1 = *://* ]]; then
+ # strip leading filename
+ local proto="${1#*::}"
+ printf "%s\n" "${proto%%://*}"
+ elif [[ $1 = *lp:* ]]; then
+ local proto="${1#*::}"
+ printf "%s\n" "${proto%%lp:*}"
+ else
+ printf "%s\n" local
+ fi
+}
+
+# extract the filename from a source entry
+get_filename() {
+ local netfile=$1
+
+ # if a filename is specified, use it
+ if [[ $netfile = *::* ]]; then
+ printf "%s\n" ${netfile%%::*}
+ return
+ fi
+
+ local proto=$(get_protocol "$netfile")
+
+ case $proto in
+ bzr*|git*|hg*|svn*)
+ filename=${netfile%%#*}
+ filename=${filename%/}
+ filename=${filename##*/}
+ if [[ $proto = bzr* ]]; then
+ filename=${filename#*lp:}
+ fi
+ if [[ $proto = git* ]]; then
+ filename=${filename%%.git*}
+ fi
+ ;;
+ *)
+ # if it is just an URL, we only keep the last component
+ filename="${netfile##*/}"
+ ;;
+ esac
+ printf "%s\n" "${filename}"
+}
+
+# Return the absolute filename of a source entry
+get_filepath() {
+ local file="$(get_filename "$1")"
+ local proto="$(get_protocol "$1")"
+
+ case $proto in
+ bzr*|git*|hg*|svn*)
+ if [[ -d "$startdir/$file" ]]; then
+ file="$startdir/$file"
+ elif [[ -d "$SRCDEST/$file" ]]; then
+ file="$SRCDEST/$file"
+ else
+ return 1
+ fi
+ ;;
+ *)
+ if [[ -f "$startdir/$file" ]]; then
+ file="$startdir/$file"
+ elif [[ -f "$SRCDEST/$file" ]]; then
+ file="$SRCDEST/$file"
+ else
+ return 1
+ fi
+ ;;
+ esac
+
+ printf "%s\n" "$file"
+}
+
+get_downloadclient() {
+ local proto=$1
+
+ # loop through DOWNLOAD_AGENTS variable looking for protocol
+ local i
+ for i in "${DLAGENTS[@]}"; do
+ local handler="${i%%::*}"
+ if [[ $proto = "$handler" ]]; then
+ local agent="${i#*::}"
+ break
+ fi
+ done
+
+ # if we didn't find an agent, return an error
+ if [[ -z $agent ]]; then
+ error "$(gettext "Unknown download protocol: %s")" "$proto"
+ plain "$(gettext "Aborting...")"
+ exit 1 # $E_CONFIG_ERROR
+ fi
+
+ # ensure specified program is installed
+ local program="${agent%% *}"
+ if [[ ! -x $program ]]; then
+ local baseprog="${program##*/}"
+ error "$(gettext "The download program %s is not installed.")" "$baseprog"
+ plain "$(gettext "Aborting...")"
+ exit 1 # $E_MISSING_PROGRAM
+ fi
+
+ printf "%s\n" "$agent"
+}