libmakepkg: extract functions for handling source URLs

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 144 insertions, 0 deletions

diff --git a/scripts/libmakepkg/util/source.sh.in b/scripts/libmakepkg/util/source.sh.in
new file mode 100644
index 00000000..0a4f671c
--- /dev/null
+++ b/scripts/libmakepkg/util/source.sh.in
@@ -0,0 +1,144 @@
+#!/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"
+}