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path: root/scripts/libmakepkg/util/source.sh.in
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#!/bin/bash
#
#   source.sh - functions to extract information from source URLs
#
#   Copyright (c) 2010-2017 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_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"
}