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path: root/scripts/libmakepkg/source/file.sh.in
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#!/bin/bash
#
#   file.sh - function for handling the download and extraction of source files
#
#   Copyright (c) 2015-2017 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_SOURCE_FILE_SH" ]] && return
LIBMAKEPKG_SOURCE_FILE_SH=1


LIBRARY=${LIBRARY:-'@libmakepkgdir@'}

source "$LIBRARY/util/message.sh"
source "$LIBRARY/util/pkgbuild.sh"


download_file() {
        local netfile=$1

        local filepath=$(get_filepath "$netfile")
        if [[ -n "$filepath" ]]; then
                msg2 "$(gettext "Found %s")" "${filepath##*/}"
                return
        fi

        local proto=$(get_protocol "$netfile")

        # find the client we should use for this URL
        local -a cmdline
        IFS=' ' read -a cmdline < <(get_downloadclient "$proto")
        (( ${#cmdline[@]} )) || exit

        local filename=$(get_filename "$netfile")
        local url=$(get_url "$netfile")

        if [[ $proto = "scp" ]]; then
                # scp downloads should not pass the protocol in the url
                url="${url##*://}"
        fi

        msg2 "$(gettext "Downloading %s...")" "$filename"

        # temporary download file, default to last component of the URL
        local dlfile="${url##*/}"

        # replace %o by the temporary dlfile if it exists
        if [[ ${cmdline[*]} = *%o* ]]; then
                dlfile=$filename.part
                cmdline=("${cmdline[@]//%o/$dlfile}")
        fi
        # add the URL, either in place of %u or at the end
        if [[ ${cmdline[*]} = *%u* ]]; then
                cmdline=("${cmdline[@]//%u/$url}")
        else
                cmdline+=("$url")
        fi

        if ! command -- "${cmdline[@]}" >&2; then
                [[ ! -s $dlfile ]] && rm -f -- "$dlfile"
                error "$(gettext "Failure while downloading %s")" "$url"
                plain "$(gettext "Aborting...")"
                exit 1
        fi

        # rename the temporary download file to the final destination
        if [[ $dlfile != "$filename" ]]; then
                mv -f "$SRCDEST/$dlfile" "$SRCDEST/$filename"
        fi
}

extract_file() {
        local file=$1

        local filepath=$(get_filepath "$file")
        rm -f "$srcdir/${file}"
        ln -s "$filepath" "$srcdir/"

        if in_array "$file" "${noextract[@]}"; then
                # skip source files in the noextract=() array
                # these are marked explicitly to NOT be extracted
                return 0
        fi

        # do not rely on extension for file type
        local file_type=$(file -bizL "$file")
        local ext=${file##*.}
        local cmd=''
        case "$file_type" in
                *application/x-tar*|*application/zip*|*application/x-zip*|*application/x-cpio*)
                        cmd="bsdtar" ;;
                *application/x-gzip*)
                        case "$ext" in
                                gz|z|Z) cmd="gzip" ;;
                                *) return;;
                        esac ;;
                *application/x-bzip*)
                        case "$ext" in
                                bz2|bz) cmd="bzip2" ;;
                                *) return;;
                        esac ;;
                *application/x-xz*)
                        case "$ext" in
                                xz) cmd="xz" ;;
                                *) return;;
                        esac ;;
                *)
                        # See if bsdtar can recognize the file
                        if bsdtar -tf "$file" -q '*' &>/dev/null; then
                                cmd="bsdtar"
                        else
                                return 0
                        fi ;;
        esac

        local ret=0
        msg2 "$(gettext "Extracting %s with %s")" "$file" "$cmd"
        if [[ $cmd = "bsdtar" ]]; then
                $cmd -xf "$file" || ret=$?
        else
                rm -f -- "${file%.*}"
                $cmd -dcf "$file" > "${file%.*}" || ret=$?
        fi
        if (( ret )); then
                error "$(gettext "Failed to extract %s")" "$file"
                plain "$(gettext "Aborting...")"
                exit 1
        fi

        if (( EUID == 0 )); then
                # change perms of all source files to root user & root group
                chown -R 0:0 "$srcdir"
        fi
}