#!/bin/bash

# Allowed licenses: build only for licenses in this array
ALLOWED_LICENSES=('GPL' 'GPL1' 'GPL2' 'LGPL' 'LGPL1' 'LGPL2')

if [ $# -ne 3 -a $# -ne 4 ]; then
    echo "usage: $(basename $0) [-f] <packagename> <repo> <arch>"
    echo "  -f  Force building. Skip license checks"
    exit 1
fi

. "$(dirname $0)/../db-functions"
. "$(dirname $0)/../config"

FORCE=0
if [ "$1" = "-f" ]; then
    FORCE=1
    shift
fi

packagename="$1"
reponame="$2"
_arch="$3"

srcpath="$FTP_BASE/sources/"
logpath="/var/log/sourceballs/"

WORKDIR="/tmp/make-sourceball.$packagename.$UID"

cleanup() {
    restore_umask
    rm -rf "$WORKDIR"
    [ "$1" ] && exit $1
}

ctrl_c() {
    echo "Interrupted" >&2
    cleanup 0
}

die() {
    echo -e "$*" >&2
    cleanup 1
}

#usage: chk_license ${license[@]}"
chk_license() {
    #The -f flag skips this check
    if [ $FORCE = 1 ]; then
        return 0
    fi

    local l
    for l in "$@"; do
        l="$(echo $l | tr '[:upper:]' '[:lower:]')"
        for allowed in ${ALLOWED_LICENSES[@]}; do
            allowed="$(echo $allowed | tr '[:upper:]' '[:lower:]')"
            if [ "$l" = "$allowed" ]; then
                return 0
            fi
        done
    done

    return 1
}

create_srcpackage() {
    if [ -d "$1" ]; then
        pushd "$1" >/dev/null
        . "$BUILDSCRIPT"

        echo "Creating source tarball for $pkgname-$pkgver-$pkgrel"

        if ! chk_license ${license[@]}; then
            #Removed so as not to clutter failed.txt
            #echo -e "\t$pkgname license (${license[@]}) does not require source tarballs" >&2
            cleanup 0
        fi

        local logfile="$logpath/$pkgname"
        if ! /usr/bin/makepkg --allsource --ignorearch >"$logfile" 2>&1; then
            popd >/dev/null
            /bin/gzip -f -9 "$logfile"
            die "\tFailed to download source for $pkgname-$pkgver-$pkgrel ($reponame-$_arch)"
        fi
        /bin/rm -f "$logfile"{,.gz}

        local pkg_file="${pkgname}-${pkgver}-${pkgrel}${SRCEXT}"

        if [ ! -d "$srcpath" ]; then
            mkdir -p "$srcpath"
        fi
        cp "$pkg_file" "$srcpath"

        popd >/dev/null

        return 0
    fi
}

remove_old() {
    if [ -d "$1" ]; then
        pushd "$1" >/dev/null
        PKGVERS=""
        for repo in *; do
            cd "$repo"
            . "$BUILDSCRIPT"
            PKGVERS="$PKGVERS $pkgver-$pkgrel"
            cd ..
        done

        for pkg in "$srcpath/$pkgname-"*; do
            pkg="$(basename $pkg)"
            if [ "$(getpkgname $pkg)" == "$pkgname" ]; then
                skip=0
                pver="$(getpkgver $pkg)"
                for v in $PKGVERS; do
                    if [ "$v" = "$pver" ]; then
                        skip=1
                        break
                    fi
                done
                if [ $skip -ne 1 ]; then 
                    rm -f "$srcpath/$pkg"
                fi
            fi
        done

        popd >/dev/null
    fi
}

trap ctrl_c 2
trap cleanup 0 1

set_umask
/bin/mkdir -p "$WORKDIR"
/bin/mkdir -p "$logpath"
cd "$WORKDIR"

if /usr/bin/svn export -q "$SVNREPO/$packagename" $packagename; then
    remove_old "$pkgname/repos/"
    create_srcpackage "$packagename/repos/$reponame-$_arch"
else
    die "\tPackage '$packagename' does not exist in repo '$reponame-$_arch'"
fi