#!/bin/bash

if [ $# -ne 3 ]; then
	echo "usage: $(basename $0) <packagename> <repo> <arch>"
	exit 1
fi

if [ -f "/etc/makepkg.conf" ]; then
	#Get some config info
	. /etc/makepkg.conf
else
	echo "/etc/makepkg.conf does not exist!"
	exit 1
fi
packagename="$1"
reponame="$2"
arch="$3"

##### Arch specific stuff. TODO make this configurable #####
srcpath="/home/aaron/public_html/sources/"
svnpath="file:///home/svn-packages/$packagename/"
############################################################

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

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

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

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

create_srcpackage() {
    if [ -d "$1" ]; then
        pushd "$1" >/dev/null
        . "$BUILDSCRIPT"
        if ! /usr/bin/makepkg -gc >/dev/null 2>&1; then
            popd >/dev/null
            return 1
        fi
        popd >/dev/null

        local pkg_file="${pkgname}-${pkgver}-${pkgrel}${SRCEXT}"
        if ! /usr/bin/bsdtar -czf "$pkg_file" "$1"; then
            return 2
        fi

        echo ":: Source package complete: $pkg_file"
        if [ ! -d "$srcpath" ]; then
            mkdir -p "$srcpath"
        fi
        cp $pkg_file "$srcpath"

        return 0
    fi
}

trap ctrl_c 2
trap cleanup 0

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

echo "Creating Source tarball for $packagename ($reponame-$arch)"

if /usr/bin/svn export -q "$svnpath/repos/$reponame-$arch" $packagename; then
    create_srcpackage "$packagename"
    if [ $? -eq 0 ]; then
        exit 0
    elif [ $? -eq 1 ]; then
        #trunk sometimes has updated URLs
        echo ":: Failed to download source, attempting trunk build"
        rm -rf "$packagename"
        if /usr/bin/svn export -q "$svnpath/trunk" "$packagename"; then
            create_srcpackage "$packagename"
            if [ $? -eq 0 ]; then
                echo ":: Source package complete: $pkg_file"
                exit 0
            elif [ $? -eq 1 ]; then
                die ":: Failed to download source"
            elif [ $? -eq 2 ]; then
                die ":: Failed to compress package"
            else
                die ":: Unknown failure reason"
            fi
        fi
        exit 1
    elif [ $? -eq 2 ]; then
        die ":: Failed to compress package"
    fi
else
    die "Package '$packagename' does not exist in repo $reponame-$arch"
fi