#!/usr/bin/env bash
#
# Build a binary for all supported platforms
#

set -eu -o pipefail

BUILDDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
export SHELL=bash

jobs=(
    "$BUILDDIR/windows" \
    "$BUILDDIR/osx" \
    "GOOS=linux GOARCH=amd64   $BUILDDIR/binary" \
    "GOOS=linux GOARCH=arm     $BUILDDIR/binary" \
    "GOOS=linux GOARCH=ppc64le $BUILDDIR/binary" \
    "GOOS=linux GOARCH=s390x   $BUILDDIR/binary" \
)

# Outside of circleCI run all at once. On circleCI run two at a time because
# each continer has access to two cores.
group=${CROSS_GROUP-"all"}

if [ "$group" == "all" ]; then

    echo "Building binaries for all platforms"
    parallel ::: "${jobs[@]}"
    exit 0

fi

declare -i start=$group*2
parallel ::: "${jobs[@]:$start:2}"