moby--moby/hack/make/cross

#!/usr/bin/env bash
set -e

# if we have our linux/amd64 version compiled, let's symlink it in
if [ -x "$DEST/../binary-daemon/dockerd-$VERSION" ]; then
	arch=$(go env GOHOSTARCH)
	mkdir -p "$DEST/linux/${arch}"
	(
		cd "$DEST/linux/${arch}"
		ln -sf ../../../binary-daemon/* ./
	)
	echo "Created symlinks:" "$DEST/linux/${arch}/"*
fi

DOCKER_CROSSPLATFORMS=${DOCKER_CROSSPLATFORMS:-"linux/amd64 windows/amd64"}

for platform in $DOCKER_CROSSPLATFORMS; do
	(
		export KEEPDEST=1
		export DEST="$DEST/$platform" # bundles/VERSION/cross/GOOS/GOARCH/docker-VERSION
		export GOOS=${platform%/*}
		export GOARCH=${platform##*/}

		echo "Cross building: $DEST"
		mkdir -p "$DEST"
		ABS_DEST="$(cd "$DEST" && pwd -P)"
		source "${MAKEDIR}/binary-daemon"
	)
done