moby/hack/make/cross

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

# explicit list of os/arch combos that support being a daemon
declare -A daemonSupporting
daemonSupporting=(
	[linux/amd64]=1
	[windows/amd64]=1
)

# 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/${arch}"
		ln -s ../../../binary-daemon/* ./
	)
	echo "Created symlinks:" "$DEST/linux/${arch}/"*
fi

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##*/}

		if [ "$GOOS" != "solaris" ]; then
			# TODO. Solaris cannot be cross build because of CGO calls.

			# go install docker/docker/pkg packages to ensure that
			# they build cross platform.
			go install github.com/docker/docker/pkg/...

			if [ -n "${daemonSupporting[$platform]}" ]; then
				# Since tgz relies on the paths created by mkdir
				# and we removed the clients, we don't want to mkdir
				# for all the platforms, only the ones supported by the daemon.
				mkdir -p "$DEST"
				ABS_DEST="$(cd "$DEST" && pwd -P)"
				source "${MAKEDIR}/binary-daemon"
			fi
		fi
	)
done