moby/hack/make/.binary

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

# a helper to provide ".exe" when it's appropriate
binary_extension() {
	if [ "$(go env GOOS)" = 'windows' ]; then
		echo -n '.exe'
	fi
}

BINARY_EXTENSION="$(binary_extension)"
BINARY_FULLNAME="$BINARY_NAME$BINARY_EXTENSION"

source "${MAKEDIR}/.go-autogen"

(
	export GOGC=${DOCKER_BUILD_GOGC:-1000}

	# for non-sandboxed invocation
	if ! command -v xx-go > /dev/null 2>&1; then
		if [ "$(go env GOOS)/$(go env GOARCH)" != "$(go env GOHOSTOS)/$(go env GOHOSTARCH)" ]; then
			# must be cross-compiling!
			case "$(go env GOOS)/$(go env GOARCH)" in
				windows/amd64)
					export CC="${CC:-x86_64-w64-mingw32-gcc}"
					export CGO_ENABLED=1
					;;
				linux/arm)
					case "${GOARM}" in
						5)
							export CC="${CC:-arm-linux-gnueabi-gcc}"
							export CGO_ENABLED=1
							export CGO_CFLAGS="-march=armv5t"
							export CGO_CXXFLAGS="-march=armv5t"
							;;
						6)
							export CC="${CC:-arm-linux-gnueabi-gcc}"
							export CGO_ENABLED=1
							export CGO_CFLAGS="-march=armv6"
							export CGO_CXXFLAGS="-march=armv6"
							;;
						7)
							export CC="${CC:-arm-linux-gnueabihf-gcc}"
							export CGO_ENABLED=1
							export CGO_CFLAGS="-march=armv7-a"
							export CGO_CXXFLAGS="-march=armv7-a"
							;;
						*)
							export CC="${CC:-arm-linux-gnueabihf-gcc}"
							export CGO_ENABLED=1
							;;
					esac
					;;
				linux/arm64)
					export CC="${CC:-aarch64-linux-gnu-gcc}"
					export CGO_ENABLED=1
					;;
				linux/amd64)
					export CC="${CC:-x86_64-linux-gnu-gcc}"
					export CGO_ENABLED=1
					;;
				linux/ppc64le)
					export CC="${CC:-powerpc64le-linux-gnu-gcc}"
					export CGO_ENABLED=1
					;;
				linux/s390x)
					export CC="${CC:-s390x-linux-gnu-gcc}"
					export CGO_ENABLED=1
					;;
			esac
		fi
	fi

	# -buildmode=pie is not supported on Windows and Linux on mips, riscv64 and ppc64be.
	# https://github.com/golang/go/blob/77aa209b386a184e7f4b44938f2a05a1b5c5a3cf/src/cmd/internal/sys/supported.go#L89-L99
	case "$(go env GOOS)/$(go env GOARCH)" in
		windows/* | linux/mips* | linux/riscv* | linux/ppc64) ;;
		# TODO remove windows in Go 1.15+: https://github.com/golang/go/commit/95f382139043059a2a0780ba577b53893408f7e4
		# TODO remove riscv64 in Go 1.16+: https://github.com/golang/go/commit/8eb846fd37eb7bded8a1cf6932be2c59069863e5

		*)
			BUILDFLAGS+=("-buildmode=pie")
			;;
	esac

	# only necessary for non-sandboxed invocation where TARGETPLATFORM is empty
	PLATFORM_NAME=$TARGETPLATFORM
	if [ -z "$PLATFORM_NAME" ]; then
		PLATFORM_NAME="$(go env GOOS)/$(go env GOARCH)"
		if [ -n "$(go env GOARM)" ]; then
			PLATFORM_NAME+="/$(go env GOARM)"
		elif [ -n "$(go env GOAMD64)" ] && [ "$(go env GOAMD64)" != "v1" ]; then
			PLATFORM_NAME+="/$(go env GOAMD64)"
		fi
	fi

	echo "Building $DEST/$BINARY_FULLNAME ($PLATFORM_NAME)..."
	go build \
		-o "$DEST/$BINARY_FULLNAME" \
		"${BUILDFLAGS[@]}" \
		-ldflags "
		$LDFLAGS
		$LDFLAGS_STATIC_DOCKER
		$DOCKER_LDFLAGS
	" \
		${GO_PACKAGE}
)

echo "Created binary: $DEST/$BINARY_FULLNAME"