#!/usr/bin/env sh
#
# Build a static binary for the host OS/ARCH
#

set -eu

: "${CGO_ENABLED=}"
: "${GO_LINKMODE=static}"
: "${GO_BUILDMODE=}"
: "${GO_BUILDTAGS=}"
: "${GO_STRIP=}"

. ./scripts/build/.variables

if [ -z "$CGO_ENABLED" ]; then
    case "$(go env GOOS)" in
        linux)
            case "$(go env GOARCH)" in
                amd64|arm64|arm|s390x)
                    CGO_ENABLED=1
                ;;
                *)
                    CGO_ENABLED=0
                ;;
            esac
        ;;
        darwin|windows)
            CGO_ENABLED=1
        ;;
        *)
            CGO_ENABLED=0
        ;;
    esac
fi
export CGO_ENABLED
if [ "$CGO_ENABLED" = "1" ] && [ "$(go env GOOS)" != "windows" ]; then
    case "$(go env GOARCH)" in
        mips*|ppc64)
            # pie build mode is not supported on mips architectures
            ;;
        *)
            GO_BUILDMODE="-buildmode=pie"
            ;;
    esac
    GO_BUILDTAGS="$GO_BUILDTAGS pkcs11"
fi

if [ "$CGO_ENABLED" = "1" ] && [ "$GO_LINKMODE" = "static" ] && [ "$(go env GOOS)" = "linux" ]; then
    LDFLAGS="$LDFLAGS -extldflags -static"
fi

if [ -n "$GO_STRIP" ]; then
    LDFLAGS="$LDFLAGS -s -w"
fi

echo "Building $GO_LINKMODE $(basename "${TARGET}")"

export GO111MODULE=auto

if [ "$(go env GOOS)" = "windows" ]; then
  if [ ! -x "$(command -v goversioninfo)" ]; then
    >&2 echo "goversioninfo not found, skipping manifesting binary"
  else
    ./scripts/build/mkversioninfo
    (set -x ; go generate -v "${SOURCE}")
  fi
fi

(set -x ; go build -o "${TARGET}" -tags "${GO_BUILDTAGS}" --ldflags "${LDFLAGS}" ${GO_BUILDMODE} "${SOURCE}")

ln -sf "$(basename "${TARGET}")" "$(dirname "${TARGET}")/docker"