#!/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

if [ "$(go env GOOS)" = "windows" ]; then
    : "${WINDRES=$($(go env CC) --print-prog-name=windres)}"
    if [ -z "$WINDRES" ]; then
        >&2 echo "Empty WINDRES detected, skipping manifesting binary"
    else
        # Generate a Windows file version of the form major,minor,patch,build
        VERSION_QUAD=$(printf "%s" "$VERSION" | sed -re 's/^([0-9.]*).*$/\1/' | tr . , | sed -re 's/,$//' | sed -re 's/^[0-9]+$/\0,0/' | sed -re 's/^[0-9]+,[0-9]+$/\0,0/' | sed -re 's/^[0-9]+,[0-9]+,[0-9]+$/\0,0/')

        set --
        [ -n "$VERSION" ]      && set -- "$@" -D "DOCKER_VERSION=\"$VERSION\""
        [ -n "$VERSION_QUAD" ] && set -- "$@" -D "DOCKER_VERSION_QUAD=$VERSION_QUAD"
        [ -n "$GITCOMMIT" ]    && set -- "$@" -D "DOCKER_COMMIT=\"$GITCOMMIT\""

        target="$(dirname "$0")/../../cli/winresources/rsrc_$(go env GOARCH).syso"
        mkdir -p "$(dirname "${target}")"
        "$WINDRES" -i "$(dirname "$0")/../winresources/docker.rc" -o "$target" --use-temp-file "$@"
        echo "package winresources" > "$(dirname "${target}")/stub_windows.go"
    fi
fi

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

export GO111MODULE=auto

go build -o "${TARGET}" -tags "${GO_BUILDTAGS}" --ldflags "${LDFLAGS}" ${GO_BUILDMODE} "${SOURCE}"

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