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# Copyright (C) Max Romanov
# Copyright (C) NGINX, Inc.


shift

NXT_GO=go

for nxt_option; do

    case "$nxt_option" in
        -*=*) value=`$echo "$nxt_option" | sed -e 's/[-_a-zA-Z0-9]*=//'`     ;;
           *) value="" ;;
    esac

    case "$nxt_option" in
        --go=*)       NXT_GO="$value"                                        ;;
        --go-path=*)  NXT_GO_PATH="$value"                                   ;;

        --help)
            cat << END

    --go=NAME        set go executable
    --go-path=PATH   set GOPATH variable to install package

END
            exit 0
        ;;

        *)
            $echo
            $echo $0: error: invalid Go option \"$nxt_option\"
            $echo
            exit 1
        ;;

    esac

done


$echo "configuring Go package"
$echo "configuring Go package ..." >> $NXT_AUTOCONF_ERR

$echo -n "checking for Go ..."
$echo "checking for Go ..." >> $NXT_AUTOCONF_ERR

nxt_go_test="GOPATH=`pwd` CGO_CPPFLAGS=-DNXT_CONFIGURE \
    \"${NXT_GO}\" build -o build/nxt_go_gen.a --buildmode=c-archive nginext"


if /bin/sh -c "$nxt_go_test" >> $NXT_AUTOCONF_ERR 2>&1; then
    $echo " found"

    NXT_GO_VERSION="`${NXT_GO} version`"
    $echo " + ${NXT_GO_VERSION}"

else
    $echo "----------"    >> $NXT_AUTOCONF_ERR
    $echo $nxt_go_test    >> $NXT_AUTOCONF_ERR
    $echo "----------"    >> $NXT_AUTOCONF_ERR
    $echo
    $echo
    $echo $0: error: no Go found.
    $echo
    exit 1;
fi



NXT_GO_PATH=${NXT_GO_PATH=`go env GOPATH`}
NXT_GO_PATH=${NXT_GO_PATH:-`pwd`/${NXT_GO}}

$echo " + Go package path: \"${NXT_GO_PATH}\""

if grep ^$NXT_GO: $NXT_MAKEFILE 2>&1 > /dev/null; then
    $echo
    $echo $0: error: duplicate \"$NXT_GO\" package configured.
    $echo
    exit 1;
fi

cat << END >> $NXT_MAKEFILE

.PHONY:		${NXT_GO}

NXT_ROOT =	`pwd`

GOPATH =	$NXT_GO_PATH
GOOS =		`go env GOOS`
GOARCH =	`go env GOARCH`

${NXT_GO}:
	install -d \$(GOPATH)/src/nginext
	install -p ./src/nginext/*.c ./src/nginext/*.h \\
		./src/nginext/*.go \$(GOPATH)/src/nginext/
	CGO_CFLAGS="-I\$(NXT_ROOT)/build -I\$(NXT_ROOT)/src" \\
		CGO_LDFLAGS="-L\$(NXT_ROOT)/build" \\
		GOPATH=$NXT_GO_PATH \\
		go install -v nginext

${NXT_GO}-uninstall:
	rm -rf \$(GOPATH)/src/nginext
	rm -f \$(GOPATH)/pkg/\$(GOOS)_\$(GOARCH)/nginext.a

END

sed -i.bak -e "s/\(all:.*\)/\1 ${NXT_GO}/" $NXT_MAKEFILE