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#!/usr/bin/env bash
# Copyright (C) 2015, 2017 Luke Shumaker <lukeshu@sbcglobal.net>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
interface=$1
printf '//'
printf ' %q' "$0" "$@"
printf '\n// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT\n\n'
cat <<EOF | gofmt
package nslcd_server
import (
"context"
p "git.lukeshu.com/go/libnslcd/nslcd_proto"
)
// NilBackend implements the Backend interface, but only returns empty
// responses. It is useful to add as an anonymous member of a backend
// implementation that does not return results for all of the
// databases.
type NilBackend struct{}
$(
re_in='^\t([^(]+)\(context\.Context, ([^)]+)\) <-chan (\S+)$'
re_out='func (o NilBackend) \1(context.Context, \2) <-chan \3 { r := make(chan \3); close(r); return r }'
< "$interface" sed -rn "s/$re_in/$re_out/p"
)
var _ Backend = NilBackend{}
EOF
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