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49 lines
1.5 KiB
Go
49 lines
1.5 KiB
Go
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/*
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Copyright 2015 Google Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package option contains common code for dealing with client options.
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package option
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import (
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"fmt"
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"os"
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"google.golang.org/api/option"
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"google.golang.org/grpc"
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)
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// DefaultClientOptions returns the default client options to use for the
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// client's gRPC connection.
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func DefaultClientOptions(endpoint, scope, userAgent string) ([]option.ClientOption, error) {
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var o []option.ClientOption
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// Check the environment variables for the bigtable emulator.
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// Dial it directly and don't pass any credentials.
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if addr := os.Getenv("BIGTABLE_EMULATOR_HOST"); addr != "" {
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conn, err := grpc.Dial(addr, grpc.WithInsecure())
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if err != nil {
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return nil, fmt.Errorf("emulator grpc.Dial: %v", err)
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}
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o = []option.ClientOption{option.WithGRPCConn(conn)}
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} else {
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o = []option.ClientOption{
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option.WithEndpoint(endpoint),
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option.WithScopes(scope),
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option.WithUserAgent(userAgent),
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}
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}
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return o, nil
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}
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