46 lines
1.4 KiB
Go
46 lines
1.4 KiB
Go
// Copyright 2017 Google LLC
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package internal
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import (
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"fmt"
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"io/ioutil"
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"golang.org/x/net/context"
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"golang.org/x/oauth2/google"
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)
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// Creds returns credential information obtained from DialSettings, or if none, then
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// it returns default credential information.
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func Creds(ctx context.Context, ds *DialSettings) (*google.DefaultCredentials, error) {
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if ds.Credentials != nil {
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return ds.Credentials, nil
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}
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if ds.CredentialsJSON != nil {
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return google.CredentialsFromJSON(ctx, ds.CredentialsJSON, ds.Scopes...)
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}
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if ds.CredentialsFile != "" {
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data, err := ioutil.ReadFile(ds.CredentialsFile)
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if err != nil {
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return nil, fmt.Errorf("cannot read credentials file: %v", err)
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}
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return google.CredentialsFromJSON(ctx, data, ds.Scopes...)
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}
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if ds.TokenSource != nil {
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return &google.DefaultCredentials{TokenSource: ds.TokenSource}, nil
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}
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return google.FindDefaultCredentials(ctx, ds.Scopes...)
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}
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