42 lines
1.4 KiB
Go
42 lines
1.4 KiB
Go
// Copyright 2017 Google Inc. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package internal
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
|
|
"golang.org/x/net/context"
|
|
"golang.org/x/oauth2/google"
|
|
)
|
|
|
|
// Creds returns credential information obtained from DialSettings, or if none, then
|
|
// it returns default credential information.
|
|
func Creds(ctx context.Context, ds *DialSettings) (*google.DefaultCredentials, error) {
|
|
if ds.Credentials != nil {
|
|
return ds.Credentials, nil
|
|
}
|
|
if ds.CredentialsFile != "" {
|
|
data, err := ioutil.ReadFile(ds.CredentialsFile)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot read credentials file: %v", err)
|
|
}
|
|
return google.CredentialsFromJSON(ctx, data, ds.Scopes...)
|
|
}
|
|
if ds.TokenSource != nil {
|
|
return &google.DefaultCredentials{TokenSource: ds.TokenSource}, nil
|
|
}
|
|
return google.FindDefaultCredentials(ctx, ds.Scopes...)
|
|
}
|