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54 lines
1.6 KiB
54 lines
1.6 KiB
// Copyright 2017 Google Inc. All Rights Reserved. |
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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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"google.golang.org/api/googleapi" |
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"google.golang.org/grpc/status" |
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) |
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// Annotate prepends msg to the error message in err, attempting |
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// to preserve other information in err, like an error code. |
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// |
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// Annotate panics if err is nil. |
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// |
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// Annotate knows about these error types: |
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// - "google.golang.org/grpc/status".Status |
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// - "google.golang.org/api/googleapi".Error |
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// If the error is not one of these types, Annotate behaves |
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// like |
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// fmt.Errorf("%s: %v", msg, err) |
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func Annotate(err error, msg string) error { |
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if err == nil { |
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panic("Annotate called with nil") |
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} |
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if s, ok := status.FromError(err); ok { |
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p := s.Proto() |
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p.Message = msg + ": " + p.Message |
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return status.ErrorProto(p) |
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} |
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if g, ok := err.(*googleapi.Error); ok { |
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g.Message = msg + ": " + g.Message |
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return g |
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} |
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return fmt.Errorf("%s: %v", msg, err) |
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} |
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// Annotatef uses format and args to format a string, then calls Annotate. |
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func Annotatef(err error, format string, args ...interface{}) error { |
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return Annotate(err, fmt.Sprintf(format, args...)) |
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}
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