-
Notifications
You must be signed in to change notification settings - Fork 1
/
error.go
190 lines (171 loc) · 4.78 KB
/
error.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
// Copyright 2024 Buf Technologies, Inc.
//
// 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 pluginrpc
import (
"errors"
"fmt"
"strings"
pluginrpcv1 "buf.build/gen/go/pluginrpc/pluginrpc/protocolbuffers/go/pluginrpc/v1"
)
// TODO: Figure out when and where to wrap errors created by this package with Errors.
// Error is an error with a Code.
type Error struct {
code Code
underlying error
}
// NewError returns a new Error.
//
// Code and underlying with a non-empty message are required.
//
// An Error will never have an invalid Code or nil underlying error
// when returned from this function.
func NewError(code Code, underlying error) *Error {
return validateError(
&Error{
code: code,
underlying: underlying,
},
)
}
// NewErrorf returns a new Error.
// Code and a non-empty message are required.
//
// An Error will never have an invalid Code or nil underlying error
// when returned from this function.
func NewErrorf(code Code, format string, args ...any) *Error {
return NewError(code, fmt.Errorf(format, args...))
}
// NewErrorForProto returns a new Error for the given pluginrpcv1.Error.
//
// If protoError is nil, this returns nil.
func NewErrorForProto(protoError *pluginrpcv1.Error) *Error {
if protoError == nil {
return nil
}
code, err := CodeForProto(protoError.GetCode())
if err != nil {
return NewError(
CodeInternal,
fmt.Errorf("Error created with invalid code: %s: %w", protoError.GetMessage(), err),
)
}
return NewError(
code,
errors.New(protoError.GetMessage()),
)
}
// WrapError wraps the given error as a Error.
//
// If the given error is nil, this returns nil.
// If the given error is already a Error, this is returned.
// Otherwise, an error with code CodeUnknown is returned.
//
// An Error will never have an invalid Code when returned from this function.
func WrapError(err error) *Error {
if err == nil {
return nil
}
pluginrpcError := &Error{}
if errors.As(err, &pluginrpcError) {
return validateError(pluginrpcError)
}
return NewError(CodeUnknown, err)
}
// Code returns the error code.
//
// If e is nil, this returns 0.
func (e *Error) Code() Code {
if e == nil {
return Code(0)
}
return e.code
}
// ToProto converts the Error to a pluginrpcv1.Error.
//
// If e is nil, this returns nil.
func (e *Error) ToProto() *pluginrpcv1.Error {
if e == nil {
return nil
}
pluginrpcError := validateError(e)
protoCode, err := pluginrpcError.Code().ToProto()
if err != nil {
return &pluginrpcv1.Error{
Code: pluginrpcv1.Code_CODE_INTERNAL,
Message: fmt.Sprintf("Error created with invalid code: %s: %s", e.underlying.Error(), err.Error()),
}
}
return &pluginrpcv1.Error{
Code: protoCode,
Message: pluginrpcError.Unwrap().Error(),
}
}
// Error implements error.
//
// If e is nil, this returns the empty string.
func (e *Error) Error() string {
if e == nil {
return ""
}
var sb strings.Builder
_, _ = sb.WriteString(`Failed with code `)
_, _ = sb.WriteString(e.code.String())
if e.underlying != nil {
_, _ = sb.WriteString(`: `)
_, _ = sb.WriteString(e.underlying.Error())
}
return sb.String()
}
// Unwrap implements error.
//
// If e is nil, this returns nil.
func (e *Error) Unwrap() error {
if e == nil {
return nil
}
return e.underlying
}
// *** PRIVATE ***
func validateError(pluginrpcError *Error) *Error {
code := pluginrpcError.Code()
underlying := pluginrpcError.Unwrap()
if !isValidCode(code) {
return newInvalidCodeError(pluginrpcError)
}
if underlying == nil {
return newNilUnderlyingError(pluginrpcError)
}
if underlyingString := underlying.Error(); underlyingString == "" {
return newEmptyUnderlyingError(pluginrpcError)
}
return pluginrpcError
}
func newInvalidCodeError(pluginrpcError *Error) *Error {
return &Error{
code: CodeInternal,
underlying: fmt.Errorf("Error created with code %v: %w", pluginrpcError.Code(), pluginrpcError.Unwrap()),
}
}
func newNilUnderlyingError(pluginrpcError *Error) *Error {
return &Error{
code: CodeInternal,
underlying: fmt.Errorf("Error created with code %v and nil underlying error", pluginrpcError.Code()),
}
}
func newEmptyUnderlyingError(pluginrpcError *Error) *Error {
return &Error{
code: CodeInternal,
underlying: fmt.Errorf("Error created with code %v and empty underlying error", pluginrpcError.Code()),
}
}