-
Notifications
You must be signed in to change notification settings - Fork 300
/
pkg_util.go
44 lines (40 loc) · 1.41 KB
/
pkg_util.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
// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// 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 errors
import (
"runtime"
"strings"
)
var pkgPrefix = func() string {
pc, _, _, ok := runtime.Caller(1)
if !ok {
panic("could not determine package of pkg_util.go")
}
p := strings.TrimSuffix(runtime.FuncForPC(pc).Name(), "pkg/errors.init")
return p
}()
// namespace is called when errors are defined.
// It returns the package path of the caller (skipping the first frames of the call stack)
// and makes it relative (so for example: pkg/errors).
func namespace(skip int) string {
pc, _, _, ok := runtime.Caller(skip)
if !ok {
panic("could not determine source of error")
}
fun := runtime.FuncForPC(pc).Name()
slashIdx := strings.LastIndexByte(fun, '/')
dotIdx := strings.IndexByte(fun[slashIdx:], '.')
pkg := fun[:slashIdx+dotIdx]
return strings.TrimPrefix(pkg, pkgPrefix)
}