82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
|
/*
|
||
|
|
Copyright (c) 2014 VMware, 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 debug
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
"os"
|
||
|
|
"path"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Provider specified the interface types must implement to be used as a
|
||
|
|
// debugging sink. Having multiple such sink implementations allows it to be
|
||
|
|
// changed externally (for example when running tests).
|
||
|
|
type Provider interface {
|
||
|
|
NewFile(s string) io.WriteCloser
|
||
|
|
Flush()
|
||
|
|
}
|
||
|
|
|
||
|
|
var currentProvider Provider = nil
|
||
|
|
|
||
|
|
func SetProvider(p Provider) {
|
||
|
|
if currentProvider != nil {
|
||
|
|
currentProvider.Flush()
|
||
|
|
}
|
||
|
|
currentProvider = p
|
||
|
|
}
|
||
|
|
|
||
|
|
// Enabled returns whether debugging is enabled or not.
|
||
|
|
func Enabled() bool {
|
||
|
|
return currentProvider != nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewFile dispatches to the current provider's NewFile function.
|
||
|
|
func NewFile(s string) io.WriteCloser {
|
||
|
|
return currentProvider.NewFile(s)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Flush dispatches to the current provider's Flush function.
|
||
|
|
func Flush() {
|
||
|
|
currentProvider.Flush()
|
||
|
|
}
|
||
|
|
|
||
|
|
// FileProvider implements a debugging provider that creates a real file for
|
||
|
|
// every call to NewFile. It maintains a list of all files that it creates,
|
||
|
|
// such that it can close them when its Flush function is called.
|
||
|
|
type FileProvider struct {
|
||
|
|
Path string
|
||
|
|
|
||
|
|
files []*os.File
|
||
|
|
}
|
||
|
|
|
||
|
|
func (fp *FileProvider) NewFile(p string) io.WriteCloser {
|
||
|
|
f, err := os.Create(path.Join(fp.Path, p))
|
||
|
|
if err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
fp.files = append(fp.files, f)
|
||
|
|
|
||
|
|
return f
|
||
|
|
}
|
||
|
|
|
||
|
|
func (fp *FileProvider) Flush() {
|
||
|
|
for _, f := range fp.files {
|
||
|
|
f.Close()
|
||
|
|
}
|
||
|
|
}
|