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// Copyright 2013 Google Inc. All rights reserved.
// Copyright 2016 the gousb Authors. 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 gousb
// To enable internal debugging, set the GOUSB_DEBUG environment variable.
import (
"io"
"io/ioutil"
"log" // TODO(kevlar): make a logger
"os"
)
var debug *log.Logger
const debugEnvVarName = "GOUSB_DEBUG"
func init() {
out := io.Writer(ioutil.Discard)
if os.Getenv(debugEnvVarName) != "" {
out = os.Stderr
}
debug = log.New(out, "gousb: ", log.LstdFlags|log.Lshortfile)
}
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