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// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package tempfile provides tools to create and delete temporary files
package tempfile
import (
"fmt"
"os"
"path/filepath"
"sync"
)
// New returns an unused filename for output files.
func New(dir, prefix, suffix string) (*os.File, error) {
for index := 1; index < 10000; index++ {
path := filepath.Join(dir, fmt.Sprintf("%s%03d%s", prefix, index, suffix))
if _, err := os.Stat(path); err != nil {
return os.Create(path)
}
}
// Give up
return nil, fmt.Errorf("could not create file of the form %s%03d%s", prefix, 1, suffix)
}
var tempFiles []string
var tempFilesMu = sync.Mutex{}
// DeferDelete marks a file to be deleted by next call to Cleanup()
func DeferDelete(path string) {
tempFilesMu.Lock()
tempFiles = append(tempFiles, path)
tempFilesMu.Unlock()
}
// Cleanup removes any temporary files selected for deferred cleaning.
func Cleanup() {
tempFilesMu.Lock()
for _, f := range tempFiles {
os.Remove(f)
}
tempFiles = nil
tempFilesMu.Unlock()
}
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