| // Copyright 2014 Google 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 driver |
| |
| import ( |
| "fmt" |
| "os" |
| "path/filepath" |
| "sync" |
| ) |
| |
| // newTempFile returns a new output file in dir with the provided prefix and suffix. |
| func newTempFile(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{} |
| |
| // deferDeleteTempFile marks a file to be deleted by next call to Cleanup() |
| func deferDeleteTempFile(path string) { |
| tempFilesMu.Lock() |
| tempFiles = append(tempFiles, path) |
| tempFilesMu.Unlock() |
| } |
| |
| // cleanupTempFiles removes any temporary files selected for deferred cleaning. |
| func cleanupTempFiles() { |
| tempFilesMu.Lock() |
| for _, f := range tempFiles { |
| os.Remove(f) |
| } |
| tempFiles = nil |
| tempFilesMu.Unlock() |
| } |