mirror of https://github.com/gohugoio/hugo
111 lines
2.3 KiB
Go
111 lines
2.3 KiB
Go
// Copyright 2024 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package hugofs
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import (
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"io/fs"
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"os"
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"sync"
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"github.com/spf13/afero"
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)
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var _ FilesystemUnwrapper = (*OpenFilesFs)(nil)
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// OpenFilesFs is a wrapper around afero.Fs that keeps track of open files.
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type OpenFilesFs struct {
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afero.Fs
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mu sync.Mutex
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openFiles map[string]int
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}
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func (fs *OpenFilesFs) UnwrapFilesystem() afero.Fs {
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return fs.Fs
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}
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func (fs *OpenFilesFs) Create(name string) (afero.File, error) {
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f, err := fs.Fs.Create(name)
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if err != nil {
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return nil, err
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}
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return fs.trackAndWrapFile(f), nil
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}
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func (fs *OpenFilesFs) Open(name string) (afero.File, error) {
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f, err := fs.Fs.Open(name)
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if err != nil {
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return nil, err
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}
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return fs.trackAndWrapFile(f), nil
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}
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func (fs *OpenFilesFs) OpenFile(name string, flag int, perm os.FileMode) (afero.File, error) {
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f, err := fs.Fs.OpenFile(name, flag, perm)
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if err != nil {
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return nil, err
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}
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return fs.trackAndWrapFile(f), nil
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}
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func (fs *OpenFilesFs) trackAndWrapFile(f afero.File) afero.File {
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fs.mu.Lock()
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defer fs.mu.Unlock()
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if fs.openFiles == nil {
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fs.openFiles = make(map[string]int)
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}
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fs.openFiles[f.Name()]++
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return &openFilesFsFile{fs: fs, File: f}
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}
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type openFilesFsFile struct {
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fs *OpenFilesFs
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afero.File
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}
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func (f *openFilesFsFile) ReadDir(count int) ([]fs.DirEntry, error) {
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return f.File.(fs.ReadDirFile).ReadDir(count)
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}
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func (f *openFilesFsFile) Close() (err error) {
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f.fs.mu.Lock()
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defer f.fs.mu.Unlock()
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err = f.File.Close()
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if f.fs.openFiles == nil {
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return
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}
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name := f.Name()
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f.fs.openFiles[name]--
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if f.fs.openFiles[name] <= 0 {
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delete(f.fs.openFiles, name)
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}
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return
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}
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func (fs *OpenFilesFs) OpenFiles() map[string]int {
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fs.mu.Lock()
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defer fs.mu.Unlock()
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return fs.openFiles
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}
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