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146 lines
3.5 KiB
Go
146 lines
3.5 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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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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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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*/
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package filesystem
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import (
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"os"
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"path/filepath"
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"strings"
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"time"
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)
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// DefaultFs implements Filesystem using same-named functions from "os" and "io"
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type DefaultFs struct {
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root string
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}
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var _ Filesystem = &DefaultFs{}
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// NewTempFs returns a fake Filesystem in temporary directory, useful for unit tests
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func NewTempFs() Filesystem {
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path, _ := os.MkdirTemp("", "tmpfs")
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return &DefaultFs{
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root: path,
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}
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}
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func (fs *DefaultFs) prefix(path string) string {
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if len(fs.root) == 0 {
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return path
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}
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return filepath.Join(fs.root, path)
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}
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// Stat via os.Stat
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func (fs *DefaultFs) Stat(name string) (os.FileInfo, error) {
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return os.Stat(fs.prefix(name))
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}
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// Create via os.Create
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func (fs *DefaultFs) Create(name string) (File, error) {
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file, err := os.Create(fs.prefix(name))
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if err != nil {
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return nil, err
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}
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return &defaultFile{file}, nil
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}
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// Rename via os.Rename
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func (fs *DefaultFs) Rename(oldpath, newpath string) error {
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if !strings.HasPrefix(oldpath, fs.root) {
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oldpath = fs.prefix(oldpath)
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}
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if !strings.HasPrefix(newpath, fs.root) {
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newpath = fs.prefix(newpath)
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}
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return os.Rename(oldpath, newpath)
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}
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// MkdirAll via os.MkdirAll
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func (fs *DefaultFs) MkdirAll(path string, perm os.FileMode) error {
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return os.MkdirAll(fs.prefix(path), perm)
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}
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// Chtimes via os.Chtimes
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func (fs *DefaultFs) Chtimes(name string, atime time.Time, mtime time.Time) error {
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return os.Chtimes(fs.prefix(name), atime, mtime)
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}
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// RemoveAll via os.RemoveAll
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func (fs *DefaultFs) RemoveAll(path string) error {
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return os.RemoveAll(fs.prefix(path))
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}
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// Remove via os.Remove
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func (fs *DefaultFs) Remove(name string) error {
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return os.Remove(fs.prefix(name))
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}
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// ReadFile via os.ReadFile
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func (fs *DefaultFs) ReadFile(filename string) ([]byte, error) {
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return os.ReadFile(fs.prefix(filename))
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}
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// TempDir via os.MkdirTemp
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func (fs *DefaultFs) TempDir(dir, prefix string) (string, error) {
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return os.MkdirTemp(fs.prefix(dir), prefix)
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}
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// TempFile via os.CreateTemp
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func (fs *DefaultFs) TempFile(dir, prefix string) (File, error) {
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file, err := os.CreateTemp(fs.prefix(dir), prefix)
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if err != nil {
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return nil, err
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}
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return &defaultFile{file}, nil
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}
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// ReadDir via os.ReadDir
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func (fs *DefaultFs) ReadDir(dirname string) ([]os.DirEntry, error) {
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return os.ReadDir(fs.prefix(dirname))
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}
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// Walk via filepath.Walk
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func (fs *DefaultFs) Walk(root string, walkFn filepath.WalkFunc) error {
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return filepath.Walk(fs.prefix(root), walkFn)
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}
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// defaultFile implements File using same-named functions from "os"
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type defaultFile struct {
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file *os.File
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}
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// Name via os.File.Name
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func (file *defaultFile) Name() string {
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return file.file.Name()
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}
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// Write via os.File.Write
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func (file *defaultFile) Write(b []byte) (n int, err error) {
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return file.file.Write(b)
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}
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// Sync via os.File.Sync
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func (file *defaultFile) Sync() error {
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return file.file.Sync()
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}
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// Close via os.File.Close
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func (file *defaultFile) Close() error {
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return file.file.Close()
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}
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