+++ /dev/null
-// Copyright 2013 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 vfs
-
-import (
- "fmt"
- "go/build"
- "io/ioutil"
- "os"
- pathpkg "path"
- "path/filepath"
- "runtime"
-)
-
-// We expose a new variable because otherwise we need to copy the findGOROOT logic again
-// from cmd/godoc which is already copied twice from the standard library.
-
-// GOROOT is the GOROOT path under which the godoc binary is running.
-// It is needed to check whether a filesystem root is under GOROOT or not.
-// This is set from cmd/godoc/main.go.
-var GOROOT = runtime.GOROOT()
-
-// OS returns an implementation of FileSystem reading from the
-// tree rooted at root. Recording a root is convenient everywhere
-// but necessary on Windows, because the slash-separated path
-// passed to Open has no way to specify a drive letter. Using a root
-// lets code refer to OS(`c:\`), OS(`d:\`) and so on.
-func OS(root string) FileSystem {
- var t RootType
- switch {
- case root == GOROOT:
- t = RootTypeGoRoot
- case isGoPath(root):
- t = RootTypeGoPath
- }
- return osFS{rootPath: root, rootType: t}
-}
-
-type osFS struct {
- rootPath string
- rootType RootType
-}
-
-func isGoPath(path string) bool {
- for _, bp := range filepath.SplitList(build.Default.GOPATH) {
- for _, gp := range filepath.SplitList(path) {
- if bp == gp {
- return true
- }
- }
- }
- return false
-}
-
-func (root osFS) String() string { return "os(" + root.rootPath + ")" }
-
-// RootType returns the root type for the filesystem.
-//
-// Note that we ignore the path argument because roottype is a property of
-// this filesystem. But for other filesystems, the roottype might need to be
-// dynamically deduced at call time.
-func (root osFS) RootType(path string) RootType {
- return root.rootType
-}
-
-func (root osFS) resolve(path string) string {
- // Clean the path so that it cannot possibly begin with ../.
- // If it did, the result of filepath.Join would be outside the
- // tree rooted at root. We probably won't ever see a path
- // with .. in it, but be safe anyway.
- path = pathpkg.Clean("/" + path)
-
- return filepath.Join(root.rootPath, path)
-}
-
-func (root osFS) Open(path string) (ReadSeekCloser, error) {
- f, err := os.Open(root.resolve(path))
- if err != nil {
- return nil, err
- }
- fi, err := f.Stat()
- if err != nil {
- f.Close()
- return nil, err
- }
- if fi.IsDir() {
- f.Close()
- return nil, fmt.Errorf("Open: %s is a directory", path)
- }
- return f, nil
-}
-
-func (root osFS) Lstat(path string) (os.FileInfo, error) {
- return os.Lstat(root.resolve(path))
-}
-
-func (root osFS) Stat(path string) (os.FileInfo, error) {
- return os.Stat(root.resolve(path))
-}
-
-func (root osFS) ReadDir(path string) ([]os.FileInfo, error) {
- return ioutil.ReadDir(root.resolve(path)) // is sorted
-}