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-rw-r--r--vendor/go4.org/wkfs/wkfs.go135
1 files changed, 0 insertions, 135 deletions
diff --git a/vendor/go4.org/wkfs/wkfs.go b/vendor/go4.org/wkfs/wkfs.go
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--- a/vendor/go4.org/wkfs/wkfs.go
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@@ -1,135 +0,0 @@
-/*
-Copyright 2014 The Perkeep Authors
-
-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 wkfs implements the pluggable "well-known filesystem" abstraction layer.
-//
-// Instead of accessing files directly through the operating system
-// using os.Open or os.Stat, code should use wkfs.Open or wkfs.Stat,
-// which first try to intercept paths at well-known top-level
-// directories representing previously-registered mount types,
-// otherwise fall through to the operating system paths.
-//
-// Example of top-level well-known directories that might be
-// registered include /gcs/bucket/object for Google Cloud Storage or
-// /s3/bucket/object for AWS S3.
-package wkfs // import "go4.org/wkfs"
-
-import (
- "io"
- "io/ioutil"
- "os"
- "strings"
-)
-
-type File interface {
- io.Reader
- io.ReaderAt
- io.Closer
- io.Seeker
- Name() string
- Stat() (os.FileInfo, error)
-}
-
-type FileWriter interface {
- io.Writer
- io.Closer
-}
-
-func Open(name string) (File, error) { return fs(name).Open(name) }
-func Stat(name string) (os.FileInfo, error) { return fs(name).Stat(name) }
-func Lstat(name string) (os.FileInfo, error) { return fs(name).Lstat(name) }
-func MkdirAll(path string, perm os.FileMode) error { return fs(path).MkdirAll(path, perm) }
-func OpenFile(name string, flag int, perm os.FileMode) (FileWriter, error) {
- return fs(name).OpenFile(name, flag, perm)
-}
-func Remove(name string) error { return fs(name).Remove(name) }
-func Create(name string) (FileWriter, error) {
- // like os.Create but WRONLY instead of RDWR because we don't
- // expose a Reader here.
- return OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0666)
-}
-
-func fs(name string) FileSystem {
- for pfx, fs := range wkFS {
- if strings.HasPrefix(name, pfx) {
- return fs
- }
- }
- return osFS{}
-}
-
-type osFS struct{}
-
-func (osFS) Open(name string) (File, error) { return os.Open(name) }
-func (osFS) Stat(name string) (os.FileInfo, error) { return os.Stat(name) }
-func (osFS) Lstat(name string) (os.FileInfo, error) { return os.Lstat(name) }
-func (osFS) MkdirAll(path string, perm os.FileMode) error { return os.MkdirAll(path, perm) }
-func (osFS) OpenFile(name string, flag int, perm os.FileMode) (FileWriter, error) {
- return os.OpenFile(name, flag, perm)
-}
-func (osFS) Remove(name string) error { return os.Remove(name) }
-
-type FileSystem interface {
- Open(name string) (File, error)
- OpenFile(name string, flag int, perm os.FileMode) (FileWriter, error)
- Stat(name string) (os.FileInfo, error)
- Lstat(name string) (os.FileInfo, error)
- MkdirAll(path string, perm os.FileMode) error
- Remove(name string) error
-}
-
-// well-known filesystems
-var wkFS = map[string]FileSystem{}
-
-// RegisterFS registers a well-known filesystem. It intercepts
-// anything beginning with prefix (which must start and end with a
-// forward slash) and forwards it to fs.
-func RegisterFS(prefix string, fs FileSystem) {
- if !strings.HasPrefix(prefix, "/") || !strings.HasSuffix(prefix, "/") {
- panic("bogus prefix: " + prefix)
- }
- if _, dup := wkFS[prefix]; dup {
- panic("duplication registration of " + prefix)
- }
- wkFS[prefix] = fs
-}
-
-// WriteFile writes data to a file named by filename.
-// If the file does not exist, WriteFile creates it with permissions perm;
-// otherwise WriteFile truncates it before writing.
-func WriteFile(filename string, data []byte, perm os.FileMode) error {
- f, err := OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
- if err != nil {
- return err
- }
- n, err := f.Write(data)
- if err == nil && n < len(data) {
- err = io.ErrShortWrite
- }
- if err1 := f.Close(); err == nil {
- err = err1
- }
- return err
-}
-
-func ReadFile(filename string) ([]byte, error) {
- f, err := Open(filename)
- if err != nil {
- return nil, err
- }
- defer f.Close()
- return ioutil.ReadAll(f)
-}