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// Package osfs provides a billy filesystem for the OS.
package osfs // import "gopkg.in/src-d/go-billy.v4/osfs"
import (
"io/ioutil"
"os"
"path/filepath"
"sync"
"gopkg.in/src-d/go-billy.v4"
"gopkg.in/src-d/go-billy.v4/helper/chroot"
)
const (
defaultDirectoryMode = 0755
defaultCreateMode = 0666
)
// OS is a filesystem based on the os filesystem.
type OS struct{}
// New returns a new OS filesystem.
func New(baseDir string) billy.Filesystem {
return chroot.New(&OS{}, baseDir)
}
func (fs *OS) Create(filename string) (billy.File, error) {
return fs.OpenFile(filename, os.O_RDWR|os.O_CREATE|os.O_TRUNC, defaultCreateMode)
}
func (fs *OS) OpenFile(filename string, flag int, perm os.FileMode) (billy.File, error) {
if flag&os.O_CREATE != 0 {
if err := fs.createDir(filename); err != nil {
return nil, err
}
}
f, err := os.OpenFile(filename, flag, perm)
if err != nil {
return nil, err
}
return &file{File: f}, err
}
func (fs *OS) createDir(fullpath string) error {
dir := filepath.Dir(fullpath)
if dir != "." {
if err := os.MkdirAll(dir, defaultDirectoryMode); err != nil {
return err
}
}
return nil
}
func (fs *OS) ReadDir(path string) ([]os.FileInfo, error) {
l, err := ioutil.ReadDir(path)
if err != nil {
return nil, err
}
var s = make([]os.FileInfo, len(l))
for i, f := range l {
s[i] = f
}
return s, nil
}
func (fs *OS) Rename(from, to string) error {
if err := fs.createDir(to); err != nil {
return err
}
return os.Rename(from, to)
}
func (fs *OS) MkdirAll(path string, perm os.FileMode) error {
return os.MkdirAll(path, defaultDirectoryMode)
}
func (fs *OS) Open(filename string) (billy.File, error) {
return fs.OpenFile(filename, os.O_RDONLY, 0)
}
func (fs *OS) Stat(filename string) (os.FileInfo, error) {
return os.Stat(filename)
}
func (fs *OS) Remove(filename string) error {
return os.Remove(filename)
}
func (fs *OS) TempFile(dir, prefix string) (billy.File, error) {
if err := fs.createDir(dir + string(os.PathSeparator)); err != nil {
return nil, err
}
f, err := ioutil.TempFile(dir, prefix)
if err != nil {
return nil, err
}
return &file{File: f}, nil
}
func (fs *OS) Join(elem ...string) string {
return filepath.Join(elem...)
}
func (fs *OS) RemoveAll(path string) error {
return os.RemoveAll(filepath.Clean(path))
}
func (fs *OS) Lstat(filename string) (os.FileInfo, error) {
return os.Lstat(filepath.Clean(filename))
}
func (fs *OS) Symlink(target, link string) error {
if err := fs.createDir(link); err != nil {
return err
}
return os.Symlink(target, link)
}
func (fs *OS) Readlink(link string) (string, error) {
return os.Readlink(link)
}
// Capabilities implements the Capable interface.
func (fs *OS) Capabilities() billy.Capability {
return billy.DefaultCapabilities
}
// file is a wrapper for an os.File which adds support for file locking.
type file struct {
*os.File
m sync.Mutex
}
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