Reduce duplicate code in wrappers for os
This commit is contained in:
Alexander Neumann
parent
b20921d836
commit
d965d703d1
4 changed files with 127 additions and 226 deletions
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@ -3,6 +3,8 @@ package fs
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import (
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"io"
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"os"
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"path/filepath"
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"runtime"
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)
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// File is an open file on a file system.
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@ -17,3 +19,113 @@ type File interface {
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Seek(int64, int) (int64, error)
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Stat() (os.FileInfo, error)
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}
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// fixpath returns an absolute path on windows, so restic can open long file
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// names.
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func fixpath(name string) string {
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if runtime.GOOS == "windows" {
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abspath, err := filepath.Abs(name)
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if err == nil {
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return "\\\\?\\" + abspath
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}
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}
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return name
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}
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// Chmod changes the mode of the named file to mode.
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func Chmod(name string, mode os.FileMode) error {
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return os.Chmod(fixpath(name), mode)
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}
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// Mkdir creates a new directory with the specified name and permission bits.
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// If there is an error, it will be of type *PathError.
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func Mkdir(name string, perm os.FileMode) error {
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return os.Mkdir(fixpath(name), perm)
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}
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// MkdirAll creates a directory named path,
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// along with any necessary parents, and returns nil,
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// or else returns an error.
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// The permission bits perm are used for all
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// directories that MkdirAll creates.
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// If path is already a directory, MkdirAll does nothing
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// and returns nil.
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func MkdirAll(path string, perm os.FileMode) error {
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return os.MkdirAll(fixpath(path), perm)
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}
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// Readlink returns the destination of the named symbolic link.
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// If there is an error, it will be of type *PathError.
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func Readlink(name string) (string, error) {
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return os.Readlink(fixpath(name))
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}
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// Remove removes the named file or directory.
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// If there is an error, it will be of type *PathError.
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func Remove(name string) error {
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return os.Remove(fixpath(name))
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}
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// RemoveAll removes path and any children it contains.
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// It removes everything it can but returns the first error
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// it encounters. If the path does not exist, RemoveAll
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// returns nil (no error).
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func RemoveAll(path string) error {
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return os.RemoveAll(fixpath(path))
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}
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// Rename renames (moves) oldpath to newpath.
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// If newpath already exists, Rename replaces it.
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// OS-specific restrictions may apply when oldpath and newpath are in different directories.
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// If there is an error, it will be of type *LinkError.
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func Rename(oldpath, newpath string) error {
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return os.Rename(fixpath(oldpath), fixpath(newpath))
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}
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// Symlink creates newname as a symbolic link to oldname.
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// If there is an error, it will be of type *LinkError.
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func Symlink(oldname, newname string) error {
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return os.Symlink(fixpath(oldname), fixpath(newname))
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}
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// Stat returns a FileInfo structure describing the named file.
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// If there is an error, it will be of type *PathError.
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func Stat(name string) (os.FileInfo, error) {
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return os.Stat(fixpath(name))
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}
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// Lstat returns the FileInfo structure describing the named file.
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// If the file is a symbolic link, the returned FileInfo
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// describes the symbolic link. Lstat makes no attempt to follow the link.
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// If there is an error, it will be of type *PathError.
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func Lstat(name string) (os.FileInfo, error) {
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return os.Lstat(fixpath(name))
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}
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// Create creates the named file with mode 0666 (before umask), truncating
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// it if it already exists. If successful, methods on the returned
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// File can be used for I/O; the associated file descriptor has mode
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// O_RDWR.
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// If there is an error, it will be of type *PathError.
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func Create(name string) (*os.File, error) {
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return os.Create(fixpath(name))
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}
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// OpenFile is the generalized open call; most users will use Open
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// or Create instead. It opens the named file with specified flag
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// (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful,
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// methods on the returned File can be used for I/O.
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// If there is an error, it will be of type *PathError.
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func OpenFile(name string, flag int, perm os.FileMode) (*os.File, error) {
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return os.OpenFile(fixpath(name), flag, perm)
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}
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// Walk walks the file tree rooted at root, calling walkFn for each file or
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// directory in the tree, including root. All errors that arise visiting files
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// and directories are filtered by walkFn. The files are walked in lexical
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// order, which makes the output deterministic but means that for very
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// large directories Walk can be inefficient.
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// Walk does not follow symbolic links.
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func Walk(root string, walkFn filepath.WalkFunc) error {
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return filepath.Walk(fixpath(root), walkFn)
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}
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@ -1,127 +0,0 @@
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// +build !linux !go1.4
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package fs
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import (
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"os"
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"path/filepath"
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"runtime"
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)
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func fixpath(name string) string {
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if runtime.GOOS == "windows" {
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abspath, err := filepath.Abs(name)
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if err == nil {
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return "\\\\?\\" + abspath
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}
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}
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return name
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}
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// Open opens a file for reading.
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func Open(name string) (File, error) {
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return os.OpenFile(fixpath(name), os.O_RDONLY, 0)
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}
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// ClearCache syncs and then removes the file's content from the OS cache.
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func ClearCache(f File) error {
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return nil
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}
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// Chmod changes the mode of the named file to mode.
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func Chmod(name string, mode os.FileMode) error {
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return os.Chmod(fixpath(name), mode)
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}
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// Mkdir creates a new directory with the specified name and permission bits.
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// If there is an error, it will be of type *PathError.
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func Mkdir(name string, perm os.FileMode) error {
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return os.Mkdir(fixpath(name), perm)
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}
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// MkdirAll creates a directory named path,
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// along with any necessary parents, and returns nil,
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// or else returns an error.
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// The permission bits perm are used for all
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// directories that MkdirAll creates.
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// If path is already a directory, MkdirAll does nothing
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// and returns nil.
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func MkdirAll(path string, perm os.FileMode) error {
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return os.MkdirAll(fixpath(path), perm)
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}
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// Readlink returns the destination of the named symbolic link.
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// If there is an error, it will be of type *PathError.
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func Readlink(name string) (string, error) {
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return os.Readlink(fixpath(name))
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}
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// Remove removes the named file or directory.
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// If there is an error, it will be of type *PathError.
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func Remove(name string) error {
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return os.Remove(fixpath(name))
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}
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// RemoveAll removes path and any children it contains.
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// It removes everything it can but returns the first error
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// it encounters. If the path does not exist, RemoveAll
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// returns nil (no error).
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func RemoveAll(path string) error {
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return os.RemoveAll(fixpath(path))
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}
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// Rename renames (moves) oldpath to newpath.
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// If newpath already exists, Rename replaces it.
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// OS-specific restrictions may apply when oldpath and newpath are in different directories.
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// If there is an error, it will be of type *LinkError.
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func Rename(oldpath, newpath string) error {
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return os.Rename(fixpath(oldpath), fixpath(newpath))
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}
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// Symlink creates newname as a symbolic link to oldname.
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// If there is an error, it will be of type *LinkError.
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func Symlink(oldname, newname string) error {
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return os.Symlink(fixpath(oldname), fixpath(newname))
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}
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// Stat returns a FileInfo structure describing the named file.
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// If there is an error, it will be of type *PathError.
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func Stat(name string) (os.FileInfo, error) {
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return os.Stat(fixpath(name))
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}
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// Lstat returns the FileInfo structure describing the named file.
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// If the file is a symbolic link, the returned FileInfo
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// describes the symbolic link. Lstat makes no attempt to follow the link.
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// If there is an error, it will be of type *PathError.
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func Lstat(name string) (os.FileInfo, error) {
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return os.Lstat(fixpath(name))
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}
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// Create creates the named file with mode 0666 (before umask), truncating
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// it if it already exists. If successful, methods on the returned
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// File can be used for I/O; the associated file descriptor has mode
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// O_RDWR.
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// If there is an error, it will be of type *PathError.
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func Create(name string) (*os.File, error) {
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return os.Create(fixpath(name))
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}
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// OpenFile is the generalized open call; most users will use Open
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// or Create instead. It opens the named file with specified flag
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// (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful,
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// methods on the returned File can be used for I/O.
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// If there is an error, it will be of type *PathError.
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func OpenFile(name string, flag int, perm os.FileMode) (*os.File, error) {
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return os.OpenFile(fixpath(name), flag, perm)
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}
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// Walk walks the file tree rooted at root, calling walkFn for each file or
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// directory in the tree, including root. All errors that arise visiting files
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// and directories are filtered by walkFn. The files are walked in lexical
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// order, which makes the output deterministic but means that for very
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// large directories Walk can be inefficient.
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// Walk does not follow symbolic links.
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func Walk(root string, walkFn filepath.WalkFunc) error {
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return filepath.Walk(fixpath(root), walkFn)
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}
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@ -4,7 +4,6 @@ package fs
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import (
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"os"
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"path/filepath"
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"syscall"
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"golang.org/x/sys/unix"
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@ -56,101 +55,3 @@ func ClearCache(file File) error {
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return unix.Fadvise(int(f.Fd()), 0, 0, unix.FADV_DONTNEED)
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}
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// Chmod changes the mode of the named file to mode.
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func Chmod(name string, mode os.FileMode) error {
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return os.Chmod(name, mode)
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}
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// Mkdir creates a new directory with the specified name and permission bits.
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// If there is an error, it will be of type *PathError.
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func Mkdir(name string, perm os.FileMode) error {
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return os.Mkdir(name, perm)
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}
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// MkdirAll creates a directory named path,
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// along with any necessary parents, and returns nil,
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// or else returns an error.
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// The permission bits perm are used for all
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// directories that MkdirAll creates.
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// If path is already a directory, MkdirAll does nothing
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// and returns nil.
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func MkdirAll(path string, perm os.FileMode) error {
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return os.MkdirAll(path, perm)
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}
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// Readlink returns the destination of the named symbolic link.
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// If there is an error, it will be of type *PathError.
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func Readlink(name string) (string, error) {
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return os.Readlink(name)
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}
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// Remove removes the named file or directory.
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// If there is an error, it will be of type *PathError.
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func Remove(name string) error {
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return os.Remove(name)
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}
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// RemoveAll removes path and any children it contains.
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// It removes everything it can but returns the first error
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// it encounters. If the path does not exist, RemoveAll
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// returns nil (no error).
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func RemoveAll(path string) error {
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return os.RemoveAll(path)
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}
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// Rename renames (moves) oldpath to newpath.
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// If newpath already exists, Rename replaces it.
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// OS-specific restrictions may apply when oldpath and newpath are in different directories.
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// If there is an error, it will be of type *LinkError.
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func Rename(oldpath, newpath string) error {
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return os.Rename(oldpath, newpath)
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}
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// Symlink creates newname as a symbolic link to oldname.
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// If there is an error, it will be of type *LinkError.
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func Symlink(oldname, newname string) error {
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return os.Symlink(oldname, newname)
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}
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// Stat returns a FileInfo structure describing the named file.
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// If there is an error, it will be of type *PathError.
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func Stat(name string) (os.FileInfo, error) {
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return os.Stat(name)
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}
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// Lstat returns the FileInfo structure describing the named file.
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// If the file is a symbolic link, the returned FileInfo
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// describes the symbolic link. Lstat makes no attempt to follow the link.
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// If there is an error, it will be of type *PathError.
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func Lstat(name string) (os.FileInfo, error) {
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return os.Lstat(name)
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}
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// Create creates the named file with mode 0666 (before umask), truncating
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// it if it already exists. If successful, methods on the returned
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// File can be used for I/O; the associated file descriptor has mode
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// O_RDWR.
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// If there is an error, it will be of type *PathError.
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func Create(name string) (*os.File, error) {
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return os.Create(name)
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}
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// OpenFile is the generalized open call; most users will use Open
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// or Create instead. It opens the named file with specified flag
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// (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful,
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// methods on the returned File can be used for I/O.
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// If there is an error, it will be of type *PathError.
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func OpenFile(name string, flag int, perm os.FileMode) (*os.File, error) {
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return os.OpenFile(name, flag, perm)
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}
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// Walk walks the file tree rooted at root, calling walkFn for each file or
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// directory in the tree, including root. All errors that arise visiting files
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// and directories are filtered by walkFn. The files are walked in lexical
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// order, which makes the output deterministic but means that for very
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// large directories Walk can be inefficient.
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// Walk does not follow symbolic links.
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func Walk(root string, walkFn filepath.WalkFunc) error {
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return filepath.Walk(root, walkFn)
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}
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15
src/restic/fs/file_nonlinux.go
Normal file
15
src/restic/fs/file_nonlinux.go
Normal file
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@ -0,0 +1,15 @@
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// +build !linux !go1.4
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package fs
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import "os"
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// Open opens a file for reading.
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func Open(name string) (File, error) {
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return os.OpenFile(fixpath(name), os.O_RDONLY, 0)
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}
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// ClearCache syncs and then removes the file's content from the OS cache.
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func ClearCache(f File) error {
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return nil
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}
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