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/coverage.txt
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# go-billy [![GoDoc](https://godoc.org/gopkg.in/go-git/go-billy.v5?status.svg)](https://pkg.go.dev/github.com/go-git/go-billy) [![Test](https://github.com/go-git/go-billy/workflows/Test/badge.svg)](https://github.com/go-git/go-billy/actions?query=workflow%3ATest)
The missing interface filesystem abstraction for Go.
Billy implements an interface based on the `os` standard library, allowing to develop applications without dependency on the underlying storage. Makes it virtually free to implement mocks and testing over filesystem operations.
Billy was born as part of [go-git/go-git](https://github.com/go-git/go-git) project.
## Installation
```go
import "github.com/go-git/go-billy/v5" // with go modules enabled (GO111MODULE=on or outside GOPATH)
import "github.com/go-git/go-billy" // with go modules disabled
```
## Usage
Billy exposes filesystems using the
[`Filesystem` interface](https://pkg.go.dev/github.com/go-git/go-billy/v5?tab=doc#Filesystem).
Each filesystem implementation gives you a `New` method, whose arguments depend on
the implementation itself, that returns a new `Filesystem`.
The following example caches in memory all readable files in a directory from any
billy's filesystem implementation.
```go
func LoadToMemory(origin billy.Filesystem, path string) (*memory.Memory, error) {
memory := memory.New()
files, err := origin.ReadDir("/")
if err != nil {
return nil, err
}
for _, file := range files {
if file.IsDir() {
continue
}
src, err := origin.Open(file.Name())
if err != nil {
return nil, err
}
dst, err := memory.Create(file.Name())
if err != nil {
return nil, err
}
if _, err = io.Copy(dst, src); err != nil {
return nil, err
}
if err := dst.Close(); err != nil {
return nil, err
}
if err := src.Close(); err != nil {
return nil, err
}
}
return memory, nil
}
```
## Why billy?
The library billy deals with storage systems and Billy is the name of a well-known, IKEA
bookcase. That's it.
## License
Apache License Version 2.0, see [LICENSE](LICENSE)

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package billy
import (
"errors"
"io"
"os"
"time"
)
var (
ErrReadOnly = errors.New("read-only filesystem")
ErrNotSupported = errors.New("feature not supported")
ErrCrossedBoundary = errors.New("chroot boundary crossed")
)
// Capability holds the supported features of a billy filesystem. This does
// not mean that the capability has to be supported by the underlying storage.
// For example, a billy filesystem may support WriteCapability but the
// storage be mounted in read only mode.
type Capability uint64
const (
// WriteCapability means that the fs is writable.
WriteCapability Capability = 1 << iota
// ReadCapability means that the fs is readable.
ReadCapability
// ReadAndWriteCapability is the ability to open a file in read and write mode.
ReadAndWriteCapability
// SeekCapability means it is able to move position inside the file.
SeekCapability
// TruncateCapability means that a file can be truncated.
TruncateCapability
// LockCapability is the ability to lock a file.
LockCapability
// DefaultCapabilities lists all capable features supported by filesystems
// without Capability interface. This list should not be changed until a
// major version is released.
DefaultCapabilities Capability = WriteCapability | ReadCapability |
ReadAndWriteCapability | SeekCapability | TruncateCapability |
LockCapability
// AllCapabilities lists all capable features.
AllCapabilities Capability = WriteCapability | ReadCapability |
ReadAndWriteCapability | SeekCapability | TruncateCapability |
LockCapability
)
// Filesystem abstract the operations in a storage-agnostic interface.
// Each method implementation mimics the behavior of the equivalent functions
// at the os package from the standard library.
type Filesystem interface {
Basic
TempFile
Dir
Symlink
Chroot
}
// Basic abstract the basic operations in a storage-agnostic interface as
// an extension to the Basic interface.
type Basic interface {
// Create creates the named file with mode 0666 (before umask), truncating
// it if it already exists. If successful, methods on the returned File can
// be used for I/O; the associated file descriptor has mode O_RDWR.
Create(filename string) (File, error)
// Open opens the named file for reading. If successful, methods on the
// returned file can be used for reading; the associated file descriptor has
// mode O_RDONLY.
Open(filename string) (File, error)
// OpenFile is the generalized open call; most users will use Open or Create
// instead. It opens the named file with specified flag (O_RDONLY etc.) and
// perm, (0666 etc.) if applicable. If successful, methods on the returned
// File can be used for I/O.
OpenFile(filename string, flag int, perm os.FileMode) (File, error)
// Stat returns a FileInfo describing the named file.
Stat(filename string) (os.FileInfo, error)
// Rename renames (moves) oldpath to newpath. If newpath already exists and
// is not a directory, Rename replaces it. OS-specific restrictions may
// apply when oldpath and newpath are in different directories.
Rename(oldpath, newpath string) error
// Remove removes the named file or directory.
Remove(filename string) error
// Join joins any number of path elements into a single path, adding a
// Separator if necessary. Join calls filepath.Clean on the result; in
// particular, all empty strings are ignored. On Windows, the result is a
// UNC path if and only if the first path element is a UNC path.
Join(elem ...string) string
}
type TempFile interface {
// TempFile creates a new temporary file in the directory dir with a name
// beginning with prefix, opens the file for reading and writing, and
// returns the resulting *os.File. If dir is the empty string, TempFile
// uses the default directory for temporary files (see os.TempDir).
// Multiple programs calling TempFile simultaneously will not choose the
// same file. The caller can use f.Name() to find the pathname of the file.
// It is the caller's responsibility to remove the file when no longer
// needed.
TempFile(dir, prefix string) (File, error)
}
// Dir abstract the dir related operations in a storage-agnostic interface as
// an extension to the Basic interface.
type Dir interface {
// ReadDir reads the directory named by dirname and returns a list of
// directory entries sorted by filename.
ReadDir(path string) ([]os.FileInfo, error)
// MkdirAll creates a directory named path, along with any necessary
// parents, and returns nil, or else returns an error. The permission bits
// perm are used for all directories that MkdirAll creates. If path is/
// already a directory, MkdirAll does nothing and returns nil.
MkdirAll(filename string, perm os.FileMode) error
}
// Symlink abstract the symlink related operations in a storage-agnostic
// interface as an extension to the Basic interface.
type Symlink interface {
// Lstat returns a FileInfo describing the named file. If the file is a
// symbolic link, the returned FileInfo describes the symbolic link. Lstat
// makes no attempt to follow the link.
Lstat(filename string) (os.FileInfo, error)
// Symlink creates a symbolic-link from link to target. target may be an
// absolute or relative path, and need not refer to an existing node.
// Parent directories of link are created as necessary.
Symlink(target, link string) error
// Readlink returns the target path of link.
Readlink(link string) (string, error)
}
// Change abstract the FileInfo change related operations in a storage-agnostic
// interface as an extension to the Basic interface
type Change interface {
// Chmod changes the mode of the named file to mode. If the file is a
// symbolic link, it changes the mode of the link's target.
Chmod(name string, mode os.FileMode) error
// Lchown changes the numeric uid and gid of the named file. If the file is
// a symbolic link, it changes the uid and gid of the link itself.
Lchown(name string, uid, gid int) error
// Chown changes the numeric uid and gid of the named file. If the file is a
// symbolic link, it changes the uid and gid of the link's target.
Chown(name string, uid, gid int) error
// Chtimes changes the access and modification times of the named file,
// similar to the Unix utime() or utimes() functions.
//
// The underlying filesystem may truncate or round the values to a less
// precise time unit.
Chtimes(name string, atime time.Time, mtime time.Time) error
}
// Chroot abstract the chroot related operations in a storage-agnostic interface
// as an extension to the Basic interface.
type Chroot interface {
// Chroot returns a new filesystem from the same type where the new root is
// the given path. Files outside of the designated directory tree cannot be
// accessed.
Chroot(path string) (Filesystem, error)
// Root returns the root path of the filesystem.
Root() string
}
// File represent a file, being a subset of the os.File
type File interface {
// Name returns the name of the file as presented to Open.
Name() string
io.Writer
io.Reader
io.ReaderAt
io.Seeker
io.Closer
// Lock locks the file like e.g. flock. It protects against access from
// other processes.
Lock() error
// Unlock unlocks the file.
Unlock() error
// Truncate the file.
Truncate(size int64) error
}
// Capable interface can return the available features of a filesystem.
type Capable interface {
// Capabilities returns the capabilities of a filesystem in bit flags.
Capabilities() Capability
}
// Capabilities returns the features supported by a filesystem. If the FS
// does not implement Capable interface it returns all features.
func Capabilities(fs Basic) Capability {
capable, ok := fs.(Capable)
if !ok {
return DefaultCapabilities
}
return capable.Capabilities()
}
// CapabilityCheck tests the filesystem for the provided capabilities and
// returns true in case it supports all of them.
func CapabilityCheck(fs Basic, capabilities Capability) bool {
fsCaps := Capabilities(fs)
return fsCaps&capabilities == capabilities
}

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module github.com/go-git/go-billy/v5
require (
github.com/kr/text v0.2.0 // indirect
github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f
)
go 1.13

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github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/go-git/go-billy v1.0.0 h1:bXR6Zu3opPSg0R4dDxqaLglY4rxw7ja7wS16qSpOKL4=
github.com/go-git/go-billy v3.1.0+incompatible h1:dwrJ8G2Jt1srYgIJs+lRjA36qBY68O2Lg5idKG8ef5M=
github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 h1:uYVVQ9WP/Ds2ROhcaGPeIdVq0RIXVLwsHlnvJ+cT1So=
golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

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package chroot
import (
"os"
"path/filepath"
"strings"
"github.com/go-git/go-billy/v5"
"github.com/go-git/go-billy/v5/helper/polyfill"
)
// ChrootHelper is a helper to implement billy.Chroot.
type ChrootHelper struct {
underlying billy.Filesystem
base string
}
// New creates a new filesystem wrapping up the given 'fs'.
// The created filesystem has its base in the given ChrootHelperectory of the
// underlying filesystem.
func New(fs billy.Basic, base string) billy.Filesystem {
return &ChrootHelper{
underlying: polyfill.New(fs),
base: base,
}
}
func (fs *ChrootHelper) underlyingPath(filename string) (string, error) {
if isCrossBoundaries(filename) {
return "", billy.ErrCrossedBoundary
}
return fs.Join(fs.Root(), filename), nil
}
func isCrossBoundaries(path string) bool {
path = filepath.ToSlash(path)
path = filepath.Clean(path)
return strings.HasPrefix(path, ".."+string(filepath.Separator))
}
func (fs *ChrootHelper) Create(filename string) (billy.File, error) {
fullpath, err := fs.underlyingPath(filename)
if err != nil {
return nil, err
}
f, err := fs.underlying.Create(fullpath)
if err != nil {
return nil, err
}
return newFile(fs, f, filename), nil
}
func (fs *ChrootHelper) Open(filename string) (billy.File, error) {
fullpath, err := fs.underlyingPath(filename)
if err != nil {
return nil, err
}
f, err := fs.underlying.Open(fullpath)
if err != nil {
return nil, err
}
return newFile(fs, f, filename), nil
}
func (fs *ChrootHelper) OpenFile(filename string, flag int, mode os.FileMode) (billy.File, error) {
fullpath, err := fs.underlyingPath(filename)
if err != nil {
return nil, err
}
f, err := fs.underlying.OpenFile(fullpath, flag, mode)
if err != nil {
return nil, err
}
return newFile(fs, f, filename), nil
}
func (fs *ChrootHelper) Stat(filename string) (os.FileInfo, error) {
fullpath, err := fs.underlyingPath(filename)
if err != nil {
return nil, err
}
return fs.underlying.Stat(fullpath)
}
func (fs *ChrootHelper) Rename(from, to string) error {
var err error
from, err = fs.underlyingPath(from)
if err != nil {
return err
}
to, err = fs.underlyingPath(to)
if err != nil {
return err
}
return fs.underlying.Rename(from, to)
}
func (fs *ChrootHelper) Remove(path string) error {
fullpath, err := fs.underlyingPath(path)
if err != nil {
return err
}
return fs.underlying.Remove(fullpath)
}
func (fs *ChrootHelper) Join(elem ...string) string {
return fs.underlying.Join(elem...)
}
func (fs *ChrootHelper) TempFile(dir, prefix string) (billy.File, error) {
fullpath, err := fs.underlyingPath(dir)
if err != nil {
return nil, err
}
f, err := fs.underlying.(billy.TempFile).TempFile(fullpath, prefix)
if err != nil {
return nil, err
}
return newFile(fs, f, fs.Join(dir, filepath.Base(f.Name()))), nil
}
func (fs *ChrootHelper) ReadDir(path string) ([]os.FileInfo, error) {
fullpath, err := fs.underlyingPath(path)
if err != nil {
return nil, err
}
return fs.underlying.(billy.Dir).ReadDir(fullpath)
}
func (fs *ChrootHelper) MkdirAll(filename string, perm os.FileMode) error {
fullpath, err := fs.underlyingPath(filename)
if err != nil {
return err
}
return fs.underlying.(billy.Dir).MkdirAll(fullpath, perm)
}
func (fs *ChrootHelper) Lstat(filename string) (os.FileInfo, error) {
fullpath, err := fs.underlyingPath(filename)
if err != nil {
return nil, err
}
return fs.underlying.(billy.Symlink).Lstat(fullpath)
}
func (fs *ChrootHelper) Symlink(target, link string) error {
target = filepath.FromSlash(target)
// only rewrite target if it's already absolute
if filepath.IsAbs(target) || strings.HasPrefix(target, string(filepath.Separator)) {
target = fs.Join(fs.Root(), target)
target = filepath.Clean(filepath.FromSlash(target))
}
link, err := fs.underlyingPath(link)
if err != nil {
return err
}
return fs.underlying.(billy.Symlink).Symlink(target, link)
}
func (fs *ChrootHelper) Readlink(link string) (string, error) {
fullpath, err := fs.underlyingPath(link)
if err != nil {
return "", err
}
target, err := fs.underlying.(billy.Symlink).Readlink(fullpath)
if err != nil {
return "", err
}
if !filepath.IsAbs(target) && !strings.HasPrefix(target, string(filepath.Separator)) {
return target, nil
}
target, err = filepath.Rel(fs.base, target)
if err != nil {
return "", err
}
return string(os.PathSeparator) + target, nil
}
func (fs *ChrootHelper) Chroot(path string) (billy.Filesystem, error) {
fullpath, err := fs.underlyingPath(path)
if err != nil {
return nil, err
}
return New(fs.underlying, fullpath), nil
}
func (fs *ChrootHelper) Root() string {
return fs.base
}
func (fs *ChrootHelper) Underlying() billy.Basic {
return fs.underlying
}
// Capabilities implements the Capable interface.
func (fs *ChrootHelper) Capabilities() billy.Capability {
return billy.Capabilities(fs.underlying)
}
type file struct {
billy.File
name string
}
func newFile(fs billy.Filesystem, f billy.File, filename string) billy.File {
filename = fs.Join(fs.Root(), filename)
filename, _ = filepath.Rel(fs.Root(), filename)
return &file{
File: f,
name: filename,
}
}
func (f *file) Name() string {
return f.name
}

105
vendor/github.com/go-git/go-billy/v5/helper/polyfill/polyfill.go generated vendored Normal file
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package polyfill
import (
"os"
"path/filepath"
"github.com/go-git/go-billy/v5"
)
// Polyfill is a helper that implements all missing method from billy.Filesystem.
type Polyfill struct {
billy.Basic
c capabilities
}
type capabilities struct{ tempfile, dir, symlink, chroot bool }
// New creates a new filesystem wrapping up 'fs' the intercepts all the calls
// made and errors if fs doesn't implement any of the billy interfaces.
func New(fs billy.Basic) billy.Filesystem {
if original, ok := fs.(billy.Filesystem); ok {
return original
}
h := &Polyfill{Basic: fs}
_, h.c.tempfile = h.Basic.(billy.TempFile)
_, h.c.dir = h.Basic.(billy.Dir)
_, h.c.symlink = h.Basic.(billy.Symlink)
_, h.c.chroot = h.Basic.(billy.Chroot)
return h
}
func (h *Polyfill) TempFile(dir, prefix string) (billy.File, error) {
if !h.c.tempfile {
return nil, billy.ErrNotSupported
}
return h.Basic.(billy.TempFile).TempFile(dir, prefix)
}
func (h *Polyfill) ReadDir(path string) ([]os.FileInfo, error) {
if !h.c.dir {
return nil, billy.ErrNotSupported
}
return h.Basic.(billy.Dir).ReadDir(path)
}
func (h *Polyfill) MkdirAll(filename string, perm os.FileMode) error {
if !h.c.dir {
return billy.ErrNotSupported
}
return h.Basic.(billy.Dir).MkdirAll(filename, perm)
}
func (h *Polyfill) Symlink(target, link string) error {
if !h.c.symlink {
return billy.ErrNotSupported
}
return h.Basic.(billy.Symlink).Symlink(target, link)
}
func (h *Polyfill) Readlink(link string) (string, error) {
if !h.c.symlink {
return "", billy.ErrNotSupported
}
return h.Basic.(billy.Symlink).Readlink(link)
}
func (h *Polyfill) Lstat(path string) (os.FileInfo, error) {
if !h.c.symlink {
return nil, billy.ErrNotSupported
}
return h.Basic.(billy.Symlink).Lstat(path)
}
func (h *Polyfill) Chroot(path string) (billy.Filesystem, error) {
if !h.c.chroot {
return nil, billy.ErrNotSupported
}
return h.Basic.(billy.Chroot).Chroot(path)
}
func (h *Polyfill) Root() string {
if !h.c.chroot {
return string(filepath.Separator)
}
return h.Basic.(billy.Chroot).Root()
}
func (h *Polyfill) Underlying() billy.Basic {
return h.Basic
}
// Capabilities implements the Capable interface.
func (h *Polyfill) Capabilities() billy.Capability {
return billy.Capabilities(h.Basic)
}

139
vendor/github.com/go-git/go-billy/v5/osfs/os.go generated vendored Normal file
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// Package osfs provides a billy filesystem for the OS.
package osfs // import "github.com/go-git/go-billy/v5/osfs"
import (
"io/ioutil"
"os"
"path/filepath"
"sync"
"github.com/go-git/go-billy/v5"
"github.com/go-git/go-billy/v5/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 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
}

83
vendor/github.com/go-git/go-billy/v5/osfs/os_plan9.go generated vendored Normal file
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package osfs
import (
"io"
"os"
"path/filepath"
"syscall"
)
func (f *file) Lock() error {
// Plan 9 uses a mode bit instead of explicit lock/unlock syscalls.
//
// Per http://man.cat-v.org/plan_9/5/stat: “Exclusive use files may be open
// for I/O by only one fid at a time across all clients of the server. If a
// second open is attempted, it draws an error.”
//
// There is no obvious way to implement this function using the exclusive use bit.
// See https://golang.org/src/cmd/go/internal/lockedfile/lockedfile_plan9.go
// for how file locking is done by the go tool on Plan 9.
return nil
}
func (f *file) Unlock() error {
return nil
}
func rename(from, to string) error {
// If from and to are in different directories, copy the file
// since Plan 9 does not support cross-directory rename.
if filepath.Dir(from) != filepath.Dir(to) {
fi, err := os.Stat(from)
if err != nil {
return &os.LinkError{"rename", from, to, err}
}
if fi.Mode().IsDir() {
return &os.LinkError{"rename", from, to, syscall.EISDIR}
}
fromFile, err := os.Open(from)
if err != nil {
return &os.LinkError{"rename", from, to, err}
}
toFile, err := os.OpenFile(to, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, fi.Mode())
if err != nil {
return &os.LinkError{"rename", from, to, err}
}
_, err = io.Copy(toFile, fromFile)
if err != nil {
return &os.LinkError{"rename", from, to, err}
}
// Copy mtime and mode from original file.
// We need only one syscall if we avoid os.Chmod and os.Chtimes.
dir := fi.Sys().(*syscall.Dir)
var d syscall.Dir
d.Null()
d.Mtime = dir.Mtime
d.Mode = dir.Mode
if err = dirwstat(to, &d); err != nil {
return &os.LinkError{"rename", from, to, err}
}
// Remove original file.
err = os.Remove(from)
if err != nil {
return &os.LinkError{"rename", from, to, err}
}
return nil
}
return os.Rename(from, to)
}
func dirwstat(name string, d *syscall.Dir) error {
var buf [syscall.STATFIXLEN]byte
n, err := d.Marshal(buf[:])
if err != nil {
return &os.PathError{"dirwstat", name, err}
}
if err = syscall.Wstat(name, buf[:n]); err != nil {
return &os.PathError{"dirwstat", name, err}
}
return nil
}

27
vendor/github.com/go-git/go-billy/v5/osfs/os_posix.go generated vendored Normal file
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// +build !plan9,!windows
package osfs
import (
"os"
"golang.org/x/sys/unix"
)
func (f *file) Lock() error {
f.m.Lock()
defer f.m.Unlock()
return unix.Flock(int(f.File.Fd()), unix.LOCK_EX)
}
func (f *file) Unlock() error {
f.m.Lock()
defer f.m.Unlock()
return unix.Flock(int(f.File.Fd()), unix.LOCK_UN)
}
func rename(from, to string) error {
return os.Rename(from, to)
}

61
vendor/github.com/go-git/go-billy/v5/osfs/os_windows.go generated vendored Normal file
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// +build windows
package osfs
import (
"os"
"runtime"
"unsafe"
"golang.org/x/sys/windows"
)
type fileInfo struct {
os.FileInfo
name string
}
func (fi *fileInfo) Name() string {
return fi.name
}
var (
kernel32DLL = windows.NewLazySystemDLL("kernel32.dll")
lockFileExProc = kernel32DLL.NewProc("LockFileEx")
unlockFileProc = kernel32DLL.NewProc("UnlockFile")
)
const (
lockfileExclusiveLock = 0x2
)
func (f *file) Lock() error {
f.m.Lock()
defer f.m.Unlock()
var overlapped windows.Overlapped
// err is always non-nil as per sys/windows semantics.
ret, _, err := lockFileExProc.Call(f.File.Fd(), lockfileExclusiveLock, 0, 0xFFFFFFFF, 0,
uintptr(unsafe.Pointer(&overlapped)))
runtime.KeepAlive(&overlapped)
if ret == 0 {
return err
}
return nil
}
func (f *file) Unlock() error {
f.m.Lock()
defer f.m.Unlock()
// err is always non-nil as per sys/windows semantics.
ret, _, err := unlockFileProc.Call(f.File.Fd(), 0, 0, 0xFFFFFFFF, 0)
if ret == 0 {
return err
}
return nil
}
func rename(from, to string) error {
return os.Rename(from, to)
}

111
vendor/github.com/go-git/go-billy/v5/util/glob.go generated vendored Normal file
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package util
import (
"path/filepath"
"sort"
"strings"
"github.com/go-git/go-billy/v5"
)
// Glob returns the names of all files matching pattern or nil
// if there is no matching file. The syntax of patterns is the same
// as in Match. The pattern may describe hierarchical names such as
// /usr/*/bin/ed (assuming the Separator is '/').
//
// Glob ignores file system errors such as I/O errors reading directories.
// The only possible returned error is ErrBadPattern, when pattern
// is malformed.
//
// Function originally from https://golang.org/src/path/filepath/match_test.go
func Glob(fs billy.Filesystem, pattern string) (matches []string, err error) {
if !hasMeta(pattern) {
if _, err = fs.Lstat(pattern); err != nil {
return nil, nil
}
return []string{pattern}, nil
}
dir, file := filepath.Split(pattern)
// Prevent infinite recursion. See issue 15879.
if dir == pattern {
return nil, filepath.ErrBadPattern
}
var m []string
m, err = Glob(fs, cleanGlobPath(dir))
if err != nil {
return
}
for _, d := range m {
matches, err = glob(fs, d, file, matches)
if err != nil {
return
}
}
return
}
// cleanGlobPath prepares path for glob matching.
func cleanGlobPath(path string) string {
switch path {
case "":
return "."
case string(filepath.Separator):
// do nothing to the path
return path
default:
return path[0 : len(path)-1] // chop off trailing separator
}
}
// glob searches for files matching pattern in the directory dir
// and appends them to matches. If the directory cannot be
// opened, it returns the existing matches. New matches are
// added in lexicographical order.
func glob(fs billy.Filesystem, dir, pattern string, matches []string) (m []string, e error) {
m = matches
fi, err := fs.Stat(dir)
if err != nil {
return
}
if !fi.IsDir() {
return
}
names, _ := readdirnames(fs, dir)
sort.Strings(names)
for _, n := range names {
matched, err := filepath.Match(pattern, n)
if err != nil {
return m, err
}
if matched {
m = append(m, filepath.Join(dir, n))
}
}
return
}
// hasMeta reports whether path contains any of the magic characters
// recognized by Match.
func hasMeta(path string) bool {
// TODO(niemeyer): Should other magic characters be added here?
return strings.ContainsAny(path, "*?[")
}
func readdirnames(fs billy.Filesystem, dir string) ([]string, error) {
files, err := fs.ReadDir(dir)
if err != nil {
return nil, err
}
var names []string
for _, file := range files {
names = append(names, file.Name())
}
return names, nil
}

224
vendor/github.com/go-git/go-billy/v5/util/util.go generated vendored Normal file
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package util
import (
"io"
"os"
"path/filepath"
"strconv"
"sync"
"time"
"github.com/go-git/go-billy/v5"
)
// RemoveAll removes path and any children it contains. It removes everything it
// can but returns the first error it encounters. If the path does not exist,
// RemoveAll returns nil (no error).
func RemoveAll(fs billy.Basic, path string) error {
fs, path = getUnderlyingAndPath(fs, path)
if r, ok := fs.(removerAll); ok {
return r.RemoveAll(path)
}
return removeAll(fs, path)
}
type removerAll interface {
RemoveAll(string) error
}
func removeAll(fs billy.Basic, path string) error {
// This implementation is adapted from os.RemoveAll.
// Simple case: if Remove works, we're done.
err := fs.Remove(path)
if err == nil || os.IsNotExist(err) {
return nil
}
// Otherwise, is this a directory we need to recurse into?
dir, serr := fs.Stat(path)
if serr != nil {
if os.IsNotExist(serr) {
return nil
}
return serr
}
if !dir.IsDir() {
// Not a directory; return the error from Remove.
return err
}
dirfs, ok := fs.(billy.Dir)
if !ok {
return billy.ErrNotSupported
}
// Directory.
fis, err := dirfs.ReadDir(path)
if err != nil {
if os.IsNotExist(err) {
// Race. It was deleted between the Lstat and Open.
// Return nil per RemoveAll's docs.
return nil
}
return err
}
// Remove contents & return first error.
err = nil
for _, fi := range fis {
cpath := fs.Join(path, fi.Name())
err1 := removeAll(fs, cpath)
if err == nil {
err = err1
}
}
// Remove directory.
err1 := fs.Remove(path)
if err1 == nil || os.IsNotExist(err1) {
return nil
}
if err == nil {
err = err1
}
return err
}
// WriteFile writes data to a file named by filename in the given filesystem.
// If the file does not exist, WriteFile creates it with permissions perm;
// otherwise WriteFile truncates it before writing.
func WriteFile(fs billy.Basic, filename string, data []byte, perm os.FileMode) error {
f, err := fs.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
}
// Random number state.
// We generate random temporary file names so that there's a good
// chance the file doesn't exist yet - keeps the number of tries in
// TempFile to a minimum.
var rand uint32
var randmu sync.Mutex
func reseed() uint32 {
return uint32(time.Now().UnixNano() + int64(os.Getpid()))
}
func nextSuffix() string {
randmu.Lock()
r := rand
if r == 0 {
r = reseed()
}
r = r*1664525 + 1013904223 // constants from Numerical Recipes
rand = r
randmu.Unlock()
return strconv.Itoa(int(1e9 + r%1e9))[1:]
}
// TempFile creates a new temporary file in the directory dir with a name
// beginning with prefix, opens the file for reading and writing, and returns
// the resulting *os.File. If dir is the empty string, TempFile uses the default
// directory for temporary files (see os.TempDir). Multiple programs calling
// TempFile simultaneously will not choose the same file. The caller can use
// f.Name() to find the pathname of the file. It is the caller's responsibility
// to remove the file when no longer needed.
func TempFile(fs billy.Basic, dir, prefix string) (f billy.File, err error) {
// This implementation is based on stdlib ioutil.TempFile.
if dir == "" {
dir = os.TempDir()
}
nconflict := 0
for i := 0; i < 10000; i++ {
name := filepath.Join(dir, prefix+nextSuffix())
f, err = fs.OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
if os.IsExist(err) {
if nconflict++; nconflict > 10 {
randmu.Lock()
rand = reseed()
randmu.Unlock()
}
continue
}
break
}
return
}
// TempDir creates a new temporary directory in the directory dir
// with a name beginning with prefix and returns the path of the
// new directory. If dir is the empty string, TempDir uses the
// default directory for temporary files (see os.TempDir).
// Multiple programs calling TempDir simultaneously
// will not choose the same directory. It is the caller's responsibility
// to remove the directory when no longer needed.
func TempDir(fs billy.Dir, dir, prefix string) (name string, err error) {
// This implementation is based on stdlib ioutil.TempDir
if dir == "" {
dir = os.TempDir()
}
nconflict := 0
for i := 0; i < 10000; i++ {
try := filepath.Join(dir, prefix+nextSuffix())
err = fs.MkdirAll(try, 0700)
if os.IsExist(err) {
if nconflict++; nconflict > 10 {
randmu.Lock()
rand = reseed()
randmu.Unlock()
}
continue
}
if os.IsNotExist(err) {
if _, err := os.Stat(dir); os.IsNotExist(err) {
return "", err
}
}
if err == nil {
name = try
}
break
}
return
}
type underlying interface {
Underlying() billy.Basic
}
func getUnderlyingAndPath(fs billy.Basic, path string) (billy.Basic, string) {
u, ok := fs.(underlying)
if !ok {
return fs, path
}
if ch, ok := fs.(billy.Chroot); ok {
path = fs.Join(ch.Root(), path)
}
return u.Underlying(), path
}