Migrate to go-git/go-git v5.0.0 (#10735)

vendor/github.com/go-git/go-billy/v5/osfs/os.go

@@ -0,0 +1,139 @@
+// 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
+}

vendor/github.com/go-git/go-billy/v5/osfs/os_plan9.go

@@ -0,0 +1,83 @@
+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
+}

vendor/github.com/go-git/go-billy/v5/osfs/os_posix.go

@@ -0,0 +1,27 @@
+// +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)
+}

vendor/github.com/go-git/go-billy/v5/osfs/os_windows.go

@@ -0,0 +1,61 @@
+// +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)
+}