3 files changed, 217 insertions, 0 deletions
diff --git a/vendor/gopkg.in/src-d/go-billy.v4/osfs/os.go b/vendor/gopkg.in/src-d/go-billy.v4/osfs/os.go
new file mode 100644
index 0000000000..ff35a3ba96
--- /dev/null
+++ b/vendor/gopkg.in/src-d/go-billy.v4/osfs/os.go
@@ -0,0 +1,139 @@
+// 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
+}
diff --git a/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_posix.go b/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_posix.go
new file mode 100644
index 0000000000..0eda3bd300
--- /dev/null
+++ b/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_posix.go
@@ -0,0 +1,21 @@
+// +build !windows
+
+package osfs
+
+import (
+	"syscall"
+)
+
+func (f *file) Lock() error {
+	f.m.Lock()
+	defer f.m.Unlock()
+
+	return syscall.Flock(int(f.File.Fd()), syscall.LOCK_EX)
+}
+
+func (f *file) Unlock() error {
+	f.m.Lock()
+	defer f.m.Unlock()
+
+	return syscall.Flock(int(f.File.Fd()), syscall.LOCK_UN)
+}
diff --git a/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_windows.go b/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_windows.go
new file mode 100644
index 0000000000..5eb98829d0
--- /dev/null
+++ b/vendor/gopkg.in/src-d/go-billy.v4/osfs/os_windows.go
@@ -0,0 +1,57 @@
+// +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
+}