diff --git a/vendor/github.com/kr/pty/License b/vendor/github.com/kr/pty/License
new file mode 100644
index 0000000..6b7558b
--- /dev/null
+++ b/vendor/github.com/kr/pty/License
@@ -0,0 +1,23 @@
+Copyright (c) 2011 Keith Rarick
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall
+be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/vendor/github.com/kr/pty/README.md b/vendor/github.com/kr/pty/README.md
new file mode 100644
index 0000000..7b7900c
--- /dev/null
+++ b/vendor/github.com/kr/pty/README.md
@@ -0,0 +1,36 @@
+# pty
+
+Pty is a Go package for using unix pseudo-terminals.
+
+## Install
+
+    go get github.com/kr/pty
+
+## Example
+
+```go
+package main
+
+import (
+	"github.com/kr/pty"
+	"io"
+	"os"
+	"os/exec"
+)
+
+func main() {
+	c := exec.Command("grep", "--color=auto", "bar")
+	f, err := pty.Start(c)
+	if err != nil {
+		panic(err)
+	}
+
+	go func() {
+		f.Write([]byte("foo\n"))
+		f.Write([]byte("bar\n"))
+		f.Write([]byte("baz\n"))
+		f.Write([]byte{4}) // EOT
+	}()
+	io.Copy(os.Stdout, f)
+}
+```
diff --git a/vendor/github.com/kr/pty/doc.go b/vendor/github.com/kr/pty/doc.go
new file mode 100644
index 0000000..190cfbe
--- /dev/null
+++ b/vendor/github.com/kr/pty/doc.go
@@ -0,0 +1,16 @@
+// Package pty provides functions for working with Unix terminals.
+package pty
+
+import (
+	"errors"
+	"os"
+)
+
+// ErrUnsupported is returned if a function is not
+// available on the current platform.
+var ErrUnsupported = errors.New("unsupported")
+
+// Opens a pty and its corresponding tty.
+func Open() (pty, tty *os.File, err error) {
+	return open()
+}
diff --git a/vendor/github.com/kr/pty/ioctl.go b/vendor/github.com/kr/pty/ioctl.go
new file mode 100644
index 0000000..c57c19e
--- /dev/null
+++ b/vendor/github.com/kr/pty/ioctl.go
@@ -0,0 +1,13 @@
+// +build !windows
+
+package pty
+
+import "syscall"
+
+func ioctl(fd, cmd, ptr uintptr) error {
+	_, _, e := syscall.Syscall(syscall.SYS_IOCTL, fd, cmd, ptr)
+	if e != 0 {
+		return e
+	}
+	return nil
+}
diff --git a/vendor/github.com/kr/pty/ioctl_bsd.go b/vendor/github.com/kr/pty/ioctl_bsd.go
new file mode 100644
index 0000000..73b12c5
--- /dev/null
+++ b/vendor/github.com/kr/pty/ioctl_bsd.go
@@ -0,0 +1,39 @@
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package pty
+
+// from <sys/ioccom.h>
+const (
+	_IOC_VOID    uintptr = 0x20000000
+	_IOC_OUT     uintptr = 0x40000000
+	_IOC_IN      uintptr = 0x80000000
+	_IOC_IN_OUT  uintptr = _IOC_OUT | _IOC_IN
+	_IOC_DIRMASK         = _IOC_VOID | _IOC_OUT | _IOC_IN
+
+	_IOC_PARAM_SHIFT = 13
+	_IOC_PARAM_MASK  = (1 << _IOC_PARAM_SHIFT) - 1
+)
+
+func _IOC_PARM_LEN(ioctl uintptr) uintptr {
+	return (ioctl >> 16) & _IOC_PARAM_MASK
+}
+
+func _IOC(inout uintptr, group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return inout | (param_len&_IOC_PARAM_MASK)<<16 | uintptr(group)<<8 | ioctl_num
+}
+
+func _IO(group byte, ioctl_num uintptr) uintptr {
+	return _IOC(_IOC_VOID, group, ioctl_num, 0)
+}
+
+func _IOR(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_OUT, group, ioctl_num, param_len)
+}
+
+func _IOW(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_IN, group, ioctl_num, param_len)
+}
+
+func _IOWR(group byte, ioctl_num uintptr, param_len uintptr) uintptr {
+	return _IOC(_IOC_IN_OUT, group, ioctl_num, param_len)
+}
diff --git a/vendor/github.com/kr/pty/mktypes.bash b/vendor/github.com/kr/pty/mktypes.bash
new file mode 100644
index 0000000..0c07680
--- /dev/null
+++ b/vendor/github.com/kr/pty/mktypes.bash
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+GOOSARCH="${GOOS}_${GOARCH}"
+case "$GOOSARCH" in
+_* | *_ | _)
+	echo 'undefined $GOOS_$GOARCH:' "$GOOSARCH" 1>&2
+	exit 1
+	;;
+esac
+
+GODEFS="go tool cgo -godefs"
+
+$GODEFS types.go |gofmt > ztypes_$GOARCH.go
+
+case $GOOS in
+freebsd|dragonfly)
+	$GODEFS types_$GOOS.go |gofmt > ztypes_$GOOSARCH.go
+	;;
+esac
diff --git a/vendor/github.com/kr/pty/pty_darwin.go b/vendor/github.com/kr/pty/pty_darwin.go
new file mode 100644
index 0000000..4f4d5ca
--- /dev/null
+++ b/vendor/github.com/kr/pty/pty_darwin.go
@@ -0,0 +1,60 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func open() (pty, tty *os.File, err error) {
+	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = grantpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = unlockpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func ptsname(f *os.File) (string, error) {
+	n := make([]byte, _IOC_PARM_LEN(syscall.TIOCPTYGNAME))
+
+	err := ioctl(f.Fd(), syscall.TIOCPTYGNAME, uintptr(unsafe.Pointer(&n[0])))
+	if err != nil {
+		return "", err
+	}
+
+	for i, c := range n {
+		if c == 0 {
+			return string(n[:i]), nil
+		}
+	}
+	return "", errors.New("TIOCPTYGNAME string not NUL-terminated")
+}
+
+func grantpt(f *os.File) error {
+	return ioctl(f.Fd(), syscall.TIOCPTYGRANT, 0)
+}
+
+func unlockpt(f *os.File) error {
+	return ioctl(f.Fd(), syscall.TIOCPTYUNLK, 0)
+}
diff --git a/vendor/github.com/kr/pty/pty_dragonfly.go b/vendor/github.com/kr/pty/pty_dragonfly.go
new file mode 100644
index 0000000..5431fb5
--- /dev/null
+++ b/vendor/github.com/kr/pty/pty_dragonfly.go
@@ -0,0 +1,76 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+// same code as pty_darwin.go
+func open() (pty, tty *os.File, err error) {
+	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = grantpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = unlockpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func grantpt(f *os.File) error {
+	_, err := isptmaster(f.Fd())
+	return err
+}
+
+func unlockpt(f *os.File) error {
+	_, err := isptmaster(f.Fd())
+	return err
+}
+
+func isptmaster(fd uintptr) (bool, error) {
+	err := ioctl(fd, syscall.TIOCISPTMASTER, 0)
+	return err == nil, err
+}
+
+var (
+	emptyFiodgnameArg fiodgnameArg
+	ioctl_FIODNAME    = _IOW('f', 120, unsafe.Sizeof(emptyFiodgnameArg))
+)
+
+func ptsname(f *os.File) (string, error) {
+	name := make([]byte, _C_SPECNAMELEN)
+	fa := fiodgnameArg{Name: (*byte)(unsafe.Pointer(&name[0])), Len: _C_SPECNAMELEN, Pad_cgo_0: [4]byte{0, 0, 0, 0}}
+
+	err := ioctl(f.Fd(), ioctl_FIODNAME, uintptr(unsafe.Pointer(&fa)))
+	if err != nil {
+		return "", err
+	}
+
+	for i, c := range name {
+		if c == 0 {
+			s := "/dev/" + string(name[:i])
+			return strings.Replace(s, "ptm", "pts", -1), nil
+		}
+	}
+	return "", errors.New("TIOCPTYGNAME string not NUL-terminated")
+}
diff --git a/vendor/github.com/kr/pty/pty_freebsd.go b/vendor/github.com/kr/pty/pty_freebsd.go
new file mode 100644
index 0000000..b341bab
--- /dev/null
+++ b/vendor/github.com/kr/pty/pty_freebsd.go
@@ -0,0 +1,73 @@
+package pty
+
+import (
+	"errors"
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+func posix_openpt(oflag int) (fd int, err error) {
+	r0, _, e1 := syscall.Syscall(syscall.SYS_POSIX_OPENPT, uintptr(oflag), 0, 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+func open() (pty, tty *os.File, err error) {
+	fd, err := posix_openpt(syscall.O_RDWR | syscall.O_CLOEXEC)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	p := os.NewFile(uintptr(fd), "/dev/pts")
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile("/dev/"+sname, os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func isptmaster(fd uintptr) (bool, error) {
+	err := ioctl(fd, syscall.TIOCPTMASTER, 0)
+	return err == nil, err
+}
+
+var (
+	emptyFiodgnameArg fiodgnameArg
+	ioctl_FIODGNAME   = _IOW('f', 120, unsafe.Sizeof(emptyFiodgnameArg))
+)
+
+func ptsname(f *os.File) (string, error) {
+	master, err := isptmaster(f.Fd())
+	if err != nil {
+		return "", err
+	}
+	if !master {
+		return "", syscall.EINVAL
+	}
+
+	const n = _C_SPECNAMELEN + 1
+	var (
+		buf = make([]byte, n)
+		arg = fiodgnameArg{Len: n, Buf: (*byte)(unsafe.Pointer(&buf[0]))}
+	)
+	err = ioctl(f.Fd(), ioctl_FIODGNAME, uintptr(unsafe.Pointer(&arg)))
+	if err != nil {
+		return "", err
+	}
+
+	for i, c := range buf {
+		if c == 0 {
+			return string(buf[:i]), nil
+		}
+	}
+	return "", errors.New("FIODGNAME string not NUL-terminated")
+}
diff --git a/vendor/github.com/kr/pty/pty_linux.go b/vendor/github.com/kr/pty/pty_linux.go
new file mode 100644
index 0000000..cb901a2
--- /dev/null
+++ b/vendor/github.com/kr/pty/pty_linux.go
@@ -0,0 +1,46 @@
+package pty
+
+import (
+	"os"
+	"strconv"
+	"syscall"
+	"unsafe"
+)
+
+func open() (pty, tty *os.File, err error) {
+	p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	sname, err := ptsname(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	err = unlockpt(p)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	t, err := os.OpenFile(sname, os.O_RDWR|syscall.O_NOCTTY, 0)
+	if err != nil {
+		return nil, nil, err
+	}
+	return p, t, nil
+}
+
+func ptsname(f *os.File) (string, error) {
+	var n _C_uint
+	err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n)))
+	if err != nil {
+		return "", err
+	}
+	return "/dev/pts/" + strconv.Itoa(int(n)), nil
+}
+
+func unlockpt(f *os.File) error {
+	var u _C_int
+	// use TIOCSPTLCK with a zero valued arg to clear the slave pty lock
+	return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
+}
diff --git a/vendor/github.com/kr/pty/pty_unsupported.go b/vendor/github.com/kr/pty/pty_unsupported.go
new file mode 100644
index 0000000..bd3d1e7
--- /dev/null
+++ b/vendor/github.com/kr/pty/pty_unsupported.go
@@ -0,0 +1,11 @@
+// +build !linux,!darwin,!freebsd,!dragonfly
+
+package pty
+
+import (
+	"os"
+)
+
+func open() (pty, tty *os.File, err error) {
+	return nil, nil, ErrUnsupported
+}
diff --git a/vendor/github.com/kr/pty/run.go b/vendor/github.com/kr/pty/run.go
new file mode 100644
index 0000000..baecca8
--- /dev/null
+++ b/vendor/github.com/kr/pty/run.go
@@ -0,0 +1,34 @@
+// +build !windows
+
+package pty
+
+import (
+	"os"
+	"os/exec"
+	"syscall"
+)
+
+// Start assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout,
+// and c.Stderr, calls c.Start, and returns the File of the tty's
+// corresponding pty.
+func Start(c *exec.Cmd) (pty *os.File, err error) {
+	pty, tty, err := Open()
+	if err != nil {
+		return nil, err
+	}
+	defer tty.Close()
+	c.Stdout = tty
+	c.Stdin = tty
+	c.Stderr = tty
+	if c.SysProcAttr == nil {
+		c.SysProcAttr = &syscall.SysProcAttr{}
+	}
+	c.SysProcAttr.Setctty = true
+	c.SysProcAttr.Setsid = true
+	err = c.Start()
+	if err != nil {
+		pty.Close()
+		return nil, err
+	}
+	return pty, err
+}
diff --git a/vendor/github.com/kr/pty/util.go b/vendor/github.com/kr/pty/util.go
new file mode 100644
index 0000000..a4fab9a
--- /dev/null
+++ b/vendor/github.com/kr/pty/util.go
@@ -0,0 +1,37 @@
+// +build !windows
+
+package pty
+
+import (
+	"os"
+	"syscall"
+	"unsafe"
+)
+
+// Getsize returns the number of rows (lines) and cols (positions
+// in each line) in terminal t.
+func Getsize(t *os.File) (rows, cols int, err error) {
+	var ws winsize
+	err = windowrect(&ws, t.Fd())
+	return int(ws.ws_row), int(ws.ws_col), err
+}
+
+type winsize struct {
+	ws_row    uint16
+	ws_col    uint16
+	ws_xpixel uint16
+	ws_ypixel uint16
+}
+
+func windowrect(ws *winsize, fd uintptr) error {
+	_, _, errno := syscall.Syscall(
+		syscall.SYS_IOCTL,
+		fd,
+		syscall.TIOCGWINSZ,
+		uintptr(unsafe.Pointer(ws)),
+	)
+	if errno != 0 {
+		return syscall.Errno(errno)
+	}
+	return nil
+}
diff --git a/vendor/github.com/kr/pty/ztypes_386.go b/vendor/github.com/kr/pty/ztypes_386.go
new file mode 100644
index 0000000..ff0b8fd
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_386.go
@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)
diff --git a/vendor/github.com/kr/pty/ztypes_amd64.go b/vendor/github.com/kr/pty/ztypes_amd64.go
new file mode 100644
index 0000000..ff0b8fd
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_amd64.go
@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)
diff --git a/vendor/github.com/kr/pty/ztypes_arm.go b/vendor/github.com/kr/pty/ztypes_arm.go
new file mode 100644
index 0000000..ff0b8fd
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_arm.go
@@ -0,0 +1,9 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)
diff --git a/vendor/github.com/kr/pty/ztypes_arm64.go b/vendor/github.com/kr/pty/ztypes_arm64.go
new file mode 100644
index 0000000..6c29a4b
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_arm64.go
@@ -0,0 +1,11 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+// +build arm64
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)
diff --git a/vendor/github.com/kr/pty/ztypes_dragonfly_amd64.go b/vendor/github.com/kr/pty/ztypes_dragonfly_amd64.go
new file mode 100644
index 0000000..6b0ba03
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_dragonfly_amd64.go
@@ -0,0 +1,14 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_dragonfly.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Name      *byte
+	Len       uint32
+	Pad_cgo_0 [4]byte
+}
diff --git a/vendor/github.com/kr/pty/ztypes_freebsd_386.go b/vendor/github.com/kr/pty/ztypes_freebsd_386.go
new file mode 100644
index 0000000..d997537
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_freebsd_386.go
@@ -0,0 +1,13 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len int32
+	Buf *byte
+}
diff --git a/vendor/github.com/kr/pty/ztypes_freebsd_amd64.go b/vendor/github.com/kr/pty/ztypes_freebsd_amd64.go
new file mode 100644
index 0000000..5fa102f
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_freebsd_amd64.go
@@ -0,0 +1,14 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len       int32
+	Pad_cgo_0 [4]byte
+	Buf       *byte
+}
diff --git a/vendor/github.com/kr/pty/ztypes_freebsd_arm.go b/vendor/github.com/kr/pty/ztypes_freebsd_arm.go
new file mode 100644
index 0000000..d997537
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_freebsd_arm.go
@@ -0,0 +1,13 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_freebsd.go
+
+package pty
+
+const (
+	_C_SPECNAMELEN = 0x3f
+)
+
+type fiodgnameArg struct {
+	Len int32
+	Buf *byte
+}
diff --git a/vendor/github.com/kr/pty/ztypes_mipsx.go b/vendor/github.com/kr/pty/ztypes_mipsx.go
new file mode 100644
index 0000000..f0ce740
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_mipsx.go
@@ -0,0 +1,12 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+// +build linux
+// +build mips mipsle mips64 mips64le
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)
diff --git a/vendor/github.com/kr/pty/ztypes_ppc64.go b/vendor/github.com/kr/pty/ztypes_ppc64.go
new file mode 100644
index 0000000..4e1af84
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_ppc64.go
@@ -0,0 +1,11 @@
+// +build ppc64
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)
diff --git a/vendor/github.com/kr/pty/ztypes_ppc64le.go b/vendor/github.com/kr/pty/ztypes_ppc64le.go
new file mode 100644
index 0000000..e6780f4
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_ppc64le.go
@@ -0,0 +1,11 @@
+// +build ppc64le
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)
diff --git a/vendor/github.com/kr/pty/ztypes_s390x.go b/vendor/github.com/kr/pty/ztypes_s390x.go
new file mode 100644
index 0000000..a7452b6
--- /dev/null
+++ b/vendor/github.com/kr/pty/ztypes_s390x.go
@@ -0,0 +1,11 @@
+// +build s390x
+
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types.go
+
+package pty
+
+type (
+	_C_int  int32
+	_C_uint uint32
+)
diff --git a/vendor/github.com/pmezard/go-difflib/LICENSE b/vendor/github.com/pmezard/go-difflib/LICENSE
new file mode 100644
index 0000000..c67dad6
--- /dev/null
+++ b/vendor/github.com/pmezard/go-difflib/LICENSE
@@ -0,0 +1,27 @@
+Copyright (c) 2013, Patrick Mezard
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+    Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+    The names of its contributors may not be used to endorse or promote
+products derived from this software without specific prior written
+permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/github.com/pmezard/go-difflib/difflib/difflib.go b/vendor/github.com/pmezard/go-difflib/difflib/difflib.go
new file mode 100644
index 0000000..003e99f
--- /dev/null
+++ b/vendor/github.com/pmezard/go-difflib/difflib/difflib.go
@@ -0,0 +1,772 @@
+// Package difflib is a partial port of Python difflib module.
+//
+// It provides tools to compare sequences of strings and generate textual diffs.
+//
+// The following class and functions have been ported:
+//
+// - SequenceMatcher
+//
+// - unified_diff
+//
+// - context_diff
+//
+// Getting unified diffs was the main goal of the port. Keep in mind this code
+// is mostly suitable to output text differences in a human friendly way, there
+// are no guarantees generated diffs are consumable by patch(1).
+package difflib
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+)
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
+
+func max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+func calculateRatio(matches, length int) float64 {
+	if length > 0 {
+		return 2.0 * float64(matches) / float64(length)
+	}
+	return 1.0
+}
+
+type Match struct {
+	A    int
+	B    int
+	Size int
+}
+
+type OpCode struct {
+	Tag byte
+	I1  int
+	I2  int
+	J1  int
+	J2  int
+}
+
+// SequenceMatcher compares sequence of strings. The basic
+// algorithm predates, and is a little fancier than, an algorithm
+// published in the late 1980's by Ratcliff and Obershelp under the
+// hyperbolic name "gestalt pattern matching".  The basic idea is to find
+// the longest contiguous matching subsequence that contains no "junk"
+// elements (R-O doesn't address junk).  The same idea is then applied
+// recursively to the pieces of the sequences to the left and to the right
+// of the matching subsequence.  This does not yield minimal edit
+// sequences, but does tend to yield matches that "look right" to people.
+//
+// SequenceMatcher tries to compute a "human-friendly diff" between two
+// sequences.  Unlike e.g. UNIX(tm) diff, the fundamental notion is the
+// longest *contiguous* & junk-free matching subsequence.  That's what
+// catches peoples' eyes.  The Windows(tm) windiff has another interesting
+// notion, pairing up elements that appear uniquely in each sequence.
+// That, and the method here, appear to yield more intuitive difference
+// reports than does diff.  This method appears to be the least vulnerable
+// to synching up on blocks of "junk lines", though (like blank lines in
+// ordinary text files, or maybe "<P>" lines in HTML files).  That may be
+// because this is the only method of the 3 that has a *concept* of
+// "junk" <wink>.
+//
+// Timing:  Basic R-O is cubic time worst case and quadratic time expected
+// case.  SequenceMatcher is quadratic time for the worst case and has
+// expected-case behavior dependent in a complicated way on how many
+// elements the sequences have in common; best case time is linear.
+type SequenceMatcher struct {
+	a              []string
+	b              []string
+	b2j            map[string][]int
+	IsJunk         func(string) bool
+	autoJunk       bool
+	bJunk          map[string]struct{}
+	matchingBlocks []Match
+	fullBCount     map[string]int
+	bPopular       map[string]struct{}
+	opCodes        []OpCode
+}
+
+func NewMatcher(a, b []string) *SequenceMatcher {
+	m := SequenceMatcher{autoJunk: true}
+	m.SetSeqs(a, b)
+	return &m
+}
+
+func NewMatcherWithJunk(a, b []string, autoJunk bool,
+	isJunk func(string) bool) *SequenceMatcher {
+
+	m := SequenceMatcher{IsJunk: isJunk, autoJunk: autoJunk}
+	m.SetSeqs(a, b)
+	return &m
+}
+
+// Set two sequences to be compared.
+func (m *SequenceMatcher) SetSeqs(a, b []string) {
+	m.SetSeq1(a)
+	m.SetSeq2(b)
+}
+
+// Set the first sequence to be compared. The second sequence to be compared is
+// not changed.
+//
+// SequenceMatcher computes and caches detailed information about the second
+// sequence, so if you want to compare one sequence S against many sequences,
+// use .SetSeq2(s) once and call .SetSeq1(x) repeatedly for each of the other
+// sequences.
+//
+// See also SetSeqs() and SetSeq2().
+func (m *SequenceMatcher) SetSeq1(a []string) {
+	if &a == &m.a {
+		return
+	}
+	m.a = a
+	m.matchingBlocks = nil
+	m.opCodes = nil
+}
+
+// Set the second sequence to be compared. The first sequence to be compared is
+// not changed.
+func (m *SequenceMatcher) SetSeq2(b []string) {
+	if &b == &m.b {
+		return
+	}
+	m.b = b
+	m.matchingBlocks = nil
+	m.opCodes = nil
+	m.fullBCount = nil
+	m.chainB()
+}
+
+func (m *SequenceMatcher) chainB() {
+	// Populate line -> index mapping
+	b2j := map[string][]int{}
+	for i, s := range m.b {
+		indices := b2j[s]
+		indices = append(indices, i)
+		b2j[s] = indices
+	}
+
+	// Purge junk elements
+	m.bJunk = map[string]struct{}{}
+	if m.IsJunk != nil {
+		junk := m.bJunk
+		for s, _ := range b2j {
+			if m.IsJunk(s) {
+				junk[s] = struct{}{}
+			}
+		}
+		for s, _ := range junk {
+			delete(b2j, s)
+		}
+	}
+
+	// Purge remaining popular elements
+	popular := map[string]struct{}{}
+	n := len(m.b)
+	if m.autoJunk && n >= 200 {
+		ntest := n/100 + 1
+		for s, indices := range b2j {
+			if len(indices) > ntest {
+				popular[s] = struct{}{}
+			}
+		}
+		for s, _ := range popular {
+			delete(b2j, s)
+		}
+	}
+	m.bPopular = popular
+	m.b2j = b2j
+}
+
+func (m *SequenceMatcher) isBJunk(s string) bool {
+	_, ok := m.bJunk[s]
+	return ok
+}
+
+// Find longest matching block in a[alo:ahi] and b[blo:bhi].
+//
+// If IsJunk is not defined:
+//
+// Return (i,j,k) such that a[i:i+k] is equal to b[j:j+k], where
+//     alo <= i <= i+k <= ahi
+//     blo <= j <= j+k <= bhi
+// and for all (i',j',k') meeting those conditions,
+//     k >= k'
+//     i <= i'
+//     and if i == i', j <= j'
+//
+// In other words, of all maximal matching blocks, return one that
+// starts earliest in a, and of all those maximal matching blocks that
+// start earliest in a, return the one that starts earliest in b.
+//
+// If IsJunk is defined, first the longest matching block is
+// determined as above, but with the additional restriction that no
+// junk element appears in the block.  Then that block is extended as
+// far as possible by matching (only) junk elements on both sides.  So
+// the resulting block never matches on junk except as identical junk
+// happens to be adjacent to an "interesting" match.
+//
+// If no blocks match, return (alo, blo, 0).
+func (m *SequenceMatcher) findLongestMatch(alo, ahi, blo, bhi int) Match {
+	// CAUTION:  stripping common prefix or suffix would be incorrect.
+	// E.g.,
+	//    ab
+	//    acab
+	// Longest matching block is "ab", but if common prefix is
+	// stripped, it's "a" (tied with "b").  UNIX(tm) diff does so
+	// strip, so ends up claiming that ab is changed to acab by
+	// inserting "ca" in the middle.  That's minimal but unintuitive:
+	// "it's obvious" that someone inserted "ac" at the front.
+	// Windiff ends up at the same place as diff, but by pairing up
+	// the unique 'b's and then matching the first two 'a's.
+	besti, bestj, bestsize := alo, blo, 0
+
+	// find longest junk-free match
+	// during an iteration of the loop, j2len[j] = length of longest
+	// junk-free match ending with a[i-1] and b[j]
+	j2len := map[int]int{}
+	for i := alo; i != ahi; i++ {
+		// look at all instances of a[i] in b; note that because
+		// b2j has no junk keys, the loop is skipped if a[i] is junk
+		newj2len := map[int]int{}
+		for _, j := range m.b2j[m.a[i]] {
+			// a[i] matches b[j]
+			if j < blo {
+				continue
+			}
+			if j >= bhi {
+				break
+			}
+			k := j2len[j-1] + 1
+			newj2len[j] = k
+			if k > bestsize {
+				besti, bestj, bestsize = i-k+1, j-k+1, k
+			}
+		}
+		j2len = newj2len
+	}
+
+	// Extend the best by non-junk elements on each end.  In particular,
+	// "popular" non-junk elements aren't in b2j, which greatly speeds
+	// the inner loop above, but also means "the best" match so far
+	// doesn't contain any junk *or* popular non-junk elements.
+	for besti > alo && bestj > blo && !m.isBJunk(m.b[bestj-1]) &&
+		m.a[besti-1] == m.b[bestj-1] {
+		besti, bestj, bestsize = besti-1, bestj-1, bestsize+1
+	}
+	for besti+bestsize < ahi && bestj+bestsize < bhi &&
+		!m.isBJunk(m.b[bestj+bestsize]) &&
+		m.a[besti+bestsize] == m.b[bestj+bestsize] {
+		bestsize += 1
+	}
+
+	// Now that we have a wholly interesting match (albeit possibly
+	// empty!), we may as well suck up the matching junk on each
+	// side of it too.  Can't think of a good reason not to, and it
+	// saves post-processing the (possibly considerable) expense of
+	// figuring out what to do with it.  In the case of an empty
+	// interesting match, this is clearly the right thing to do,
+	// because no other kind of match is possible in the regions.
+	for besti > alo && bestj > blo && m.isBJunk(m.b[bestj-1]) &&
+		m.a[besti-1] == m.b[bestj-1] {
+		besti, bestj, bestsize = besti-1, bestj-1, bestsize+1
+	}
+	for besti+bestsize < ahi && bestj+bestsize < bhi &&
+		m.isBJunk(m.b[bestj+bestsize]) &&
+		m.a[besti+bestsize] == m.b[bestj+bestsize] {
+		bestsize += 1
+	}
+
+	return Match{A: besti, B: bestj, Size: bestsize}
+}
+
+// Return list of triples describing matching subsequences.
+//
+// Each triple is of the form (i, j, n), and means that
+// a[i:i+n] == b[j:j+n].  The triples are monotonically increasing in
+// i and in j. It's also guaranteed that if (i, j, n) and (i', j', n') are
+// adjacent triples in the list, and the second is not the last triple in the
+// list, then i+n != i' or j+n != j'. IOW, adjacent triples never describe
+// adjacent equal blocks.
+//
+// The last triple is a dummy, (len(a), len(b), 0), and is the only
+// triple with n==0.
+func (m *SequenceMatcher) GetMatchingBlocks() []Match {
+	if m.matchingBlocks != nil {
+		return m.matchingBlocks
+	}
+
+	var matchBlocks func(alo, ahi, blo, bhi int, matched []Match) []Match
+	matchBlocks = func(alo, ahi, blo, bhi int, matched []Match) []Match {
+		match := m.findLongestMatch(alo, ahi, blo, bhi)
+		i, j, k := match.A, match.B, match.Size
+		if match.Size > 0 {
+			if alo < i && blo < j {
+				matched = matchBlocks(alo, i, blo, j, matched)
+			}
+			matched = append(matched, match)
+			if i+k < ahi && j+k < bhi {
+				matched = matchBlocks(i+k, ahi, j+k, bhi, matched)
+			}
+		}
+		return matched
+	}
+	matched := matchBlocks(0, len(m.a), 0, len(m.b), nil)
+
+	// It's possible that we have adjacent equal blocks in the
+	// matching_blocks list now.
+	nonAdjacent := []Match{}
+	i1, j1, k1 := 0, 0, 0
+	for _, b := range matched {
+		// Is this block adjacent to i1, j1, k1?
+		i2, j2, k2 := b.A, b.B, b.Size
+		if i1+k1 == i2 && j1+k1 == j2 {
+			// Yes, so collapse them -- this just increases the length of
+			// the first block by the length of the second, and the first
+			// block so lengthened remains the block to compare against.
+			k1 += k2
+		} else {
+			// Not adjacent.  Remember the first block (k1==0 means it's
+			// the dummy we started with), and make the second block the
+			// new block to compare against.
+			if k1 > 0 {
+				nonAdjacent = append(nonAdjacent, Match{i1, j1, k1})
+			}
+			i1, j1, k1 = i2, j2, k2
+		}
+	}
+	if k1 > 0 {
+		nonAdjacent = append(nonAdjacent, Match{i1, j1, k1})
+	}
+
+	nonAdjacent = append(nonAdjacent, Match{len(m.a), len(m.b), 0})
+	m.matchingBlocks = nonAdjacent
+	return m.matchingBlocks
+}
+
+// Return list of 5-tuples describing how to turn a into b.
+//
+// Each tuple is of the form (tag, i1, i2, j1, j2).  The first tuple
+// has i1 == j1 == 0, and remaining tuples have i1 == the i2 from the
+// tuple preceding it, and likewise for j1 == the previous j2.
+//
+// The tags are characters, with these meanings:
+//
+// 'r' (replace):  a[i1:i2] should be replaced by b[j1:j2]
+//
+// 'd' (delete):   a[i1:i2] should be deleted, j1==j2 in this case.
+//
+// 'i' (insert):   b[j1:j2] should be inserted at a[i1:i1], i1==i2 in this case.
+//
+// 'e' (equal):    a[i1:i2] == b[j1:j2]
+func (m *SequenceMatcher) GetOpCodes() []OpCode {
+	if m.opCodes != nil {
+		return m.opCodes
+	}
+	i, j := 0, 0
+	matching := m.GetMatchingBlocks()
+	opCodes := make([]OpCode, 0, len(matching))
+	for _, m := range matching {
+		//  invariant:  we've pumped out correct diffs to change
+		//  a[:i] into b[:j], and the next matching block is
+		//  a[ai:ai+size] == b[bj:bj+size]. So we need to pump
+		//  out a diff to change a[i:ai] into b[j:bj], pump out
+		//  the matching block, and move (i,j) beyond the match
+		ai, bj, size := m.A, m.B, m.Size
+		tag := byte(0)
+		if i < ai && j < bj {
+			tag = 'r'
+		} else if i < ai {
+			tag = 'd'
+		} else if j < bj {
+			tag = 'i'
+		}
+		if tag > 0 {
+			opCodes = append(opCodes, OpCode{tag, i, ai, j, bj})
+		}
+		i, j = ai+size, bj+size
+		// the list of matching blocks is terminated by a
+		// sentinel with size 0
+		if size > 0 {
+			opCodes = append(opCodes, OpCode{'e', ai, i, bj, j})
+		}
+	}
+	m.opCodes = opCodes
+	return m.opCodes
+}
+
+// Isolate change clusters by eliminating ranges with no changes.
+//
+// Return a generator of groups with up to n lines of context.
+// Each group is in the same format as returned by GetOpCodes().
+func (m *SequenceMatcher) GetGroupedOpCodes(n int) [][]OpCode {
+	if n < 0 {
+		n = 3
+	}
+	codes := m.GetOpCodes()
+	if len(codes) == 0 {
+		codes = []OpCode{OpCode{'e', 0, 1, 0, 1}}
+	}
+	// Fixup leading and trailing groups if they show no changes.
+	if codes[0].Tag == 'e' {
+		c := codes[0]
+		i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
+		codes[0] = OpCode{c.Tag, max(i1, i2-n), i2, max(j1, j2-n), j2}
+	}
+	if codes[len(codes)-1].Tag == 'e' {
+		c := codes[len(codes)-1]
+		i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
+		codes[len(codes)-1] = OpCode{c.Tag, i1, min(i2, i1+n), j1, min(j2, j1+n)}
+	}
+	nn := n + n
+	groups := [][]OpCode{}
+	group := []OpCode{}
+	for _, c := range codes {
+		i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
+		// End the current group and start a new one whenever
+		// there is a large range with no changes.
+		if c.Tag == 'e' && i2-i1 > nn {
+			group = append(group, OpCode{c.Tag, i1, min(i2, i1+n),
+				j1, min(j2, j1+n)})
+			groups = append(groups, group)
+			group = []OpCode{}
+			i1, j1 = max(i1, i2-n), max(j1, j2-n)
+		}
+		group = append(group, OpCode{c.Tag, i1, i2, j1, j2})
+	}
+	if len(group) > 0 && !(len(group) == 1 && group[0].Tag == 'e') {
+		groups = append(groups, group)
+	}
+	return groups
+}
+
+// Return a measure of the sequences' similarity (float in [0,1]).
+//
+// Where T is the total number of elements in both sequences, and
+// M is the number of matches, this is 2.0*M / T.
+// Note that this is 1 if the sequences are identical, and 0 if
+// they have nothing in common.
+//
+// .Ratio() is expensive to compute if you haven't already computed
+// .GetMatchingBlocks() or .GetOpCodes(), in which case you may
+// want to try .QuickRatio() or .RealQuickRation() first to get an
+// upper bound.
+func (m *SequenceMatcher) Ratio() float64 {
+	matches := 0
+	for _, m := range m.GetMatchingBlocks() {
+		matches += m.Size
+	}
+	return calculateRatio(matches, len(m.a)+len(m.b))
+}
+
+// Return an upper bound on ratio() relatively quickly.
+//
+// This isn't defined beyond that it is an upper bound on .Ratio(), and
+// is faster to compute.
+func (m *SequenceMatcher) QuickRatio() float64 {
+	// viewing a and b as multisets, set matches to the cardinality
+	// of their intersection; this counts the number of matches
+	// without regard to order, so is clearly an upper bound
+	if m.fullBCount == nil {
+		m.fullBCount = map[string]int{}
+		for _, s := range m.b {
+			m.fullBCount[s] = m.fullBCount[s] + 1
+		}
+	}
+
+	// avail[x] is the number of times x appears in 'b' less the
+	// number of times we've seen it in 'a' so far ... kinda
+	avail := map[string]int{}
+	matches := 0
+	for _, s := range m.a {
+		n, ok := avail[s]
+		if !ok {
+			n = m.fullBCount[s]
+		}
+		avail[s] = n - 1
+		if n > 0 {
+			matches += 1
+		}
+	}
+	return calculateRatio(matches, len(m.a)+len(m.b))
+}
+
+// Return an upper bound on ratio() very quickly.
+//
+// This isn't defined beyond that it is an upper bound on .Ratio(), and
+// is faster to compute than either .Ratio() or .QuickRatio().
+func (m *SequenceMatcher) RealQuickRatio() float64 {
+	la, lb := len(m.a), len(m.b)
+	return calculateRatio(min(la, lb), la+lb)
+}
+
+// Convert range to the "ed" format
+func formatRangeUnified(start, stop int) string {
+	// Per the diff spec at http://www.unix.org/single_unix_specification/
+	beginning := start + 1 // lines start numbering with one
+	length := stop - start
+	if length == 1 {
+		return fmt.Sprintf("%d", beginning)
+	}
+	if length == 0 {
+		beginning -= 1 // empty ranges begin at line just before the range
+	}
+	return fmt.Sprintf("%d,%d", beginning, length)
+}
+
+// Unified diff parameters
+type UnifiedDiff struct {
+	A        []string // First sequence lines
+	FromFile string   // First file name
+	FromDate string   // First file time
+	B        []string // Second sequence lines
+	ToFile   string   // Second file name
+	ToDate   string   // Second file time
+	Eol      string   // Headers end of line, defaults to LF
+	Context  int      // Number of context lines
+}
+
+// Compare two sequences of lines; generate the delta as a unified diff.
+//
+// Unified diffs are a compact way of showing line changes and a few
+// lines of context.  The number of context lines is set by 'n' which
+// defaults to three.
+//
+// By default, the diff control lines (those with ---, +++, or @@) are
+// created with a trailing newline.  This is helpful so that inputs
+// created from file.readlines() result in diffs that are suitable for
+// file.writelines() since both the inputs and outputs have trailing
+// newlines.
+//
+// For inputs that do not have trailing newlines, set the lineterm
+// argument to "" so that the output will be uniformly newline free.
+//
+// The unidiff format normally has a header for filenames and modification
+// times.  Any or all of these may be specified using strings for
+// 'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.
+// The modification times are normally expressed in the ISO 8601 format.
+func WriteUnifiedDiff(writer io.Writer, diff UnifiedDiff) error {
+	buf := bufio.NewWriter(writer)
+	defer buf.Flush()
+	wf := func(format string, args ...interface{}) error {
+		_, err := buf.WriteString(fmt.Sprintf(format, args...))
+		return err
+	}
+	ws := func(s string) error {
+		_, err := buf.WriteString(s)
+		return err
+	}
+
+	if len(diff.Eol) == 0 {
+		diff.Eol = "\n"
+	}
+
+	started := false
+	m := NewMatcher(diff.A, diff.B)
+	for _, g := range m.GetGroupedOpCodes(diff.Context) {
+		if !started {
+			started = true
+			fromDate := ""
+			if len(diff.FromDate) > 0 {
+				fromDate = "\t" + diff.FromDate
+			}
+			toDate := ""
+			if len(diff.ToDate) > 0 {
+				toDate = "\t" + diff.ToDate
+			}
+			if diff.FromFile != "" || diff.ToFile != "" {
+				err := wf("--- %s%s%s", diff.FromFile, fromDate, diff.Eol)
+				if err != nil {
+					return err
+				}
+				err = wf("+++ %s%s%s", diff.ToFile, toDate, diff.Eol)
+				if err != nil {
+					return err
+				}
+			}
+		}
+		first, last := g[0], g[len(g)-1]
+		range1 := formatRangeUnified(first.I1, last.I2)
+		range2 := formatRangeUnified(first.J1, last.J2)
+		if err := wf("@@ -%s +%s @@%s", range1, range2, diff.Eol); err != nil {
+			return err
+		}
+		for _, c := range g {
+			i1, i2, j1, j2 := c.I1, c.I2, c.J1, c.J2
+			if c.Tag == 'e' {
+				for _, line := range diff.A[i1:i2] {
+					if err := ws(" " + line); err != nil {
+						return err
+					}
+				}
+				continue
+			}
+			if c.Tag == 'r' || c.Tag == 'd' {
+				for _, line := range diff.A[i1:i2] {
+					if err := ws("-" + line); err != nil {
+						return err
+					}
+				}
+			}
+			if c.Tag == 'r' || c.Tag == 'i' {
+				for _, line := range diff.B[j1:j2] {
+					if err := ws("+" + line); err != nil {
+						return err
+					}
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// Like WriteUnifiedDiff but returns the diff a string.
+func GetUnifiedDiffString(diff UnifiedDiff) (string, error) {
+	w := &bytes.Buffer{}
+	err := WriteUnifiedDiff(w, diff)
+	return string(w.Bytes()), err
+}
+
+// Convert range to the "ed" format.
+func formatRangeContext(start, stop int) string {
+	// Per the diff spec at http://www.unix.org/single_unix_specification/
+	beginning := start + 1 // lines start numbering with one
+	length := stop - start
+	if length == 0 {
+		beginning -= 1 // empty ranges begin at line just before the range
+	}
+	if length <= 1 {
+		return fmt.Sprintf("%d", beginning)
+	}
+	return fmt.Sprintf("%d,%d", beginning, beginning+length-1)
+}
+
+type ContextDiff UnifiedDiff
+
+// Compare two sequences of lines; generate the delta as a context diff.
+//
+// Context diffs are a compact way of showing line changes and a few
+// lines of context. The number of context lines is set by diff.Context
+// which defaults to three.
+//
+// By default, the diff control lines (those with *** or ---) are
+// created with a trailing newline.
+//
+// For inputs that do not have trailing newlines, set the diff.Eol
+// argument to "" so that the output will be uniformly newline free.
+//
+// The context diff format normally has a header for filenames and
+// modification times.  Any or all of these may be specified using
+// strings for diff.FromFile, diff.ToFile, diff.FromDate, diff.ToDate.
+// The modification times are normally expressed in the ISO 8601 format.
+// If not specified, the strings default to blanks.
+func WriteContextDiff(writer io.Writer, diff ContextDiff) error {
+	buf := bufio.NewWriter(writer)
+	defer buf.Flush()
+	var diffErr error
+	wf := func(format string, args ...interface{}) {
+		_, err := buf.WriteString(fmt.Sprintf(format, args...))
+		if diffErr == nil && err != nil {
+			diffErr = err
+		}
+	}
+	ws := func(s string) {
+		_, err := buf.WriteString(s)
+		if diffErr == nil && err != nil {
+			diffErr = err
+		}
+	}
+
+	if len(diff.Eol) == 0 {
+		diff.Eol = "\n"
+	}
+
+	prefix := map[byte]string{
+		'i': "+ ",
+		'd': "- ",
+		'r': "! ",
+		'e': "  ",
+	}
+
+	started := false
+	m := NewMatcher(diff.A, diff.B)
+	for _, g := range m.GetGroupedOpCodes(diff.Context) {
+		if !started {
+			started = true
+			fromDate := ""
+			if len(diff.FromDate) > 0 {
+				fromDate = "\t" + diff.FromDate
+			}
+			toDate := ""
+			if len(diff.ToDate) > 0 {
+				toDate = "\t" + diff.ToDate
+			}
+			if diff.FromFile != "" || diff.ToFile != "" {
+				wf("*** %s%s%s", diff.FromFile, fromDate, diff.Eol)
+				wf("--- %s%s%s", diff.ToFile, toDate, diff.Eol)
+			}
+		}
+
+		first, last := g[0], g[len(g)-1]
+		ws("***************" + diff.Eol)
+
+		range1 := formatRangeContext(first.I1, last.I2)
+		wf("*** %s ****%s", range1, diff.Eol)
+		for _, c := range g {
+			if c.Tag == 'r' || c.Tag == 'd' {
+				for _, cc := range g {
+					if cc.Tag == 'i' {
+						continue
+					}
+					for _, line := range diff.A[cc.I1:cc.I2] {
+						ws(prefix[cc.Tag] + line)
+					}
+				}
+				break
+			}
+		}
+
+		range2 := formatRangeContext(first.J1, last.J2)
+		wf("--- %s ----%s", range2, diff.Eol)
+		for _, c := range g {
+			if c.Tag == 'r' || c.Tag == 'i' {
+				for _, cc := range g {
+					if cc.Tag == 'd' {
+						continue
+					}
+					for _, line := range diff.B[cc.J1:cc.J2] {
+						ws(prefix[cc.Tag] + line)
+					}
+				}
+				break
+			}
+		}
+	}
+	return diffErr
+}
+
+// Like WriteContextDiff but returns the diff a string.
+func GetContextDiffString(diff ContextDiff) (string, error) {
+	w := &bytes.Buffer{}
+	err := WriteContextDiff(w, diff)
+	return string(w.Bytes()), err
+}
+
+// Split a string on "\n" while preserving them. The output can be used
+// as input for UnifiedDiff and ContextDiff structures.
+func SplitLines(s string) []string {
+	lines := strings.SplitAfter(s, "\n")
+	lines[len(lines)-1] += "\n"
+	return lines
+}
diff --git a/vendor/github.com/visualfc/gotools/LICENSE b/vendor/github.com/visualfc/gotools/LICENSE
index 624d856..ca2493d 100644
--- a/vendor/github.com/visualfc/gotools/LICENSE
+++ b/vendor/github.com/visualfc/gotools/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2015, visualfc <visualfc@gmail.com>
+Copyright (c) 2011-2017, visualfc <visualfc@gmail.com>
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/vendor/github.com/visualfc/gotools/README.md b/vendor/github.com/visualfc/gotools/README.md
index a8ab9f3..7ad5359 100644
--- a/vendor/github.com/visualfc/gotools/README.md
+++ b/vendor/github.com/visualfc/gotools/README.md
@@ -1,2 +1,28 @@
-# gotools
-liteide golang tools
+LiteIDE Golang Tools
+=========
+
+### LiteIDE
+
+_LiteIDE is a simple, open source, cross-platform Go IDE._
+
+### GoTools
+_GoTools is a golang tools support for LiteIDE._
+
+### Website
+* LiteIDE Source code
+<https://github.com/visualfc/liteide>
+* Gotools Source code
+<https://github.com/visualfc/gotools>
+* Binary downloads 
+<http://sourceforge.net/projects/liteide/files>
+* Google group
+<https://groups.google.com/group/liteide-dev>
+* How to Install
+<https://github.com/visualfc/liteide/blob/master/liteidex/deploy/welcome/en/install.md>
+* FAQ
+<https://github.com/visualfc/liteide/blob/master/liteidex/deploy/welcome/en/guide.md>
+* Changes
+<https://github.com/visualfc/liteide/blob/master/liteidex/deploy/welcome/en/changes.md>
+
+### Donate
+* <http://visualfc.github.com/support>
diff --git a/vendor/github.com/visualfc/gotools/command/command.go b/vendor/github.com/visualfc/gotools/command/command.go
index a20a3fb..2f6676b 100644
--- a/vendor/github.com/visualfc/gotools/command/command.go
+++ b/vendor/github.com/visualfc/gotools/command/command.go
@@ -191,7 +191,10 @@ func Main() {
 			cmd.Stdin = Stdin
 			cmd.Stdout = Stdout
 			cmd.Stderr = Stderr
-			cmd.Run(cmd, args)
+			err := cmd.Run(cmd, args)
+			if err != nil {
+				SetExitStatus(2)
+			}
 			Exit()
 			return
 		}
diff --git a/vendor/github.com/visualfc/gotools/doc.go b/vendor/github.com/visualfc/gotools/doc.go
index 2a2e1c4..e992f7d 100644
--- a/vendor/github.com/visualfc/gotools/doc.go
+++ b/vendor/github.com/visualfc/gotools/doc.go
@@ -1,4 +1,4 @@
-// Copyright 2011-2015 visualfc <visualfc@gmail.com>. All rights reserved.
+// Copyright 2011-2017 visualfc <visualfc@gmail.com>. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/vendor/github.com/visualfc/gotools/finddecl/finddecl.go b/vendor/github.com/visualfc/gotools/finddecl/finddecl.go
new file mode 100644
index 0000000..b9f3f9c
--- /dev/null
+++ b/vendor/github.com/visualfc/gotools/finddecl/finddecl.go
@@ -0,0 +1,135 @@
+// Copyright 2011-2015 visualfc <visualfc@gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package finddecl
+
+import (
+	"errors"
+	"fmt"
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"os"
+	"path/filepath"
+	"strconv"
+
+	"github.com/visualfc/gotools/command"
+)
+
+var Command = &command.Command{
+	Run:       runFindDecl,
+	UsageLine: "finddecl",
+	Short:     "golang finddecl util",
+	Long:      `golang finddecl util.`,
+}
+var (
+	filePath string
+	fileLine int
+)
+
+func init() {
+	Command.Flag.StringVar(&filePath, "file", "", "file path")
+	Command.Flag.IntVar(&fileLine, "line", -1, "file line")
+}
+
+func runFindDecl(cmd *command.Command, args []string) error {
+	if len(filePath) == 0 || fileLine == -1 {
+		cmd.Usage()
+		return os.ErrInvalid
+	}
+	if !filepath.IsAbs(filePath) {
+		dir, err := os.Getwd()
+		if err != nil {
+			return err
+		}
+		filePath = filepath.Join(dir, filePath)
+	}
+
+	fset := token.NewFileSet()
+	f, err := parser.ParseFile(fset, filePath, nil, 0)
+	if err != nil {
+		return err
+	}
+	decl := findDecl(fset, f, fileLine)
+	if decl == nil {
+		fmt.Println("-")
+		return errors.New("error find decl")
+	}
+	printDecl(fset, decl, fileLine)
+	return nil
+}
+
+type Info struct {
+	Type      string
+	Name      string
+	BeginLine int
+	EndLine   int
+}
+
+func printDecl(fset *token.FileSet, decl ast.Decl, line int) {
+	var tag string
+	var name string
+
+	tag = "-"
+	name = "-"
+	switch d := decl.(type) {
+	case *ast.GenDecl:
+		switch d.Tok {
+		case token.IMPORT:
+			tag = "import"
+			if len(d.Specs) > 0 {
+				if ts := d.Specs[0].(*ast.ImportSpec); ts != nil {
+					name, _ = strconv.Unquote(ts.Path.Value)
+				}
+			}
+		case token.TYPE:
+			tag = "type"
+			if len(d.Specs) > 0 {
+				if ts := d.Specs[0].(*ast.TypeSpec); ts != nil {
+					name = ts.Name.Name
+					switch ts.Type.(type) {
+					case *ast.StructType:
+						tag = "struct"
+					case *ast.InterfaceType:
+						tag = "interface"
+					default:
+						tag = "type"
+					}
+				}
+			}
+		case token.VAR, token.CONST:
+			tag = d.Tok.String()
+			var testName string
+			for _, ds := range d.Specs {
+				if ts := ds.(*ast.ValueSpec); ts != nil {
+					name = ts.Names[0].Name
+					for _, n := range ts.Names {
+						if line >= fset.Position(n.Pos()).Line && line <= fset.Position(n.End()).Line {
+							testName = n.Name
+							break
+						}
+					}
+				}
+			}
+			if testName != "" {
+				name = testName
+			}
+		default:
+			tag = d.Tok.String()
+		}
+	case *ast.FuncDecl:
+		tag = "func"
+		name = d.Name.Name
+	}
+	fmt.Println(tag, name, fset.Position(decl.Pos()).Line, fset.Position(decl.End()).Line)
+}
+
+func findDecl(fset *token.FileSet, file *ast.File, line int) ast.Decl {
+	for _, decl := range file.Decls {
+		if line >= fset.Position(decl.Pos()).Line && line <= fset.Position(decl.End()).Line {
+			return decl
+		}
+	}
+	return nil
+}
diff --git a/vendor/github.com/visualfc/gotools/godiff/godiff.go b/vendor/github.com/visualfc/gotools/godiff/godiff.go
new file mode 100644
index 0000000..f4169aa
--- /dev/null
+++ b/vendor/github.com/visualfc/gotools/godiff/godiff.go
@@ -0,0 +1,64 @@
+// Copyright 2011-2015 visualfc <visualfc@gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package godiff
+
+import (
+	"io/ioutil"
+	"os"
+	"os/exec"
+
+	"github.com/pmezard/go-difflib/difflib"
+)
+
+func UnifiedDiffLines(a []string, b []string) (string, error) {
+	diff := difflib.UnifiedDiff{
+		A:        a,
+		B:        b,
+		FromFile: "Original",
+		ToFile:   "Current",
+		Context:  3,
+		Eol:      "\n",
+	}
+	return difflib.GetUnifiedDiffString(diff)
+}
+
+func UnifiedDiffString(a string, b string) (string, error) {
+	diff := difflib.UnifiedDiff{
+		A:        difflib.SplitLines(a),
+		B:        difflib.SplitLines(b),
+		FromFile: "Original",
+		ToFile:   "Current",
+		Context:  3,
+		Eol:      "\n",
+	}
+	return difflib.GetUnifiedDiffString(diff)
+}
+
+func UnifiedDiffBytesByCmd(b1, b2 []byte) (data []byte, err error) {
+	f1, err := ioutil.TempFile("", "godiff")
+	if err != nil {
+		return
+	}
+	defer os.Remove(f1.Name())
+	defer f1.Close()
+
+	f2, err := ioutil.TempFile("", "godiff")
+	if err != nil {
+		return
+	}
+	defer os.Remove(f2.Name())
+	defer f2.Close()
+
+	f1.Write(b1)
+	f2.Write(b2)
+
+	data, err = exec.Command("diff", "-u", f1.Name(), f2.Name()).CombinedOutput()
+	if len(data) > 0 {
+		// diff exits with a non-zero status when the files don't match.
+		// Ignore that failure as long as we get output.
+		err = nil
+	}
+	return
+}
diff --git a/vendor/github.com/visualfc/gotools/gofmt/gofmt.go b/vendor/github.com/visualfc/gotools/gofmt/gofmt.go
new file mode 100644
index 0000000..af10755
--- /dev/null
+++ b/vendor/github.com/visualfc/gotools/gofmt/gofmt.go
@@ -0,0 +1,198 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gofmt
+
+import (
+	"bytes"
+	"fmt"
+	"go/scanner"
+	"go/token"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"sync"
+
+	"github.com/visualfc/gotools/command"
+	"github.com/visualfc/gotools/godiff"
+	"golang.org/x/tools/imports"
+)
+
+var Command = &command.Command{
+	Run:       runGofmt,
+	UsageLine: "gofmt [flags] [path ...]",
+	Short:     "gofmt formats Go source.",
+	Long:      `gofmt formats Go source`,
+}
+
+var (
+	gofmtList         bool
+	gofmtWrite        bool
+	gofmtDiff         bool
+	gofmtAllErrors    bool
+	gofmtFixImports   bool
+	gofmtSortImports  bool
+	gofmtUseGodiffLib bool
+
+	// layout control
+	gofmtComments  bool
+	gofmtTabWidth  int
+	gofmtTabIndent bool
+)
+
+//func init
+func init() {
+	Command.Flag.BoolVar(&gofmtList, "l", false, "list files whose formatting differs from goimport's")
+	Command.Flag.BoolVar(&gofmtWrite, "w", false, "write result to (source) file instead of stdout")
+	Command.Flag.BoolVar(&gofmtDiff, "d", false, "display diffs instead of rewriting files")
+	Command.Flag.BoolVar(&gofmtAllErrors, "e", false, "report all errors (not just the first 10 on different lines)")
+	Command.Flag.BoolVar(&gofmtFixImports, "fiximports", false, "updates Go import lines, adding missing ones and removing unreferenced ones")
+	Command.Flag.BoolVar(&gofmtSortImports, "sortimports", false, "sort Go import lines use goimports style")
+	Command.Flag.BoolVar(&gofmtUseGodiffLib, "godiff", true, "diff use godiff library")
+
+	// layout control
+	Command.Flag.BoolVar(&gofmtComments, "comments", true, "print comments")
+	Command.Flag.IntVar(&gofmtTabWidth, "tabwidth", 8, "tab width")
+	Command.Flag.BoolVar(&gofmtTabIndent, "tabs", true, "indent with tabs")
+}
+
+var (
+	fileSet  = token.NewFileSet() // per process FileSet
+	exitCode = 0
+
+	initModesOnce sync.Once // guards calling initModes
+	//parserMode    parser.Mode
+	//printerMode   printer.Mode
+	options *imports.Options
+)
+
+func report(err error) {
+	scanner.PrintError(os.Stderr, err)
+	exitCode = 2
+}
+
+func runGofmt(cmd *command.Command, args []string) error {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+
+	if gofmtTabWidth < 0 {
+		fmt.Fprintf(os.Stderr, "negative tabwidth %d\n", gofmtTabWidth)
+		exitCode = 2
+		os.Exit(exitCode)
+		return os.ErrInvalid
+	}
+
+	if gofmtFixImports {
+		gofmtSortImports = true
+	}
+
+	options = &imports.Options{
+		FormatOnly: !gofmtFixImports,
+		TabWidth:   gofmtTabWidth,
+		TabIndent:  gofmtTabIndent,
+		Comments:   gofmtComments,
+		AllErrors:  gofmtAllErrors,
+		Fragment:   true,
+	}
+
+	if len(args) == 0 {
+		if err := processFile("<standard input>", os.Stdin, os.Stdout, true); err != nil {
+			report(err)
+		}
+	} else {
+		for _, path := range args {
+			switch dir, err := os.Stat(path); {
+			case err != nil:
+				report(err)
+			case dir.IsDir():
+				walkDir(path)
+			default:
+				if err := processFile(path, nil, os.Stdout, false); err != nil {
+					report(err)
+				}
+			}
+		}
+	}
+	os.Exit(exitCode)
+	return nil
+}
+
+func isGoFile(f os.FileInfo) bool {
+	// ignore non-Go files
+	name := f.Name()
+	return !f.IsDir() && !strings.HasPrefix(name, ".") && strings.HasSuffix(name, ".go")
+}
+
+func processFile(filename string, in io.Reader, out io.Writer, stdin bool) error {
+	if in == nil {
+		f, err := os.Open(filename)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+		in = f
+	}
+
+	src, err := ioutil.ReadAll(in)
+	if err != nil {
+		return err
+	}
+
+	res, err := imports.Process(filename, src, options)
+	if err != nil {
+		return err
+	}
+
+	if !bytes.Equal(src, res) {
+		// formatting has changed
+		if gofmtList {
+			fmt.Fprintln(out, filename)
+		}
+		if gofmtWrite {
+			err = ioutil.WriteFile(filename, res, 0)
+			if err != nil {
+				return err
+			}
+		}
+		if gofmtDiff {
+			if gofmtUseGodiffLib {
+				data, err := godiff.UnifiedDiffString(string(src), string(res))
+				if err != nil {
+					return fmt.Errorf("computing diff: %s", err)
+				}
+				fmt.Printf("diff %s gofmt/%s\n", filename, filename)
+				out.Write([]byte(data))
+			} else {
+				data, err := godiff.UnifiedDiffBytesByCmd(src, res)
+				if err != nil {
+					return fmt.Errorf("computing diff: %s", err)
+				}
+				fmt.Printf("diff %s gofmt/%s\n", filename, filename)
+				out.Write(data)
+			}
+		}
+	}
+
+	if !gofmtList && !gofmtWrite && !gofmtDiff {
+		_, err = out.Write(res)
+	}
+
+	return err
+}
+
+func visitFile(path string, f os.FileInfo, err error) error {
+	if err == nil && isGoFile(f) {
+		err = processFile(path, nil, os.Stdout, false)
+	}
+	if err != nil {
+		report(err)
+	}
+	return nil
+}
+
+func walkDir(path string) {
+	filepath.Walk(path, visitFile)
+}
diff --git a/vendor/github.com/visualfc/gotools/gotest/gotest.go b/vendor/github.com/visualfc/gotools/gotest/gotest.go
new file mode 100644
index 0000000..5098686
--- /dev/null
+++ b/vendor/github.com/visualfc/gotools/gotest/gotest.go
@@ -0,0 +1,99 @@
+// Copyright 2011-2015 visualfc <visualfc@gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gotest
+
+import (
+	"fmt"
+	"go/build"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/visualfc/gotools/command"
+)
+
+var Command = &command.Command{
+	Run:         runGotest,
+	UsageLine:   "gotest -f filename [build/test flags]",
+	Short:       "go test go filename",
+	Long:        `go test go filename`,
+	CustomFlags: true,
+}
+
+var testFileName string
+var testFileArgs string
+
+//func init() {
+//	Command.Flag.StringVar(&testFileName, "f", "", "test go filename")
+//}
+
+func runGotest(cmd *command.Command, args []string) error {
+	index := -1
+	for n, arg := range args {
+		if arg == "-f" {
+			index = n
+			break
+		}
+	}
+	if index >= 0 && index < len(args) {
+		testFileName = args[index+1]
+		var r []string
+		r = append(r, args[0:index]...)
+		r = append(r, args[index+2:]...)
+		args = r
+	}
+
+	if testFileName == "" {
+		cmd.Usage()
+		return os.ErrInvalid
+	}
+	if !strings.HasSuffix(testFileName, "_test.go") {
+		fmt.Println("The test filename must xxx_test.go")
+		return os.ErrInvalid
+	}
+
+	pkg, err := build.ImportDir(".", 0)
+	if err != nil {
+		fmt.Println("import dir error", err)
+		return err
+	}
+
+	var testFiles []string
+
+	for _, file := range pkg.XTestGoFiles {
+		if file == testFileName {
+			testFiles = append(testFiles, file)
+			break
+		}
+	}
+	for _, file := range pkg.TestGoFiles {
+		if file == testFileName {
+			testFiles = append(testFiles, pkg.GoFiles...)
+			testFiles = append(testFiles, file)
+			break
+		}
+	}
+
+	gobin, err := exec.LookPath("go")
+	if err != nil {
+		fmt.Println("error look go", err)
+		return err
+	}
+
+	var testArgs []string
+	testArgs = append(testArgs, "test")
+	if len(args) > 0 {
+		testArgs = append(testArgs, args...)
+	}
+	testArgs = append(testArgs, testFiles...)
+
+	command := exec.Command(gobin, testArgs...)
+	command.Dir = pkg.Dir
+	command.Stdin = os.Stdin
+	command.Stdout = os.Stdout
+	command.Stderr = os.Stderr
+
+	return command.Run()
+}
diff --git a/vendor/github.com/visualfc/gotools/main.go b/vendor/github.com/visualfc/gotools/main.go
index bc14399..eb0d28c 100644
--- a/vendor/github.com/visualfc/gotools/main.go
+++ b/vendor/github.com/visualfc/gotools/main.go
@@ -1,4 +1,4 @@
-// Copyright 2011-2015 visualfc <visualfc@gmail.com>. All rights reserved.
+// Copyright 2011-2017 visualfc <visualfc@gmail.com>. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
@@ -8,14 +8,17 @@ import (
 	"github.com/visualfc/gotools/astview"
 	"github.com/visualfc/gotools/command"
 	"github.com/visualfc/gotools/docview"
+	"github.com/visualfc/gotools/finddecl"
 	"github.com/visualfc/gotools/finddoc"
 	"github.com/visualfc/gotools/goapi"
-	"github.com/visualfc/gotools/goimports"
+	"github.com/visualfc/gotools/gofmt"
 	"github.com/visualfc/gotools/gopresent"
+	"github.com/visualfc/gotools/gotest"
 	"github.com/visualfc/gotools/jsonfmt"
 	"github.com/visualfc/gotools/oracle"
 	"github.com/visualfc/gotools/pkgs"
 	"github.com/visualfc/gotools/runcmd"
+	"github.com/visualfc/gotools/terminal"
 	"github.com/visualfc/gotools/types"
 )
 
@@ -26,16 +29,19 @@ func init() {
 	command.Register(runcmd.Command)
 	command.Register(docview.Command)
 	command.Register(astview.Command)
-	command.Register(goimports.Command)
 	command.Register(gopresent.Command)
 	command.Register(goapi.Command)
 	command.Register(pkgs.Command)
 	command.Register(oracle.Command)
+	command.Register(gofmt.Command)
+	command.Register(gotest.Command)
+	command.Register(finddecl.Command)
+	command.Register(terminal.Command)
 }
 
 func main() {
 	command.AppName = "gotools"
-	command.AppVersion = "1.0"
+	command.AppVersion = "1.9"
 	command.AppInfo = "Go tools for liteide."
 	command.Main()
 }
diff --git a/vendor/github.com/visualfc/gotools/terminal/command.go b/vendor/github.com/visualfc/gotools/terminal/command.go
new file mode 100644
index 0000000..32e8253
--- /dev/null
+++ b/vendor/github.com/visualfc/gotools/terminal/command.go
@@ -0,0 +1,33 @@
+// +build !windows
+
+package terminal
+
+import (
+	"io"
+	"os"
+	"os/exec"
+
+	"github.com/kr/pty"
+)
+
+func GetShell() (cmd string, args []string) {
+	return "/bin/sh", []string{"-l", "-i"}
+}
+
+func Execute(c *exec.Cmd) error {
+	f, err := pty.Start(c)
+	if err != nil {
+		return nil
+	}
+	go func() {
+		for {
+			io.Copy(f, os.Stdin)
+		}
+	}()
+	go func() {
+		for {
+			io.Copy(os.Stdout, f)
+		}
+	}()
+	return c.Wait()
+}
diff --git a/vendor/github.com/visualfc/gotools/terminal/command_windows.go b/vendor/github.com/visualfc/gotools/terminal/command_windows.go
new file mode 100644
index 0000000..18bc5f6
--- /dev/null
+++ b/vendor/github.com/visualfc/gotools/terminal/command_windows.go
@@ -0,0 +1,34 @@
+// +build windows
+
+package terminal
+
+import (
+	"os"
+	"os/exec"
+)
+
+func checkFiles(names ...string) string {
+	for _, name := range names {
+		_, err := os.Stat(name)
+		if err == nil {
+			return name
+		}
+	}
+	return ""
+}
+
+func GetShell() (cmd string, args []string) {
+	windir := os.Getenv("windir")
+	if windir == "" {
+		windir = "c:\\windows"
+	}
+	cmd = checkFiles(windir+"\\Sysnative\\cmd.exe", windir+"\\System32\\cmd.exe")
+	return
+}
+
+func Execute(c *exec.Cmd) error {
+	c.Stdin = os.Stdin
+	c.Stdout = os.Stdout
+	c.Stderr = os.Stderr
+	return c.Run()
+}
diff --git a/vendor/github.com/visualfc/gotools/terminal/terminal.go b/vendor/github.com/visualfc/gotools/terminal/terminal.go
new file mode 100644
index 0000000..8138a49
--- /dev/null
+++ b/vendor/github.com/visualfc/gotools/terminal/terminal.go
@@ -0,0 +1,39 @@
+// Copyright 2011-2017 visualfc <visualfc@gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+package terminal
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/visualfc/gotools/command"
+)
+
+var Command = &command.Command{
+	Run:         runTerminal,
+	UsageLine:   "terminal [program_name arguments...]",
+	Short:       "terminal [program]",
+	Long:        `terminal program and arguments`,
+	CustomFlags: true,
+}
+
+func runTerminal(cmd *command.Command, args []string) (err error) {
+	var c *exec.Cmd
+	if len(args) >= 1 {
+		var carg []string
+		if len(args) >= 2 {
+			carg = append(carg, args[1:]...)
+		}
+		c = exec.Command(args[0], carg...)
+	} else {
+		shellCmd, shellArgs := GetShell()
+		c = exec.Command(shellCmd, shellArgs...)
+	}
+	if c == nil {
+		return os.ErrInvalid
+	}
+	err = Execute(c)
+
+	return
+}
diff --git a/vendor/golang.org/x/tools/imports/mkindex.go b/vendor/golang.org/x/tools/imports/mkindex.go
deleted file mode 100644
index 755e239..0000000
--- a/vendor/golang.org/x/tools/imports/mkindex.go
+++ /dev/null
@@ -1,173 +0,0 @@
-// +build ignore
-
-// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Command mkindex creates the file "pkgindex.go" containing an index of the Go
-// standard library. The file is intended to be built as part of the imports
-// package, so that the package may be used in environments where a GOROOT is
-// not available (such as App Engine).
-package main
-
-import (
-	"bytes"
-	"fmt"
-	"go/ast"
-	"go/build"
-	"go/format"
-	"go/parser"
-	"go/token"
-	"io/ioutil"
-	"log"
-	"os"
-	"path"
-	"path/filepath"
-	"strings"
-)
-
-var (
-	pkgIndex = make(map[string][]pkg)
-	exports  = make(map[string]map[string]bool)
-)
-
-func main() {
-	// Don't use GOPATH.
-	ctx := build.Default
-	ctx.GOPATH = ""
-
-	// Populate pkgIndex global from GOROOT.
-	for _, path := range ctx.SrcDirs() {
-		f, err := os.Open(path)
-		if err != nil {
-			log.Print(err)
-			continue
-		}
-		children, err := f.Readdir(-1)
-		f.Close()
-		if err != nil {
-			log.Print(err)
-			continue
-		}
-		for _, child := range children {
-			if child.IsDir() {
-				loadPkg(path, child.Name())
-			}
-		}
-	}
-	// Populate exports global.
-	for _, ps := range pkgIndex {
-		for _, p := range ps {
-			e := loadExports(p.dir)
-			if e != nil {
-				exports[p.dir] = e
-			}
-		}
-	}
-
-	// Construct source file.
-	var buf bytes.Buffer
-	fmt.Fprint(&buf, pkgIndexHead)
-	fmt.Fprintf(&buf, "var pkgIndexMaster = %#v\n", pkgIndex)
-	fmt.Fprintf(&buf, "var exportsMaster = %#v\n", exports)
-	src := buf.Bytes()
-
-	// Replace main.pkg type name with pkg.
-	src = bytes.Replace(src, []byte("main.pkg"), []byte("pkg"), -1)
-	// Replace actual GOROOT with "/go".
-	src = bytes.Replace(src, []byte(ctx.GOROOT), []byte("/go"), -1)
-	// Add some line wrapping.
-	src = bytes.Replace(src, []byte("}, "), []byte("},\n"), -1)
-	src = bytes.Replace(src, []byte("true, "), []byte("true,\n"), -1)
-
-	var err error
-	src, err = format.Source(src)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	// Write out source file.
-	err = ioutil.WriteFile("pkgindex.go", src, 0644)
-	if err != nil {
-		log.Fatal(err)
-	}
-}
-
-const pkgIndexHead = `package imports
-
-func init() {
-	pkgIndexOnce.Do(func() {
-		pkgIndex.m = pkgIndexMaster
-	})
-	loadExports = func(dir string) map[string]bool {
-		return exportsMaster[dir]
-	}
-}
-`
-
-type pkg struct {
-	importpath string // full pkg import path, e.g. "net/http"
-	dir        string // absolute file path to pkg directory e.g. "/usr/lib/go/src/fmt"
-}
-
-var fset = token.NewFileSet()
-
-func loadPkg(root, importpath string) {
-	shortName := path.Base(importpath)
-	if shortName == "testdata" {
-		return
-	}
-
-	dir := filepath.Join(root, importpath)
-	pkgIndex[shortName] = append(pkgIndex[shortName], pkg{
-		importpath: importpath,
-		dir:        dir,
-	})
-
-	pkgDir, err := os.Open(dir)
-	if err != nil {
-		return
-	}
-	children, err := pkgDir.Readdir(-1)
-	pkgDir.Close()
-	if err != nil {
-		return
-	}
-	for _, child := range children {
-		name := child.Name()
-		if name == "" {
-			continue
-		}
-		if c := name[0]; c == '.' || ('0' <= c && c <= '9') {
-			continue
-		}
-		if child.IsDir() {
-			loadPkg(root, filepath.Join(importpath, name))
-		}
-	}
-}
-
-func loadExports(dir string) map[string]bool {
-	exports := make(map[string]bool)
-	buildPkg, err := build.ImportDir(dir, 0)
-	if err != nil {
-		if strings.Contains(err.Error(), "no buildable Go source files in") {
-			return nil
-		}
-		log.Printf("could not import %q: %v", dir, err)
-		return nil
-	}
-	for _, file := range buildPkg.GoFiles {
-		f, err := parser.ParseFile(fset, filepath.Join(dir, file), nil, 0)
-		if err != nil {
-			log.Printf("could not parse %q: %v", file, err)
-			continue
-		}
-		for name := range f.Scope.Objects {
-			if ast.IsExported(name) {
-				exports[name] = true
-			}
-		}
-	}
-	return exports
-}
diff --git a/vendor/golang.org/x/tools/imports/mkstdlib.go b/vendor/golang.org/x/tools/imports/mkstdlib.go
deleted file mode 100644
index c43d325..0000000
--- a/vendor/golang.org/x/tools/imports/mkstdlib.go
+++ /dev/null
@@ -1,90 +0,0 @@
-// +build ignore
-
-// mkstdlib generates the zstdlib.go file, containing the Go standard
-// library API symbols. It's baked into the binary to avoid scanning
-// GOPATH in the common case.
-package main
-
-import (
-	"bufio"
-	"bytes"
-	"fmt"
-	"go/format"
-	"io"
-	"log"
-	"os"
-	"path"
-	"path/filepath"
-	"regexp"
-	"sort"
-	"strings"
-)
-
-func mustOpen(name string) io.Reader {
-	f, err := os.Open(name)
-	if err != nil {
-		log.Fatal(err)
-	}
-	return f
-}
-
-func api(base string) string {
-	return filepath.Join(os.Getenv("GOROOT"), "api", base)
-}
-
-var sym = regexp.MustCompile(`^pkg (\S+).*?, (?:var|func|type|const) ([A-Z]\w*)`)
-
-func main() {
-	var buf bytes.Buffer
-	outf := func(format string, args ...interface{}) {
-		fmt.Fprintf(&buf, format, args...)
-	}
-	outf("// AUTO-GENERATED BY mkstdlib.go\n\n")
-	outf("package imports\n")
-	outf("var stdlib = map[string]string{\n")
-	f := io.MultiReader(
-		mustOpen(api("go1.txt")),
-		mustOpen(api("go1.1.txt")),
-		mustOpen(api("go1.2.txt")),
-	)
-	sc := bufio.NewScanner(f)
-	fullImport := map[string]string{} // "zip.NewReader" => "archive/zip"
-	ambiguous := map[string]bool{}
-	var keys []string
-	for sc.Scan() {
-		l := sc.Text()
-		has := func(v string) bool { return strings.Contains(l, v) }
-		if has("struct, ") || has("interface, ") || has(", method (") {
-			continue
-		}
-		if m := sym.FindStringSubmatch(l); m != nil {
-			full := m[1]
-			key := path.Base(full) + "." + m[2]
-			if exist, ok := fullImport[key]; ok {
-				if exist != full {
-					ambiguous[key] = true
-				}
-			} else {
-				fullImport[key] = full
-				keys = append(keys, key)
-			}
-		}
-	}
-	if err := sc.Err(); err != nil {
-		log.Fatal(err)
-	}
-	sort.Strings(keys)
-	for _, key := range keys {
-		if ambiguous[key] {
-			outf("\t// %q is ambiguous\n", key)
-		} else {
-			outf("\t%q: %q,\n", key, fullImport[key])
-		}
-	}
-	outf("}\n")
-	fmtbuf, err := format.Source(buf.Bytes())
-	if err != nil {
-		log.Fatal(err)
-	}
-	os.Stdout.Write(fmtbuf)
-}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 07d1218..0be34c5 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -5,8 +5,8 @@
 		{
 			"checksumSHA1": "ZesPb1w0u5/uv/fdVc+G6wOee30=",
 			"path": "github.com/b3log/wide",
-			"revision": "bfd836c6fc8fbc007ce437db1406455493cd532f",
-			"revisionTime": "2018-03-13T04:57:02Z"
+			"revision": "0a51a03f35a3fa9edbfa790698aa615f4dd49783",
+			"revisionTime": "2018-03-13T05:05:45Z"
 		},
 		{
 			"checksumSHA1": "83iEp3SqOoIkZUYyR7BOVP4vaGE=",
@@ -44,6 +44,13 @@
 			"revision": "a3ec486e6a7a41858210b0fc5d7b5df593b3c4a3",
 			"revisionTime": "2015-05-30T03:03:52Z"
 		},
+		{
+			"checksumSHA1": "8jdAN2n9kJasxFmikoyDZAbv8ig=",
+			"origin": "github.com/visualfc/gotools/vendor/github.com/kr/pty",
+			"path": "github.com/kr/pty",
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
+		},
 		{
 			"checksumSHA1": "gKm38IQHqLfYHwS7B6JDTJzXYYI=",
 			"path": "github.com/nsf/gocode",
@@ -51,10 +58,17 @@
 			"revisionTime": "2018-01-07T08:36:41Z"
 		},
 		{
-			"checksumSHA1": "4fp/TH5nX7seO5p4qJfIj/BokbI=",
+			"checksumSHA1": "R3yk3OJzuq4MVfVGX5AhkkYv1ko=",
+			"origin": "github.com/visualfc/gotools/vendor/github.com/pmezard/go-difflib/difflib",
+			"path": "github.com/pmezard/go-difflib/difflib",
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
+		},
+		{
+			"checksumSHA1": "+1Mo4q3vpSB8ibclS1t/AWeDQ50=",
 			"path": "github.com/visualfc/gotools",
-			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
-			"revisionTime": "2015-04-09T14:25:36Z"
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
 		},
 		{
 			"checksumSHA1": "QBwzyczN2ftqO2Vxag5TS79q32E=",
@@ -63,10 +77,10 @@
 			"revisionTime": "2015-04-09T14:25:36Z"
 		},
 		{
-			"checksumSHA1": "wqPqP7RGlukrSMzGKVk1tvyWh1o=",
+			"checksumSHA1": "02f7N5GTTddWpIDhsRthRKZs4nI=",
 			"path": "github.com/visualfc/gotools/command",
-			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
-			"revisionTime": "2015-04-09T14:25:36Z"
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
 		},
 		{
 			"checksumSHA1": "sA2FN414rFhNEgac/a0IyUR8dMA=",
@@ -74,6 +88,12 @@
 			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
 			"revisionTime": "2015-04-09T14:25:36Z"
 		},
+		{
+			"checksumSHA1": "5sCU5oJIkeXHHhzNyzusSH+de/8=",
+			"path": "github.com/visualfc/gotools/finddecl",
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
+		},
 		{
 			"checksumSHA1": "LvxdwB9kJ77cFS4qiRAh9ts2nz4=",
 			"path": "github.com/visualfc/gotools/finddoc",
@@ -86,6 +106,18 @@
 			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
 			"revisionTime": "2015-04-09T14:25:36Z"
 		},
+		{
+			"checksumSHA1": "o0usAkdrTaqufvGTZu++Cc/DVMM=",
+			"path": "github.com/visualfc/gotools/godiff",
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
+		},
+		{
+			"checksumSHA1": "Wnc0wf1qEhXNdqLPMlIA3vCPpPY=",
+			"path": "github.com/visualfc/gotools/gofmt",
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
+		},
 		{
 			"checksumSHA1": "RLl3M7ywfbgNYR2HfBywCruQz9c=",
 			"path": "github.com/visualfc/gotools/goimports",
@@ -98,6 +130,12 @@
 			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
 			"revisionTime": "2015-04-09T14:25:36Z"
 		},
+		{
+			"checksumSHA1": "f8zd5auG22z/GqXqW9giRDYEw6A=",
+			"path": "github.com/visualfc/gotools/gotest",
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
+		},
 		{
 			"checksumSHA1": "kyKBo2ux+HflucDj/qzoko5YoMA=",
 			"path": "github.com/visualfc/gotools/jsonfmt",
@@ -128,6 +166,12 @@
 			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
 			"revisionTime": "2015-04-09T14:25:36Z"
 		},
+		{
+			"checksumSHA1": "6CSw3Gtu+hJ6QTfhJ+985cualxs=",
+			"path": "github.com/visualfc/gotools/terminal",
+			"revision": "a74583d2ad8773983f273657291df981033308a4",
+			"revisionTime": "2018-02-17T01:27:43Z"
+		},
 		{
 			"checksumSHA1": "qlJsyinWZ07PaOyTYyxXOmhDN/I=",
 			"path": "github.com/visualfc/gotools/types",
@@ -220,7 +264,7 @@
 			"revision": ""
 		},
 		{
-			"checksumSHA1": "p3oUXqh8ecOL76mLRB5h/Qlz9lE=",
+			"checksumSHA1": "TzQP7S5QaE3ipab7SNo/PcFb2bI=",
 			"path": "golang.org/x/tools/imports",
 			"revision": ""
 		},