manually add dependency on go-getter

vendor/github.com/ulikunitz/xz/internal/term/ioctl_bsd.go

@@ -0,0 +1,11 @@
+// Copyright 2014-2017 Ulrich Kunitz. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package term
+
+import "syscall"
+
+const ioctlGetTermios = syscall.TIOCGETA

vendor/github.com/ulikunitz/xz/internal/term/ioctl_linux.go

@@ -0,0 +1,7 @@
+// Copyright 2014-2017 Ulrich Kunitz. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package term
+
+const ioctlGetTermios = 0x5401 // syscall.TCGETS

vendor/github.com/ulikunitz/xz/internal/term/isterminal.go

@@ -0,0 +1,21 @@
+// Copyright 2014-2017 Ulrich Kunitz. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux,!appengine netbsd openbsd
+
+// Package term provides the IsTerminal function.
+package term
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// IsTerminal returns true if the given file descriptor is a terminal.
+func IsTerminal(fd uintptr) bool {
+	var termios syscall.Termios
+	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd,
+		ioctlGetTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
+	return err == 0
+}

vendor/github.com/ulikunitz/xz/internal/term/isterminal_windows.go

@@ -0,0 +1,22 @@
+// Copyright 2014-2017 Ulrich Kunitz. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package term
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+var kernel32 = syscall.NewLazyDLL("kernel32.dll")
+
+var getConsoleMode = kernel32.NewProc("GetConsoleMode")
+
+// IsTerminal returns true if the given file descriptor is a terminal.
+func IsTerminal(fd uintptr) bool {
+	var st uint32
+	r, _, e := syscall.Syscall(getConsoleMode.Addr(),
+		2, fd, uintptr(unsafe.Pointer(&st)), 0)
+	return r != 0 && e == 0
+}