vendor: only vendor on emitted binaries

Moves the vendor/ directory to cmd/vendor. Vendored binaries are built
from cmd/, which is backed by symlinks pointing back to repo root.

vendor/github.com/bgentry/speakeasy/speakeasy_unix.go

@@ -1,93 +0,0 @@
-// based on https://code.google.com/p/gopass
-// Author: johnsiilver@gmail.com (John Doak)
-//
-// Original code is based on code by RogerV in the golang-nuts thread:
-// https://groups.google.com/group/golang-nuts/browse_thread/thread/40cc41e9d9fc9247
-
-// +build darwin freebsd linux netbsd openbsd solaris
-
-package speakeasy
-
-import (
-	"fmt"
-	"os"
-	"os/signal"
-	"strings"
-	"syscall"
-)
-
-const sttyArg0 = "/bin/stty"
-
-var (
-	sttyArgvEOff = []string{"stty", "-echo"}
-	sttyArgvEOn  = []string{"stty", "echo"}
-)
-
-// getPassword gets input hidden from the terminal from a user. This is
-// accomplished by turning off terminal echo, reading input from the user and
-// finally turning on terminal echo.
-func getPassword() (password string, err error) {
-	sig := make(chan os.Signal, 10)
-	brk := make(chan bool)
-
-	// File descriptors for stdin, stdout, and stderr.
-	fd := []uintptr{os.Stdin.Fd(), os.Stdout.Fd(), os.Stderr.Fd()}
-
-	// Setup notifications of termination signals to channel sig, create a process to
-	// watch for these signals so we can turn back on echo if need be.
-	signal.Notify(sig, syscall.SIGHUP, syscall.SIGINT, syscall.SIGKILL, syscall.SIGQUIT,
-		syscall.SIGTERM)
-	go catchSignal(fd, sig, brk)
-
-	// Turn off the terminal echo.
-	pid, err := echoOff(fd)
-	if err != nil {
-		return "", err
-	}
-
-	// Turn on the terminal echo and stop listening for signals.
-	defer signal.Stop(sig)
-	defer close(brk)
-	defer echoOn(fd)
-
-	syscall.Wait4(pid, nil, 0, nil)
-
-	line, err := readline()
-	if err == nil {
-		password = strings.TrimSpace(line)
-	} else {
-		err = fmt.Errorf("failed during password entry: %s", err)
-	}
-
-	return password, err
-}
-
-// echoOff turns off the terminal echo.
-func echoOff(fd []uintptr) (int, error) {
-	pid, err := syscall.ForkExec(sttyArg0, sttyArgvEOff, &syscall.ProcAttr{Dir: "", Files: fd})
-	if err != nil {
-		return 0, fmt.Errorf("failed turning off console echo for password entry:\n\t%s", err)
-	}
-	return pid, nil
-}
-
-// echoOn turns back on the terminal echo.
-func echoOn(fd []uintptr) {
-	// Turn on the terminal echo.
-	pid, e := syscall.ForkExec(sttyArg0, sttyArgvEOn, &syscall.ProcAttr{Dir: "", Files: fd})
-	if e == nil {
-		syscall.Wait4(pid, nil, 0, nil)
-	}
-}
-
-// catchSignal tries to catch SIGKILL, SIGQUIT and SIGINT so that we can turn
-// terminal echo back on before the program ends. Otherwise the user is left
-// with echo off on their terminal.
-func catchSignal(fd []uintptr, sig chan os.Signal, brk chan bool) {
-	select {
-	case <-sig:
-		echoOn(fd)
-		os.Exit(-1)
-	case <-brk:
-	}
-}