From e66f22976feaed4e0a6ab43bc2b9226be8b0b979 Mon Sep 17 00:00:00 2001
From: dmathieu <42@dmathieu.com>
Date: Thu, 27 Jul 2017 14:23:27 +0200
Subject: [PATCH] remove os-specific IsTerminal methods, and use
 x/crypto/ssh/terminal instead

---
 terminal_appengine.go  | 10 -----
 terminal_notwindows.go | 29 ---------------
 terminal_solaris.go    | 21 -----------
 terminal_windows.go    | 83 ------------------------------------------
 text_formatter.go      | 15 +++++++-
 5 files changed, 14 insertions(+), 144 deletions(-)
 delete mode 100644 terminal_appengine.go
 delete mode 100644 terminal_notwindows.go
 delete mode 100644 terminal_solaris.go
 delete mode 100644 terminal_windows.go

diff --git a/terminal_appengine.go b/terminal_appengine.go
deleted file mode 100644
index e011a8694..000000000
--- a/terminal_appengine.go
+++ /dev/null
@@ -1,10 +0,0 @@
-// +build appengine
-
-package logrus
-
-import "io"
-
-// IsTerminal returns true if stderr's file descriptor is a terminal.
-func IsTerminal(f io.Writer) bool {
-	return true
-}
diff --git a/terminal_notwindows.go b/terminal_notwindows.go
deleted file mode 100644
index 9a4611e7c..000000000
--- a/terminal_notwindows.go
+++ /dev/null
@@ -1,29 +0,0 @@
-// Based on ssh/terminal:
-// Copyright 2011 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.
-
-// +build linux darwin freebsd openbsd netbsd dragonfly nacl
-// +build !appengine
-
-package logrus
-
-import (
-	"io"
-	"os"
-	"unsafe"
-
-	"golang.org/x/sys/unix"
-)
-
-// IsTerminal returns true if stderr's file descriptor is a terminal.
-func IsTerminal(f io.Writer) bool {
-	var termios Termios
-	switch v := f.(type) {
-	case *os.File:
-		_, _, err := unix.Syscall6(unix.SYS_IOCTL, uintptr(v.Fd()), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
-		return err == 0
-	default:
-		return false
-	}
-}
diff --git a/terminal_solaris.go b/terminal_solaris.go
deleted file mode 100644
index 3c86b1abe..000000000
--- a/terminal_solaris.go
+++ /dev/null
@@ -1,21 +0,0 @@
-// +build solaris,!appengine
-
-package logrus
-
-import (
-	"io"
-	"os"
-
-	"golang.org/x/sys/unix"
-)
-
-// IsTerminal returns true if the given file descriptor is a terminal.
-func IsTerminal(f io.Writer) bool {
-	switch v := f.(type) {
-	case *os.File:
-		_, err := unix.IoctlGetTermios(int(v.Fd()), unix.TCGETA)
-		return err == nil
-	default:
-		return false
-	}
-}
diff --git a/terminal_windows.go b/terminal_windows.go
deleted file mode 100644
index db9a8fb51..000000000
--- a/terminal_windows.go
+++ /dev/null
@@ -1,83 +0,0 @@
-// Based on ssh/terminal:
-// Copyright 2011 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.
-
-// +build windows,!appengine
-
-package logrus
-
-import (
-	"bytes"
-	"errors"
-	"io"
-	"os"
-	"os/exec"
-	"strconv"
-	"strings"
-	"unsafe"
-
-	"golang.org/x/sys/windows"
-)
-
-var kernel32 = windows.NewLazyDLL("kernel32.dll")
-
-var (
-	procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
-	procSetConsoleMode = kernel32.NewProc("SetConsoleMode")
-)
-
-const (
-	enableProcessedOutput           = 0x0001
-	enableWrapAtEolOutput           = 0x0002
-	enableVirtualTerminalProcessing = 0x0004
-)
-
-func getVersion() (float64, error) {
-	stdout, stderr := &bytes.Buffer{}, &bytes.Buffer{}
-	cmd := exec.Command("cmd", "ver")
-	cmd.Stdout = stdout
-	cmd.Stderr = stderr
-	err := cmd.Run()
-	if err != nil {
-		return -1, err
-	}
-
-	// The output should be like "Microsoft Windows [Version XX.X.XXXXXX]"
-	version := strings.Replace(stdout.String(), "\n", "", -1)
-	version = strings.Replace(version, "\r\n", "", -1)
-
-	x1 := strings.Index(version, "[Version")
-
-	if x1 == -1 || strings.Index(version, "]") == -1 {
-		return -1, errors.New("Can't determine Windows version")
-	}
-
-	return strconv.ParseFloat(version[x1+9:x1+13], 64)
-}
-
-func init() {
-	ver, err := getVersion()
-	if err != nil {
-		return
-	}
-
-	// Activate Virtual Processing for Windows CMD
-	// Info: https://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
-	if ver >= 10 {
-		handle := windows.Handle(os.Stderr.Fd())
-		procSetConsoleMode.Call(uintptr(handle), enableProcessedOutput|enableWrapAtEolOutput|enableVirtualTerminalProcessing)
-	}
-}
-
-// IsTerminal returns true if stderr's file descriptor is a terminal.
-func IsTerminal(f io.Writer) bool {
-	switch v := f.(type) {
-	case *os.File:
-		var st uint32
-		r, _, e := windows.Syscall(procGetConsoleMode.Addr(), 2, uintptr(v.Fd()), uintptr(unsafe.Pointer(&st)), 0)
-		return r != 0 && e == 0
-	default:
-		return false
-	}
-}
diff --git a/text_formatter.go b/text_formatter.go
index 362fa2872..be412aa94 100644
--- a/text_formatter.go
+++ b/text_formatter.go
@@ -3,10 +3,14 @@ package logrus
 import (
 	"bytes"
 	"fmt"
+	"io"
+	"os"
 	"sort"
 	"strings"
 	"sync"
 	"time"
+
+	"golang.org/x/crypto/ssh/terminal"
 )
 
 const (
@@ -61,7 +65,16 @@ type TextFormatter struct {
 
 func (f *TextFormatter) init(entry *Entry) {
 	if entry.Logger != nil {
-		f.isTerminal = IsTerminal(entry.Logger.Out)
+		f.isTerminal = f.checkIfTerminal(entry.Logger.Out)
+	}
+}
+
+func (f *TextFormatter) checkIfTerminal(w io.Writer) bool {
+	switch v := w.(type) {
+	case *os.File:
+		return terminal.IsTerminal(int(v.Fd()))
+	default:
+		return false
 	}
 }