Moved moved unix-related parts into terminal

internal/terminal/terminal_check_bsd.go

@@ -0,0 +1,13 @@
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package terminal
+
+import "golang.org/x/sys/unix"
+
+const ioctlReadTermios = unix.TIOCGETA
+
+func IsTerminal(fd int) bool {
+	_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
+	return err == nil
+}
+

internal/terminal/terminal_check_unix.go

@@ -0,0 +1,13 @@
+// +build linux aix
+
+package terminal
+
+import "golang.org/x/sys/unix"
+
+const ioctlReadTermios = unix.TCGETS
+
+func IsTerminal(fd int) bool {
+	_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
+	return err == nil
+}
+

terminal_check_aix.go

@@ -1,9 +0,0 @@
-// +build aix
-
-package logrus
-
-import (
-	"golang.org/x/sys/unix"
-)
-
-const ioctlReadTermios = unix.TCGETS

terminal_check_bsd.go

@@ -1,7 +0,0 @@
-// +build darwin dragonfly freebsd netbsd openbsd
-
-package logrus
-
-import "golang.org/x/sys/unix"
-
-const ioctlReadTermios = unix.TIOCGETA

terminal_check_linux.go

@@ -1,7 +0,0 @@
-// +build linux
-
-package logrus
-
-import "golang.org/x/sys/unix"
-
-const ioctlReadTermios = unix.TCGETS

terminal_check_notappengine.go

@@ -6,15 +6,13 @@ import (
 	"io"
 	"os"
 
-	"golang.org/x/sys/unix"
+	"github.com/sirupsen/logrus/internal/terminal"
 )
 
 func checkIfTerminal(w io.Writer) bool {
 	switch v := w.(type) {
 	case *os.File:
-		_, err := unix.IoctlGetTermios(int(v.Fd()), ioctlReadTermios)
-
-		return err == nil
+		return terminal.IsTerminal(int(v.Fd()))
 	default:
 		return false
 	}