vendor: add github.com/sirupsen/logrus

vendor/github.com/sirupsen/logrus/terminal_check_windows.go

@@ -0,0 +1,34 @@
+// +build !appengine,!js,windows
+
+package logrus
+
+import (
+	"io"
+	"os"
+	"syscall"
+
+	sequences "github.com/konsorten/go-windows-terminal-sequences"
+)
+
+func initTerminal(w io.Writer) {
+	switch v := w.(type) {
+	case *os.File:
+		sequences.EnableVirtualTerminalProcessing(syscall.Handle(v.Fd()), true)
+	}
+}
+
+func checkIfTerminal(w io.Writer) bool {
+	var ret bool
+	switch v := w.(type) {
+	case *os.File:
+		var mode uint32
+		err := syscall.GetConsoleMode(syscall.Handle(v.Fd()), &mode)
+		ret = (err == nil)
+	default:
+		ret = false
+	}
+	if ret {
+		initTerminal(w)
+	}
+	return ret
+}