Print error message to stderr on unexpected exit

src/tui/light.go

@@ -241,7 +241,7 @@ func (r *LightRenderer) getBytesInternal(buffer []byte) []byte {
 	c, ok := r.getch(false)
 	if !ok {
 		r.Close()
-		errorExit()
+		errorExit("Failed to read /dev/tty")
 	}
 
 	retries := 0

src/tui/ncurses.go

@@ -25,7 +25,6 @@ int c_getcurx(WINDOW* win) {
 import "C"
 
 import (
-	"fmt"
 	"os"
 	"strconv"
 	"strings"
@@ -109,13 +108,11 @@ func (r *FullscreenRenderer) Init() {
 	C.setlocale(C.LC_ALL, C.CString(""))
 	tty := C.c_tty()
 	if tty == nil {
-		fmt.Println("Failed to open /dev/tty")
-		errorExit()
+		errorExit("Failed to open /dev/tty")
 	}
 	_screen = C.c_newterm(tty)
 	if _screen == nil {
-		fmt.Println("Invalid $TERM: " + os.Getenv("TERM"))
-		errorExit()
+		errorExit("Invalid $TERM: " + os.Getenv("TERM"))
 	}
 	C.set_term(_screen)
 	if r.mouse {
@@ -380,7 +377,7 @@ func (r *FullscreenRenderer) GetChar() Event {
 	case C.ERR:
 		// Unexpected error from blocking read
 		r.Close()
-		errorExit()
+		errorExit("Failed to read /dev/tty")
 	case C.KEY_UP:
 		return Event{Up, 0, nil}
 	case C.KEY_DOWN:

src/tui/tcell.go

@@ -6,9 +6,6 @@ import (
 	"time"
 	"unicode/utf8"
 
-	"fmt"
-	"os"
-
 	"runtime"
 
 	// https://github.com/gdamore/tcell/pull/135
@@ -123,12 +120,10 @@ var (
 func (r *FullscreenRenderer) initScreen() {
 	s, e := tcell.NewScreen()
 	if e != nil {
-		fmt.Fprintf(os.Stderr, "%v\n", e)
-		errorExit()
+		errorExit(e.Error())
 	}
 	if e = s.Init(); e != nil {
-		fmt.Fprintf(os.Stderr, "%v\n", e)
-		errorExit()
+		errorExit(e.Error())
 	}
 	if r.mouse {
 		s.EnableMouse()

src/tui/tui.go

@@ -1,6 +1,7 @@
 package tui
 
 import (
+	"fmt"
 	"os"
 	"strconv"
 	"time"
@@ -284,7 +285,8 @@ func EmptyTheme() *ColorTheme {
 		Border:       colUndefined}
 }
 
-func errorExit() {
+func errorExit(message string) {
+	fmt.Fprintln(os.Stderr, message)
 	os.Exit(2)
 }