use a buffered channel for quitting

app.go

@@ -22,7 +22,7 @@ type App struct {
 func newApp() *App {
 	ui := newUI()
 	nav := newNav(ui.wins[0].h)
-	quit := make(chan bool)
+	quit := make(chan bool, 1)
 
 	return &App{
 		ui:   ui,
@@ -190,8 +190,7 @@ func (app *App) readExpr() chan MultiExpr {
 
 // This is the main event loop of the application. There are two channels to
 // read expressions from client and server. Reading and evaluation are done on
-// different goroutines except for prompting commands (e.g. "read"). Quitting
-// commands should create separate goroutines to prevent deadlock here.
+// different goroutines except for prompting commands (e.g. "read").
 func (app *App) handleInp() {
 	clientChan := app.readExpr()
 

eval.go

@@ -215,7 +215,7 @@ func (e *CallExpr) eval(app *App, args []string) {
 				log.Printf("writing selection file: %s", err)
 			}
 
-			go func() { app.quit <- true }()
+			app.quit <- true
 
 			return
 		}
@@ -224,7 +224,7 @@ func (e *CallExpr) eval(app *App, args []string) {
 			cmd.eval(app, e.args)
 		}
 	case "quit":
-		go func() { app.quit <- true }()
+		app.quit <- true
 	case "bot":
 		app.nav.bot()
 		app.ui.loadFile(app.nav)