Surprisingly complicated to get back to normal TTY without dropping t…

…he terminal…

Problem is that undoing the RAW mode is not possible with the current
implementation. We can't just force it off it seems.

src/interactive/app/eventloop.rs

@@ -9,9 +9,7 @@ use dua::{
 };
 use failure::Error;
 use std::{collections::BTreeMap, io, io::Write, path::PathBuf};
-use termion::event::Key;
-use termion::input::TermRead;
-use termion::screen::ToMainScreen;
+use termion::{event::Key, input::TermRead, raw::IntoRawMode, screen::ToMainScreen};
 use tui::backend::Backend;
 use tui_react::Terminal;
 
@@ -72,8 +70,14 @@ impl AppState {
         use termion::event::Key::*;
         use FocussedPane::*;
 
-        fn exit_now() -> ! {
+        fn exit_now<B: Backend>(terminal: &mut Terminal<B>) -> ! {
+            terminal.show_cursor().ok();
             write!(io::stdout(), "{}", ToMainScreen).ok();
+            io::stdout()
+                .into_raw_mode()
+                .expect("TTY")
+                .suspend_raw_mode()
+                .ok();
             io::stdout().flush().ok();
             // Exit 'quickly' to avoid having to wait for all memory to be freed by us.
             // Let the OS do it - we have nothing to lose, literally.
@@ -88,9 +92,9 @@ impl AppState {
                 Char('\t') => {
                     self.cycle_focus(window);
                 }
-                Ctrl('c') => exit_now(),
+                Ctrl('c') => exit_now(terminal),
                 Char('q') | Esc => match self.focussed {
-                    Main => exit_now(),
+                    Main => exit_now(terminal),
                     Mark => self.focussed = Main,
                     Help => {
                         self.focussed = Main;