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Shell wrapper for terminal raw mode, demo no longer sets raw mode

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Added ./demo shell script that sets raw mode via stty before running
the Lisp demo and restores it on exit (including SIGINT/SIGTERM).

demo.lisp no longer attempts to set raw mode from inside SBCL —
terminal raw mode is the shell's responsibility.  This avoids the
recurring problem of sb-ext:run-program + stty not being able to
access the controlling terminal from inside sbcl --script.
This commit is contained in:
Hermes
2026-05-12 01:43:52 +00:00
parent 613e4b6217
commit 2b2119a2f1
2 changed files with 68 additions and 53 deletions
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101
demo.lisp
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@@ -124,60 +124,55 @@
t)))
(defun run-demo ()
(let ((saved (ignore-errors (set-raw-mode))))
(unless saved
(format *error-output* "~&ERROR: Cannot set terminal to raw mode.~%")
(format *error-output* " Make sure you are in a real terminal (not a pipe/redirect).~%")
(format *error-output* " Try: sbcl --script demo.lisp~%")
(return-from run-demo))
"Run the demo. Assumes raw terminal mode is already set by the
shell wrapper (./demo) or by running:
stty raw -echo -isig -icanon min 1 time 0
sbcl --script demo.lisp"
(init-app-state)
(let* ((backend (detect-backend))
(w 80) (h 24))
(declare (ignore h))
(initialize-backend backend)
(unwind-protect
(progn
(init-app-state)
(let* ((backend (detect-backend))
(w 80) (h 24))
(initialize-backend backend)
(unwind-protect
(loop while (getf *app* :running)
do
(backend-clear backend)
;; Title bar
(draw-border backend 2 1 (- w 4) 3 :style :double :title " cl-tty v0.15.0 ")
(draw-text backend 4 2 "arrows/tab: tabs type: test input mouse: test SGR q/esc: quit"
:bright-white nil)
;; Tab bar
(loop for (label . idx) in '((" Home " . 0) (" Widgets " . 1) (" Console " . 2))
for x-pos = 4 then (+ x-pos label-len 2)
for label-len = (length label)
do (let ((active (eql idx (getf *app* :tab))))
(if active
(draw-text backend x-pos 4 label :bright-white :accent :bold t)
(draw-text backend x-pos 4 label :text-muted nil))))
;; Content area
(case (getf *app* :tab)
(0 (render-tab-home backend 4 6 72 20))
(1 (render-tab-widgets backend 4 6 72 24
(getf *app* :input)
(getf *app* :textarea)))
(2 (render-tab-console backend 4 6 72 16)))
;; Mouse cursor indicator
(let ((mx (getf *app* :mouse-x))
(my (getf *app* :mouse-y)))
(when (and (>= mx 0) (>= my 0))
(draw-text backend mx my "@" :bright-cyan nil)))
;; Status bar
(draw-rect backend 2 23 (- w 4) 1 :bg :blue)
(draw-text backend 4 23
(format nil " Tab ~d/3 | ~d events "
(1+ (getf *app* :tab)) (length *log*))
:bright-white :blue :bold t)
(finish-output *standard-output*)
;; Read event — blocks until a key or mouse event arrives
(let ((event (read-event backend)))
(when event
(handle-event event))))
(shutdown-backend backend))))
(when saved
(restore-terminal-state saved)))))
(loop while (getf *app* :running)
do
(backend-clear backend)
;; Title bar
(draw-border backend 2 1 (- w 4) 3 :style :double :title " cl-tty v0.15.0 ")
(draw-text backend 4 2 "arrows/tab: tabs type: test input mouse: test SGR q/esc: quit"
:bright-white nil)
;; Tab bar
(loop for (label . idx) in '((" Home " . 0) (" Widgets " . 1) (" Console " . 2))
for x-pos = 4 then (+ x-pos label-len 2)
for label-len = (length label)
do (let ((active (eql idx (getf *app* :tab))))
(if active
(draw-text backend x-pos 4 label :bright-white :accent :bold t)
(draw-text backend x-pos 4 label :text-muted nil))))
;; Content area
(case (getf *app* :tab)
(0 (render-tab-home backend 4 6 72 20))
(1 (render-tab-widgets backend 4 6 72 24
(getf *app* :input)
(getf *app* :textarea)))
(2 (render-tab-console backend 4 6 72 16)))
;; Mouse cursor indicator
(let ((mx (getf *app* :mouse-x))
(my (getf *app* :mouse-y)))
(when (and (>= mx 0) (>= my 0))
(draw-text backend mx my "@" :bright-cyan nil)))
;; Status bar
(draw-rect backend 2 23 (- w 4) 1 :bg :blue)
(draw-text backend 4 23
(format nil " Tab ~d/3 | ~d events "
(1+ (getf *app* :tab)) (length *log*))
:bright-white :blue :bold t)
(finish-output *standard-output*)
;; Read event — blocks until a key or mouse event arrives
(let ((event (read-event backend)))
(when event
(handle-event event))))
(shutdown-backend backend))))
(run-demo)
(uiop:quit 0)