All eighteen options are now reachable from the menu as a cursor list: arrows
select, Space or Right cycles a value, q goes back, changes are written
immediately. A numbered menu would have run out of digits.
Three real bugs surfaced while building it, each found by testing against an
actual pty rather than a pipe:
- Labels went through printf as format strings, so the percent sign in
"Minimum battery level (%)" was an invalid conversion. cau_msg_in now only
treats a message as a format string when arguments were actually passed -
otherwise any literal % a translator writes is a trap.
- Mixing bash's line-mode read into a single-key interface left the following
read -sn1 receiving nothing at all, reproducibly, so the screen froze after
editing the package list. Replaced with a small line editor built on the same
single-character reader.
- Backspace was being swallowed: in canonical mode DEL is the ERASE character
and the line discipline consumes it, and bash returns to canonical mode
between each read -sn1. The interface now holds non-canonical mode for its
whole lifetime and hands the terminal back only around actions that print or
prompt, with a trap restoring it on Ctrl-C.
Translations and config reads are memoized; the screen redraws every label on
every keypress and a fork per lookup was the reason the redraw was slow enough
to matter.
Felitendo
c308b7e286