config-settings is now a launcher for scripts/config-settings-tui.py,
drawn with Python's stdlib curses. The seven fish files that hand-rolled
the ANSI renderer are gone, along with the golden harness that had to pin
their byte-exact output.
The TUI is a child process, so it can neither read the session's global
variables nor write them. State goes in as a dump from the new
__config_settings_state; the edits come back as a fish script that
config-settings sources, which is what lets the Session page's `set -g`
land in the caller's shell instead of in a child that is about to exit.
Every edit is emitted as a call to __config_settings_apply or
__config_settings_set_value, so list splitting, the SCROLLBACK_HISTORY_*
export mirror and the shadow-warning suppression all stay in the fish
layer that already owned them.
The consequence, and the one behaviour change: edits are applied in one
batch on exit rather than on each keypress. The status bar shows a
pending count.
New: `/` filters the current page, and on the Universal and Session pages
it reaches into every category's sub-categories, listing hits as
"Category › Sub" so a sub-category can be toggled without drilling into
its parent first. Also a `?` help overlay, mouse selection, and a
drill-down page that leads with the category's own toggle.
Gone with the renderer: the four width tiers, the wrap-aware erase
arithmetic, the stty/dd/od raw key reader, the panel-height bookkeeping
and the hand-written redraw differ. curses owns all of it, and the alt
screen plus absolute addressing makes the desync class behind 608b022,
4210f3b, 93fc5e0 and 3c4f720 unreachable.
The sub-category taxonomy is NOT duplicated in Python: it travels in the
state dump, still sourced from __config_settings_subcats. The category,
Sponge and Paths row tables move into Python, consolidating the two
copies the fish renderers kept.
Dependency: python3 with curses. Stdlib on Arch, Fedora and a full
Debian/Ubuntu python3; python3-minimal alone lacks _curses. The launcher
checks for both and names what is missing. Called out in the README.
Verified: 416/416 assertions, plus a live end-to-end in a sandbox HOME
confirming the Universal page writes universal scope only (U1/G0) and the
Session page global scope only (U0/G1).
Add scripts/config-settings-tui.py, a stdlib-curses prototype of the
config-settings interface, plus a gate that runs its --self-test.
The backend is stubbed: values live in an in-memory dict and nothing is
read from or written to fish variables. This is here to evaluate the
render engine and the interaction model before committing to a rewrite.
Why curses rather than more ANSI arithmetic:
- No flicker, structurally. curses diffs its virtual screen against the
physical one and emits only the changed cells, which is what
__config_settings_diff_redraw.fish reimplements by hand.
- Alternate screen plus absolute addressing. Stray output cannot desync
the display, so the bug class behind 608b022 (fish's read prompt),
4210f3b (a shadow warning on stderr), 93fc5e0 and 3c4f720 (line wrap
breaking the erase height) cannot occur at all.
- Resize is a repaint rather than wrap-factor arithmetic.
- Overlays, panes, live filtering and mouse input cost a few lines each.
The layout departs from the current single panel: a page sidebar with a
live filter on the left, a scrolling detail pane on the right, a help
overlay on '?', and mouse selection. Sub-category drill-down, the
tri-state badges and the Sponge/Paths value rows all carry over.
Dependency note: python3 with the curses module. That is stdlib on Arch,
Fedora and a full Debian/Ubuntu python3; python3-minimal alone does not
carry _curses, so the test asserts the import.
The prototype is not wired into config-settings and nothing existing
changed.
rootiest