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feat(menu): System › Rollback — desktop generations picker (item 9b, item 9 done)
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Undo is one menu away: the new rollback flow lists the last ten Home
Manager generations (the theme/config history is already generations,
newest marked current) and activates the picked one in a terminal —
HM's supported rollback, reversible by re-picking a newer one, so no
typed-yes gate. System-level undo deliberately links out rather than
reimplementing destructive flows in rofi: the Snapshots row opens the
existing gated flow, and 'boot an older generation (how)' fires an
instruction notification pointing at docs/RECOVERY.md §3 (which now
cross-references the menu path).

V1: template-home built, generated menu bash -n clean, row rendering
and pick-parsing verified against fixture generations output. V3
exercise queued.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Bernardo Magri
2026-07-04 20:24:37 +01:00
parent 3f5e414341
commit 1b8eccbdca
5 changed files with 70 additions and 12 deletions
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42
modules/home/rofi.nix
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@@ -434,6 +434,46 @@ ${themeRows}
|| { notify-send "Snapshots" "Snapshot tools unavailable (nomarchy.system.snapper off?)."; exit 0; }
exec ${cfg.terminal} -e sudo nomarchy-snapshots ;;
rollback)
# Undo, one menu away (informative + rock-stable). Desktop =
# Home Manager generations: theme/config history is already one
# generation per change, and running an older generation's
# activate script is the supported HM rollback — reversible by
# activating a newer one again, so no typed-yes gate here.
# System-level undo deliberately LINKS OUT instead of putting
# destructive flows in rofi: boot-menu generations and snapper
# rollback have their own homes and gates (docs/RECOVERY.md,
# nomarchy-snapshots).
gens=$(home-manager generations 2>/dev/null | head -10)
choice=$( {
if [ -n "$gens" ]; then
printf '%s\n' "$gens" | awk '{
printf "Desktop gen %s — %s %s%s\n", $5, $1, $2, (NR==1 ? " (current)" : "")
}' | while IFS= read -r line; do row "$line" document-open-recent; done
fi
command -v nomarchy-snapshots >/dev/null 2>&1 \
&& row "System files → Snapshots" timeshift
row "System config → boot an older generation (how)" help-about
back
} | rofi -dmenu -show-icons -p Rollback) || exit 0
case "$choice" in
"$BACK") exec "$0" system ;;
"Desktop gen "*)
num=''${choice#Desktop gen }; num=''${num%% *}
path=$(printf '%s\n' "$gens" | awk -v n="$num" '$5 == n { print $7 }')
[ -x "$path/activate" ] \
|| { notify-send "Rollback" "Generation $num not found on disk."; exit 1; }
exec ${cfg.terminal} -e sh -c "
echo \"Activating Home Manager generation $num…\"; echo
\"$path/activate\"
echo; echo \"Desktop rolled back to generation $num.\"
echo \"(Roll forward the same way — newer generations stay listed.)\"
printf 'Enter to close.'; read -r _" ;;
*Snapshots*) exec "$0" snapshot ;;
*"older generation"*)
notify-send "System rollback" "Reboot and pick an older NixOS generation in the boot menu (the last 10 are kept). Make it stick: revert the change in ~/.nomarchy, then sys-rebuild. Details: docs/RECOVERY.md §3." ;;
esac ;;
tools)
# Tools submenu — utilities you invoke. Each leaf is also reachable
# directly (SUPER+CTRL+<mnemonic>); this just keeps the root short.
@@ -487,6 +527,7 @@ ${themeRows}
fi
fi
command -v nomarchy-snapshots >/dev/null 2>&1 && row "Snapshots" timeshift
row "Rollback" edit-undo
if [ -e "''${bats[0]}" ] && command -v powerprofilesctl >/dev/null 2>&1; then
row "Power profile" preferences-system-power
fi
@@ -505,6 +546,7 @@ ${themeRows}
*"Auto timezone"*) exec "$0" autotimezone ;;
*"Auto-commit"*) exec "$0" autocommit ;;
*Snapshots*) exec "$0" snapshot ;;
*Rollback*) exec "$0" rollback ;;
*"Power profile"*) exec "$0" power-profile ;;
esac ;;