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feat(menu): Back on every submenu + working snapshot fallback

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Two menu improvements.

Back everywhere: every list menu now ends with a "↩ Back" entry that
returns one level up — power, theme, power-profile, clipboard, files,
capture, not just Tools/System — so you no longer have to Esc out and
reopen to back up. A `back` helper + a shared `BACK` label keep it uniform;
matched exactly so it can't collide with clipboard/filename content. Esc
still quits instantly.

Snapshot fallback: btrfs-assistant 2.2 segfaults on 26.05 (libbtrfsutil
ABI), so `nomarchy-menu snapshot` now launches nomarchy-snapshots instead —
a keyboard-driven snapper browser/restore. snapper is root-only here and
rofi can't run as root under Wayland, so it runs in a terminal via sudo
(one password prompt) and uses fzf to pick: browse/diff (read-only),
restore files (undochange), or roll back (root config only), each behind a
typed-`yes` confirmation — safer than a one-click rofi rollback.
btrfs-assistant stays installed for when nixpkgs fixes it.

Verified: flake check clean; home generation builds and the menu passes
bash -n with all Back + snapshot wiring; nomarchy-snapshots passes
shellcheck (writeShellApplication) in a snapper-enabled system build.
Pending an on-machine check of the restore/rollback paths.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Bernardo Magri
2026-06-19 19:54:42 +01:00
parent a6d6860054
commit 0e42763aea
3 changed files with 115 additions and 25 deletions
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52
modules/home/rofi.nix
View File

@@ -64,6 +64,14 @@ let
# rofi has show-icons (on globally; passed explicitly on the icon menus).
row() { printf '%s\0icon\x1f%s\n' "$1" "$2"; }
# General menu convention: every list menu ends with a "↩ Back" entry that
# returns one level up (so you never have to Esc out and reopen). `back`
# emits it with an icon; plain pick-lists append the bare label instead.
# Always matched EXACTLY ("↩ Back") so it can't collide with clipboard or
# filename content. The arrow + go-previous icon read as "go back".
BACK="↩ Back"
back() { row "$BACK" go-previous; }
case "''${1:-}" in
power)
choice=$( {
@@ -73,8 +81,10 @@ let
row "Hibernate" system-hibernate
row "Reboot" system-reboot
row "Shutdown" system-shutdown
back
} | rofi -dmenu -show-icons -p Power) || exit 0
case "$choice" in
"$BACK") exec "$0" ;;
*Lock) loginctl lock-session ;;
*Logout) hyprctl dispatch exit ;;
*Suspend) systemctl suspend ;;
@@ -92,17 +102,19 @@ let
exit 0
fi
cur=$(powerprofilesctl get 2>/dev/null)
choice=$(powerprofilesctl list 2>/dev/null \
| sed -nE 's/^[* ] ([a-z-]+):$/\1/p' \
choice=$( { powerprofilesctl list 2>/dev/null | sed -nE 's/^[* ] ([a-z-]+):$/\1/p'; printf '%s\n' "$BACK"; } \
| rofi -dmenu -p "profile (now: $cur)") || exit 0
[ "$choice" = "$BACK" ] && exec "$0" system
[ -n "$choice" ] && powerprofilesctl set "$choice" ;;
theme)
choice=$(nomarchy-theme-sync list | rofi -dmenu -p theme) || exit 0
choice=$( { nomarchy-theme-sync list; printf '%s\n' "$BACK"; } | rofi -dmenu -p theme) || exit 0
[ "$choice" = "$BACK" ] && exec "$0"
[ -n "$choice" ] && exec nomarchy-theme-sync apply "$choice" ;;
clipboard)
sel=$(cliphist list | rofi -dmenu -p clip) || exit 0
sel=$( { cliphist list; printf '%s\n' "$BACK"; } | rofi -dmenu -p clip) || exit 0
[ "$sel" = "$BACK" ] && exec "$0" tools
printf '%s' "$sel" | cliphist decode | wl-copy ;;
calc)
@@ -114,10 +126,10 @@ let
-calc-command "echo -n '{result}' | wl-copy" ;;
files)
sel=$(fd . "$HOME" --type f --hidden --exclude .git --exclude .cache 2>/dev/null \
| head -n 50000 \
| sed "s|^$HOME/||" \
sel=$( { fd . "$HOME" --type f --hidden --exclude .git --exclude .cache 2>/dev/null \
| head -n 50000 | sed "s|^$HOME/||"; printf '%s\n' "$BACK"; } \
| rofi -dmenu -p file) || exit 0
[ "$sel" = "$BACK" ] && exec "$0" tools
[ -n "$sel" ] && exec xdg-open "$HOME/$sel" ;;
emoji)
@@ -145,10 +157,12 @@ let
row "Region → file" applets-screenshooter
row "Full screen → clipboard" camera-photo
row "Full screen → file" camera-photo
back
} | rofi -dmenu -show-icons -p Capture) || exit 0
dir="$HOME/Pictures/Screenshots"
file="$dir/$(date +%Y%m%d-%H%M%S).png"
case "$choice" in
"$BACK") exec "$0" tools ;;
*"Region → clipboard"*) grim -g "$(slurp)" - | wl-copy ;;
*"Region → file"*) mkdir -p "$dir"; grim -g "$(slurp)" "$file" \
&& notify-send "Screenshot saved" "$file" ;;
@@ -187,12 +201,14 @@ let
notify-send "Night light" "Not available (nomarchy.nightlight off?)."; exit 0 ;;
snapshot)
# btrfs-assistant: snapshot browse / diff / restore / rollback over
# snapper, elevating via polkit. Shipped system-side with
# nomarchy.system.snapper; self-gate so the entry no-ops elsewhere.
command -v btrfs-assistant >/dev/null 2>&1 \
|| { notify-send "Snapshots" "btrfs-assistant isn't installed (BTRFS snapshots off?)."; exit 0; }
exec btrfs-assistant ;;
# btrfs-assistant 2.2 segfaults on 26.05 (libbtrfsutil ABI), so launch
# the keyboard-driven snapper browser instead: a terminal running it
# via sudo (snapper is root-only here — one password prompt), with
# browse/diff, restore (undochange) and rollback, each confirmed.
# Self-gated to nomarchy.system.snapper, so it no-ops elsewhere.
command -v nomarchy-snapshots >/dev/null 2>&1 \
|| { notify-send "Snapshots" "Snapshot tools unavailable (nomarchy.system.snapper off?)."; exit 0; }
exec ${cfg.terminal} -e sudo nomarchy-snapshots ;;
tools)
# Tools submenu — utilities you invoke. Each leaf is also reachable
@@ -205,9 +221,10 @@ let
row "Web search" system-search
row "Capture" applets-screenshooter
row "Ask Claude" internet-chat
row "Back" go-previous
back
} | rofi -dmenu -show-icons -p Tools) || exit 0
case "$choice" in
"$BACK") exec "$0" ;;
*Calc*) exec "$0" calc ;;
*Clipboard*) exec "$0" clipboard ;;
*Emoji*) exec "$0" emoji ;;
@@ -215,7 +232,6 @@ let
*Web*) exec "$0" web ;;
*Capture*) exec "$0" capture ;;
*Ask*) exec "$0" ask ;;
*Back*) exec "$0" ;;
esac ;;
system)
@@ -229,20 +245,20 @@ let
row "Do Not Disturb" notification-disabled
systemctl --user cat hyprsunset.service >/dev/null 2>&1 \
&& row "Night light" weather-clear-night
command -v btrfs-assistant >/dev/null 2>&1 && row "Snapshots" timeshift
command -v nomarchy-snapshots >/dev/null 2>&1 && row "Snapshots" timeshift
if [ -e "''${bats[0]}" ] && command -v powerprofilesctl >/dev/null 2>&1; then
row "Power profile" preferences-system-power
fi
row "Back" go-previous
back
} | rofi -dmenu -show-icons -p System) || exit 0
case "$choice" in
"$BACK") exec "$0" ;;
*Network*) exec "$0" network ;;
*Bluetooth*) exec "$0" bluetooth ;;
*"Do Not Disturb"*) exec "$0" dnd ;;
*"Night light"*) exec "$0" nightlight ;;
*Snapshots*) exec "$0" snapshot ;;
*"Power profile"*) exec "$0" power-profile ;;
*Back*) exec "$0" ;;
esac ;;
"")

65
modules/nixos/default.nix
View File

@@ -325,8 +325,69 @@ in
nixos-rebuild switch --flake /etc/nixos#default "$@"
'')
# The desktop snapshot manager (browse / diff / restore / rollback over
# snapper, elevating via polkit) — what `nomarchy-menu snapshot` launches.
++ lib.optional cfg.snapper.enable pkgs.btrfs-assistant;
# snapper, elevating via polkit). Kept for when nixpkgs fixes its crash.
++ lib.optional cfg.snapper.enable pkgs.btrfs-assistant
# Keyboard-driven snapper browser/restore — the fallback `nomarchy-menu
# snapshot` actually launches while btrfs-assistant 2.2 segfaults on 26.05
# (libbtrfsutil ABI). Runs as root (snapper is root-only here; the menu
# opens it in a terminal via sudo, one password prompt), fzf to pick, with
# browse/diff (read-only) and typed-`yes` confirmation before any write.
++ lib.optional cfg.snapper.enable (pkgs.writeShellApplication {
name = "nomarchy-snapshots";
runtimeInputs = with pkgs; [ snapper fzf gawk gnugrep less coreutils systemd ];
text = ''
if [ "$(id -u)" -ne 0 ]; then
echo "nomarchy-snapshots must run as root (snapper needs it) — use sudo." >&2
exit 1
fi
mapfile -t configs < <(snapper list-configs | awk 'NR>2 {print $1}' | grep .)
if [ "''${#configs[@]}" -eq 0 ]; then
echo "No snapper configs found." >&2; exit 1
elif [ "''${#configs[@]}" -eq 1 ]; then
config="''${configs[0]}"
else
config=$(printf '%s\n' "''${configs[@]}" | fzf --prompt="snapper config> ") || exit 0
fi
while :; do
snap=$(snapper -c "$config" list \
| fzf --header-lines=2 --prompt="[$config] pick a snapshot (Esc quits)> ") || exit 0
num=$(awk '{print $1}' <<<"$snap")
case "$num" in ""|*[!0-9]*) continue ;; esac
action=$(printf '%s\n' \
"Browse changes since #$num (read-only)" \
"Restore changed files to #$num (undochange)" \
"Roll the system back to #$num (reboot)" \
"↩ Back to the snapshot list" \
| fzf --prompt="snapshot #$num> ") || exit 0
case "$action" in
Browse*)
snapper -c "$config" status "$num..0" | less -R || true ;;
Restore*)
read -rp "Revert files in '$config' to snapshot #$num? Type yes to confirm: " ans || continue
if [ "$ans" = yes ]; then
snapper -c "$config" undochange "$num..0"
echo "Files restored. Press enter."; read -r _ || true
fi ;;
Roll*)
if [ "$config" != root ]; then
echo "Rollback applies to the 'root' config only; use Restore for '$config'. Press enter."
read -r _ || true
else
read -rp "Roll the SYSTEM back to #$num and REBOOT now? Type yes to confirm: " ans || continue
if [ "$ans" = yes ]; then
snapper -c root rollback "$num"
echo "Rolled back — rebooting…"; systemctl reboot
fi
fi ;;
*) continue ;;
esac
done
'';
});
# Don't let boot entries fill the ESP over the years.
boot.loader.systemd-boot.configurationLimit = lib.mkDefault 10;