112 lines
4.4 KiB
Nix
112 lines
4.4 KiB
Nix
{ pkgs
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, inputs
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, system
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, lib
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, ...
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}:
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let
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quickshell_bar = inputs.quickshell_bar.packages.${system}.default;
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att_wm = inputs.att_wm.packages.${system}.default;
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cliphist_river = pkgs.writeShellScriptBin "cliphist_river" ''
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${lib.getExe pkgs.cliphist} list | \
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${lib.getExe pkgs.wofi} --dmenu --insensitive | \
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${lib.getExe pkgs.cliphist} decode | \
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${pkgs.wl-clipboard}/bin/wl-copy
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'';
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screenshot_clip = pkgs.writeShellScriptBin "screenshot_clip" ''
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GEOM="$(${lib.getExe pkgs.slurp} -d)"
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${lib.getExe pkgs.grim} -g "$GEOM" - | ${pkgs.wl-clipboard}/bin/wl-copy
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'';
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in
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{
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# att_wm is configured at compile time, dwm-style — there is no config file to
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# generate here, and the bindings live in its own src/config.zig (Alt as mod,
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# nine tags, master/monocle/tabbed). To override them without forking, build
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# with a replacement config:
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# inputs.att_wm.packages.${system}.default.override { configFile = ./config.zig; }
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#
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# It spawns `foot` and `wmenu-run` by bare name, so both have to be on PATH;
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# cliphist_river and screenshot_clip are here for a future config.zig to spawn
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# the same way. The package also carries att_wmctl, the CLI that drives the
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# window manager over its IPC socket.
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home.packages = [
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att_wm
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pkgs.wmenu
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cliphist_river
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screenshot_clip
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];
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# river runs $XDG_CONFIG_HOME/river/init at startup if it is executable, and
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# that is the whole of river's configuration surface — it implements no
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# window management itself, that is att_wm over river-window-management-v1.
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xdg.configFile."river/init" = {
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executable = true;
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text = ''
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#!${pkgs.runtimeShell}
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# greetd discards the session's stdio, and river/att_wm log to stderr only
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# — without this a failing window manager is a silent blank screen.
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log="''${XDG_STATE_HOME:-$HOME/.local/state}/river.log"
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mkdir -p "$(dirname "$log")"
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exec >>"$log" 2>&1
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echo "=== river init $(date -Is) ==="
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# river's session file sets no DesktopNames, so the portal backend
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# (xdg.portal.config.river in fuji/configuration.nix) needs this.
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export XDG_CURRENT_DESKTOP=river
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export XDG_SESSION_TYPE=wayland
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# Hand the session env to systemd/D-Bus, then bring up the target the
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# user services hang off — same dance the home-manager sway module does.
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${pkgs.dbus}/bin/dbus-update-activation-environment --systemd \
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DISPLAY WAYLAND_DISPLAY XDG_CURRENT_DESKTOP XDG_SESSION_TYPE \
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NIXOS_OZONE_WL XCURSOR_THEME XCURSOR_SIZE
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systemctl --user reset-failed
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systemctl --user start river-session.target
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# The bar (same one sway and hyprland use) picks its backend from the
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# environment alone: with no $HYPRLAND_INSTANCE_SIGNATURE and no
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# $SWAYSOCK/$I3SOCK it falls through to att_wm, so nothing needs setting
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# here. It retries the connection every second, which is why starting it
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# before att_wm is fine — and why it must start after river exported
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# WAYLAND_DISPLAY, since that name is part of the socket path. Both sides
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# derive $XDG_RUNTIME_DIR/att_wm-$WAYLAND_DISPLAY.sock independently, so
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# nothing here has to agree on it.
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${quickshell_bar}/bin/quickshell-bar &
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bar=$!
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# att_wm comes from the flake input (git.project-cloud.net/asmir/att_wm),
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# so the session runs exactly the revision flake.lock pins. Iterating on
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# it now means `nix flake update att_wm` + rebuild; to test a working tree
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# without that, run it under a nested river via the repo's run-nested.sh.
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#
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# Not exec'd: when att_wm exits we still want to tear the target down.
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# att_wm's Alt+Ctrl+Shift+q (exit_session) ends river itself.
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echo "starting ${lib.getExe att_wm}"
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${lib.getExe att_wm}
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echo "=== att_wm exited with $? at $(date -Is) ==="
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# The bar is a child of this script rather than of att_wm, so it outlives
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# it: reap it here so an att_wm exit doesn't leave a bar floating over a
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# session with no window manager.
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kill "$bar" 2>/dev/null || true
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systemctl --user stop river-session.target
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'';
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};
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systemd.user.targets.river-session = {
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Unit = {
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Description = "river compositor session";
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Documentation = [ "man:systemd.special(7)" ];
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BindsTo = [ "graphical-session.target" ];
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Wants = [ "graphical-session-pre.target" ];
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After = [ "graphical-session-pre.target" ];
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};
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};
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}
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