mirror of
https://github.com/lhns/steam-frame-nix.git
synced 2026-10-06 01:00:13 +02:00
Pierre Kisters
dc527d0253
It is built from source, which makes the first switch long. The template lists it as a commented option; status shows clipboard-sync only while it runs or its autostart link exists.
89 lines
3.4 KiB
Nix
89 lines
3.4 KiB
Nix
# clipboard-sync between the Steam session's X displays and the nested desktop
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# (Xwayland :2). KDE autostart, not systemd: the nested desktop can't reach the
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# user manager, and :2 must exist first. Built from source (upstream flake is
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# x86-only); flake.nix passes the source in.
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{ clipboard-sync-src }:
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{ config, pkgs, lib, ... }:
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let
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cfg = config.steamFrame.clipboardSync;
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in {
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imports = [ ./cleanup.nix ];
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options.steamFrame.clipboardSync = {
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enable = lib.mkOption {
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type = lib.types.bool;
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default = false; # built from source: a long first build
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description = ''
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Run clipboard-sync between the Steam session and the nested desktop
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(KDE autostart; switch stops stale builds and duplicates). Built from
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source.
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'';
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};
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package = lib.mkOption {
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type = lib.types.package;
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default = pkgs.rustPlatform.buildRustPackage {
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pname = "clipboard-sync";
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version = "git";
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src = clipboard-sync-src;
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cargoLock.lockFile = "${clipboard-sync-src}/Cargo.lock";
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nativeBuildInputs = [ pkgs.pkg-config ];
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buildInputs = [ pkgs.libxcb ];
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};
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defaultText = lib.literalMD "built from the `clipboard-sync-src` flake input";
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description = "The clipboard-sync package.";
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};
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};
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config = lib.mkIf cfg.enable {
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home.packages = [ cfg.package ];
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xdg.configFile."autostart/clipboard-sync.desktop".text = ''
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[Desktop Entry]
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Type=Application
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Name=clipboard-sync
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Exec=${cfg.package}/bin/clipboard-sync
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X-KDE-autostart-phase=2
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NoDisplay=true
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'';
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# Keep one instance of the current build, preferably one started in the
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# nested desktop (it inherits the environment; one from a Steam-session
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# terminal has the wrong one). Kill stale builds and duplicates; start a new
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# one only when switching from the nested desktop (else autostart does).
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home.activation.startClipboardSync = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
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want="${cfg.package}/bin/clipboard-sync"
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desktop=() other=()
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for pid in $(${pkgs.procps}/bin/pgrep -x clipboard-sync || true); do
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# clipboard-sync forks workers; only look at top-level instances.
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# Gone since pgrep (e.g. an exited worker): skip it.
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ppid="$(${pkgs.procps}/bin/ps -o ppid= -p "$pid" | tr -d ' ')" || continue
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[ "$(cat "/proc/$ppid/comm" 2>/dev/null)" = clipboard-sync ] && continue
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if [ "$(readlink "/proc/$pid/exe" 2>/dev/null)" != "$want" ]; then
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run kill "$pid" || true # stale build
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elif tr '\0' '\n' < "/proc/$pid/environ" 2>/dev/null | grep -qx 'XDG_CURRENT_DESKTOP=KDE'; then
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desktop+=("$pid")
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else
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other+=("$pid")
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fi
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done
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if [ ''${#desktop[@]} -gt 0 ]; then
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keep=("''${desktop[0]}")
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elif [ "''${XDG_CURRENT_DESKTOP:-}" = KDE ]; then
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keep=()
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else
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keep=("''${other[@]:0:1}")
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fi
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for pid in "''${desktop[@]}" "''${other[@]}"; do
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[[ " ''${keep[*]} " == *" $pid "* ]] || run kill "$pid" || true
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done
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if [ ''${#keep[@]} -eq 0 ]; then
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if [ "''${XDG_CURRENT_DESKTOP:-}" = KDE ]; then
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run ${pkgs.util-linux}/bin/setsid -f "$want" >/dev/null 2>&1
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else
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echo "clipboard-sync: not running; it starts with the nested desktop (autostart)"
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fi
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fi
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'';
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};
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}
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