Sway. Загрузка

Загрузка сессии Sway.

1 Дисплей-менеджеры

2 Загрузка переменных среды перед сессией

• Для работоспособности Sway необходимо часть переменных загрузить перед сессией (см. Sway. Совместимость приложений).

2.1 Скрипт загрузки Sway

• Можно использовать наработки Fedora.
• Репозиторий: https://gitlab.com/fedora/sigs/sway/sway-config-fedora
• Для запуска используется скрипт /usr/bin/start-sway:

   1#!/bin/sh
   2
   3## Internal variables
   4readonly _SWAY_COMMAND="/usr/bin/sway"
   5SWAY_EXTRA_ARGS=""
   6
   7## General exports
   8export XDG_CURRENT_DESKTOP=sway
   9export XDG_SESSION_DESKTOP=sway
  10export XDG_SESSION_TYPE=wayland
  11
  12## Hardware compatibility
  13# We can't be sure that the virtual GPU is compatible with Sway.
  14# We should be attempting to detect an EGL driver instead, but that appears
  15# to be a bit more complicated.
  16case $(systemd-detect-virt --vm) in
  17    "none"|"")
  18        ;;
  19    "kvm")
  20        # There's two drivers we can get here, depending on the 3D acceleration
  21        # flag state: either virtio_gpu/virgl or kms_swrast/llvmpipe.
  22        #
  23        # The former one causes graphical glitches in OpenGL apps when using
  24        # 'pixman' renderer. The latter will crash 'gles2' renderer outright.
  25        # Neither of those support 'vulkan'.
  26        #
  27        # The choice is obvious, at least until we learn to detect the driver
  28        # instead of abusing the virtualization technology identifier.
  29        #
  30        # See also: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/2871
  31        export WLR_RENDERER=pixman
  32        # 'pixman' on virtio_gpu with recent kernels is glitchy. Appears that
  33        # it only affects atomic KMS, and legacy interface works.
  34        export WLR_DRM_NO_ATOMIC=1
  35        # WLR_NO_HARDWARE_CURSORS=1 is not needed with legacy DRM interface
  36        ;;
  37    *)
  38        # https://github.com/swaywm/sway/issues/6581
  39        export WLR_NO_HARDWARE_CURSORS=1
  40        ;;
  41esac
  42
  43## Apply `environment.d(5)` customizations
  44# This can be used to share the custom environment configs with systemd --user.
  45# Importing `systemd --user show-environment` here may have unexpected
  46# consequences, such as getting a leftover `WAYLAND_DISPLAY` or `DISPLAY`
  47# and breaking Sway startup. Thus, the direct call to a systemd generator.
  48set -o allexport
  49eval "$(/usr/lib/systemd/user-environment-generators/30-systemd-environment-d-generator)"
  50set +o allexport
  51
  52## Load Sway-specific system environment customizations
  53if [ -f /etc/sway/environment ]; then
  54    set -o allexport
  55    # shellcheck source=/dev/null
  56    . /etc/sway/environment
  57    set +o allexport
  58fi
  59
  60## Load Sway-specific user environment customizations
  61if [ -f "${XDG_CONFIG_HOME:-$HOME/.config}/sway/environment" ]; then
  62    set -o allexport
  63    # shellcheck source=/dev/null
  64    . "${XDG_CONFIG_HOME:-$HOME/.config}/sway/environment"
  65    set +o allexport
  66fi
  67
  68## Unexport internal variables
  69# export -n is not POSIX :(
  70_SWAY_EXTRA_ARGS="$SWAY_EXTRA_ARGS"
  71unset SWAY_EXTRA_ARGS
  72
  73## Log all exported WLR_ variables
  74if _WLR_VARS=$(env | grep '^WLR_'); then
  75    printf 'environment variables for wlroots: %s' "$_WLR_VARS" |
  76        tr '\n' ' ' |
  77        systemd-cat -p notice -t "${_SWAY_COMMAND##*/}"
  78fi
  79
  80# Start sway with extra arguments and send output to the journal
  81# shellcheck disable=SC2086 # quoted expansion of EXTRA_ARGS can produce empty field
  82exec systemd-cat -- $_SWAY_COMMAND $_SWAY_EXTRA_ARGS "$@"
  

• Этот скрипт читает переменные для сессии Sway из файлов:
  • /etc/sway/environment;
  • ${XDG_CONFIG_HOME}/sway/environment (~/.config/sway/environment).
• Для запуска этого файла из стандартный дисплей-менеджеров нужно поправить файл /usr/share/wayland-sessions/sway.desktop:

  1[Desktop Entry]
  2Name=Sway
  3Comment=An i3-compatible Wayland compositor
  4Exec=start-sway
  5Type=Application
  6DesktopNames=sway
  

• Эти патчи добавлены в оверлей karma (см. Gentoo. Дополнительные репозитории).

2.2 Локальные переменные среды для Sway

• Файл с заданными локальными переменными находится в ~/.config/sway/environment:

   1# -*- mode: shell -*-
   2# vim: set ft=sh:
   3# This file will be sourced from /usr/bin/start-sway script.
   4# User-specific variables should be placed in $XDG_CONFIG_HOME/sway/environment
   5
   6## Pass extra arguments to the /usr/bin/sway executable
   7
   8#SWAY_EXTRA_ARGS="$SWAY_EXTRA_ARGS --unsupported-gpu"
   9#SWAY_EXTRA_ARGS="$SWAY_EXTRA_ARGS --debug"
  10
  11## Set environment variables
  12
  13# Useful variables for wlroots:
  14# https://gitlab.freedesktop.org/wlroots/wlroots/-/blob/master/docs/env_vars.md
  15#
  16#WLR_NO_HARDWARE_CURSORS=1
  

• Исправления для Java (см. Sway. Совместимость приложений):

  1
  2## Java compatibility
  3_JAVA_AWT_WM_NONREPARENTING=1
  

• Исправления для Qt (см. Sway. Совместимость приложений):

  1
  2## Qt tuning
  3# QT_QPA_PLATFORM=wayland
  4QT_QPA_PLATFORM=xcb
  5QT_QPA_PLATFORMTHEME=qt6ct
  6QT_WAYLAND_DISABLE_WINDOWDECORATION=1
  7QT_WAYLAND_FORCE_DPI=physical