From 8a7567a8b1fb3eee08ba132b642e645e37cc4ee5 Mon Sep 17 00:00:00 2001
From: Sanchayan Maity <sanchayan@sanchayanmaity.net>
Date: Mon, 4 Apr 2022 14:52:07 +0530
Subject: [PATCH] Start tmux sessions using systemd

While starting the tmux sessions from fish worked some environment
variables were not getting picked up in tmux session.

For example DISPLAY is set after we log in and the graphical sway
session starts but since tmux sessions were started before that it
would be absent from the tmux session. We may be wrong about the
exact order and reasoning for this but atleast that is the observed
behaviour.

Fix this by defining a sway session target and making the tmux session
service dependent on it.
---
 fish/.config/fish/conf.d/setup.fish               | 3 ---
 sway/.config/sway/config                          | 2 ++
 systemd/.config/systemd/user/sway-session.target  | 6 ++++++
 systemd/.config/systemd/user/tmux-session.service | 9 +++++++++
 4 files changed, 17 insertions(+), 3 deletions(-)
 create mode 100644 systemd/.config/systemd/user/sway-session.target
 create mode 100644 systemd/.config/systemd/user/tmux-session.service

diff --git a/fish/.config/fish/conf.d/setup.fish b/fish/.config/fish/conf.d/setup.fish
index c47d655..bc4f786 100644
--- a/fish/.config/fish/conf.d/setup.fish
+++ b/fish/.config/fish/conf.d/setup.fish
@@ -65,9 +65,6 @@ function __fish_setup_on_tty_login --description "Set up environment on tty logi
 
   mkdir -p /tmp/gst-dot
   set -Ux GST_DEBUG_DUMP_DOT_DIR /tmp/gst-dot
-
-  # Start all tmux sessions on login
-  ~/.tmux/session-setup.sh
 end
 
 # Instead of tty check, we would have liked to do this using status is-login
diff --git a/sway/.config/sway/config b/sway/.config/sway/config
index 3125341..8b38725 100644
--- a/sway/.config/sway/config
+++ b/sway/.config/sway/config
@@ -268,3 +268,5 @@ for_window [title="Firefox — Sharing Indicator"] no_focus
 for_window [app_id="gst-launch-1.0"] floating enable, resize set width 1920 px height 1080px
 assign [app_id="gst-launch-1.0"] 4
 assign [title="gst-play-1.0"] 4
+
+exec_always "systemctl --user import-environment; systemctl --user start sway-session.target"
diff --git a/systemd/.config/systemd/user/sway-session.target b/systemd/.config/systemd/user/sway-session.target
new file mode 100644
index 0000000..a6dadf9
--- /dev/null
+++ b/systemd/.config/systemd/user/sway-session.target
@@ -0,0 +1,6 @@
+[Unit]
+Description=Sway compositor session
+Documentation=man:systemd.special
+BindsTo=graphical-session.target
+Wants=graphical-session-pre.target
+After=graphical-session-pre.target
diff --git a/systemd/.config/systemd/user/tmux-session.service b/systemd/.config/systemd/user/tmux-session.service
new file mode 100644
index 0000000..9a5d252
--- /dev/null
+++ b/systemd/.config/systemd/user/tmux-session.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=Start all tmux sessions on login
+
+[Service]
+Type=forking
+ExecStart=%h/.tmux/session-setup.sh
+
+[Install]
+WantedBy=sway-session.target