Initial implementation.

PKGBUILD

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+# Maintainer redxef <redxef@redxef.at>
+pkgname=sway-dynamic
+pkgver=1.0.0
+pkgrel=1
+pkgdesc="Helper files to dynamically launch sway for NVIDIA comaptibility or not"
+arch=('any')
+url="https://gitea.redxef.at/redxef/sway-dynamic"
+license=('MIT')
+depends=('sway' 'sway-nvidia')
+source=("$pkgname-$pkgver::git+$url.git#tag=$pkgver")
+sha256sums=('SKIP')
+
+package() {
+    cd "$pkgname-$pkgver"
+    install -Dm755 sway-dynamic "$pkgdir/usr/bin/sway-dynamic"
+    install -Dm644 sway-dynamic.desktop "$pkgdir/usr/share/wayland-sessions/sway-dynamic.desktop"
+}

README.md

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 # sway-dynamic
 
-Dynamically switch between sway and sway-nvidia based on active gpu.
+Dynamically switch between sway and sway-nvidia based on active gpu.
+
+## Usage
+
+When booting a GPU set the environment variable `GPUMODE=<driver>` with something
+like `systemd.setenv=GPUMODE=<driver>`. The script will decide how to
+launch sway depending on this variable. Possible values:
+
+- `nvidia`
+- `nouveau`
+
+

sway-dynamic

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+#!/bin/sh
+
+if [ "$GPUMODE" = 'nvidia' ]; then
+    exec sway-nvidia
+else
+    exec sway
+fi

sway-dynamic.desktop

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+[Desktop Entry]
+Name=Sway (Dynamic)
+Comment=An i3-compatible Wayland compositor (NVIDIA Fixes or Standard)
+Exec=sway-dynamic
+Type=Application