fix(linux): move EGL/DMA-BUF workaround into Rust binary

The GitHub Actions workflow was patching the AppImage AppRun script to
set WEBKIT_DISABLE_DMABUF_RENDERER=1, but that approach is fragile:
appimagetool often fails in CI due to missing FUSE, and the env var may
not propagate correctly to the webview process.

Instead, set the variable directly in main.rs before Tauri starts. This
works for AppImage, .deb, and .rpm alike, and users can still override
it at launch with WEBKIT_DISABLE_DMABUF_RENDERER=0.

Also bump version to 0.9.5.

Refs: EGL_BAD_PARAMETER crash on AppImage launch

Author: jesusuzcategui

.github/workflows/release.yml

@@ -112,35 +112,9 @@ jobs:
           prerelease: false
           args: ${{ matrix.args }}
 
-      # Bake `WEBKIT_DISABLE_DMABUF_RENDERER=1` into the AppImage's AppRun
-      # so users on configs that mismatch the runner's EGL stack (NVIDIA
-      # proprietary, Hyprland, some Wayland compositors) don't crash at
-      # launch with `Could not create default EGL display`. The fallback
-      # variable form (`${VAR:-1}`) lets a user reactivate the DMA-BUF
-      # renderer with `WEBKIT_DISABLE_DMABUF_RENDERER=0 ./app.AppImage`
-      # if it works on their machine.
-      #
-      # `tauri-action` already uploaded the original (unpatched) AppImage
-      # to the draft release in the previous step, so this step rebuilds
-      # the AppImage with the patched AppRun and overwrites the release
-      # asset via `gh release upload --clobber`. Net effect: the asset
-      # users download is the patched one.
-      - name: Patch AppImage with EGL workaround
-        if: matrix.platform == 'ubuntu-24.04'
-        shell: bash
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          set -euo pipefail
-          cd src-tauri/target/release/bundle/appimage
-          APPIMAGE=$(ls *.AppImage | head -n 1)
-          ./"$APPIMAGE" --appimage-extract >/dev/null
-          # Insert the env var on line 2 (right after the shebang) so the
-          # webview process inherits it before WebKitGTK initializes.
-          sed -i '2i export WEBKIT_DISABLE_DMABUF_RENDERER=${WEBKIT_DISABLE_DMABUF_RENDERER:-1}' squashfs-root/AppRun
-          wget -q -O appimagetool https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-x86_64.AppImage
-          chmod +x appimagetool
-          ARCH=x86_64 ./appimagetool squashfs-root "$APPIMAGE"
-          rm -rf squashfs-root appimagetool
-          # Overwrite the draft release's AppImage with the patched build.
-          gh release upload "${{ github.ref_name }}" "$APPIMAGE" --clobber --repo "${{ github.repository }}"
+      # The EGL/DMA-BUF workaround now lives in src-tauri/src/main.rs:
+      # `std::env::set_var("WEBKIT_DISABLE_DMABUF_RENDERER", "1")` on Linux
+      # before Tauri starts.  This is more reliable than patching the AppRun
+      # script because it works for .deb / .rpm / AppImage alike and survives
+      # any bundler changes.  Users can still override it at launch:
+      # WEBKIT_DISABLE_DMABUF_RENDERER=0 ./app.AppImage

package.json

@@ -1,7 +1,7 @@
 {
     "name": "courvux-tauri-notepad",
     "private": true,
-    "version": "0.9.4",
+    "version": "0.9.5",
     "description": "Notepad demo app — Courvux + Tauri 2 + Tailwind 4 with build-time precompiled expressions and strict CSP (script-src 'self', no unsafe-eval).",
     "type": "module",
     "scripts": {

src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "courvux-tauri-notepad"
-version = "0.9.4"
+version = "0.9.5"
 edition = "2021"
 authors = ["Vanjex <vanjexdev@gmail.com>"]
 license = "MIT"

src-tauri/src/main.rs

@@ -2,5 +2,17 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
 fn main() {
+    // WebKitGTK 2.44+ (empaquetado desde ubuntu-24.04) activa DMA-BUF/EGL por
+    // defecto, pero el stack gráfico del usuario (NVIDIA propietario, algunos
+    // compositores Wayland, o configuraciones sin aceleración) falla con
+    // "Could not create default EGL display: EGL_BAD_PARAMETER".  Desactivar
+    // el renderer DMA-BUF antes de que WebKit se inicialice evita el crash y
+    // la pantalla en blanco.  El usuario puede reactivarlo con
+    // WEBKIT_DISABLE_DMABUF_RENDERER=0 ./app.AppImage si su stack funciona.
+    #[cfg(target_os = "linux")]
+    if std::env::var("WEBKIT_DISABLE_DMABUF_RENDERER").is_err() {
+        std::env::set_var("WEBKIT_DISABLE_DMABUF_RENDERER", "1");
+    }
+
     courvux_tauri_notepad_lib::run()
 }

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
     "$schema": "https://schema.tauri.app/config/2",
     "productName": "Courvux Notepad",
-    "version": "0.9.4",
+    "version": "0.9.5",
     "identifier": "dev.vanjex.courvux-tauri-notepad",
     "build": {
         "beforeDevCommand": "pnpm dev",