Test FMOD CI export via Github workflow

Author: bitbrain

.github/workflows/test_export.yml

@@ -0,0 +1,62 @@
+name: 🧪 Test Export (Headless)
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    types: [opened, synchronize, reopened]
+  workflow_dispatch:
+
+env:
+  GODOT_VERSION: 4.5
+
+jobs:
+  export-linux-only:
+    name: Export demo (Linux)
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          lfs: true
+          submodules: recursive
+
+      - name: Cache Godot binary
+        id: cache-godot
+        uses: actions/cache@v4
+        with:
+          path: Godot_v${GODOT_VERSION}-stable_linux.x86_64
+          key: godot-${GODOT_VERSION}-linux-x86_64
+
+      - name: Download Godot (Linux)
+        if: steps.cache-godot.outputs.cache-hit != 'true'
+        run: |
+          wget https://github.com/godotengine/godot-builds/releases/download/${GODOT_VERSION}-stable/Godot_v${GODOT_VERSION}-stable_linux.x86_64.zip
+          unzip -q Godot_v${GODOT_VERSION}-stable_linux.x86_64.zip
+          rm Godot_v${GODOT_VERSION}-stable_linux.x86_64.zip
+          chmod +x Godot_v${GODOT_VERSION}-stable_linux.x86_64
+
+      - name: Cache Godot export templates
+        id: cache-templates
+        uses: actions/cache@v4
+        with:
+          path: ~/.local/share/godot/export_templates/${GODOT_VERSION}.stable
+          key: godot-templates-${GODOT_VERSION}
+
+      - name: Download Godot export templates
+        if: steps.cache-templates.outputs.cache-hit != 'true'
+        run: |
+          mkdir -p ~/.local/share/godot/export_templates/
+          wget https://github.com/godotengine/godot-builds/releases/download/${GODOT_VERSION}-stable/Godot_v${GODOT_VERSION}-stable_export_templates.tpz
+          mkdir -p ~/.local/share/godot/export_templates/${GODOT_VERSION}.stable
+          unzip -q Godot_v${GODOT_VERSION}-stable_export_templates.tpz -d ~/.local/share/godot/export_templates/${GODOT_VERSION}.stable
+          rm Godot_v${GODOT_VERSION}-stable_export_templates.tpz
+
+      - name: Export demo (Linux preset)
+        run: |
+          mkdir -p build/linux
+          export EXPORT_DIR=$(readlink -f build/linux)
+          cd demo
+          ../Godot_v${GODOT_VERSION}-stable_linux.x86_64 --headless --verbose --export-release "Linux/X11" "$EXPORT_DIR/demo.x86_64"
+
+