linux: Update Godot Engine and Flatpak versions (#46)

* workflows: bump Flatpak image and action versions

* workflows: Update Godot Engine to 3.6.2; download manually

* workflows: correct Godot project path

* workflows: run Godot from repo root for export

Godot needs to run from the directory containing export_presets.cfg.
Running from the export/ subdirectory caused Godot to fail to find
export_presets.cfg even when --path pointed to the repo root. Running
from the repo root with export/godot and --path=. fixes this; the ._sc_
self-contained marker is still placed next to the binary in export/.

.github/workflows/flatpak.yml

@@ -13,11 +13,11 @@ jobs:
   flatpak:
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/flathub-infra/flatpak-github-actions:freedesktop-24.08
+      image: ghcr.io/flathub-infra/flatpak-github-actions:freedesktop-25.08
       options: --privileged
     steps:
-    - uses: actions/checkout@v4
-    - uses: flatpak/flatpak-github-actions/flatpak-builder@v6
+    - uses: actions/checkout@v7.0.0
+    - uses: flatpak/flatpak-github-actions/flatpak-builder@v6.7
       with:
         bundle: rota.flatpak
         manifest-path: linux/net.hhoney.rota.yml

.github/workflows/godot.yml

@@ -7,36 +7,55 @@ on:
       - released
 
 env:
-  GODOT_VERSION: 3.6
+  GODOT_VERSION: 3.6.2
   EXPORT_NAME: rota-ci
 
 jobs:
   export:
     name: Export
     runs-on: ubuntu-latest
-    container:
-      image: docker.io/smks/godot-ci:3.6
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7.0.0
+
+      - name: Cache Godot Engine downloads
+        id: cache-godot
+        uses: actions/cache@v4
         with:
-          lfs: true
+          path: |
+            export/godot
+            export/editor_data/export_templates/${{ env.GODOT_VERSION }}.stable
+          key: godot-${{ env.GODOT_VERSION }}
 
-      - name: Set up export templates
+      - name: Download Godot Engine from GitHub release
+        id: download
+        if: steps.cache-godot.outputs.cache-hit != 'true'
         run: |
-          mkdir -v -p ~/.local/share/godot/templates/
-          mv /root/.local/share/godot/templates/${GODOT_VERSION}.stable ~/.local/share/godot/templates/${GODOT_VERSION}.stable
+          mkdir -p export && cd export
 
-      - name: Export
+          # Download Godot Engine itself
+          wget https://github.com/godotengine/godot/releases/download/${GODOT_VERSION}-stable/Godot_v${GODOT_VERSION}-stable_linux_headless.64.zip && \
+          unzip Godot_v${GODOT_VERSION}-stable_linux_headless.64.zip && \
+          mv Godot_v${GODOT_VERSION}-stable_linux_headless.64 godot
+
+          # Download export templates
+          mkdir -p editor_data/export_templates
+          wget https://github.com/godotengine/godot/releases/download/${GODOT_VERSION}-stable/Godot_v${GODOT_VERSION}-stable_export_templates.tpz && \
+          unzip Godot_v${GODOT_VERSION}-stable_export_templates.tpz && \
+          mv templates editor_data/export_templates/${GODOT_VERSION}.stable
+
+      - name: Export PCK file
         run: |
-          mkdir --verbose --parents ./export/linux
-          godot --no-window --path=./project.godot --export-pack "Linux/X11" ./export/linux/${EXPORT_NAME}.pck
+          # Tell Godot Engine to be self-contained
+          touch export/._sc_
+
+          export/godot --no-window --path=. --export-pack "Linux/X11" export/${EXPORT_NAME}.pck
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7.0.1
         with:
           name: ${{ env.EXPORT_NAME }}
-          path: export/linux/${{ env.EXPORT_NAME }}.pck
+          path: export/${{ env.EXPORT_NAME }}.pck
 
   release:
     name: Release
@@ -45,7 +64,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8.0.1
         with:
           name: ${{ env.EXPORT_NAME }}