Trim the Godot template cache and separate CI cache keys

Cache only Linux/Windows/macOS/Web release templates instead of the full 1.2 GB
archive, and use distinct binary cache keys for the checks and build jobs so
concurrent runs do not fight over the same cache entry.

.gitea/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: /usr/local/bin/godot
-          key: godot-${{ runner.os }}-${{ env.GODOT_VERSION }}-v1
+          key: godot-checks-${{ runner.os }}-${{ env.GODOT_VERSION }}-v2
 
       - name: Install Godot 4.7.2
         run: |
@@ -75,13 +75,13 @@ jobs:
         uses: actions/cache@v4
         with:
           path: /usr/local/bin/godot
-          key: godot-${{ runner.os }}-${{ env.GODOT_VERSION }}-v1
+          key: godot-build-${{ runner.os }}-${{ env.GODOT_VERSION }}-v2
 
       - name: Restore export templates cache
         uses: actions/cache@v4
         with:
           path: ~/.local/share/godot/export_templates/4.7.2.stable
-          key: godot-templates-${{ runner.os }}-${{ env.GODOT_VERSION }}-v1
+          key: godot-templates-${{ runner.os }}-${{ env.GODOT_VERSION }}-v2
 
       - name: Install Godot 4.7.2 and export templates
         run: |
@@ -92,17 +92,26 @@ jobs:
             sudo install /tmp/godot-bin/Godot_v4.7.2-stable_linux.x86_64 /usr/local/bin/godot
           fi
           godot --version
-          if [ -f "$HOME/.local/share/godot/export_templates/4.7.2.stable/linux_release.x86_64" ]; then
-            ls "$HOME/.local/share/godot/export_templates/4.7.2.stable" | head -5
+          TEMPLATE_DIR="$HOME/.local/share/godot/export_templates/4.7.2.stable"
+          NEEDED="version.txt icudt_godot.dat linux_release.x86_64 windows_release_x86_64.exe macos.zip web_nothreads_release.zip web_dlink_nothreads_release.zip"
+          missing=0
+          for file in $NEEDED; do
+            [ -f "$TEMPLATE_DIR/$file" ] || missing=1
+          done
+          if [ "$missing" -eq 0 ]; then
+            echo "export templates restored from cache"
+            ls "$TEMPLATE_DIR" | head -10
             exit 0
           fi
           curl -sL -o /tmp/templates.tpz \
             https://github.com/godotengine/godot/releases/download/4.7.2-stable/Godot_v4.7.2-stable_export_templates.tpz
           rm -rf /tmp/tpl && mkdir -p /tmp/tpl
           unzip -qo /tmp/templates.tpz -d /tmp/tpl
-          mkdir -p "$HOME/.local/share/godot/export_templates/4.7.2.stable"
-          cp /tmp/tpl/templates/* "$HOME/.local/share/godot/export_templates/4.7.2.stable/"
-          ls "$HOME/.local/share/godot/export_templates/4.7.2.stable" | head -5
+          mkdir -p "$TEMPLATE_DIR"
+          for file in $NEEDED; do
+            cp "/tmp/tpl/templates/$file" "$TEMPLATE_DIR/$file"
+          done
+          ls "$TEMPLATE_DIR" | head -10
 
       - name: Import project
         run: godot --headless --import