setup_cache_for_template: support url in template parameter

Signed-off-by: Norio Nomura <[email protected]>

.github/actions/setup_cache_for_template/action.yml

@@ -27,7 +27,16 @@ runs:
       set -eux
       arch="${{ inputs.arch }}"
       template="${{ inputs.template }}"
-      test -f "$template" || exit 1
+      case "$template" in
+        https://*)
+          tmp_yaml=$(mktemp -d)/template.yaml
+          curl -sSLf "$template" > $tmp_yaml || exit 1
+          template=$tmp_yaml
+          ;;
+        *)
+          test -f "$template" || exit 1
+          ;;
+      esac
 
       # detect arch from template if not provided
       arch="${arch:-$(yq '.arch // ""' "$template")}"

.github/workflows/test.yml

@@ -367,11 +367,10 @@ jobs:
     - uses: actions/setup-go@v5
       with:
         go-version: 1.22.x
-    - name: Cache ~/Library/Caches/lima/download
-      uses: actions/cache@v4
+    - name: Cache image used by ${{ matrix.oldver }}/examples/ubuntu-lts.yaml
+      uses: ./.github/actions/setup_cache_for_template
       with:
-        path: ~/Library/Caches/lima/download
-        key: ${{ runner.os }}-upgrade-${{ matrix.oldver }}
+        template: https://raw.githubusercontent.com/lima-vm/lima/${{ matrix.oldver }}/examples/ubuntu-lts.yaml
     - name: Install test dependencies
       run: brew install qemu bash coreutils
     - name: Test