CI: see if wsl2 works

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

Author: AkihiroSuda

.github/workflows/test.yml

@@ -73,19 +73,41 @@ jobs:
 
   windows:
     name: "Windows tests"
-    runs-on: windows-2022
+    runs-on: windows-2022-8-cores
     timeout-minutes: 30
     steps:
+    - name: Enable WSL2
+      run: |
+        wsl --set-default-version 2
+        wsl --update
+        wsl --status
+        wsl --list --online
+    - name: Install WSL2 distro
+      timeout-minutes: 3
+      run: |
+        # FIXME: At least one distro has to be installed here,
+        # otherwise `wsl --list --verbose` (called from Lima) fails:
+        # https://github.com/lima-vm/lima/pull/1826#issuecomment-1729993334
+        # The distro image itself is not consumed by Lima.
+        # ------------------------------------------------------------------
+        # Ubuntu-22.04:    gets stuck in some infinite loop during adduser
+        # OracleLinux_9_1: almostly silently fails, and just prints "Usage: adduser [options] LOGIN"
+        wsl --install -d openSUSE-Leap-15.5
+        wsl --list --verbose
     - uses: actions/checkout@v4
       with:
         fetch-depth: 1
     - uses: actions/setup-go@v4
       with:
         go-version: 1.21.x
-    - name: Unit tests
-      run: go test -v ./...
     - name: Make
       run: make
+    - name: Smoke test
+      run: |
+        .\_output\bin\limactl.exe start template://experimental/wsl2
+      # TODO: run the full integration tests
+    - name: Unit tests
+      run: go test -v ./...
 
   integration:
     name: Integration tests