Prefetch HLS

Author: hasufell

.github/workflows/test.yml

@@ -28,6 +28,12 @@ jobs:
         uses: haskell/actions/setup@v1
         with:
           ghc-version: ${{ matrix.ghc }}
+      - run: |
+          mkdir -p test-workspace/bin/
+          export GHCUP_INSTALL_BASE_PREFIX=$(pwd)/bin
+          ghcup --no-verbose prefetch hls 1.4.0
+          ghcup --no-verbose prefetch hls latest
+        shell: bash
       - run: npm ci
       - run: npm run webpack
       - run: xvfb-run -s '-screen 0 640x480x16' -a npm test