ci: allow running locally with gh act

When running with `gh act`, node needs to be installed in all runner
environments and since this is not the case for the Morello docker
image we install it here manually (but only when running with `act`).

Signed-off-by: Alex Richardson <[email protected]>

Author: arichardson

.github/workflows/build.yml

@@ -48,6 +48,16 @@ jobs:
             container: docker.io/ctsrd/morello-sdk:latest
 
     steps:
+      # Install node.js in the docker container to allow testing this action with `gh act` locally.
+      # This is not needed in real GitHub action runs, so limit this to env.ACT being set.
+      - name: Install node.js
+        if: ${{ env.ACT && matrix.compiler == 'llvm-morello' }}
+        run: |
+          sudo apt-get update && sudo apt-get install -y curl
+          curl -fsSL https://deb.nodesource.com/setup_24.x | sudo bash -
+          sudo apt-get update && sudo apt-get install -y nodejs
+          node --version
+
       - name: Checkout code
         uses: actions/checkout@v6