add acvm rust test

.github/workflows/rust.yml

@@ -0,0 +1,58 @@
+name: ACVM Rust
+
+on: [push, pull_request]
+
+jobs:
+  clippy-n-test:
+    name: Test on ${{ matrix.os }}
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 30
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu
+            runner: ubuntu-latest
+            target: x86_64-linux
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - uses: cachix/install-nix-action@v22
+        with:
+          nix_path: nixpkgs=channel:nixos-22.11
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: cachix/cachix-action@v12
+        with:
+          name: barretenberg
+
+      - name: Restore nix store cache
+        id: nix-store-cache
+        uses: actions/cache@v3
+        with:
+          path: /tmp/nix-cache
+          key: ${{ runner.os }}-flake-${{ hashFiles('*.lock') }}
+
+      # Based on https://github.com/marigold-dev/deku/blob/b5016f0cf4bf6ac48db9111b70dd7fb49b969dfd/.github/workflows/build.yml#L26
+      - name: Copy cache into nix store
+        if: steps.nix-store-cache.outputs.cache-hit == 'true'
+        # We don't check the signature because we're the one that created the cache
+        run: |
+          for narinfo in /tmp/nix-cache/*.narinfo; do
+            path=$(head -n 1 "$narinfo" | awk '{print $2}')
+            nix copy --no-check-sigs --from "file:///tmp/nix-cache" "$path"
+          done
+
+      - name: Run `nix flake check`
+        working-directory: acvm-repo
+        run: |
+          nix flake check -L
+
+      - name: Export cache from nix store
+        if: steps.nix-store-cache.outputs.cache-hit != 'true'
+        working-directory: acvm-repo
+        run: |
+          nix copy --to "file:///tmp/nix-cache?compression=zstd&parallel-compression=true" .#cargo-artifacts