From 67809233d47e672d65c4ee1730e0cfc2bb23600b Mon Sep 17 00:00:00 2001
From: Pekka Enberg <penberg@iki.fi>
Date: Sun, 29 Jun 2025 09:16:46 +0300
Subject: [PATCH] github: Run simulator on pull requests

---
 .github/workflows/rust.yml | 11 +++++++++++
 scripts/run-sim            | 29 +++++++++++++++++++++++++++--
 2 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 26206ac63..23b64eece 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -64,6 +64,17 @@ jobs:
         run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
       - run: wasm-pack build --target nodejs bindings/wasm
 
+  simulator:
+    runs-on: blacksmith-4vcpu-ubuntu-2404
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v3
+      - uses: useblacksmith/rust-cache@v3
+        with:
+          prefix-key: "v1-rust" # can be updated if we need to reset caches due to non-trivial change in the dependencies (for example, custom env var were set for single workspace project)
+      - name: Install the project
+        run: ./scripts/run-sim --iterations 50
+
   test-limbo:
     runs-on: blacksmith-4vcpu-ubuntu-2404
     timeout-minutes: 20
diff --git a/scripts/run-sim b/scripts/run-sim
index 69192eaca..9985a70f3 100755
--- a/scripts/run-sim
+++ b/scripts/run-sim
@@ -2,6 +2,31 @@
 
 set -e
 
-while true; do
-    cargo run -p limbo_sim
+iterations=""
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        --iterations)
+            iterations="$2"
+            shift 2
+            ;;
+        *)
+            echo "Unknown option: $1"
+            echo "Usage: $0 [--max-iterations N]"
+            exit 1
+            ;;
+    esac
 done
+
+if [[ -n "$iterations" ]]; then
+    echo "Running limbo_sim for $iterations iterations..."
+    for ((i=1; i<=iterations; i++)); do
+        echo "Iteration $i of $iterations"
+        cargo run -p limbo_sim
+    done
+    echo "Completed $iterations iterations"
+else
+    echo "Running limbo_sim in infinite loop..."
+    while true; do
+        cargo run -p limbo_sim
+    done
+fi