chore(CI): Refactor and re-enable simulator nightly

.github/workflows/_rust_tests.yml

@@ -6,6 +6,9 @@ on:
       changedCrates:
         type: string
         required: false
+      runSimtest:
+        type: boolean
+        default: true
 
 concurrency:
   group: rust-tests-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
@@ -118,6 +121,7 @@ jobs:
 
   simtest:
     name: Simtest rust
+    if: inputs.runSimtest
     timeout-minutes: 45
     runs-on: [self-hosted]
     env:

.github/workflows/nightly.yml

@@ -4,6 +4,17 @@ on:
   schedule:
     - cron: "0 0 * * *" # every day at midnight
   workflow_dispatch:
+    inputs:
+      iota_ref:
+        description: "Branch / commit to simtest"
+        type: string
+        required: true
+        default: develop
+      test_num:
+        description: "MSIM_TEST_NUM (test iterations)"
+        type: string
+        required: false
+        default: "30"
 
 env:
   BINARY_LIST_FILE: "./binary-build-list.json"
@@ -27,6 +38,8 @@ env:
   RUSTUP_MAX_RETRIES: 10
   # Don't emit giant backtraces in the CI logs.
   RUST_BACKTRACE: short
+  IOTA_REF: "${{ github.event.inputs.iota_ref || 'develop' }}"
+  TEST_NUM: "${{ github.event.inputs.test_num || '30' }}"
 
 jobs:
   release:
@@ -61,6 +74,9 @@ jobs:
 
   tests:
     uses: ./.github/workflows/_rust_tests.yml
+    with:
+      # simtest job below runs a superset of these tests
+      runSimtest: false
 
   external-tests:
     uses: ./.github/workflows/_external_rust_tests.yml
@@ -84,3 +100,17 @@ jobs:
 
   split-cluster:
     uses: ./.github/workflows/split_cluster.yml
+
+  simtest:
+    timeout-minutes: 240
+    runs-on: [self-hosted]
+
+    steps:
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+        with:
+          ref: ${{ env.IOTA_REF }}
+      - uses: taiki-e/install-action@375e0c7f08a66b8c2ba7e7eef31a6f91043a81b0 # v2.44.38
+        with:
+          tool: nextest
+      - name: Run simtest
+        run: scripts/simtest/simtest-run.sh