feat: Monorepo Pin Update (#604)

* feat: monorepo pin update

* fix: update action tests workflow

* fix: hoist just install

.github/workflows/action_tests.yaml

@@ -14,15 +14,10 @@ jobs:
     steps:
       - name: Checkout sources
         uses: actions/checkout@v4
+      - uses: taiki-e/install-action@just
+      - uses: dtolnay/rust-toolchain@stable
       - name: Clone monorepo
-        run: |
-          git clone https://github.com/ethereum-optimism/monorepo
-          # September 30, 2024
-          cd monorepo && git checkout d05fb505809717282d5cee7264a09d26002a4ddd
-      - name: Install just
-        uses: taiki-e/install-action@just
-      - name: Install Rust stable toolchain
-        uses: dtolnay/rust-toolchain@stable
+        run: just monorepo
       - uses: Swatinem/rust-cache@v2
         with:
           cache-on-failure: true

.github/workflows/monorepo_pin_update.yaml

@@ -0,0 +1,41 @@
+name: Update the monorepo pin commit
+
+on:
+  schedule:
+    - cron:  '30 5 */2 * *'
+  workflow_dispatch:
+
+jobs:
+  monorepo-pin:
+    name: Update the monorepo pinned commit
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+          token: ${{ secrets.PAT_TOKEN }}
+      - uses: taiki-e/install-action@just
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Update Monorepo Commit 
+        run: just update-monorepo
+      - name: Create Pull Request
+        id: cpr
+        uses: peter-evans/create-pull-request@v7
+        with:
+          token: ${{ secrets.PAT_TOKEN }}
+          commit-message: Update Monorepo Commit
+          signoff: false
+          branch: bot/update-monorepo
+          base: main
+          delete-branch: true
+          title: '[BOT] Update Monorepo'
+          body: |
+            ### Description
+            
+            Automated PR to update the monorepo commit.
+          labels: |
+            A-ci
+            C-bot
+          assignees: refcell
+          draft: false

.monorepo

@@ -0,0 +1 @@
+d05fb505809717282d5cee7264a09d26002a4ddd

justfile

@@ -164,3 +164,12 @@ build-client-prestate-asterisc kona_tag asterisc_tag out='./prestate-artifacts-a
     --build-arg ASTERISC_TAG={{asterisc_tag}} \
     --platform linux/amd64 \
     .
+# Clones and checks out the monorepo at the commit present in `.monorepo`
+monorepo:
+  [ ! -d monorepo ] && git clone https://github.com/ethereum-optimism/monorepo
+  cd monorepo && git checkout $(cat ../.monorepo)
+
+# Updates the pinned version of the monorepo
+update-monorepo:
+  [ ! -d monorepo ] && git clone https://github.com/ethereum-optimism/monorepo
+  cd monorepo && git rev-parse HEAD > ../.monorepo