Check if nightlies have succeeded recently enough (#4840)

Contributes to rapidsai/build-planning#127

This PR cannot be merged unless nightly CI has passed within the past 7 days, so if it remains unmerged that will itself be an indication that nightly CI needs fixing.

Authors:
  - Vyas Ramasubramani (https://github.com/vyasr)
  - Ralph Liu (https://github.com/nv-rliu)

Approvers:
  - Rick Ratzel (https://github.com/rlratzel)
  - Bradley Dice (https://github.com/bdice)
  - James Lamb (https://github.com/jameslamb)

URL: #4840

.github/workflows/pr.yaml

@@ -13,6 +13,7 @@ jobs:
   # Please keep pr-builder as the top job here
   pr-builder:
     needs:
+      - check-nightly-ci
       - changed-files
       - checks
       - conda-cpp-build
@@ -42,6 +43,18 @@ jobs:
       - name: Telemetry setup
         if: ${{ vars.TELEMETRY_ENABLED == 'true' }}
         uses: rapidsai/shared-actions/telemetry-dispatch-stash-base-env-vars@main
+  check-nightly-ci:
+    # Switch to ubuntu-latest once it defaults to a version of Ubuntu that
+    # provides at least Python 3.11 (see
+    # https://docs.python.org/3/library/datetime.html#datetime.date.fromisoformat)
+    runs-on: ubuntu-24.04
+    env:
+      RAPIDS_GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - name: Check if nightly CI is passing
+        uses: rapidsai/shared-actions/check_nightly_success/dispatch@main
+        with:
+          repo: cugraph
   changed-files:
     secrets: inherit
     needs: telemetry-setup