Merge branch 'master' into slice_chunkby_clone

Author: nwoods-cimpress

.github/workflows/ci.yml

@@ -58,8 +58,8 @@ jobs:
           COMMIT_MESSAGE: ${{ github.event.head_commit.message }}
         run: |
           cd src/ci/citool
-          cargo test
-          cargo run calculate-job-matrix >> $GITHUB_OUTPUT
+          CARGO_INCREMENTAL=0 cargo test
+          CARGO_INCREMENTAL=0 cargo run calculate-job-matrix >> $GITHUB_OUTPUT
         id: jobs
   job:
     name: ${{ matrix.full_name }}
@@ -182,6 +182,13 @@ jobs:
       - name: show the current environment
         run: src/ci/scripts/dump-environment.sh
 
+      # Pre-build citool before the following step uninstalls rustup
+      # Build it into the build directory, to avoid modifying sources
+      - name: build citool
+        run: |
+          cd src/ci/citool
+          CARGO_INCREMENTAL=0 CARGO_TARGET_DIR=../../../build/citool cargo build
+
       - name: run the build
         # Redirect stderr to stdout to avoid reordering the two streams in the GHA logs.
         run: src/ci/scripts/run-build-from-ci.sh 2>&1
@@ -218,16 +225,22 @@ jobs:
         # erroring about invalid credentials instead.
         if: github.event_name == 'push' || env.DEPLOY == '1' || env.DEPLOY_ALT == '1'
 
+      - name: postprocess metrics into the summary
+        run: |
+          if [ -f build/metrics.json ]; then
+            ./build/citool/debug/citool postprocess-metrics build/metrics.json ${GITHUB_STEP_SUMMARY}
+          elif [ -f obj/build/metrics.json ]; then
+            ./build/citool/debug/citool postprocess-metrics obj/build/metrics.json ${GITHUB_STEP_SUMMARY}
+          else
+            echo "No metrics.json found"
+          fi
+
       - name: upload job metrics to DataDog
         if: needs.calculate_matrix.outputs.run_type != 'pr'
         env:
-          DATADOG_SITE: datadoghq.com
           DATADOG_API_KEY: ${{ secrets.DATADOG_API_KEY }}
           DD_GITHUB_JOB_NAME: ${{ matrix.full_name }}
-        run: |
-          cd src/ci
-          npm ci
-          python3 scripts/upload-build-metrics.py ../../build/cpu-usage.csv
+        run: ./build/citool/debug/citool upload-build-metrics build/cpu-usage.csv
 
   # This job isused to tell bors the final status of the build, as there is no practical way to detect
   # when a workflow is successful listening to webhooks only in our current bors implementation (homu).

.github/workflows/post-merge.yml

@@ -0,0 +1,36 @@
+# Workflow that runs after a merge to master, analyses changes in test executions
+# and posts the result to the merged PR.
+
+name: Post merge analysis
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  analysis:
+    runs-on: ubuntu-24.04
+    if: github.repository == 'rust-lang/rust'
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+      - name: Perform analysis and send PR
+        run: |
+          # Get closest bors merge commit
+          PARENT_COMMIT=`git rev-list --author='bors <bors@rust-lang.org>' -n1 --first-parent HEAD^1`
+
+          # Find PR for the current commit
+          HEAD_PR=`gh pr list --search "${{ github.sha }}" --state merged --json number --jq '.[0].number'`
+
+          echo "Parent: ${PARENT_COMMIT}"
+          echo "HEAD: ${{ github.sha }} (#${HEAD_PR})"
+
+          cd src/ci/citool
+
+          echo "Post-merge analysis result" > output.log
+          cargo run --release post-merge-analysis ${PARENT_COMMIT} ${{ github.sha }} >> output.log
+          cat output.log
+
+          gh pr comment ${HEAD_PR} -F output.log