chore: Add Commit Checker github action

.github/workflows/build-prs.yml

@@ -11,6 +11,36 @@ env:
   GH_USER_EMAIL: [email protected]
   GH_USER_NAME: dsp-developers
 jobs:
+  commit_checker:
+    name: Run Commit Checker report
+    runs-on: ubuntu-latest
+    needs: build-pr-images
+    steps:
+      - name: Get Commits
+        id: get-commits
+        run: |
+          master_commit=$(cat .git/refs/remotes/origin/master)
+          echo "master_commit_hash=$master_commit" >> $GITHUB_OUTPUT
+          last_commit=$(cat .git/refs/remotes/pull/${{ github.event.pull_request.number }}/merge)
+          echo "last_commit_hash=$last_commit" >> $GITHUB_OUTPUT
+      - name: Run Commit Checker
+        shell: bash
+        env:
+          GH_TOKEN: ${{ secrets.GH_TOKEN_PROJECT_EDIT }}
+        continue-on-error: true
+        run: |
+          git config user.email "${{ env.GH_USER_EMAIL }}"
+          git config user.name "${{ env.GH_USER_NAME }}"
+
+          cat <<"EOF" >> /tmp/body-file.txt
+          Commit Checker results:
+          ==== These are the results of the commit checker scans         ====
+          ==== If these are not commits from upstream kfp, then          ====
+          ==== please ensure you adhere to the commit checker formatting ====
+          $(podman run -q -v ${{ github.workspace }}:/src/app-root quay.io/rmartine/commitchecker:latest --start ${{ steps.get-commits.outputs.master_commit_hash }} --end ${{ steps.get-commits.outputs.last_commit_hash }})
+          EOF
+
+          gh pr comment ${{ github.event.pull_request.number }} --body-file /tmp/body-file.txt
   fetch-data:
     name: Fetch workflow payload
     runs-on: ubuntu-latest

tools/commit_checker/Dockerfile

@@ -0,0 +1,28 @@
+FROM registry.access.redhat.com/ubi8/go-toolset:1.20 as builder
+
+WORKDIR /tmp
+RUN git clone https://github.com/openshift/build-machinery-go.git && \
+    cd /tmp/build-machinery-go/commitchecker && \
+    go build
+
+FROM registry.access.redhat.com/ubi8/ubi-minimal:8.9
+
+WORKDIR /bin
+
+COPY --from=builder /tmp/build-machinery-go/commitchecker/commitchecker /bin/commitchecker
+RUN microdnf install git && \
+    chmod +x /bin/commitchecker && \
+    mkdir -p /src/app-root
+
+WORKDIR /src/app-root
+ENTRYPOINT ["commitchecker"]
+
+VOLUME ["/src/app-root"]
+
+LABEL name="Commit Checker tool" \
+      summary="commitchecker validates a range of commits in a git repository and ensures they meet specific requirements: \
+        1. The author's email address does not start with "root@". \
+        2. The message starts with one of: \
+            i. UPSTREAM: <PR number|carry|drop>: description \
+            ii. UPSTREAM: revert: \
+        This is useful for repositories that are downstream forks of upstream repositories."