Report coverage percentage.

Signed-off-by: dblock <[email protected]>

.github/workflows/coverage.yml

@@ -10,6 +10,8 @@ env:
 jobs:
   coverage:
     runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v2
@@ -38,4 +40,18 @@ jobs:
           cat diff.json | jq '.newEndpoints | group_by(.pathUrl)[] | .[0].pathUrl + ": " + (map(.method) | tostring)' --raw-output
           echo "-------- Legacy APIs"
           cat diff.json | jq '.missingEndpoints | group_by(.pathUrl)[] | .[0].pathUrl + ": " + (map(.method) | tostring)' --raw-output
-
+      - name: Gather Coverage
+        id: coverage
+        shell: bash
+        run: |
+          echo "current=`cat OpenSearch.openapi.json | jq '.paths | keys[]' | wc -l`" >> $GITHUB_OUTPUT
+          echo "total=`cat OpenSearch.auto.openapi.json | jq '.paths | keys[]' | wc -l`" >> $GITHUB_OUTPUT
+          echo "percent=`$(${{ steps.coverage.outputs.current }}*100/${{ steps.coverage.outputs.total }})`" >> $GITHUB_OUTPUT
+      - name: Report Coverage
+        shell: bash
+        run: |
+          echo API specs implemented for ${{ steps.coverage.outputs.current }}/${{ steps.coverage.outputs.total }} $(${{ steps.coverage.outputs.percent }}%) APIs.
+      - uses: mshick/add-pr-comment@v2
+        with:
+          message: |
+            API specs implemented for ${{ steps.coverage.outputs.current }}/${{ steps.coverage.outputs.total }} $(${{ steps.coverage.outputs.percent }}%) APIs.