Use spec build artifact for auto proto convert

Signed-off-by: xil <fridalu66@gmail.com>

Author: lucy66hw

.github/workflows/convert-proto.yml

@@ -31,32 +31,72 @@ jobs:
           distribution: temurin
           java-version: 17
 
-      - name: Download Release Assets
-        uses: robinraju/release-downloader@v1
-        with:
-          repository: 'opensearch-project/opensearch-api-specification'
-          latest: true
-          fileName: 'opensearch-openapi.yaml'
-          tag: 'main-latest'
-          preRelease: true
-
-      - name: Get Latest Commit ID
-        id: get_commit
+      - name: Get Latest Spec Build Run
+        id: get_spec_build
         uses: actions/github-script@v6
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
             const owner = "opensearch-project";
             const repo = "opensearch-api-specification";
-            const commits = await github.rest.repos.listCommits({
+            const runs = await github.rest.actions.listWorkflowRuns({
               owner,
               repo,
-              sha: "main",
-              per_page: 1
+              workflow_id: "build.yml",
+              branch: "main",
+              event: "push",
+              per_page: 20
             });
-            const latestCommit = commits.data[0].sha;
-            core.setOutput("latest_commit", latestCommit);
-            console.log("Latest commit: " + latestCommit);
+
+            const latestSuccessfulRun = runs.data.workflow_runs.find(
+              (run) => run.conclusion === "success"
+            );
+
+            if (!latestSuccessfulRun) {
+              core.setFailed("Could not find a successful build.yml workflow run on main.");
+              return;
+            }
+
+            core.setOutput("run_id", String(latestSuccessfulRun.id));
+            core.setOutput("head_sha", latestSuccessfulRun.head_sha);
+            console.log("Latest successful build run: " + latestSuccessfulRun.id);
+            console.log("Spec commit: " + latestSuccessfulRun.head_sha);
+
+      - name: Download Latest Spec Build Artifact
+        id: download_build_artifact
+        uses: actions/download-artifact@v5
+        with:
+          name: build
+          path: spec-build
+          github-token: ${{ secrets.API_SPEC_ACTIONS_READ_TOKEN || github.token }}
+          repository: opensearch-project/opensearch-api-specification
+          run-id: ${{ steps.get_spec_build.outputs.run_id }}
+        continue-on-error: true
+
+      - name: Download Latest Spec Release Asset Fallback
+        if: steps.download_build_artifact.outcome != 'success'
+        uses: robinraju/release-downloader@v1
+        with:
+          repository: 'opensearch-project/opensearch-api-specification'
+          latest: true
+          fileName: 'opensearch-openapi.yaml'
+          tag: 'main-latest'
+          preRelease: true
+
+      - name: Prepare OpenAPI Spec Source
+        run: |
+          SPEC_FILE=""
+          if [ -d spec-build ]; then
+            SPEC_FILE=$(find spec-build -maxdepth 3 -name 'opensearch-openapi.yaml' -print | head -n 1)
+          fi
+          if [ -z "$SPEC_FILE" ]; then
+            SPEC_FILE=$(find . -maxdepth 3 -name 'opensearch-openapi.yaml' -print | head -n 1)
+          fi
+          if [ -z "$SPEC_FILE" ]; then
+            echo "Could not locate opensearch-openapi.yaml from the spec source."
+            exit 1
+          fi
+          cp "$SPEC_FILE" opensearch-openapi.yaml
 
       - name: Get Latest OpenSearch Core Version
         id: get_opensearch_version
@@ -163,7 +203,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           branch: auto-pr-branch
           commit-message: "Protobuf schema change detected"
-          title: "[Automated PR]: Update generated protobuf schema (OpenSearch: ${{ steps.get_opensearch_version.outputs.version }}, spec commit: ${{ steps.get_commit.outputs.latest_commit }})"
+          title: "[Automated PR]: Update generated protobuf schema (OpenSearch: ${{ steps.get_opensearch_version.outputs.version }}, spec commit: ${{ steps.get_spec_build.outputs.head_sha }})"
           signoff: true
           base: main
           delete-branch: true
@@ -172,7 +212,7 @@ jobs:
             This pull request was automatically generated by GitHub Actions.
 
             **OpenSearch Version**: ${{ steps.get_opensearch_version.outputs.version }}
-            **API Spec Commit**: ${{ steps.get_commit.outputs.latest_commit }}
+            **API Spec Commit**: ${{ steps.get_spec_build.outputs.head_sha }}
 
             ---