Use latest api-spec build artifact for proto conversion

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

Author: lucy66hw

.github/workflows/convert-proto.yml

@@ -32,32 +32,76 @@ jobs:
           distribution: temurin
           java-version: 17
 
-      - name: Download Release Assets
-        uses: robinraju/release-downloader@28fc21f50d76778e7023361aa1f863e717d3d56f # 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: Resolve API spec build artifact
+        id: api_spec_artifact
         uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410 # 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 workflow_id = "build.yml";
+            const branch = "main";
+
+            const response = await github.rest.actions.listWorkflowRuns({
               owner,
               repo,
-              sha: "main",
+              workflow_id,
+              branch,
+              event: "push",
+              status: "completed",
               per_page: 1
             });
-            const latestCommit = commits.data[0].sha;
-            core.setOutput("latest_commit", latestCommit);
-            console.log("Latest commit: " + latestCommit);
+            const selectedRun = response.data.workflow_runs[0];
+
+            if (!selectedRun) {
+              core.setFailed("Could not find a completed api-spec build run on main.");
+              return;
+            }
+
+            const artifacts = await github.rest.actions.listWorkflowRunArtifacts({
+              owner,
+              repo,
+              run_id: selectedRun.id
+            });
+            const selectedArtifact = artifacts.data.artifacts.find(
+              (artifact) => artifact.name === "build" && !artifact.expired
+            );
+
+            if (!selectedArtifact) {
+              core.setFailed(`Latest completed api-spec build run ${selectedRun.id} does not have a non-expired build artifact.`);
+              return;
+            }
+
+            core.setOutput("source_commit", selectedRun.head_sha);
+            core.setOutput("run_id", String(selectedRun.id));
+            core.setOutput("run_conclusion", selectedRun.conclusion || "unknown");
+            core.setOutput("artifact_id", String(selectedArtifact.id));
+            core.setOutput("artifact_download_url", selectedArtifact.archive_download_url);
+            console.log(
+              `Using build artifact ${selectedArtifact.id} from run ${selectedRun.id} (${selectedRun.conclusion}) at commit ${selectedRun.head_sha}`
+            );
+
+      - name: Download API spec build artifact
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          curl -L \
+            -H "Authorization: Bearer $GH_TOKEN" \
+            -H "Accept: application/vnd.github+json" \
+            -o api-spec-build.zip \
+            "${{ steps.api_spec_artifact.outputs.artifact_download_url }}"
+
+          rm -rf api-spec-build
+          unzip -q api-spec-build.zip -d api-spec-build
+
+          SPEC_PATH=$(find api-spec-build -name opensearch-openapi.yaml -print -quit)
+          if [ -z "$SPEC_PATH" ]; then
+            echo "Could not find opensearch-openapi.yaml in downloaded artifact"
+            exit 1
+          fi
+
+          cp "$SPEC_PATH" opensearch-openapi.yaml
 
       - name: Get Latest OpenSearch Core Version
         id: get_opensearch_version
@@ -164,7 +208,7 @@ 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.api_spec_artifact.outputs.source_commit }})"
           signoff: true
           base: main
           delete-branch: true
@@ -173,7 +217,8 @@ 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.api_spec_artifact.outputs.source_commit }}
+            **API Spec Build Run**: ${{ steps.api_spec_artifact.outputs.run_id }} (${{ steps.api_spec_artifact.outputs.run_conclusion }})
 
             ---