[libc++] Trigger the buildkite CI only if stages 1 and 2 already passed

.ci/generate-buildkite-pipeline-premerge

@@ -197,17 +197,6 @@ function check-targets() {
 
 # Project specific pipelines.
 
-# If libc++ or one of the runtimes directories changed.
-if echo "$modified_dirs" | grep -q -E "^(libcxx|libcxxabi|libunwind|runtimes|cmake)$"; then
-  cat <<EOF
-- trigger: "libcxx-ci"
-  build:
-    message: "${buildMessage}"
-    commit: "${BUILDKITE_COMMIT}"
-    branch: "${BUILDKITE_BRANCH}"
-EOF
-fi
-
 # If clang changed.
 if echo "$modified_dirs" | grep -q -E "^(clang)$"; then
   cat <<EOF

.github/workflows/libcxx-build-and-test.yaml

@@ -207,3 +207,14 @@ jobs:
             **/CMakeError.log
             **/CMakeOutput.log
             **/crash_diagnostics/*
+  buildkite-stage:
+    if: github.repository_owner == 'philnik777'
+    runs-on: ubuntu-latest
+    continue-on-error: false
+    steps:
+      - name: Trigger Buildkite Pipeline
+        uses: buildkite/[email protected]
+        with:
+          buildkite_api_access_token: ${{ secrets.TRIGGER_BK_BUILD_TOKEN }}
+          pipeline: "llvm-project/libcxx-ci"
+          ignore_pipeline_branch_filter: true