Initial public release of Warp.

Repo-Sync-Origin: warpdotdev/warp-internal@12af1d983b

.github/workflows/sync-pr-checks.yml

@@ -0,0 +1,32 @@
+# Fails a required status check if a pull request from one `repo-sync/*`
+# branch targets another `repo-sync/*` branch.  Combined with branch
+# protection on `repo-sync/**` requiring this check, this prevents one sync
+# PR from being merged into another sync PR's branch (which would bypass the
+# restacking flow and corrupt the sync stack).
+#
+# PRs from non-`repo-sync/*` branches into `repo-sync/*` branches (e.g. for
+# conflict resolution) are intentionally allowed.  Direct pushes to
+# `repo-sync/*` branches are also unaffected, since only the `pull_request`
+# trigger is used here.
+
+name: Sync PR Checks
+on:
+  pull_request:
+    types: [opened, reopened, edited, synchronize, ready_for_review]
+
+jobs:
+  check:
+    name: Verify PR base is the default branch
+    runs-on: ubuntu-slim
+    steps:
+      - name: Fail if merging a repo-sync branch into another repo-sync branch
+        env:
+          BASE_REF: ${{ github.base_ref }}
+          HEAD_REF: ${{ github.head_ref }}
+        run: |
+          if [[ "$BASE_REF" == repo-sync/* && "$HEAD_REF" == repo-sync/* ]]; then
+            echo "::error::repo-sync/* PRs cannot be merged into other repo-sync/* branches."
+            echo "Wait for repo-sync to retarget this PR to the default branch before merging."
+            exit 1
+          fi
+          echo "Base branch '$BASE_REF' and head branch '$HEAD_REF' are OK."