1 files changed, 9 insertions, 0 deletions
diff --git a/nix/bufCheck/default.nix b/nix/bufCheck/default.nix
new file mode 100644
index 000000000000..d0f07d996b73
--- /dev/null
+++ b/nix/bufCheck/default.nix
@@ -0,0 +1,9 @@
+# Check protobuf breaking. Lints already happen in individual targets.
+#
+{ depot, pkgs, ... }:
+
+pkgs.writeShellScriptBin "ci-buf-check" ''
+  export PATH="$PATH:${pkgs.lib.makeBinPath [ pkgs.buf ]}"
+  # Report-only
+  (cd $(git rev-parse --show-toplevel) && (buf breaking . --against "./.git#ref=HEAD~1" || true))
+''