From cd780e2d37ef9ce73d60cf682984a5bfe690a14e Mon Sep 17 00:00:00 2001
From: Ragnor Comerford <hello@ragnor.co>
Date: Thu, 7 May 2026 15:25:22 +0200
Subject: [PATCH] deps: add arc-swap to workspace for PR 2
 catalog/schema_source wrapping

PR 2 wraps the Omnigraph engine's catalog and schema_source fields in
ArcSwap so reads stay zero-cost while apply_schema can swap atomically
without &mut self. arc-swap lands as an unused workspace dep here so the
follow-up commits that wrap fields can land in isolation.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
---
 Cargo.lock                  | 1 +
 Cargo.toml                  | 1 +
 crates/omnigraph/Cargo.toml | 1 +
 3 files changed, 3 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index 10f0055..0b1a6ee 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4639,6 +4639,7 @@ dependencies = [
 name = "omnigraph-engine"
 version = "0.4.1"
 dependencies = [
+ "arc-swap",
  "arrow-array",
  "arrow-cast",
  "arrow-ord",
diff --git a/Cargo.toml b/Cargo.toml
index 2878bf7..761f29b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -56,6 +56,7 @@ tower-http = { version = "0.6", features = ["trace"] }
 color-eyre = "0.6"
 tempfile = "3"
 ahash = "0.8"
+arc-swap = "1"
 base64 = "0.22"
 ariadne = "0.4"
 regex = "1"
diff --git a/crates/omnigraph/Cargo.toml b/crates/omnigraph/Cargo.toml
index 3871904..58e573f 100644
--- a/crates/omnigraph/Cargo.toml
+++ b/crates/omnigraph/Cargo.toml
@@ -47,6 +47,7 @@ time = { workspace = true }
 async-trait = { workspace = true }
 url = { workspace = true }
 chrono = { workspace = true }
+arc-swap = { workspace = true }
 
 [dev-dependencies]
 omnigraph-compiler = { path = "../omnigraph-compiler", version = "0.4.1" }