ImageStore: write state.json atomically (#835)

ArnavReddy · web-flow · commit 55d1dc95e286 · 2026-08-10T09:43:03.000-04:00
save() encodes into state.json in place, so a concurrent reader can
observe a truncated or garbled file.
diff --git a/Sources/Containerization/Image/ImageStore/ImageStore+ReferenceManager.swift b/Sources/Containerization/Image/ImageStore/ImageStore+ReferenceManager.swift
@@ -49,7 +49,7 @@ extension ImageStore {
 
         private func save(_ state: State) throws {
             let statePath = self.path.appendingPathComponent("state.json")
-            try JSONEncoder().encode(state).write(to: statePath)
+            try JSONEncoder().encode(state).write(to: statePath, options: .atomic)
         }
 
         public func delete(reference: String) throws {

Original file line number	Diff line number	Diff line change
`@@ -49,7 +49,7 @@ extension ImageStore {`
`49`	`49`
`50`	`50`	`private func save(_ state: State) throws {`
`51`	`51`	`let statePath = self.path.appendingPathComponent("state.json")`
`52`		`- try JSONEncoder().encode(state).write(to: statePath)`
	`52`	`+ try JSONEncoder().encode(state).write(to: statePath, options: .atomic)`
`53`	`53`	`}`
`54`	`54`
`55`	`55`	`public func delete(reference: String) throws {`