XPC updater POC

Sources/ReleasesDownloader/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>XPCService</key>
+	<dict>
+		<key>ServiceType</key>
+		<string>Application</string>
+	</dict>
+</dict>
+</plist>

Sources/ReleasesDownloader/ReleasesDownloader.swift

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+import Foundation
+import Brief
+
+final class ReleasesDownloader: NSObject, ReleasesDownloaderProtocol {
+
+    @objc func downloadReleases(with reply: @escaping (Data?, (any Error)?) -> Void) {
+        Task {
+            do {
+                let (data, _) = try await URLSession.shared.data(from: Constants.updateURL)
+                let releases = try JSONDecoder().decode([Release].self, from: data)
+                print(releases)
+                let jsonOut = try JSONEncoder().encode(releases)
+                reply(jsonOut, nil)
+            } catch {
+                reply(nil, error)
+            }
+        }
+    }
+}
+
+extension ReleasesDownloader {
+
+    enum Constants {
+        static let updateURL = URL(string: "https://api.github.com/repos/maxgoedjen/secretive/releases")!
+    }
+
+}

Sources/ReleasesDownloader/main.swift

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+import Foundation
+import Brief
+
+class ServiceDelegate: NSObject, NSXPCListenerDelegate {
+    
+    func listener(_ listener: NSXPCListener, shouldAcceptNewConnection newConnection: NSXPCConnection) -> Bool {
+        newConnection.exportedInterface = NSXPCInterface(with: (any ReleasesDownloaderProtocol).self)
+        let exportedObject = ReleasesDownloader()
+        newConnection.exportedObject = exportedObject
+        newConnection.resume()
+        return true
+    }
+}
+
+let delegate = ServiceDelegate()
+let listener = NSXPCListener.service()
+listener.delegate = delegate
+listener.resume()