Split out libraries into SPM packages (#298)

Sources/Secretive/Controllers/LaunchAgentController.swift

@@ -0,0 +1,43 @@
+import Foundation
+import ServiceManagement
+import AppKit
+import OSLog
+import SecretKit
+
+struct LaunchAgentController {
+    
+    func install(completion: (() -> Void)? = nil) {
+        Logger().debug("Installing agent")
+        _ = setEnabled(false)
+        // This is definitely a bit of a "seems to work better" thing but:
+        // Seems to more reliably hit if these are on separate runloops, otherwise it seems like it sometimes doesn't kill old
+        // and start new?
+        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+            _  = setEnabled(true)
+            completion?()
+        }
+
+    }
+
+    func forceLaunch(completion: ((Bool) -> Void)?) {
+        Logger().debug("Agent is not running, attempting to force launch")
+        let url = Bundle.main.bundleURL.appendingPathComponent("Contents/Library/LoginItems/SecretAgent.app")
+        let config = NSWorkspace.OpenConfiguration()
+        config.activates = false
+        NSWorkspace.shared.openApplication(at: url, configuration: config) { app, error in
+            DispatchQueue.main.async {
+                completion?(error == nil)
+            }
+            if let error = error {
+                Logger().error("Error force launching \(error.localizedDescription)")
+            } else {
+                Logger().debug("Agent force launched")
+            }
+        }
+    }
+
+    private func setEnabled(_ enabled: Bool) -> Bool {
+        SMLoginItemSetEnabled(Bundle.main.agentBundleID as CFString, enabled)
+    }
+
+}