macos: config API

macos/Sources/GhosttyApp.swift

@@ -1,15 +1,68 @@
+import OSLog
 import SwiftUI
 import GhosttyKit
 
 @main
 struct GhosttyApp: App {
-    init() {
-        assert(ghostty_init() == GHOSTTY_SUCCESS, "ghostty failed to initialize");
-    }
+    static let logger = Logger(
+        subsystem: Bundle.main.bundleIdentifier!,
+        category: String(describing: GhosttyApp.self)
+    )
+    
+    /// The ghostty global state. Only one per process.
+    @StateObject private var ghostty = GhosttyState()
     
     var body: some Scene {
         WindowGroup {
-            Text("Hello!").font(.largeTitle)
+            switch ghostty.readiness {
+            case .error:
+                Text("Error")
+            case .ready:
+                Text("Hello!").font(.largeTitle)
+            }
         }
     }
 }
+
+class GhosttyState: ObservableObject {
+    enum Readiness {
+        case error, ready
+    }
+    
+    /// The readiness value of the state.
+    var readiness: Readiness { ghostty != nil ? .ready : .error }
+    
+    /// The ghostty global state.
+    var ghostty: ghostty_t? = nil
+    
+    /// The ghostty global configuration.
+    var config: ghostty_config_t? = nil
+    
+    init() {
+        // Initialize ghostty global state. This happens once per process.
+        guard let g = ghostty_init() else {
+            GhosttyApp.logger.critical("ghostty_init failed")
+            return
+        }
+        
+        // Initialize the global configuration.
+        guard let cfg = ghostty_config_new(g) else {
+            GhosttyApp.logger.critical("ghostty_config_new failed")
+            return
+        }
+        
+        // TODO: we'd probably do some config loading here... for now we'd
+        // have to do this synchronously. When we support config updating we can do
+        // this async and update later.
+        
+        // Finalize will make our defaults available.
+        ghostty_config_finalize(cfg)
+        
+        ghostty = g;
+        config = cfg;
+    }
+    
+    deinit {
+        ghostty_config_free(ghostty, config)
+    }
+}