macOS: Run scripts using stdin rather than executing directly (#7654)

Fixes #7647

See #7647 for context. This commit works by extending the `input` work
introduced in #7652 to libghostty so that the macOS can take advantage
of it. At that point, it's just the macOS utilizing `input` in order to
set the command and `exit` up similar to Terminal and iTerm2.

This applies both to files opened directly by Ghostty as well as the App
Intent to run a command in a new terminal.

include/ghostty.h

@@ -413,6 +413,7 @@ typedef struct {
   const char* command;
   ghostty_env_var_s* env_vars;
   size_t env_var_count;
+  const char* initial_input;
 } ghostty_surface_config_s;
 
 typedef struct {

macos/Sources/App/macOS/AppDelegate.swift

@@ -384,10 +384,17 @@ class AppDelegate: NSObject,
             config.workingDirectory = filename
             _ = TerminalController.newTab(ghostty, withBaseConfig: config)
         } else {
-            // When opening a file, open a new window with that file as the command,
+            // When opening a file, we want to execute the file. To do this, we
-            // and its parent directory as the working directory.
+            // don't override the command directly, because it won't load the
-            config.command = filename
+            // profile/rc files for the shell, which is super important on macOS
+            // due to things like Homebrew. Instead, we set the command to
+            // `<filename>; exit` which is what Terminal and iTerm2 do.
+            config.initialInput = "\(filename); exit\n"
+
+            // Set the parent directory to our working directory so that relative
+            // paths in scripts work.
             config.workingDirectory = (filename as NSString).deletingLastPathComponent
+
             _ = TerminalController.newWindow(ghostty, withBaseConfig: config)
         }
 

macos/Sources/Features/App Intents/IntentPermission.swift

@@ -45,7 +45,7 @@ func requestIntentPermission() async -> Bool {
 
 
             PermissionRequest.show(
-                "org.mitchellh.ghostty.shortcutsPermission",
+                "com.mitchellh.ghostty.shortcutsPermission",
                 message: "Allow Shortcuts to interact with Ghostty?",
                 allowDuration: .forever,
                 rememberDuration: nil,

macos/Sources/Features/App Intents/NewTerminalIntent.swift

@@ -19,7 +19,7 @@ struct NewTerminalIntent: AppIntent {
 
     @Parameter(
         title: "Command",
-        description: "Command to execute instead of the default shell."
+        description: "Command to execute within your configured shell.",
     )
     var command: String?
 
@@ -60,7 +60,12 @@ struct NewTerminalIntent: AppIntent {
         let ghostty = appDelegate.ghostty
 
         var config = Ghostty.SurfaceConfiguration()
-        config.command = command
+
+        // We don't run command as "command" and instead use "initialInput" so
+        // that we can get all the login scripts to setup things like PATH.
+        if let command {
+            config.initialInput = "\(command); exit\n"
+        }
 
         // If we were given a working directory then open that directory
         if let url = workingDirectory?.fileURL {

macos/Sources/Ghostty/SurfaceView.swift

@@ -422,6 +422,9 @@ extension Ghostty {
         /// Environment variables to set for the terminal
         var environmentVariables: [String: String] = [:]
 
+        /// Extra input to send as stdin
+        var initialInput: String? = nil
+
         init() {}
 
         init(from config: ghostty_surface_config_s) {
@@ -450,13 +453,13 @@ extension Ghostty {
         func withCValue<T>(view: SurfaceView, _ body: (inout ghostty_surface_config_s) throws -> T) rethrows -> T {
             var config = ghostty_surface_config_new()
             config.userdata = Unmanaged.passUnretained(view).toOpaque()
-            #if os(macOS)
+#if os(macOS)
             config.platform_tag = GHOSTTY_PLATFORM_MACOS
             config.platform = ghostty_platform_u(macos: ghostty_platform_macos_s(
                 nsview: Unmanaged.passUnretained(view).toOpaque()
             ))
             config.scale_factor = NSScreen.main!.backingScaleFactor
-            #elseif os(iOS)
+#elseif os(iOS)
             config.platform_tag = GHOSTTY_PLATFORM_IOS
             config.platform = ghostty_platform_u(ios: ghostty_platform_ios_s(
                 uiview: Unmanaged.passUnretained(view).toOpaque()
@@ -466,9 +469,9 @@ extension Ghostty {
             // probably set this to some default, then modify the scale factor through
             // libghostty APIs when a UIView is attached to a window/scene. TODO.
             config.scale_factor = UIScreen.main.scale
-            #else
+#else
-            #error("unsupported target")
+#error("unsupported target")
-            #endif
+#endif
 
             // Zero is our default value that means to inherit the font size.
             config.font_size = fontSize ?? 0
@@ -480,6 +483,9 @@ extension Ghostty {
                 return try command.withCString { cCommand in
                     config.command = cCommand
 
+                    return try initialInput.withCString { cInput in
+                        config.initial_input = cInput
+
                         // Convert dictionary to arrays for easier processing
                         let keys = Array(environmentVariables.keys)
                         let values = Array(environmentVariables.values)
@@ -508,6 +514,7 @@ extension Ghostty {
                 }
             }
         }
+    }
 
     #if canImport(AppKit)
     /// When changing the split state, or going full screen (native or non), the terminal view

src/apprt/embedded.zig

@@ -430,6 +430,9 @@ pub const Surface = struct {
         /// Extra environment variables to set for the surface.
         env_vars: ?[*]EnvVar = null,
         env_var_count: usize = 0,
+
+        /// Input to send to the command after it is started.
+        initial_input: ?[*:0]const u8 = null,
     };
 
     pub fn init(self: *Surface, app: *App, opts: Options) !void {
@@ -510,6 +513,19 @@ pub const Surface = struct {
             }
         }
 
+        // If we have an initial input then we set it.
+        if (opts.initial_input) |c_input| {
+            const alloc = config.arenaAlloc();
+            config.input.list.clearRetainingCapacity();
+            try config.input.list.append(
+                alloc,
+                .{ .raw = try alloc.dupeZ(u8, std.mem.sliceTo(
+                    c_input,
+                    0,
+                )) },
+            );
+        }
+
         // Initialize our surface right away. We're given a view that is
         // ready to use.
         try self.core_surface.init(