ghostty/macos/Sources/Ghostty/Extensions/NSWorkspace+Ghostty.swift

import AppKit
import UniformTypeIdentifiers

extension NSWorkspace {
    /// Checks if Ghostty is the default terminal application.
    /// - Returns: True if Ghostty is the default application for handling public.unix-executable files.
    var isGhosttyDefaultTerminal: Bool {
        let ghosttyURL = Bundle.main.bundleURL
        guard let defaultAppURL = defaultApplicationURL(forContentType: "public.unix-executable") else {
            return false
        }
        // Compare bundle paths
        return ghosttyURL.path == defaultAppURL.path
    }
    
    /// Sets Ghostty as the default terminal application.
    /// - Throws: An error if the application bundle cannot be located or if setting the default fails.
    func setGhosttyAsDefaultTerminal() throws {
        let ghosttyURL = Bundle.main.bundleURL
        
        // Create UTType for unix executables
        guard let unixExecutableType = UTType("public.unix-executable") else {
            throw NSError(
                domain: "com.mitchellh.ghostty",
                code: 2,
                userInfo: [NSLocalizedDescriptionKey: "Could not create UTType for public.unix-executable"]
            )
        }
        
        // Use NSWorkspace API to set the default application
        // This API is available on macOS 12.0+, Ghostty supports 13.0+, so it's compatible
        setDefaultApplication(at: ghosttyURL, toOpen: unixExecutableType)
    }
}