A type representing a Mach service's launchd info property list

MachServiceLaunchInfo.swift

//
//  MachServiceLaunchInfo.swift
//
//
//  Created by Stephan Casas on 6/26/24.
//

import Foundation;

/// A type representing a Mach service's `launchd` information property list.
struct MachServiceLaunchInfo: Encodable {
    
    let label: String;
    let machServices: [String: Bool];
    let program: String;
    let programArguments: [String];
    
    /// Create a new `launchd` information representation with the given properties.
    init(label: String, machServices: [String : Bool], program: String, programArguments: [String]) {
        self.label = label
        self.machServices = machServices
        self.program = program
        self.programArguments = programArguments
    }
    
    enum CodingKeys: CodingKey {
        case Label, MachServices, Program, ProgramArguments;
    }
    
    func encode(to encoder: any Encoder) throws {
        var container = encoder.container(keyedBy: CodingKeys.self);
        
        try container.encode(self.label, forKey: .Label);
        try container.encode(self.machServices, forKey: .MachServices);
        try container.encode(self.program, forKey: .Program);
        try container.encode(self.programArguments, forKey: .ProgramArguments);
    }
    
}

// MARK: - Privileged Helper Tools

extension MachServiceLaunchInfo {
    
    /// Create a new `launchd` information representation for a privileged helper tool with the given program name.
    static func launchInfoForPrivilegedHelperTool(named programName: String) -> MachServiceLaunchInfo {
        let execPath = "/Library/PrivilegedHelperTools/\(programName)";
        
        return .init(
            label: programName,
            machServices: [programName: true],
            program: execPath,
            programArguments: [execPath]);
    }
    
    /// Create and write a `launchd` information property list for a privileged helper tool with the given program name.
    static func writeLaunchInfoForPrivilegedHelperTool(named programName: String) throws {
        let encoder = PropertyListEncoder();
        encoder.outputFormat = .xml;
        
        try encoder.encode(Self.launchInfoForPrivilegedHelperTool(named: programName))
            .write(to: .init(filePath: "/Library/LaunchDaemons/\(programName).plist"));
    }
    
}