kp-pietro-messineo

The Five Files

Companion handout — Who's the Senior Dev Now? Pietro Messineo · Engineering Manager, ExpressVPN iOS

Everything an agent needs to write code that looks like your team wrote it, and the order to write it in. Nothing here is specific to our repo — the shape is the part that transfers.

The five template files are in this gist, below this one. They're skeletons with FILL markers everywhere your team's specifics go. Copy them in, fill them, delete what doesn't apply to you. Examples are Swift/SwiftUI because that's the room I wrote them for; the structure is language-agnostic.

---

macguru

/// A task that is cancelled if goes out of scope, i.e. the last reference on it has been discarded.
public final class ScopedTask<Success: Sendable, Failure: Error>: Sendable {
	/// The underlying task
	let wrapped: Task<Success, Failure>
	
	/// Wraps a task into a scoped task.
	init(wrapping task: Task<Success, Failure>) {
		wrapped = task
	}

ole

// UserDefaults KVO observation with AsyncSequence/AsyncStream
// Ole Begemann, 2023-04
// Updated for Swift 6, 2024-11
// https://gist.github.com/ole/fc5c1f4c763d28d9ba70940512e81916

import Foundation

// This is ugly, but UserDefaults is documented to be thread-safe, so this
// should be OK.
extension UserDefaults: @retroactive @unchecked Sendable {}

jpsim

This gist documents the steps to analyze the binary size allocation for SwiftLint (and other SwiftPM-based executables).

First, install Bloaty McBloatface: https://github.com/google/bloaty

Then run the following:

$ swift build -c release
$ ditto .build/release/swiftlint swiftlint-stripped
$ strip -rSTX swiftlint-stripped

clindsay3

extension Error {
    var code: Int { return (self as NSError).code }
    var domain: String { return (self as NSError).domain }
    var userInfo: [String:Any] { return (self as NSError).userInfo }

    func timeAfterWhichToRetry(retryCount: Int) -> TimeInterval? {
        // CloudKit suggests us retry too often, so slow us down as we retry a lot, up to 5 minutes
        if let suggestedTimeout = suggestedTimeAfterWhichToRetry {
            if suggestedTimeAfterWhichToRetry == 0 {
                return 0

lukaskubanek

/// MIT License
///
/// Copyright (c) 2021 Lukas Kubanek, Structured Path GmbH
///
/// Permission is hereby granted, free of charge, to any person obtaining a copy
/// of this software and associated documentation files (the "Software"), to deal
/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
/// furnished to do so, subject to the following conditions:

saagarjha

// To compile: clang++ -arch x86_64 -arch arm64 -arch arm64e -std=c++20 library_injector.cpp -lbsm -lEndpointSecurity -o library_injector,
// then codesign with com.apple.developer.endpoint-security.client and run the
// program as root.

#include <EndpointSecurity/EndpointSecurity.h>
#include <algorithm>
#include <array>
#include <bsm/libbsm.h>
#include <cstddef>
#include <cstdint>

ethanhuang13

//
//  VirtualKeyboard.swift
//  MacBook Air M1 Zhuyin Keyboard
//  Written with SwiftUI ~=300 LOC, < 4hrs
//  Created by Ethan Huang on 2021/1/13.
//  Twitter: @ethanhuang13

import SwiftUI

struct VirtualKeyboard: View {

steipete

import Foundation
import os.log

class URLCacheTest {
    let logger = Logger(subsystem: "URLCacheTest", category: "main")

    // HTTP HEADERS:
    // Date: Wed, 04 Nov 2020 11:13:24 GMT
    // Server: Apache
    // Strict-Transport-Security: max-age=63072000; includeSubdomains; preload

DreamingInBinary

# A Best in Class Checklist
A boiled down checklist adapted from this [post](https://www.swiftjectivec.com/a-best-in-class-app/), created by @jordanmorgan10.

> To use this, create a Github Issue in your own repo, and simply copy and paste this text.

## iOS Core Technology
_Things any iOS app can benefit from_

- [ ] iCloud Sync
- [ ] Focus Filter Support