Oscar Bonilla ob

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

Debugging the Swift Toolchain

Use these steps to debug components of the Swift toolchain. This allows you to see Swift's source code from the debugger – instead of disassembly. The debugger can also provide some variable names and values. This has been initially tested with libswiftCore.dylib.

These instructions were updated as of Swift 5.2.1.

Prerequisites

Minecraft on Raspberry Pi cluster with metrics

Ever wanted to put your Rapsberry Pi cluster to great use? Our team is working remotely, so we started to play Minecraft. I decided I would host the Minecraft server on my Raspberry Pi cluster. This gist will guide you through the steps I took to get a k3s cluster up with k3sup and later installed Minecraft as well as metrics exporter and Prometheus Operator

Why?

Quoniam Possumus - Because we can

You'll need

Various search databases and backends as alternatives to Elasticsearch.

Rust

Sonic - github.com/valeriansaliou/sonic - lightweight & schema-less search backend
Tantivy - github.com/quickwit-oss/tantivy - full-text search engine library inspired by Apache Lucene
Toshi - github.com/toshi-search/Toshi - search engine built on top of Tantivy
Bayard - github.com/mosuka/bayard - search engine built on top of Tantivy
Meilisearch - github.com/meilisearch/meilisearch - fast and full-featured search engine

New Build System Tricks

Command Line

# enable internal menu
defaults write com.apple.dt.Xcode ShowDVTDebugMenu -bool YES

alias xcbuild=$(xcode-select -p)/../SharedFrameworks/XCBuild.framework/Versions/A/Support/xcbuild

What I Wish I'd Known About Equity Before Joining A Unicorn

Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.

This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would

Verify and Repair Disk Permissions via Terminal (Mac OS X)

Verify Permissions

diskutil verifyPermissions /

Repair Permissions

diskutil repairPermissions /

LLDB Cheat Sheet

A complete gdb to lldb command map.

Print out

Print object

(lldb) po responseObject
(lldb) po [responseObject objectForKey@"state"]

p - Print primitive type

	// swift -Xfrontend -debug-constraints

	infix operator ^&&^ : LogicalConjunctionPrecedence
	infix operator ^\|\|^ : LogicalConjunctionPrecedence

	struct T{}
	struct F{}

	func λ(_ f : (T) -> ()) {
	print("true")

	# Install tmux 2.8 on Centos

	# install deps
	yum install gcc kernel-devel make ncurses-devel

	# cd src
	cd /usr/local/src

	# DOWNLOAD SOURCES FOR LIBEVENT AND MAKE AND INSTALL
	curl -LO https://github.com/libevent/libevent/releases/download/release-2.1.8-stable/libevent-2.1.8-stable.tar.gz