@MikeMcQuaid Building Homebrew in Ruby

@MikeMcQuaid

@MikeMcQuaid Mike McQuaid mike@mikemcquaid.com https://github.com/MikeMcQuaid A

@MikeMcQuaid Homebrew Ruby

@MikeMcQuaid Ruby 2.6 in 2019

@MikeMcQuaid Ruby 1.8 in 2016

@MikeMcQuaid Ruby 2.3 in 2019

@MikeMcQuaid /usr/bin/ruby 2.3.7p456

@MikeMcQuaid ./Library/Homebrew/ vendor/portable-ruby/ 2.3.7/bin/ruby

@MikeMcQuaid ↙

@MikeMcQuaid brew irb == irb/pry brew man == ronn brew prof == ruby-prof brew style == rubocop brew tests == rspec brew vendor-gems == bundle install --standalone

@MikeMcQuaid bundle install

@MikeMcQuaid bundle exec brew

@MikeMcQuaid Library/Homebrew/Gemfile

@MikeMcQuaid Library/Homebrew/vendor/ bundle/bundler/setup.rb

@MikeMcQuaid $:.unshift "#{path}/../ #{ruby_engine}/ #{ruby_version}/gems/ concurrent-ruby-1.1.5/lib"

@MikeMcQuaid Library/Homebrew/vendor/ bundle/ruby/2.3.0/ extensions/universal- darwin-18/2.3.0/

@MikeMcQuaid ActiveSupport String#present?

@MikeMcQuaid RuboCop 0

@MikeMcQuaid brew style

@MikeMcQuaid brew style wget

@MikeMcQuaid

@MikeMcQuaid No Ruby API

@MikeMcQuaid

@MikeMcQuaid $ brew info wget --json | jq . [ { "name": "wget", "full_name": "wget", "oldname": null, "aliases": [], "versioned_formulae": [], "desc": "Internet file retriever", "homepage": "https://www.gnu.org/software/wget/", "versions": { "stable": "1.20.3", "devel": null, "head": "HEAD", "bottle": true }, "revision": 0, "version_scheme": 0, "bottle": { "stable": {

@MikeMcQuaid $ curl https://formulae.brew.sh/api/formula/wget.json | jq . [ { "name": "wget", "full_name": "wget", "oldname": null, "aliases": [], "versioned_formulae": [], "desc": "Internet file retriever", "homepage": "https://www.gnu.org/software/wget/", "versions": { "stable": "1.20.3", "devel": null, "head": "HEAD", "bottle": true }, "revision": 0, "version_scheme": 0, "bottle": { "stable": {

@MikeMcQuaid Bash $ time brew shellenv >/dev/null … 91% cpu 0.223 total Ruby $ time brew help >/dev/null … 96% cpu 0.852 total

@MikeMcQuaid Bash $ time brew shellenv >/dev/null … 91% cpu 0.223 total Ruby(Kaigi) $ time brew help >/dev/null … 96% cpu 0.754 total

@MikeMcQuaid Formula DSL

@MikeMcQuaid class Wget < Formula homepage "https://www.gnu.org/software/wget/" url "https://ftp.gnu.org/gnu/wget/wget-…" sha256 "52126be8cf1bddd7536886e74c053ad7d0ed…" def install system "./configure", "--prefix=#{prefix}" system "make", "install" end end

@MikeMcQuaid require "cli_parser" module Homebrew module_function def home_args Homebrew::CLI::Parser.new do usage_banner <<~EOS `home` [] Open 's homepage in a browser. If no formula is provided, open Homebrew's own homepage in a browser. EOS switch :debug end end def home home_args.parse if args.remaining.empty? exec_browser HOMEBREW_WWW else exec_browser(*ARGV.formulae.map(&:homepage)) end end end

@MikeMcQuaid Homebrew ❤ Ruby and Ruby community

@MikeMcQuaid questions?