Building Homebrew in Ruby

Homebrew is a popular macOS package manager in the Ruby community and is also written in Ruby. As Homebrew isn't a web application and doesn't provide a Ruby library, the Ruby ecosystem works great for us in some ways and less great in others. Learn about things we love, hate and struggle with because Homebrew is built in Ruby.

Transcript

1. @MikeMcQuaid Building Homebrew in Ruby
2. @MikeMcQuaid
3. @MikeMcQuaid Mike McQuaid mike@mikemcquaid.com https://github.com/MikeMcQuaid A
4. @MikeMcQuaid Homebrew Ruby
5. @MikeMcQuaid Ruby 2.6 in 2019
6. @MikeMcQuaid Ruby 1.8 in 2016
7. @MikeMcQuaid Ruby 2.3 in 2019
8. @MikeMcQuaid /usr/bin/ruby 2.3.7p456
9. @MikeMcQuaid ./Library/Homebrew/ vendor/portable-ruby/ 2.3.7/bin/ruby
10. @MikeMcQuaid ↙
11. @MikeMcQuaid brew irb == irb/pry brew man == ronn brew prof == ruby-prof brew style == rubocop brew tests == rspec brew vendor-gems == bundle install --standalone
12. @MikeMcQuaid bundle install
13. @MikeMcQuaid bundle exec brew
14. @MikeMcQuaid Library/Homebrew/Gemfile
15. @MikeMcQuaid Library/Homebrew/vendor/ bundle/bundler/setup.rb
16. @MikeMcQuaid $:.unshift "#{path}/../ #{ruby_engine}/ #{ruby_version}/gems/ concurrent-ruby-1.1.5/lib"
17. @MikeMcQuaid Library/Homebrew/vendor/ bundle/ruby/2.3.0/ extensions/universal- darwin-18/2.3.0/
18. @MikeMcQuaid ActiveSupport String#present?
19. @MikeMcQuaid RuboCop 0
20. @MikeMcQuaid brew style
21. @MikeMcQuaid brew style wget
22. @MikeMcQuaid
23. @MikeMcQuaid No Ruby API
24. @MikeMcQuaid
25. @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": {
26. @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": {
27. @MikeMcQuaid Bash $ time brew shellenv >/dev/null … 91% cpu 0.223 total Ruby $ time brew help >/dev/null … 96% cpu 0.852 total
28. @MikeMcQuaid Bash $ time brew shellenv >/dev/null … 91% cpu 0.223 total Ruby(Kaigi) $ time brew help >/dev/null … 96% cpu 0.754 total
29. @MikeMcQuaid Formula DSL
30. @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
31. @MikeMcQuaid require "cli_parser" module Homebrew module_function def home_args Homebrew::CLI::Parser.new do usage_banner <<~EOS `home` [<formula>] Open <formula>'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
32. @MikeMcQuaid Homebrew ❤ Ruby and Ruby community
33. @MikeMcQuaid questions?