Merge pull request #23 from sportngin/brew-gem-breakup

Brew gem breakup

.gitignore

@@ -0,0 +1,9 @@
+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/

.rspec

@@ -0,0 +1,2 @@
+--format documentation
+--color

.ruby-version

@@ -0,0 +1 @@
+2.3.1

.travis.yml

@@ -0,0 +1,5 @@
+sudo: false
+language: ruby
+rvm:
+  - 2.2.2
+before_install: gem install bundler -v 1.12.3

Gemfile

@@ -0,0 +1,4 @@
+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in brew-gem.gemspec
+gemspec

README.md

@@ -33,6 +33,17 @@ sudo /usr/bin/gem update --system
 Install
 -------
 
+There are two ways to install `brew-gem`, via Homebrew or via Rubygems. Usually
+the Rubygems release will track ahead of the Homebrew recipe, so to receive the
+latest features, use the Rubygems install instructions.
+
+Via Rubygems:
+
+    gem install brew-gem
+    brew-gem install brew-gem
+
+Via Homebrew:
+
     brew install brew-gem
 
 

Rakefile

@@ -0,0 +1,9 @@
+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec) do |t|
+  # Specify RSPECOPTS=... on the rake command line to set extra RSpec flags
+  t.rspec_opts = ENV['RSPECOPTS'] if ENV['RSPECOPTS']
+end
+
+task :default => :spec

bin/brew-gem

@@ -1,112 +1,7 @@
 #!/usr/bin/env ruby
 
-if  !ARGV[0] || ARGV[0] == 'help'
-  abort "Please specify a gem name (e.g. brew gem command <name>)
-  install - Install a brew gem, accepts an optional version argument (e.g. brew gem install <name> <version>)
-  upgrade - Upgrade to the latest version of a brew gem
-  uninstall - Uninstall a brew gem"
-end
+BREW_GEM_HOME = File.expand_path('../..', __FILE__)
 
-command = ARGV[0]
-name = ARGV[1]
-gems = `gem list --remote "^#{name}$"`.lines
-unless gems.detect { |f| f =~ /^#{name} \(([^\s,]+).*\)/ }
-  abort "Could not find a valid gem '#{name}'"
-end
-version = ARGV[2] || $1
-
-klass = 'Gem' + name.capitalize.gsub(/[-_.\s]([a-zA-Z0-9])/) { $1.upcase }.gsub('+', 'x')
-user_gemrc = "#{ENV['HOME']}/.gemrc"
-
-require 'erb'
-template = ERB.new(File.read(__FILE__).split(/^__END__$/, 2)[1].strip)
-
-require 'tempfile'
-filename = File.join Dir.tmpdir, "gem-#{name}.rb"
-
-begin
-  open(filename, 'w') do |f|
-    f.puts template.result(binding)
-  end
-
-  system "brew #{command} #{filename}"
-ensure
-  File.unlink filename
-end
-
-__END__
-require 'formula'
-require 'fileutils'
-
-class RubyGemsDownloadStrategy < AbstractDownloadStrategy
-  def fetch
-    ohai "Fetching <%= name %> from gem source"
-    HOMEBREW_CACHE.cd do
-      system "gem", "fetch", "<%= name %>", "--version", resource.version
-    end
-  end
-
-  def cached_location
-    Pathname.new("#{HOMEBREW_CACHE}/<%= name %>-#{resource.version}.gem")
-  end
-
-  def clear_cache
-    cached_location.unlink if cached_location.exist?
-  end
-end
-
-class <%= klass %> < Formula
-  url "<%= name %>", :using => RubyGemsDownloadStrategy
-  version "<%= version %>"
-
-  def install
-    # Copy user's RubyGems config to temporary build home.
-    buildpath_gemrc = "#{ENV['HOME']}/.gemrc"
-    if File.exists?('<%= user_gemrc %>') && !File.exists?(buildpath_gemrc)
-      FileUtils.cp('<%= user_gemrc %>', buildpath_gemrc)
-    end
-
-    # set GEM_HOME and GEM_PATH to make sure we package all the dependent gems
-    # together without accidently picking up other gems on the gem path since
-    # they might not be there if, say, we change to a different rvm gemset
-    ENV['GEM_HOME']="#{prefix}"
-    ENV['GEM_PATH']="#{prefix}"
-    system "gem", "install", cached_download,
-             "--no-ri",
-             "--no-rdoc",
-             "--no-wrapper",
-             "--no-user-install",
-             "--install-dir", prefix,
-             "--bindir", bin
-
-    bin.rmtree if bin.exist?
-    bin.mkpath
-
-    brew_gem_prefix = prefix+"gems/<%= name %>-#{version}"
-
-    completion_for_bash = Dir[
-                            "#{brew_gem_prefix}/completion{s,}/<%= name %>.{bash,sh}",
-                            "#{brew_gem_prefix}/**/<%= name %>_completion{s,}.{bash,sh}"
-                          ].first
-    bash_completion.install completion_for_bash if completion_for_bash
-
-    completion_for_zsh = Dir[
-                           "#{brew_gem_prefix}/completions/<%= name %>.zsh",
-                           "#{brew_gem_prefix}/**/<%= name %>_completion{s,}.zsh"
-                         ].first
-    zsh_completion.install completion_for_zsh if completion_for_zsh
-
-    ruby_libs = Dir.glob("#{prefix}/gems/*/lib")
-    Pathname.glob("#{brew_gem_prefix}/bin/*").each do |file|
-      (bin+file.basename).open('w') do |f|
-        f << <<-RUBY
-#!/usr/bin/ruby
-ENV['GEM_HOME']="#{prefix}"
-ENV['GEM_PATH']="#{prefix}"
-$:.unshift(#{ruby_libs.map(&:inspect).join(",")})
-load "#{file}"
-        RUBY
-      end
-    end
-  end
-end
+$LOAD_PATH.unshift(File.join(BREW_GEM_HOME, 'lib'))
+require 'brew/gem'
+Brew::Gem::CLI.run(ARGV)

brew-gem.gemspec

@@ -0,0 +1,33 @@
+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'brew/gem/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "brew-gem"
+  spec.version       = Brew::Gem::VERSION
+  spec.authors       = ["Nick Sieger"]
+  spec.email         = ["[email protected]"]
+
+  spec.summary       = %q{Generate Homebrew formulas to install standalone ruby gems.}
+  spec.description   = %q{This gem can be installed with "brew install brew-gem" and used to install gems with "brew gem install <gem>".}
+  spec.homepage      = "https://github.com/sportngin/brew-gem"
+
+  # Prevent pushing this gem to RubyGems.org. To allow pushes either set the 'allowed_push_host'
+  # to allow pushing to a single host or delete this section to allow pushing to any host.
+  if spec.respond_to?(:metadata)
+    spec.metadata['allowed_push_host'] = "https://rubygems.org/"
+  else
+    raise "RubyGems 2.0 or newer is required to protect against public gem pushes."
+  end
+
+  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_development_dependency "bundler", "~> 1.12"
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rspec", "~> 3.0"
+  spec.add_development_dependency "aruba", "~> 0.14.0"
+end

lib/brew/gem.rb

@@ -0,0 +1,7 @@
+module Brew
+  module Gem
+  end
+end
+
+require "brew/gem/cli"
+require "brew/gem/version"

lib/brew/gem/cli.rb

@@ -0,0 +1,73 @@
+require 'erb'
+require 'tempfile'
+
+module Brew::Gem::CLI
+  module_function
+
+  COMMANDS = {
+    "install"   => ("Install a brew gem, accepts an optional version argument\n" +
+                    "            (e.g. brew gem install <name> [version])"),
+    "upgrade"   => "Upgrade to the latest version of a brew gem",
+    "uninstall" => "Uninstall a brew gem",
+    "info"      => "Show information for an installed gem",
+    "help"      => "This message"
+  }
+
+  def help_msg
+    (["Please specify a gem name (e.g. brew gem command <name>)"] +
+      COMMANDS.map {|name, desc| "  #{name} - #{desc}"}).join("\n")
+  end
+
+  def fetch_version(name, version = nil)
+    gems = `gem list --remote "^#{name}$"`.lines
+
+    unless gems.detect { |f| f =~ /^#{name} \(([^\s,]+).*\)/ }
+      abort "Could not find a valid gem '#{name}'"
+    end
+
+    version ||= $1
+    version
+  end
+
+  def process_args(args)
+    abort help_msg unless args[0]
+    abort "unknown command: #{args[0]}\n#{help_msg}" unless COMMANDS.keys.include?(args[0])
+
+    if args[0] == 'help'
+      STDERR.puts help_msg
+      exit 0
+    end
+
+    args[0..2]
+  end
+
+  def expand_formula(name, version)
+    klass         = 'Gem' + name.capitalize.gsub(/[-_.\s]([a-zA-Z0-9])/) { $1.upcase }.gsub('+', 'x')
+    user_gemrc    = "#{ENV['HOME']}/.gemrc"
+    template_file = File.expand_path('../formula.rb.erb', __FILE__)
+    template      = ERB.new(File.read(template_file))
+    template.result(binding)
+  end
+
+  def with_temp_formula(name, version)
+    filename = File.join Dir.tmpdir, "gem-#{name}.rb"
+
+    open(filename, 'w') do |f|
+      f.puts expand_formula(name, version)
+    end
+
+    yield filename
+  ensure
+    File.unlink filename
+  end
+
+  def run(args = ARGV)
+    command, name, supplied_version = process_args(args)
+
+    version = fetch_version(name, supplied_version)
+
+    with_temp_formula(name, version) do |filename|
+      system "brew #{command} #{filename}"
+    end
+  end
+end

lib/brew/gem/formula.rb.erb

@@ -0,0 +1,77 @@
+# -*- ruby -*-
+
+require 'formula'
+require 'fileutils'
+
+class RubyGemsDownloadStrategy < AbstractDownloadStrategy
+  def fetch
+    ohai "Fetching <%= name %> from gem source"
+    HOMEBREW_CACHE.cd do
+      system "gem", "fetch", "<%= name %>", "--version", resource.version
+    end
+  end
+
+  def cached_location
+    Pathname.new("#{HOMEBREW_CACHE}/<%= name %>-#{resource.version}.gem")
+  end
+
+  def clear_cache
+    cached_location.unlink if cached_location.exist?
+  end
+end
+
+class <%= klass %> < Formula
+  url "<%= name %>", :using => RubyGemsDownloadStrategy
+  version "<%= version %>"
+
+  def install
+    # Copy user's RubyGems config to temporary build home.
+    buildpath_gemrc = "#{ENV['HOME']}/.gemrc"
+    if File.exists?('<%= user_gemrc %>') && !File.exists?(buildpath_gemrc)
+      FileUtils.cp('<%= user_gemrc %>', buildpath_gemrc)
+    end
+
+    # set GEM_HOME and GEM_PATH to make sure we package all the dependent gems
+    # together without accidently picking up other gems on the gem path since
+    # they might not be there if, say, we change to a different rvm gemset
+    ENV['GEM_HOME']="#{prefix}"
+    ENV['GEM_PATH']="#{prefix}"
+    system "gem", "install", cached_download,
+             "--no-ri",
+             "--no-rdoc",
+             "--no-wrapper",
+             "--no-user-install",
+             "--install-dir", prefix,
+             "--bindir", bin
+
+    bin.rmtree if bin.exist?
+    bin.mkpath
+
+    brew_gem_prefix = prefix+"gems/<%= name %>-#{version}"
+
+    completion_for_bash = Dir[
+                            "#{brew_gem_prefix}/completion{s,}/<%= name %>.{bash,sh}",
+                            "#{brew_gem_prefix}/**/<%= name %>_completion{s,}.{bash,sh}"
+                          ].first
+    bash_completion.install completion_for_bash if completion_for_bash
+
+    completion_for_zsh = Dir[
+                           "#{brew_gem_prefix}/completions/<%= name %>.zsh",
+                           "#{brew_gem_prefix}/**/<%= name %>_completion{s,}.zsh"
+                         ].first
+    zsh_completion.install completion_for_zsh if completion_for_zsh
+
+    ruby_libs = Dir.glob("#{prefix}/gems/*/lib")
+    Pathname.glob("#{brew_gem_prefix}/bin/*").each do |file|
+      (bin+file.basename).open('w') do |f|
+        f << <<-RUBY
+#!/usr/bin/ruby
+ENV['GEM_HOME']="#{prefix}"
+ENV['GEM_PATH']="#{prefix}"
+$:.unshift(#{ruby_libs.map(&:inspect).join(",")})
+load "#{file}"
+        RUBY
+      end
+    end
+  end
+end

lib/brew/gem/version.rb

@@ -0,0 +1,5 @@
+module Brew
+  module Gem
+    VERSION = "0.7.0"
+  end
+end

spec/brew/gem/cli_spec.rb

@@ -0,0 +1,17 @@
+require 'spec_helper'
+
+RSpec.describe Brew::Gem::CLI do
+  context "#expand_formula" do
+    subject(:formula) { described_class.expand_formula("foo-bar", "1.2.3") }
+
+    it "generates valid Ruby" do
+      IO.popen("ruby -c -", "r+") { |f| f.puts formula }
+      expect($?).to be_success
+    end
+
+    it { is_expected.to match(/class GemFooBar < Formula/) }
+
+    it { is_expected.to match(/version "1\.2\.3"/) }
+  end
+
+end