add Tap class

Library/Homebrew/tap.rb

@@ -0,0 +1,97 @@
+class Tap
+  TAP_DIRECTORY = HOMEBREW_LIBRARY/"Taps"
+
+  extend Enumerable
+
+  attr_reader :user
+  attr_reader :repo
+  attr_reader :name
+  attr_reader :path
+  attr_reader :remote
+
+  def initialize(user, repo, remote=nil)
+    # we special case homebrew so users don't have to shift in a terminal
+    @user = user == "homebrew" ? "Homebrew" : user
+    @repo = repo
+    @name = "#{@user}/#{@repo}".downcase
+    @path = TAP_DIRECTORY/"#{@user}/homebrew-#{@repo}".downcase
+    if installed?
+      @path.cd do
+        @remote = Utils.popen_read("git", "config", "--get", "remote.origin.url").chomp
+      end
+    else
+      @remote = remote || "https://github.com/#{@user}/homebrew-#{@repo}"
+    end
+  end
+
+  def to_s
+    name
+  end
+
+  def official?
+    @user == "Homebrew"
+  end
+
+  def private?
+    return true if custom_remote?
+    GitHub.private_repo?(@user, "homebrew-#{@repo}")
+  rescue GitHub::HTTPNotFoundError
+    true
+  rescue GitHub::Error
+    false
+  end
+
+  def installed?
+    (@path/".git").directory?
+  end
+
+  def custom_remote?
+    @remote.casecmp("https://github.com/#{@user}/homebrew-#{@repo}") != 0
+  end
+
+  def formula_files
+    dir = [@path/"Formula", @path/"HomebrewFormula", @path].detect(&:directory?)
+    return [] unless dir
+    dir.children.select { |p| p.extname == ".rb" }
+  end
+
+  def formula_names
+    formula_files.map { |f| "#{name}/#{f.basename(".rb")}" }
+  end
+
+  def command_files
+    Pathname.glob("#{path}/cmd/brew-*").select(&:executable?)
+  end
+
+  def to_hash
+    {
+      "name" => @name,
+      "user" => @user,
+      "repo" => @repo,
+      "path" => @path.to_s,
+      "remote" => @remote,
+      "installed" => installed?,
+      "official" => official?,
+      "custom_remote" => custom_remote?,
+      "formula_names" => formula_names,
+      "formula_files" => formula_files.map(&:to_s),
+      "command_files" => command_files.map(&:to_s),
+    }
+  end
+
+  def self.each
+    return unless TAP_DIRECTORY.directory?
+
+    TAP_DIRECTORY.subdirs.each do |user|
+      user.subdirs.each do |repo|
+        if (repo/".git").directory?
+          yield new(user.basename.to_s, repo.basename.to_s.sub("homebrew-", ""))
+        end
+      end
+    end
+  end
+
+  def self.names
+    map(&:name)
+  end
+end