Refactor the brew command into one file per command

The code was sucking. To the extent that maintenance was hard. It's a lot
easier to work with code that is sensibly split at sensible boundaries. So
now it is more like that.

But the refactor is minimal. Because we don't want you to have more merge
hell than absolutely necessary.

If you merge you will need to pay attention to brew.h.rb (as it is deleted)
and bin/brew (as command logic is gone). It will be painful, but you will just
have to help git out by moving any changes around manually.

Note compatibility.rb. It ensures that any function renames or removals don't
break anything. We're pretty serious about backwards compatibility. And that's
because we encourage you to hack around with the innards. And we couldn't do
that if we would then just make stuff disappear behind your back.

1 files changed, 0 insertions, 146 deletions

diff --git a/Library/Homebrew/update.rb b/Library/Homebrew/update.rb
deleted file mode 100644
index 9e4fb90d9..000000000
--- a/Library/Homebrew/update.rb
+++ /dev/null
@@ -1,146 +0,0 @@
-class RefreshBrew
-  REPOSITORY_URL   = "http://github.com/mxcl/homebrew.git"
-  INIT_COMMAND     = "git init"
-  CHECKOUT_COMMAND = "git checkout -q master"
-  UPDATE_COMMAND   = "git pull #{REPOSITORY_URL} master"
-  REVISION_COMMAND = "git log -l -1 --pretty=format:%H 2> /dev/null"
-  GIT_UP_TO_DATE   = "Already up-to-date."
-
-  formula_regexp   = 'Library/Formula/(.+?)\.rb'
-  ADDED_FORMULA    = %r{^\s+create mode \d+ #{formula_regexp}$}
-  UPDATED_FORMULA  = %r{^\s+#{formula_regexp}\s}
-  DELETED_FORMULA  = %r{^\s+delete mode \d+ #{formula_regexp}$}
-
-  example_regexp   = 'Library/Contributions/examples/([^.\s]+).*'
-  ADDED_EXAMPLE    = %r{^\s+create mode \d+ #{example_regexp}$}
-  UPDATED_EXAMPLE  = %r{^\s+#{example_regexp}}
-  DELETED_EXAMPLE  = %r{^\s+delete mode \d+ #{example_regexp}$}
-
-  attr_reader :added_formulae, :updated_formulae, :deleted_formulae, :initial_revision
-  attr_reader :added_examples, :updated_examples, :deleted_examples
-
-  def initialize
-    @added_formulae, @updated_formulae, @deleted_formulae = [], [], []
-    @added_examples, @updated_examples, @deleted_examples = [], [], []
-    @initial_revision = self.current_revision
-  end
-
-  # Performs an update of the homebrew source. Returns +true+ if a newer
-  # version was available, +false+ if already up-to-date.
-  def update_from_masterbrew!
-    output = ''
-    HOMEBREW_REPOSITORY.cd do
-      if File.directory? '.git'
-        safe_system CHECKOUT_COMMAND
-      else
-        safe_system INIT_COMMAND
-      end
-      output = execute(UPDATE_COMMAND)
-    end
-
-    output.split("\n").reverse.each do |line|
-      case line
-      when ADDED_FORMULA
-        @added_formulae << $1
-      when DELETED_FORMULA
-        @deleted_formulae << $1
-      when UPDATED_FORMULA
-        @updated_formulae << $1 unless @added_formulae.include?($1) or @deleted_formulae.include?($1)
-      when ADDED_EXAMPLE
-        @added_examples << $1
-      when DELETED_EXAMPLE
-        @deleted_examples << $1
-      when UPDATED_EXAMPLE
-        @updated_examples << $1 unless @added_examples.include?($1) or @deleted_examples.include?($1)
-      end
-    end
-    @added_formulae.sort!
-    @updated_formulae.sort!
-    @deleted_formulae.sort!
-    @added_examples.sort!
-    @updated_examples.sort!
-    @deleted_examples.sort!
-
-    output.strip != GIT_UP_TO_DATE
-  end
-
-  def pending_formulae_changes?
-    !@updated_formulae.empty?
-  end
-
-  def pending_new_formulae?
-    !@added_formulae.empty?
-  end
-
-  def deleted_formulae?
-    !@deleted_formulae.empty?
-  end
-
-  def pending_examples_changes?
-    !@updated_examples.empty?
-  end
-
-  def pending_new_examples?
-    !@added_examples.empty?
-  end
-
-  def deleted_examples?
-    !@deleted_examples.empty?
-  end
-
-  def current_revision
-    HOMEBREW_REPOSITORY.cd { execute(REVISION_COMMAND).strip }
-  rescue
-    'TAIL'
-  end
-
-  def report
-    puts "Updated Homebrew from #{initial_revision[0,8]} to #{current_revision[0,8]}."
-    ## New Formulae
-    if pending_new_formulae?
-      ohai "The following formulae are new:"
-      puts_columns added_formulae
-    end
-    ## Deleted Formulae
-    if deleted_formulae?
-      ohai "The following formulae were removed:"
-      puts_columns deleted_formulae
-    end
-    ## Updated Formulae
-    if pending_formulae_changes?
-      ohai "The following formulae were updated:"
-      puts_columns updated_formulae
-    else
-      puts "No formulae were updated."
-    end
-    ## New examples
-    if pending_new_examples?
-      ohai "The following external commands are new:"
-      puts_columns added_examples
-    end
-    ## Deleted examples
-    if deleted_examples?
-      ohai "The following external commands were removed:"
-      puts_columns deleted_examples
-    end
-    ## Updated Formulae
-    if pending_examples_changes?
-      ohai "The following external commands were updated:"
-      puts_columns updated_examples
-    else
-      puts "No external commands were updated."
-    end
-  end
-
-  private
-
-  def execute(cmd)
-    out = `#{cmd}`
-    if $? && !$?.success?
-      puts out
-      raise "Failed while executing #{cmd}"
-    end
-    ohai(cmd, out) if ARGV.verbose?
-    out
-  end
-end