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.

7 files changed, 34 insertions, 40 deletions

diff --git a/Library/Homebrew/test/test_ENV.rb b/Library/Homebrew/test/test_ENV.rb
index 1cd716dfd..da3a9d6af 100644
--- a/Library/Homebrew/test/test_ENV.rb
+++ b/Library/Homebrew/test/test_ENV.rb
@@ -1,6 +1,5 @@
 require 'testing_env'
 require 'utils'
-require 'brew.h'
 require 'extend/ENV'
 ENV.extend(HomebrewEnvExtension)
   
diff --git a/Library/Homebrew/test/test_bucket.rb b/Library/Homebrew/test/test_bucket.rb
index 8492b4929..086297dd2 100644
--- a/Library/Homebrew/test/test_bucket.rb
+++ b/Library/Homebrew/test/test_bucket.rb
@@ -5,7 +5,6 @@ ARGV.extend(HomebrewArgvExtension)
 
 require 'test/testball'
 require 'utils'
-require 'brew.h'
 
 class MockFormula <Formula
   def initialize url
@@ -79,19 +78,24 @@ class BeerTasting < Test::Unit::TestCase
   # end
   
   def test_brew_h
+    require 'cmd/info'
+    require 'cmd/prune'
+    require 'cleaner'
+
     nostdout do
       assert_nothing_raised do
         f=TestBall.new
-        make f.url
-        info f
-        clean f
-        prune
+        Homebrew.info_formula f
+        Cleaner.new f
+        Homebrew.prune
         #TODO test diy function too
       end
     end
   end
 
   def test_brew_cleanup
+    require 'cmd/cleanup'
+
     f1=TestBall.new
     f1.instance_eval { @version = "0.1" }
     f2=TestBall.new
@@ -110,7 +114,7 @@ class BeerTasting < Test::Unit::TestCase
     assert f3.installed?
 
     nostdout do
-      cleanup f3
+      Homebrew.cleanup_formula f3
     end
 
     assert !f1.installed?
@@ -175,4 +179,16 @@ class BeerTasting < Test::Unit::TestCase
     assert_equal 'foo-0.1', foo1.stem
     assert_equal '0.1', foo1.version
   end
+
+  class MockMockFormula < Struct.new(:name); end
+
+  def test_formula_equality
+    f = MockFormula.new('http://example.com/test-0.1.tgz')
+    g = MockMockFormula.new('test')
+
+    assert f == f
+    assert f == g
+    assert f.eql? f
+    assert (not (f.eql? g))
+  end
 end
diff --git a/Library/Homebrew/test/test_external_deps.rb b/Library/Homebrew/test/test_external_deps.rb
index 2b96e7678..30b3540d9 100644
--- a/Library/Homebrew/test/test_external_deps.rb
+++ b/Library/Homebrew/test/test_external_deps.rb
@@ -3,38 +3,12 @@ require 'testing_env'
 require 'extend/ARGV' # needs to be after test/unit to avoid conflict with OptionsParser
 ARGV.extend(HomebrewArgvExtension)
 
+require 'extend/string'
 require 'test/testball'
 require 'formula_installer'
 require 'utils'
 
 
-# Custom formula installer that checks deps but does not
-# run the install code. We also override the external dep
-# install messages, so for instance the Python check doesnt
-# look for the pip formula (which isn't avaialble in test
-# mode.)
-class DontActuallyInstall < FormulaInstaller
-  def install_private f ; end
-  
-  def pyerr dep
-    "Python module install message."
-  end
-  
-  def plerr dep
-    "Perl module install message."
-  end
-  
-  def rberr dep
-    "Ruby module install message."
-  end
-
-  def jrberr dep
-    "JRuby module install message."
-  end
-end
-
-
-
 class BadPerlBall <TestBall
   depends_on "notapackage" => :perl
 
@@ -102,14 +76,14 @@ end
 
 class ExternalDepsTests < Test::Unit::TestCase
   def check_deps_fail f
-    assert_raises(RuntimeError) do
-      DontActuallyInstall.new.install f.new
+    assert_raises(UnsatisfiedExternalDependencyError) do
+      FormulaInstaller.check_external_deps f.new
     end
   end
 
   def check_deps_pass f
     assert_nothing_raised do
-      DontActuallyInstall.new.install f.new
+      FormulaInstaller.check_external_deps f.new
     end
   end
 
diff --git a/Library/Homebrew/test/test_formula.rb b/Library/Homebrew/test/test_formula.rb
index aa545f6d4..fd3987168 100644
--- a/Library/Homebrew/test/test_formula.rb
+++ b/Library/Homebrew/test/test_formula.rb
@@ -5,7 +5,6 @@ ARGV.extend(HomebrewArgvExtension)
 
 require 'test/testball'
 require 'utils'
-require 'brew.h'
 
 
 class MostlyAbstractFormula <Formula
diff --git a/Library/Homebrew/test/test_formula_install.rb b/Library/Homebrew/test/test_formula_install.rb
index db1a2b103..059d7656b 100644
--- a/Library/Homebrew/test/test_formula_install.rb
+++ b/Library/Homebrew/test/test_formula_install.rb
@@ -26,7 +26,7 @@ class ConfigureTests < Test::Unit::TestCase
     f=ConfigureFails.new
     begin
       f.brew { f.install }
-    rescue ExecutionError => e
+    rescue BuildError => e
       assert e.was_running_configure?
     end
   end
diff --git a/Library/Homebrew/test/test_updater.rb b/Library/Homebrew/test/test_updater.rb
index 1d733560b..5659f9c67 100644
--- a/Library/Homebrew/test/test_updater.rb
+++ b/Library/Homebrew/test/test_updater.rb
@@ -7,7 +7,7 @@ ARGV.extend(HomebrewArgvExtension)
 
 require 'formula'
 require 'utils'
-require 'update'
+require 'cmd/update'
 
 class RefreshBrewMock < RefreshBrew
   def in_prefix_expect(expect, returns = '')
diff --git a/Library/Homebrew/test/testing_env.rb b/Library/Homebrew/test/testing_env.rb
index ffc8b3003..0933185bb 100644
--- a/Library/Homebrew/test/testing_env.rb
+++ b/Library/Homebrew/test/testing_env.rb
@@ -8,6 +8,7 @@ ABS__FILE__=File.expand_path(__FILE__)
 
 $:.push(File.expand_path(__FILE__+'/../..'))
 require 'extend/pathname'
+require 'exceptions'
 
 # these are defined in global.rb, but we don't want to break our actual
 # homebrew tree, and we do want to test everything :)
@@ -26,4 +27,9 @@ at_exit { HOMEBREW_PREFIX.parent.rmtree }
 # Test fixtures and files can be found relative to this path
 TEST_FOLDER = Pathname.new(ABS__FILE__).parent.realpath
 
+require 'fileutils'
+module Homebrew extend self
+  include FileUtils
+end
+
 require 'test/unit' # must be after at_exit