Allow satisfied? to be specified in a block

Instead of overriding #satisfied?, Requirement subclasses can specify
the condition in a block:

  satisfy do
    some_condition?
  end

The contents of the block are evaluated in the context of the instance,
and so have access to instance variables and instance methods as before.
Additionally, it is wrapped in an ENV.with_build_environment block. This
can be disabled by passing :build_env => false to satisfy:

  satisfy :build_env => false do
    some_condition?
  end

1 files changed, 5 insertions, 1 deletions

diff --git a/Library/Homebrew/test/testing_env.rb b/Library/Homebrew/test/testing_env.rb
index 2380400ea..7206a71f0 100644
--- a/Library/Homebrew/test/testing_env.rb
+++ b/Library/Homebrew/test/testing_env.rb
@@ -31,7 +31,11 @@ MACOS = true
 MACOS_VERSION = 10.6
 MACOS_FULL_VERSION = '10.6.8'
 
-(HOMEBREW_PREFIX+'Library/Formula').mkpath
+%w{Library/Formula Library/ENV}.each do |d|
+  HOMEBREW_REPOSITORY.join(d).mkpath
+end
+
+ORIGINAL_PATHS = ENV['PATH'].split(':').map{ |p| Pathname.new(p).expand_path rescue nil }.compact.freeze
 
 at_exit { HOMEBREW_PREFIX.parent.rmtree }