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@@ -51,6 +51,14 @@ END
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   # ----- Packaging -----
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   require 'rake/gempackagetask'
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+  require 'lib/haml'
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+
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+  # Before we run the package task,
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+  # we want to create a REVISION file
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+  # if we've checked out Haml from git
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+  # and we aren't building for a release.
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+  create_revision = Haml.version[:rev] && !Rake.application.top_level_tasks.include?('release')
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+  p create_revision
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   spec = Gem::Specification.new do |spec|
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     spec.name = 'haml'
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@@ -74,6 +82,7 @@ END
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       list.exclude('TODO')
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     end.to_a
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     spec.executables = ['haml', 'html2haml', 'sass', 'css2sass']
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+    readmes << 'REVISION' if create_revision
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     spec.files = FileList['lib/**/*', 'bin/*', 'test/**/*', 'Rakefile', 'init.rb'].to_a + readmes
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     spec.autorequire = ['haml', 'sass']
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     spec.homepage = 'http://haml.hamptoncatlin.com/'
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@@ -95,6 +104,15 @@ END
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     pkg.need_tar_bz2 = true
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   end
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+  desc "This is an internal task."
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+  task :revision_file do
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+    File.open('REVISION', 'w') { |f| f.puts Haml.version[:rev] } if create_revision
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+  end
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+  Rake::Task[:package].prerequisites.insert(0, :revision_file)
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+
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+  # We also need to get rid of this file after packaging.
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+  Rake::Task[:package].enhance { File.delete('REVISION') if File.exists?('REVISION') }
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+
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   task :install => [:package] do
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     sh %{gem install --no-ri pkg/haml-#{File.read('VERSION').strip}}
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   end

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@@ -895,12 +895,16 @@ module Haml
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     }
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     @@version[:string] = [:major, :minor, :teeny].map { |comp| @@version[comp] }.compact.join('.')
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-    if File.exists?(scope('.git/HEAD'))
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+    if File.exists?(scope('REVISION'))
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+      rev = File.read(scope('REVISION')).strip
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+    elsif File.exists?(scope('.git/HEAD'))
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       rev = File.read(scope('.git/HEAD')).strip
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       if rev =~ /^ref: (.*)$/
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         rev = File.read(scope(".git/#{$1}")).strip
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       end
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+    end
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+    if rev
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       @@version[:rev] = rev
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       @@version[:string] << "." << rev[0...7]
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     end