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@@ -100,14 +100,24 @@
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   # Detect a repo type and open it.
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   def RCSetta::open(path)
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     epath = File.expand_path path
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+    RCSetta::search_up epath.split(/\//)
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+  end
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-    driver = SCM_DRIVERS.detect{|p, c| File.exist?(File.join(epath, p))}
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+  private
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+
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+  # Look upwards until we find something we understand, or we can't go up any
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+  # further.
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+  def RCSetta::search_up(paths)
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+    raise "Cannot detect repo type from #{path}" if paths.empty?
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+    path=paths.join '/'
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+    driver = SCM_DRIVERS.detect{|p, c| File.exist?(File.join(path, p))}
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     if driver
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-      driver.last.new epath
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+      driver.last.new path
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     else
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-      raise "Cannot detect repo type from #{path}"
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+      RCSetta::search_up(paths[0..-2])
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     end
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   end
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+
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 end