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diff --git a/CabalHelper/Types.hs b/CabalHelper/Types.hs
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+-- cabal-helper: Simple interface to Cabal's configuration state
+-- Copyright (C) 2015  Daniel Gröber <dxld ÄT darkboxed DOT org>
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU Affero General Public License for more details.
+--
+-- You should have received a copy of the GNU Affero General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+module CabalHelper.Types where
+
+newtype ChModuleName = ChModuleName String
+    deriving (Eq, Ord, Read, Show)
+
+data ChComponentName = ChSetupHsName
+                     | ChLibName
+                     | ChExeName String
+                     | ChTestName String
+                     | ChBenchName String
+  deriving (Eq, Ord, Read, Show)
+
+data Response
+    = ResponseStrings    [(ChComponentName, [String])]
+    | ResponseEntrypoints [(ChComponentName, ChEntrypoint)]
+    | ResponseLbi String
+  deriving (Eq, Ord, Read, Show)
+
+data ChEntrypoint = ChExeEntrypoint { chMainIs         :: FilePath
+                                    , chOtherModules   :: [ChModuleName]
+                                    }
+                  | ChLibentrypoint { chExposedModules :: [ChModuleName]
+                                    , chOtherModules   :: [ChModuleName]
+                                    } deriving (Eq, Ord, Read, Show)