From 0d2011d04fd06fc6bb21407d2f412439668b6249 Mon Sep 17 00:00:00 2001
From: Daniel Gröber <dxld@darkboxed.org>
Date: Sat, 15 Dec 2018 23:18:41 +0100
Subject: Sync with Cabal HEAD

---
 src/CabalHelper/Compiletime/Compat/Parsec.hs | 41 ++++++++++++++++++++++++++++
 src/CabalHelper/Runtime/Compat.hs            | 25 ++++++++++++++---
 2 files changed, 62 insertions(+), 4 deletions(-)
 create mode 100644 src/CabalHelper/Compiletime/Compat/Parsec.hs

(limited to 'src')

diff --git a/src/CabalHelper/Compiletime/Compat/Parsec.hs b/src/CabalHelper/Compiletime/Compat/Parsec.hs
new file mode 100644
index 0000000..cab877a
--- /dev/null
+++ b/src/CabalHelper/Compiletime/Compat/Parsec.hs
@@ -0,0 +1,41 @@
+-- cabal-helper: Simple interface to Cabal's configuration state
+-- Copyright (C) 2018  Daniel Gröber <cabal-helper@dxld.at>
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU 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 General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+{-# LANGUAGE CPP #-}
+module CabalHelper.Compiletime.Compat.Parsec
+    ( absorbParsecFailure
+    , eitherParsec
+    ) where
+
+#if MIN_VERSION_Cabal(2,5,0)
+import Distribution.Parsec.Class
+#else
+import qualified Distribution.Compat.ReadP as Dist
+import Distribution.Text
+#endif
+
+absorbParsecFailure :: String -> Either String a -> a
+absorbParsecFailure _ (Right x) = x
+absorbParsecFailure ctx (Left err) =
+    error $ "Error parsing in '"++ctx++"': " ++ err
+
+#if !MIN_VERSION_Cabal(2,5,0)
+eitherParsec :: Text t => String -> Either String t
+eitherParsec i =
+  case filter ((=="") . snd) $ Dist.readP_to_S parse i of
+    (a,""):[] -> Right a
+    _ -> Left $ show i
+#endif
diff --git a/src/CabalHelper/Runtime/Compat.hs b/src/CabalHelper/Runtime/Compat.hs
index eb87163..21d4efd 100644
--- a/src/CabalHelper/Runtime/Compat.hs
+++ b/src/CabalHelper/Runtime/Compat.hs
@@ -133,6 +133,12 @@ import Distribution.Types.GenericPackageDescription
   )
 #endif
 
+#if CH_MIN_VERSION_Cabal(2,5,0)
+import Distribution.Types.LibraryName
+  ( LibraryName (..)
+  )
+#endif
+
 
 import CabalHelper.Shared.Common
 import CabalHelper.Shared.InterfaceTypes
@@ -150,9 +156,16 @@ type UnitId = InstalledPackageId
 
 
 componentNameToCh :: ComponentName -> ChComponentName
+#if CH_MIN_VERSION_Cabal(2,5,0)
+componentNameToCh (CLibName LMainLibName) = ChLibName ChMainLibName
+componentNameToCh (CLibName (LSubLibName n)) = ChLibName $ ChSubLibName (unUnqualComponentName' n)
+#elif CH_MIN_VERSION_Cabal(2,0,0)
 componentNameToCh CLibName = ChLibName ChMainLibName
-#if CH_MIN_VERSION_Cabal(2,0,0)
 componentNameToCh (CSubLibName n) = ChLibName $ ChSubLibName (unUnqualComponentName' n)
+#else
+componentNameToCh CLibName = ChLibName ChMainLibName
+#endif
+#if CH_MIN_VERSION_Cabal(2,0,0)
 componentNameToCh (CFLibName n) = ChFLibName (unUnqualComponentName' n)
 #endif
 componentNameToCh (CExeName n) = ChExeName (unUnqualComponentName' n)
@@ -171,14 +184,18 @@ unUnqualComponentName' = id
 
 
 componentNameFromComponent :: Component -> ComponentName
-#if !CH_MIN_VERSION_Cabal(1,25,0)
--- CPP < 1.25
-componentNameFromComponent (CLib Library {}) = CLibName
+#if CH_MIN_VERSION_Cabal(2,5,0)
+componentNameFromComponent (CLib Library { libName = Nothing }) = CLibName LMainLibName
+componentNameFromComponent (CLib Library { libName = Just n })  = CLibName $ LSubLibName n
+componentNameFromComponent (CFLib ForeignLib {..}) = CFLibName foreignLibName
 #elif CH_MIN_VERSION_Cabal(1,25,0)
 -- CPP >= 1.25 (redundant)
 componentNameFromComponent (CLib Library { libName = Nothing }) = CLibName
 componentNameFromComponent (CLib Library { libName = Just n })  = CSubLibName n
 componentNameFromComponent (CFLib ForeignLib {..}) = CFLibName foreignLibName
+#else
+-- CPP < 1.25
+componentNameFromComponent (CLib Library {}) = CLibName
 #endif
 componentNameFromComponent (CExe Executable {..}) = CExeName exeName
 componentNameFromComponent (CTest TestSuite {..}) = CTestName testName
-- 
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