ApplyPatches.lhs

%  Copyright (C) 2002-2005,2007 David Roundy
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\begin{code}
{-# OPTIONS_GHC -cpp #-}
#include "gadts.h"
module Darcs.Repository.ApplyPatches ( apply_patches, apply_patches_with_feedback ) where

import Darcs.Patch ( Patchy, apply )
import Darcs.Hopefully ( PatchInfoAnd, hopefully, info )
import Darcs.Patch.Info ( human_friendly )
import Darcs.Patch.Ordered ( FL(..), lengthFL, mapFL )
import Darcs.Flags ( DarcsFlag )
import Darcs.Utils ( putDocLnError )
import Darcs.Progress ( beginTedious, endTedious, tediousSize, finishedOneIO )
import Printer ( text )

apply_patches_with_feedback :: Patchy p => [DarcsFlag] -> String -> FL (PatchInfoAnd p) C(x y) -> IO ()
apply_patches_with_feedback _ _ NilFL = return ()
apply_patches_with_feedback opts k patches =
    do beginTedious k
       tediousSize k (lengthFL patches)
       sequence_ $ mapFL apply_cautiously patches
       endTedious k
    where apply_cautiously :: Patchy p => PatchInfoAnd p C(a b) -> IO ()
          apply_cautiously hp =
             do finishedOneIO k (show $ human_friendly $ info hp)
                apply opts (hopefully hp) `catch` \e ->
                  do putDocLnError $ text "Unapplicable patch:"
                     putDocLnError $ human_friendly (info hp)
                     ioError e

apply_patches :: Patchy p => [DarcsFlag] -> FL (PatchInfoAnd p) C(x y) -> IO ()
apply_patches opts ps = apply_patches_with_feedback opts "Applying patch" ps

\end{code}