src/Darcs/Repository/ApplyPatches.lhs

   1 %  Copyright (C) 2002-2005,2007 David Roundy
   2 %
   3 %  This program is free software; you can redistribute it and/or modify
   4 %  it under the terms of the GNU General Public License as published by
   5 %  the Free Software Foundation; either version 2, or (at your option)
   6 %  any later version.
   7 %
   8 %  This program is distributed in the hope that it will be useful,
   9 %  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 %  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 %  GNU General Public License for more details.
  12 %
  13 %  You should have received a copy of the GNU General Public License
  14 %  along with this program; see the file COPYING.  If not, write to
  15 %  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  16 %  Boston, MA 02110-1301, USA.
  17
  18 \begin{code}
  19 {-# OPTIONS_GHC -cpp #-}
  20 {-# LANGUAGE CPP #-}
  21
  22 #include "gadts.h"
  23
  24 module Darcs.Repository.ApplyPatches ( apply_patches, apply_patches_with_feedback ) where
  25
  26 import Darcs.Patch ( Patchy, apply )
  27 import Darcs.Hopefully ( PatchInfoAnd, hopefully, info )
  28 import Darcs.Patch.Info ( human_friendly )
  29 import Darcs.Ordered ( FL(..), lengthFL, mapFL )
  30 import Darcs.Flags ( DarcsFlag )
  31 import Darcs.Utils ( putDocLnError )
  32 import Darcs.Progress ( beginTedious, endTedious, tediousSize, finishedOneIO )
  33 import Printer ( text )
  34
  35 apply_patches_with_feedback :: Patchy p => [DarcsFlag] -> String -> FL (PatchInfoAnd p) C(x y) -> IO ()
  36 apply_patches_with_feedback _ _ NilFL = return ()
  37 apply_patches_with_feedback opts k patches =
  38     do beginTedious k
  39        tediousSize k (lengthFL patches)
  40        sequence_ $ mapFL apply_cautiously patches
  41        endTedious k
  42     where apply_cautiously :: Patchy p => PatchInfoAnd p C(a b) -> IO ()
  43           apply_cautiously hp =
  44              do finishedOneIO k (show $ human_friendly $ info hp)
  45                 apply opts (hopefully hp) `catch` \e ->
  46                   do putDocLnError $ text "Unapplicable patch:"
  47                      putDocLnError $ human_friendly (info hp)
  48                      ioError e
  49
  50 apply_patches :: Patchy p => [DarcsFlag] -> FL (PatchInfoAnd p) C(x y) -> IO ()
  51 apply_patches opts ps = apply_patches_with_feedback opts "Applying patch" ps
  52
  53 \end{code}