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authorGravatar Joey Hess <joey@kitenet.net>2010-11-28 15:28:20 -0400
committerGravatar Joey Hess <joey@kitenet.net>2010-11-28 15:28:20 -0400
commit653ad35a9f728ed5b3e9b557cdfb15a19b4afe16 (patch)
tree40e8ed2880ea291f33ef20e931b9d9d1d8c7189c /Utility.hs
parent92e5d28ca83d057a3d8f5d7d30806642de699172 (diff)
In .gitattributes, the git-annex-numcopies attribute can be used to control the number of copies to retain of different types of files.
Diffstat (limited to 'Utility.hs')
-rw-r--r--Utility.hs9
1 files changed, 8 insertions, 1 deletions
diff --git a/Utility.hs b/Utility.hs
index 2bea6e875..882492a2d 100644
--- a/Utility.hs
+++ b/Utility.hs
@@ -12,7 +12,8 @@ module Utility (
relPathDirToDir,
boolSystem,
shellEscape,
- unsetFileMode
+ unsetFileMode,
+ readMaybe
) where
import System.IO
@@ -125,3 +126,9 @@ unsetFileMode :: FilePath -> FileMode -> IO ()
unsetFileMode f m = do
s <- getFileStatus f
setFileMode f $ fileMode s `intersectFileModes` complement m
+
+{- Attempts to read a value from a String. -}
+readMaybe :: (Read a) => String -> Maybe a
+readMaybe s = case reads s of
+ ((x,_):_) -> Just x
+ _ -> Nothing