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Diffstat (limited to 'Utility.hs')
| -rw-r--r-- | Utility.hs | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/Utility.hs b/Utility.hs index b5c0dd617..90494a0c4 100644 --- a/Utility.hs +++ b/Utility.hs @@ -1,6 +1,6 @@ {- git-annex utility functions - - - Copyright 2010 Joey Hess <joey@kitenet.net> + - Copyright 2010-2011 Joey Hess <joey@kitenet.net> - - Licensed under the GNU GPL version 3 or higher. -} @@ -50,16 +50,17 @@ import Control.Monad (liftM2) data ShellParam = Params String | Param String | File FilePath deriving (Eq, Show, Ord) -{- When converting ShellParam to a String in preparation for passing to - - a shell command, Files that start with a dash are modified to avoid - - the shell command interpreting them as options. -} +{- Used to pass a list of ShellParams to a function that runs + - a shell command and expects Strings. -} toShell :: [ShellParam] -> [String] toShell l = concat $ map unwrap l where unwrap (Param s) = [s] unwrap (Params s) = filter (not . null) (split " " s) + -- Files that start with a dash are modified to avoid + -- the shell command interpreting them as options. unwrap (File ('-':s)) = ["./-" ++ s] - unwrap (File (s)) = [s] + unwrap (File s) = [s] {- Run a system command, and returns True or False - if it succeeded or failed. |