merge from git-annex and relicense accordingly

Merge git library and utility from git-annex. The former is now relicensed
AGPL, so git-repair as a whole becomes AGPL.

For simplicity, I am relicensing the remainder of the code in git-repair
AGPL as well, per the header changes in this commit. While that code is
also technically available under the GPL license, as it's been released
under that license before, changes going forward will be only released by
me under the AGPL.

1 files changed, 28 insertions, 10 deletions

diff --git a/Utility/SafeCommand.hs b/Utility/SafeCommand.hs
index eb34d3d..19d5f20 100644
--- a/Utility/SafeCommand.hs
+++ b/Utility/SafeCommand.hs
@@ -7,7 +7,23 @@
 
 {-# OPTIONS_GHC -fno-warn-tabs #-}
 
-module Utility.SafeCommand where
+module Utility.SafeCommand (
+	CommandParam(..),
+	toCommand,
+	boolSystem,
+	boolSystem',
+	boolSystemEnv,
+	safeSystem,
+	safeSystem',
+	safeSystemEnv,
+	shellWrap,
+	shellEscape,
+	shellUnEscape,
+	segmentXargsOrdered,
+	segmentXargsUnordered,
+	prop_isomorphic_shellEscape,
+	prop_isomorphic_shellEscape_multiword,
+) where
 
 import System.Exit
 import Utility.Process
@@ -27,19 +43,21 @@ data CommandParam
 -- | Used to pass a list of CommandParams to a function that runs
 -- a command and expects Strings. -}
 toCommand :: [CommandParam] -> [String]
-toCommand = map unwrap
+toCommand = map toCommand'
+
+toCommand' :: CommandParam -> String
+toCommand' (Param s) = s
+-- Files that start with a non-alphanumeric that is not a path
+-- separator are modified to avoid the command interpreting them as
+-- options or other special constructs.
+toCommand' (File s@(h:_))
+	| isAlphaNum h || h `elem` pathseps = s
+	| otherwise = "./" ++ s
   where
-	unwrap (Param s) = s
-	-- Files that start with a non-alphanumeric that is not a path
-	-- separator are modified to avoid the command interpreting them as
-	-- options or other special constructs.
-	unwrap (File s@(h:_))
-		| isAlphaNum h || h `elem` pathseps = s
-		| otherwise = "./" ++ s
-	unwrap (File s) = s
 	-- '/' is explicitly included because it's an alternative
 	-- path separator on Windows.
 	pathseps = pathSeparator:"./"
+toCommand' (File s) = s
 
 -- | Run a system command, and returns True or False if it succeeded or failed.
 --