split out setEnv to avoid adding dep

Windows needs the setenv package in custom-setup, but I don't want to
pull it in on unix, which would probably break some builds and need more
work. Instead, split out setEnv to a separate module.

Quite likely, unix-compat will get a portable environment layer, and
then both modules can be removed from here.

This commit was sponsored by Øyvind Andersen Holm.

1 files changed, 1 insertions, 0 deletions

diff --git a/Git/Index.hs b/Git/Index.hs
index 85ea480b5..0898569b4 100644
--- a/Git/Index.hs
+++ b/Git/Index.hs
@@ -10,6 +10,7 @@ module Git.Index where
 import Common
 import Git
 import Utility.Env
+import Utility.Env.Set
 
 indexEnv :: String
 indexEnv = "GIT_INDEX_FILE"