Added annex.allowsign option.

This commit was sponsored by Ilya Shlyakhter on Patreon.

Config/CommitMode.hs

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+{- git-annex configuration
+ -
+ - Copyright 2019 Joey Hess <id@joeyh.name>
+ -
+ - Licensed under the GNU AGPL version 3 or higher.
+ -}
+
+module Config.CommitMode where
+
+import Annex.Common
+import qualified Annex
+import Git.Branch (CommitMode(..))
+
+implicitCommitMode :: Annex CommitMode
+implicitCommitMode = go . annexAllowSign <$> Annex.getGitConfig
+  where
+	go True = ManualCommit
+	go False = AutomaticCommit