enable bash completion

2 files changed, 8 insertions, 2 deletions

diff --git a/app/Main.hs b/app/Main.hs
index 87951b6..2e36d4c 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -98,7 +98,7 @@ showCommandParser :: O.Parser Command
 showCommandParser = Show <$> filesArg
 
 filesArg :: O.Parser [String]
-filesArg = O.many (O.strArgument (O.metavar "FILE"))
+filesArg = O.many (O.strArgument (O.metavar "FILE" <> O.action "file"))
 
 main :: IO ()
 main = do
diff --git a/default.nix b/default.nix
index 722d91c..1708430 100644
--- a/default.nix
+++ b/default.nix
@@ -7,7 +7,13 @@ let
 
   haskellPackages = pkgs.haskellPackages.override {
     overrides = self: super: {
-      anissue = super.callCabal2nix "anissue" ./. {};
+      anissue = (super.callCabal2nix "anissue" ./. { }).overrideAttrs (oldAttrs: {
+        postInstall = ''
+          exe=${oldAttrs.pname}
+          mkdir -p $out/share/bash-completion/completions
+          $out/bin/$exe --bash-completion-script $exe >$out/share/bash-completion/completions/$exe
+        '';
+      });
     };
   };