Default to non-interactive init.

cabal-install/Distribution/Client/Config.hs

@@ -822,7 +822,7 @@ commentSavedConfig = do
             globalRemoteRepos = toNubList [defaultRemoteRepo]
             },
         savedInitFlags       = mempty {
-            IT.interactive     = toFlag True,
+            IT.interactive     = toFlag False,
             IT.cabalVersion    = toFlag (mkVersion [1,10]),
             IT.language        = toFlag Haskell2010,
             IT.license         = toFlag BSD3,

cabal-install/Distribution/Client/Init.hs

@@ -696,8 +696,8 @@ eligibleForTestSuite flags =
 maybePrompt :: InitFlags -> IO t -> IO (Maybe t)
 maybePrompt flags p =
   case interactive flags of
-    Flag False -> return Nothing
-    _          -> Just `fmap` p
+    Flag True -> Just `fmap` p
+    _         -> return Nothing
 
 -- | Create a prompt with optional default value that returns a
 --   String.

cabal-install/Distribution/Client/Setup.hs

@@ -2230,17 +2230,17 @@ defaultInitFlags  = emptyInitFlags { IT.initVerbosity = toFlag normal }
 initCommand :: CommandUI IT.InitFlags
 initCommand = CommandUI {
     commandName = "init",
-    commandSynopsis = "Create a new .cabal package file (interactively).",
+    commandSynopsis = "Create a new .cabal package file.",
     commandDescription = Just $ \_ -> wrapText $
-         "Cabalise a project by creating a .cabal, Setup.hs, and "
-      ++ "optionally a LICENSE file.\n"
+         "Create a .cabal, Setup.hs, and optionally a LICENSE file.\n"
       ++ "\n"
-      ++ "Calling init with no arguments (recommended) uses an "
-      ++ "interactive mode, which will try to guess as much as "
-      ++ "possible and prompt you for the rest.  Command-line "
-      ++ "arguments are provided for scripting purposes. "
-      ++ "If you don't want interactive mode, be sure to pass "
-      ++ "the -n flag.\n",
+      ++ "Calling init with no arguments creates an executable, "
+      ++ "guessing as many options as possible. The interactive "
+      ++ "mode can be invoked by the -i/--interactive flag, which "
+      ++ "will try to guess as much as possible and prompt you for "
+      ++ "the rest. You can change init to always be interactive by "
+      ++ "setting the interactive flag in your configuration file. "
+      ++ "Command-line arguments are provided for scripting purposes.\n",
     commandNotes = Nothing,
     commandUsage = \pname ->
          "Usage: " ++ pname ++ " init [FLAGS]\n",

cabal-install/changelog

@@ -39,6 +39,7 @@
 	  that make it possible to copy the executable instead of symlinking it
 	* --symlink-bindir no longer controls the symlinking directory of
 	  v2-install (installdir controls both symlinking and copying now)
+	* Default to non-interactive init.
 	* Add --test-wrapper that allows a prebuild script to set the test environment.
 	* Add filterTestFlags: filter test-wrapper for Cabal < 3.0.0.
 	* Cabal now only builds the minimum of a package for `v2-install` (#5754, #6091)