ghc-pkg does not have to depend on terminfo

utils/ghc-pkg/Main.hs

@@ -10,13 +10,6 @@
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 
--- We never want to link against terminfo while bootstrapping.
-#if defined(BOOTSTRAPPING)
-#if defined(WITH_TERMINFO)
-#undef WITH_TERMINFO
-#endif
-#endif
-
 -- Fine if this comes from make/Hadrian or the pre-built base.
 #include <ghcplatform.h>
 
@@ -100,10 +93,6 @@ import System.Posix hiding (fdToHandle)
 import qualified System.Info(os)
 #endif
 
-#if defined(WITH_TERMINFO)
-import System.Console.Terminfo as Terminfo
-#endif
-
 #if defined(mingw32_HOST_OS)
 # if defined(i386_HOST_ARCH)
 #  define WINDOWS_CCONV stdcall
@@ -1582,37 +1571,28 @@ listPackages verbosity my_flags mPackageName mModuleName = do
 
   if simple_output then show_simple stack else do
 
-#if !defined(WITH_TERMINFO)
+#if defined(mingw32_HOST_OS)
     mapM_ show_normal stack
 #else
     let
-       show_colour withF db@PackageDB{ packages = pkg_confs } =
-           if null pkg_confs
-           then termText (location db) <#> termText "\n    (no packages)\n"
-           else
-               mconcat $ map (<#> termText "\n") $
-                           (termText (location db)
-                            : map (termText "    " <#>) (map pp_pkg pkg_confs))
-          where
-                   pp_pkg p
-                     | installedUnitId p `elem` broken = withF Red  doc
-                     | exposed p                       = doc
-                     | otherwise                       = withF Blue doc
-                     where doc | verbosity >= Verbose
-                               = termText (printf "%s (%s)" pkg (display (installedUnitId p)))
-                               | otherwise
-                               = termText pkg
-                            where
-                            pkg = display (mungedId p)
+      show_colour PackageDB{ location = db_name, packages = pkg_confs } =
+          do hPutStrLn stdout db_name
+             if null pkg_confs
+                 then hPutStrLn stdout "    (no packages)"
+                 else hPutStrLn stdout $ unlines (map ("    " ++) (map pp_pkg pkg_confs))
+           where
+                 pp_pkg p
+                   | installedUnitId p `elem` broken = printf "\ESC[31m%s\ESC[0m" doc -- red color
+                   | exposed p = doc
+                   | otherwise = printf "\ESC[34m%s\ESC[0m" doc -- blue color
+                   where doc | verbosity >= Verbose = printf "%s (%s)" pkg (display (installedUnitId p))
+                             | otherwise            = pkg
+                          where
+                          pkg = display (mungedId p)
 
     is_tty <- hIsTerminalDevice stdout
-    if not is_tty
-       then mapM_ show_normal stack
-       else do tty <- Terminfo.setupTermFromEnv
-               case Terminfo.getCapability tty withForegroundColor of
-                   Nothing -> mapM_ show_normal stack
-                   Just w  -> runTermOutput tty $ mconcat $
-                                                  map (show_colour w) stack
+    -- Coloured text is a part of ANSI standard, no reason to query terminfo
+    mapM_ (if is_tty then show_colour else show_normal) stack
 #endif
 
 simplePackageList :: [Flag] -> [InstalledPackageInfo] -> IO ()

utils/ghc-pkg/ghc-pkg.cabal.in

@@ -15,11 +15,6 @@ Category: Development
 build-type: Simple
 cabal-version: >=1.10
 
-Flag terminfo
-    Description: Build GHC with terminfo support on non-Windows platforms.
-    Default: True
-    Manual: False
-
 Executable ghc-pkg
     Default-Language: Haskell2010
     Main-Is: Main.hs
@@ -35,9 +30,6 @@ Executable ghc-pkg
                    binary,
                    ghc-boot,
                    bytestring
-    if !os(windows) && flag(terminfo)
-        Build-Depends: terminfo
-        Cpp-Options: -DWITH_TERMINFO
     if !os(windows)
         Build-Depends: unix
     if os(windows)