From bea78dbfd6a70a81a38f0001b90c48d5ddcc8c28 Mon Sep 17 00:00:00 2001
From: Oleg Grenrus <oleg.grenrus@iki.fi>
Date: Wed, 19 Feb 2020 16:22:05 +0200
Subject: [PATCH] Make cabal-install build-type: Simple

---
 boot/ci-artifacts.template.yml       |  2 +-
 cabal-install/Setup.hs               | 64 +---------------------------
 cabal-install/cabal-install.cabal    |  9 +---
 cabal-install/cabal-install.cabal.pp | 14 ------
 4 files changed, 4 insertions(+), 85 deletions(-)

diff --git a/boot/ci-artifacts.template.yml b/boot/ci-artifacts.template.yml
index ec673f7c7e5..4ff11b2598a 100644
--- a/boot/ci-artifacts.template.yml
+++ b/boot/ci-artifacts.template.yml
@@ -124,7 +124,7 @@ jobs:
         shell: bash
         run: |
           cabal v2-build cabal-install:exe:cabal
-          cp dist-newstyle/build/x86_64-windows/ghc-8.6.5/cabal-install-3.3.0.0/build/cabal/cabal.exe cabal.exe
+          cp dist-newstyle/build/x86_64-windows/ghc-8.6.5/cabal-install-3.3.0.0/x/cabal/build/cabal/cabal.exe cabal.exe
       - name: Smoke test
         shell: bash
         run: |
diff --git a/cabal-install/Setup.hs b/cabal-install/Setup.hs
index 1d652abdb55..b55cb169539 100644
--- a/cabal-install/Setup.hs
+++ b/cabal-install/Setup.hs
@@ -1,63 +1,3 @@
-import Distribution.PackageDescription ( PackageDescription )
-import Distribution.Simple ( defaultMainWithHooks
-                           , simpleUserHooks
-                           , postBuild
-                           , postCopy
-                           , postInst
-                           )
-import Distribution.Simple.InstallDirs ( mandir
-                                       , CopyDest (NoCopyDest)
-                                       )
-import Distribution.Simple.LocalBuildInfo ( LocalBuildInfo(..)
-                                          , absoluteInstallDirs
-                                          )
-import Distribution.Simple.Utils ( installOrdinaryFiles
-                                 , notice )
-import Distribution.Simple.Setup ( buildVerbosity
-                                 , copyDest
-                                 , copyVerbosity
-                                 , fromFlag
-                                 , installVerbosity
-                                 )
-import Distribution.Verbosity ( Verbosity )
-
-import System.IO ( openFile
-                 , IOMode (WriteMode)
-                 )
-import System.Process ( runProcess )
-import System.FilePath ( (</>) )
-
--- WARNING to editors of this file:
--- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--- At this moment (Cabal 1.23), whatever you write here must be
--- compatible with ALL Cabal libraries which we support bootstrapping
--- with.  This is because pre-setup-depends versions of cabal-install will
--- build Setup.hs against the version of Cabal which MATCHES the library
--- that cabal-install was built against.  There is no way of overriding
--- this behavior without bumping the required 'cabal-version' in our
--- Cabal file.  Travis will let you know if we fail to install from
--- tarball!
-
+import Distribution.Simple
 main :: IO ()
-main = defaultMainWithHooks $ simpleUserHooks
-  { postBuild = \ _ flags _ lbi ->
-      buildManpage lbi (fromFlag $ buildVerbosity flags)
-  , postCopy = \ _ flags pkg lbi ->
-      installManpage pkg lbi (fromFlag $ copyVerbosity flags) (fromFlag $ copyDest flags)
-  , postInst = \ _ flags pkg lbi ->
-      installManpage pkg lbi (fromFlag $ installVerbosity flags) NoCopyDest
-  }
-
-buildManpage :: LocalBuildInfo -> Verbosity -> IO ()
-buildManpage lbi verbosity = do
-  let cabal = buildDir lbi </> "cabal/cabal"
-      manpage = buildDir lbi </> "cabal/cabal.1"
-  manpageHandle <- openFile manpage WriteMode
-  notice verbosity ("Generating manual page " ++ manpage ++ " ...")
-  _ <- runProcess cabal ["man","--raw"] Nothing Nothing Nothing (Just manpageHandle) Nothing
-  return ()
-
-installManpage :: PackageDescription -> LocalBuildInfo -> Verbosity -> CopyDest -> IO ()
-installManpage pkg lbi verbosity copy = do
-  let destDir = mandir (absoluteInstallDirs pkg lbi copy) </> "man1"
-  installOrdinaryFiles verbosity destDir [(buildDir lbi </> "cabal", "cabal.1")]
+main = defaultMain
diff --git a/cabal-install/cabal-install.cabal b/cabal-install/cabal-install.cabal
index 6cdb50e147d..8a85e482a95 100644
--- a/cabal-install/cabal-install.cabal
+++ b/cabal-install/cabal-install.cabal
@@ -18,7 +18,7 @@ Author:             Cabal Development Team (see AUTHORS file)
 Maintainer:         Cabal Development Team <cabal-devel@haskell.org>
 Copyright:          2003-2019, Cabal Development Team
 Category:           Distribution
-Build-type:         Custom
+Build-type:         Simple
 Extra-Source-Files:
   README.md bash-completion/cabal bootstrap.sh changelog
 
@@ -126,13 +126,6 @@ Flag lukko
   default:      True
   manual:       True
 
-custom-setup
-   setup-depends:
-       Cabal     >= 2.2,
-       base,
-       process   >= 1.1.0.1  && < 1.7,
-       filepath  >= 1.3      && < 1.5
-
 executable cabal
     main-is:        Main.hs
     hs-source-dirs: main
diff --git a/cabal-install/cabal-install.cabal.pp b/cabal-install/cabal-install.cabal.pp
index e05bf88f5f8..15546093db9 100644
--- a/cabal-install/cabal-install.cabal.pp
+++ b/cabal-install/cabal-install.cabal.pp
@@ -279,11 +279,7 @@
 Maintainer:         Cabal Development Team <cabal-devel@haskell.org>
 Copyright:          2003-2019, Cabal Development Team
 Category:           Distribution
-%if CABAL_FLAG_LIB
 Build-type:         Simple
-%else
-Build-type:         Custom
-%endif
 Extra-Source-Files:
   README.md bash-completion/cabal bootstrap.sh changelog
 
@@ -391,16 +387,6 @@
   default:      True
   manual:       True
 
-%if CABAL_FLAG_LIB
-%else
-custom-setup
-   setup-depends:
-       Cabal     >= 2.2,
-       base,
-       process   >= 1.1.0.1  && < 1.7,
-       filepath  >= 1.3      && < 1.5
-
-%endif
 #
 # Libraries, if CABAL_FLAG_LIB
 #