From f8ad73b9d82fd71897535b60713cd74944648153 Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Tue, 3 Nov 2020 10:18:21 +0100
Subject: [PATCH] haskell.compiler.ghc8102BinaryMinimal: init

To stay within hydra limit of 2^31 output size on aarch64-linux
---
 .../compilers/ghc/8.10.2-binary.nix           | 26 +++++++++++++++++--
 pkgs/top-level/haskell-packages.nix           | 15 +++++++++--
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/compilers/ghc/8.10.2-binary.nix b/pkgs/development/compilers/ghc/8.10.2-binary.nix
index 37238bb13bda..cc9491ede240 100644
--- a/pkgs/development/compilers/ghc/8.10.2-binary.nix
+++ b/pkgs/development/compilers/ghc/8.10.2-binary.nix
@@ -2,6 +2,14 @@
 , fetchurl, perl, gcc
 , ncurses6, gmp, glibc, libiconv, numactl
 , llvmPackages
+
+  # minimal = true; will remove files that aren't strictly necessary for
+  # regular builds and GHC bootstrapping.
+  # This is "useful" for staying within hydra's output limits for at least the
+  # aarch64-linux architecture.
+  # Examples of unnecessary files are the bundled documentation and files that
+  # are only needed for profiling builds.
+, minimal ? false
 }:
 
 # Prebuilt only does native
@@ -172,6 +180,13 @@ stdenv.mkDerivation rec {
     for file in $(find "$out" -name setup-config); do
       substituteInPlace $file --replace /usr/bin/ranlib "$(type -P ranlib)"
     done
+  '' +
+  stdenv.lib.optionalString minimal ''
+    # Remove profiling objects
+    find $out -type f -name '*.p_o' -delete
+    rm $out/lib/ghc-*/bin/ghc-iserv-prof
+    # Remove docs
+    rm -r $out/share/{doc,man}
   '';
 
   doInstallCheck = true;
@@ -195,11 +210,18 @@ stdenv.mkDerivation rec {
     enableShared = true;
   };
 
-  meta = {
+  meta = let
+    platforms = ["x86_64-linux" "armv7l-linux" "aarch64-linux" "i686-linux" "x86_64-darwin"];
+  in {
     homepage = "http://haskell.org/ghc";
     description = "The Glasgow Haskell Compiler";
     license = stdenv.lib.licenses.bsd3;
-    platforms = ["x86_64-linux" "armv7l-linux" "aarch64-linux" "i686-linux" "x86_64-darwin"];
+
+    # The minimal variation can not be distributed because it removes the
+    # documentation, including licensing information that is required for
+    # distribution.
+    inherit platforms;
+    hydraPlatforms = stdenv.lib.optionals (!minimal) platforms;
     maintainers = with stdenv.lib.maintainers; [ lostnet ];
   };
 }
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 0db955c2ae48..da73a4a30518 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -54,6 +54,11 @@ in {
       llvmPackages = pkgs.llvmPackages_9;
     };
 
+    ghc8102BinaryMinimal = callPackage ../development/compilers/ghc/8.10.2-binary.nix {
+      llvmPackages = pkgs.llvmPackages_9;
+      minimal = true;
+    };
+
     ghc865 = callPackage ../development/compilers/ghc/8.6.5.nix {
       bootPkgs = packages.ghc822Binary;
       inherit (buildPackages.python3Packages) sphinx;
@@ -75,7 +80,7 @@ in {
     ghc884 = callPackage ../development/compilers/ghc/8.8.4.nix {
       # aarch64 ghc865Binary gets SEGVs due to haskell#15449 or similar
       bootPkgs = if stdenv.isAarch64 then
-          packages.ghc8102Binary
+          packages.ghc8102BinaryMinimal
         else
           packages.ghc865Binary;
       inherit (buildPackages.python3Packages) sphinx;
@@ -91,7 +96,7 @@ in {
     ghc8102 = callPackage ../development/compilers/ghc/8.10.2.nix {
       # aarch64 ghc865Binary gets SEGVs due to haskell#15449 or similar
       bootPkgs = if stdenv.isAarch64 then
-          packages.ghc8102Binary
+          packages.ghc8102BinaryMinimal
         else
           packages.ghc865Binary;
       inherit (buildPackages.python3Packages) sphinx;
@@ -164,6 +169,12 @@ in {
       compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-8.10.x.nix { };
       packageSetConfig = bootstrapPackageSet;
     };
+    ghc8102BinaryMinimal = callPackage ../development/haskell-modules {
+      buildHaskellPackages = bh.packages.ghc8102BinaryMinimal;
+      ghc = bh.compiler.ghc8102BinaryMinimal;
+      compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-8.10.x.nix { };
+      packageSetConfig = bootstrapPackageSet;
+    };
     ghc865 = callPackage ../development/haskell-modules {
       buildHaskellPackages = bh.packages.ghc865;
       ghc = bh.compiler.ghc865;