From 900a378245d6853dbd08de065eb180fdf58e0388 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Merlin=20G=C3=B6ttlinger?= <megoettlinger@gmail.com>
Date: Thu, 19 Dec 2019 14:41:11 +0100
Subject: [PATCH] haskell: add quickjump option to the haskell mkDerivation

When visiting local documentation via hoogle, currently for most packages the
quickjump index is missing so you only get a sad error when pressing "s" to
search in the current documentation.

The quickjump option is only supported by the haddock utility that's shipped
with ghc 8.6.x or later.

Closes https://github.com/NixOS/nixpkgs/pull/75942.
---
 pkgs/development/haskell-modules/generic-builder.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 2ae33138696..5410fccf0bb 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -24,6 +24,7 @@ in
 , doCheck ? !isCross && stdenv.lib.versionOlder "7.4" ghc.version
 , doBenchmark ? false
 , doHoogle ? true
+, doHaddockQuickjump ? doHoogle && stdenv.lib.versionAtLeast ghc.version "8.6"
 , editedCabalFile ? null
 , enableLibraryProfiling ? !(ghc.isGhcjs or false)
 , enableExecutableProfiling ? false
@@ -402,6 +403,7 @@ stdenv.mkDerivation ({
     ${optionalString (doHaddock && isLibrary) ''
       ${setupCommand} haddock --html \
         ${optionalString doHoogle "--hoogle"} \
+        ${optionalString doHaddockQuickjump "--quickjump"} \
         ${optionalString (isLibrary && hyperlinkSource) "--hyperlink-source"} \
         ${stdenv.lib.concatStringsSep " " haddockFlags}
     ''}