From ba379287c80e502e47664597370cef4b5593e417 Mon Sep 17 00:00:00 2001
From: akhesaCaro <caroline.gaudreau@gmail.com>
Date: Tue, 23 Mar 2021 14:09:49 +0100
Subject: [PATCH 1/4] reverting : removing DerivingVia extension (not
 compatible ghc < 8.6.1)

---
 doc/cookbook/uverb/UVerb.lhs | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/doc/cookbook/uverb/UVerb.lhs b/doc/cookbook/uverb/UVerb.lhs
index 2119706c..93147b68 100644
--- a/doc/cookbook/uverb/UVerb.lhs
+++ b/doc/cookbook/uverb/UVerb.lhs
@@ -10,6 +10,8 @@ handlers that respond with arbitrary open unions of types.
 {-# LANGUAGE ConstraintKinds #-}
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE DerivingStrategies #-}
+{-# LANGUAGE DerivingVia #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
@@ -154,12 +156,8 @@ Example usage:
 
 ```haskell
 data Foo = Foo Int Int Int
-  deriving (Show, Eq, GHC.Generic)
-
-instance ToJSON Foo
-
-instance HasStatus Foo where
-  type StatusOf Foo = 200
+  deriving (Show, Eq, GHC.Generic, ToJSON)
+  deriving HasStatus via WithStatus 200 Foo
 
 data Bar = Bar
   deriving (Show, Eq, GHC.Generic)

From d4f7b0397dae2466d1c6d4aeb4579c770dd61bd8 Mon Sep 17 00:00:00 2001
From: akhesaCaro <caroline.gaudreau@gmail.com>
Date: Tue, 23 Mar 2021 14:10:14 +0100
Subject: [PATCH 2/4] adding a compatibility warning in the cookbook

---
 doc/cookbook/uverb/UVerb.lhs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doc/cookbook/uverb/UVerb.lhs b/doc/cookbook/uverb/UVerb.lhs
index 93147b68..52566ca2 100644
--- a/doc/cookbook/uverb/UVerb.lhs
+++ b/doc/cookbook/uverb/UVerb.lhs
@@ -4,6 +4,10 @@ Servant allows you to talk about the exceptions you throw in your API
 types.  This is not limited to actual exceptions, you can write
 handlers that respond with arbitrary open unions of types.
 
+## Compatibility
+
+:warning: This cookbook is compatible with GHC 8.6.1 or higher :warning:
+
 ## Preliminaries
 
 ```haskell

From 81a73dfcdac23066d457c93fbfb0c788e2b7a344 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ga=C3=ABl=20Deest?= <gael.deest@tweag.io>
Date: Fri, 9 Apr 2021 15:56:59 +0200
Subject: [PATCH 3/4] Try excluding uverb cookbook from pre 8.6.1 builds

---
 doc/cookbook/uverb/uverb.cabal | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/doc/cookbook/uverb/uverb.cabal b/doc/cookbook/uverb/uverb.cabal
index 8b6b0b45..6c984070 100644
--- a/doc/cookbook/uverb/uverb.cabal
+++ b/doc/cookbook/uverb/uverb.cabal
@@ -28,6 +28,8 @@ executable cookbook-uverb
                      , swagger2
                      , wai
                      , warp
-  default-language:    Haskell2010
+  if impl(ghc < 8.6.1)
+        buildable: False
+  default-language: Haskell2010
   ghc-options:         -Wall -pgmL markdown-unlit
   build-tool-depends:  markdown-unlit:markdown-unlit

From f30b72cc902d17d8c6e17799d204f71e18bc8505 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ga=C3=ABl=20Deest?= <gael.deest@tweag.io>
Date: Fri, 9 Apr 2021 16:19:51 +0200
Subject: [PATCH 4/4] Add DeriveAnyClass to UVerb.lhs (not implied by
 DerivingVia on 8.6.5)

---
 doc/cookbook/uverb/UVerb.lhs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/cookbook/uverb/UVerb.lhs b/doc/cookbook/uverb/UVerb.lhs
index 52566ca2..cc771111 100644
--- a/doc/cookbook/uverb/UVerb.lhs
+++ b/doc/cookbook/uverb/UVerb.lhs
@@ -15,6 +15,7 @@ handlers that respond with arbitrary open unions of types.
 {-# LANGUAGE DataKinds #-}
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE DerivingStrategies #-}
+{-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DerivingVia #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE FlexibleInstances #-}