From 009ab8b6f86c9b869f3bcbdb9bb1f0bb9067bdec Mon Sep 17 00:00:00 2001
From: Andreas Abel <andreas.abel@ifi.lmu.de>
Date: Fri, 15 Dec 2023 17:10:33 +0100
Subject: [PATCH] hackage-security: import from tar-0.6 in a way compatible
 with tar-0.5

This requires importing constructors independent of their data
type (which changed from 0.5 to 0.6), via the `pattern` syntax.

Consequently, we drop GHC 7.6 which does not have `PatternSynonyms`.
---
 hackage-security/ChangeLog.md                              | 7 +++++++
 hackage-security/hackage-security.cabal                    | 7 ++++---
 .../src/Hackage/Security/Client/Repository/Cache.hs        | 2 +-
 3 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/hackage-security/ChangeLog.md b/hackage-security/ChangeLog.md
index a46b79f3..f5028d69 100644
--- a/hackage-security/ChangeLog.md
+++ b/hackage-security/ChangeLog.md
@@ -1,5 +1,12 @@
 See also http://pvp.haskell.org/faq
 
+0.6.2.4
+-------
+
+* Allow `tar-0.6`
+* Drop support for GHC < 7.8 in favor of `PatternSynonyms`
+* Tested with GHC 7.10 - 9.8
+
 0.6.2.3
 -------
 
diff --git a/hackage-security/hackage-security.cabal b/hackage-security/hackage-security.cabal
index 3088485f..bb9ea521 100644
--- a/hackage-security/hackage-security.cabal
+++ b/hackage-security/hackage-security.cabal
@@ -1,7 +1,6 @@
 cabal-version:       1.12
 name:                hackage-security
-version:             0.6.2.3
-x-revision:          9
+version:             0.6.2.4
 
 synopsis:            Hackage security library
 description:         The hackage security library provides both server and
@@ -127,7 +126,8 @@ library
                        Hackage.Security.Util.TypedEmbedded
                        MyPrelude
   -- We support ghc 7.4 (bundled with Cabal 1.14) and up
-  build-depends:       base              >= 4.5     && < 4.20,
+  build-depends:       base              >= 4.7     && < 4.20,
+                         -- PatternSynonyms are only available since GHC 7.8 (base 4.7)
                        base16-bytestring >= 0.1.1   && < 1.1,
                        base64-bytestring >= 1.0     && < 1.3,
                        bytestring        >= 0.9     && < 0.13,
@@ -185,6 +185,7 @@ library
                        NamedFieldPuns
                        NoImplicitPrelude
                        NoMonomorphismRestriction
+                       PatternSynonyms
                        RankNTypes
                        RecordWildCards
                        ScopedTypeVariables
diff --git a/hackage-security/src/Hackage/Security/Client/Repository/Cache.hs b/hackage-security/src/Hackage/Security/Client/Repository/Cache.hs
index 2b9f0287..f1e99f64 100644
--- a/hackage-security/src/Hackage/Security/Client/Repository/Cache.hs
+++ b/hackage-security/src/Hackage/Security/Client/Repository/Cache.hs
@@ -20,7 +20,7 @@ import Control.Exception
 import Control.Monad
 import Control.Monad.IO.Class
 import Data.Maybe
-import Codec.Archive.Tar (Entries(..))
+import Codec.Archive.Tar (Entries, pattern Done, pattern Fail, pattern Next)
 import Codec.Archive.Tar.Index (TarIndex, IndexBuilder, TarEntryOffset)
 import qualified Codec.Archive.Tar       as Tar
 import qualified Codec.Archive.Tar.Index as TarIndex