Upgrade nixpkgs to current master and add an upgrade checklist (#1579)

* simplify haskell packages overrides based on new nixpkgs * update Nix gitignore * simplify Haskell packages overlay Co-authored-by: monacoremo <monacoremo>
2020-09-09 19:08:16 -05:00
parent bd2160db26
commit 7af54c5813
12 changed files with 188 additions and 90 deletions
@@ -0,0 +1,31 @@
+{ compiler, extraOverrides ? (final: prev: { }) }:
+
+self: super:
+let
+  overrides =
+    final: prev:
+    rec {
+      # To pin custom versions of Haskell packages:
+      #   protolude =
+      #     prev.callHackageDirect
+      #       {
+      #         pkg = "protolude";
+      #         ver = "0.3.0";
+      #         sha256 = "0iwh4wsjhb7pms88lw1afhdal9f86nrrkkvv65f9wxbd1b159n72";
+      #       }
+      #       { };
+      #
+      # To get the sha256:
+      #   nix-prefetch-url --unpack https://hackage.haskell.org/package/protolude-0.3.0/protolude-0.3.0.tar.gz
+      protolude = prev.protolude_0_3_0;
+    } // extraOverrides final prev;
+in
+{
+  haskell =
+    super.haskell // {
+      packages = super.haskell.packages // {
+        "${compiler}" =
+          super.haskell.packages."${compiler}".override { inherit overrides; };
+      };
+    };
+}