Cabal build config

.gitignore

@@ -0,0 +1 @@
+dist-newstyle

cabal.project

@@ -0,0 +1,12 @@
+
+reject-unconstrained-dependencies: all
+index-state: 2020-04-10T22:25:18Z
+
+-- No repos listed, so hackage.haskell.org with the default root keys are used.
+--
+-- See https://github.com/haskell/cabal/blob/a07ef25229217a289433087c241d89e1c08e65e0/cabal-install/Distribution/Client/Config.hs#L654
+
+packages: ./iso-deriving.cabal
+
+package iso-deriving
+  optimization: False

cabal.project.freeze

@@ -0,0 +1,40 @@
+constraints: any.Cabal ==3.0.1.0,
+             any.StateVar ==1.2,
+             any.array ==0.5.4.0,
+             any.base ==4.13.0.0,
+             any.base-orphans ==0.8.2,
+             any.bifunctors ==5.5.7,
+             bifunctors +semigroups +tagged,
+             any.binary ==0.8.7.0,
+             any.bytestring ==0.10.10.0,
+             any.cabal-doctest ==1.0.8,
+             any.comonad ==5.0.6,
+             comonad +containers +distributive +test-doctests,
+             any.containers ==0.6.2.1,
+             any.contravariant ==1.5.2,
+             contravariant +semigroups +statevar +tagged,
+             any.deepseq ==1.4.4.0,
+             any.directory ==1.3.6.0,
+             any.distributive ==0.6.2,
+             distributive +semigroups +tagged,
+             any.filepath ==1.4.2.1,
+             any.ghc-boot-th ==8.8.3,
+             any.ghc-prim ==0.5.3,
+             any.integer-gmp ==1.0.2.0,
+             any.mtl ==2.2.2,
+             any.parsec ==3.1.14.0,
+             any.pretty ==1.1.3.6,
+             any.process ==1.6.8.0,
+             any.profunctors ==5.5.2,
+             any.rts ==1.0,
+             any.stm ==2.5.0.0,
+             any.tagged ==0.8.6,
+             tagged +deepseq +transformers,
+             any.template-haskell ==2.15.0.0,
+             any.text ==1.2.4.0,
+             any.th-abstraction ==0.3.2.0,
+             any.time ==1.9.3,
+             any.transformers ==0.5.6.2,
+             any.transformers-compat ==0.6.5,
+             transformers-compat -five +five-three -four +generic-deriving +mtl -three -two,
+             any.unix ==2.7.2.2

default.nix

@@ -11,9 +11,9 @@ let
   };
 
   pkgs = import (builtins.fetchTarball {
-    url = https://github.com/nixos/nixpkgs/archive/f74f2f354866c828248a419ef9a2cbddc793b7f9.tar.gz;
+    url = https://github.com/nixos/nixpkgs/archive/56f7c93a2fcd325506a6bfa7bf8e9faa2a2c7530.tar.gz;
     # Hash obtained using `nix-prefetch-url --unpack <url>`
-    sha256 = "1jxb2kb83mrmzg06l7c1zw9pikk2l1lpg8dl0rvni65bgmlxf7xy";
+    sha256 = "0fm9a24kjailx9qlyvwwa3a635m8pdk00329rldc541zhpmrklib";
   }) { config = opts; };
 in
 

iso-deriving.cabal

@@ -0,0 +1,51 @@
+
+name:                   iso-deriving
+version:                0.0.1
+author:                 Hans Hoeglund
+maintainer:             Hans Hoeglund <hans.hoeglund@tweag.io>
+license:                MIT
+license-file:           LICENSE
+synopsis:               A set of libraries for composition, analysis and manipulation of music.
+category:               Music
+tested-with:            GHC
+build-type:             Simple
+cabal-version:          >= 1.10
+
+description:
+    The GHC extension DerivingVia allow derivation through a specific
+    morphism: coerce. We present a library iso-deriving generalizing DerivingVia
+    to arbitrary morphisms. This is particularly useful for prototypes and
+    specifications of instances.
+
+extra-source-files:     README.md
+
+source-repository head
+    type:             	git
+    location:         	git://github.com/hanshoglund/iso-deriving.git
+
+library
+    build-depends:      base,
+                        profunctors
+
+    exposed-modules:    Iso.Deriving
+    hs-source-dirs:     .
+    default-language:   Haskell2010
+  ghc-options:
+    -Wall
+    -Wcompat
+    -Wincomplete-record-updates
+    -Wincomplete-uni-patterns
+    -Wredundant-constraints
+    -Wno-unused-top-binds
+    -Wno-name-shadowing
+    -Werror
+    -- TODO: Do not use -Werror by default for a library!
+
+test-suite "iso-deriving-tests"
+    build-depends:      base,
+                        mtl,
+                        iso-deriving
+    type:               exitcode-stdio-1.0
+    main-is:            Spec.hs
+    hs-source-dirs:     test
+    default-language:   Haskell2010