From 71a3f4e8efa833cc1a8209ab336ac8c454cc2f9b Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Tue, 3 Aug 2021 15:44:49 +0200
Subject: env.nix -> shell.nix

---
 .gitignore    |  3 +++
 env.nix       | 50 --------------------------------------------------
 regfish.cabal | 26 ++++++++++++++++++++++++++
 regfish.nix   | 13 +++++++++++++
 shell.nix     | 44 ++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 86 insertions(+), 50 deletions(-)
 delete mode 100644 env.nix
 create mode 100644 regfish.cabal
 create mode 100644 regfish.nix
 create mode 100644 shell.nix

diff --git a/.gitignore b/.gitignore
index cd57d17..c42c311 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,7 @@
+/.bash_history
+/.ghci_history
 /.graveyard
+/.profile
 /state
 *.hi
 *.o
diff --git a/env.nix b/env.nix
deleted file mode 100644
index eef085c..0000000
--- a/env.nix
+++ /dev/null
@@ -1,50 +0,0 @@
-{ nixpkgs ? import <nixpkgs> {} }:
-
-let
-  pname = "regfish";
-  version = "2";
-
-  buildInputs = with pkgs; [
-    hsEnv
-  ];
-
-  extraCmds = with pkgs; ''
-    export MANPATH=$(ls -d $(echo "$PATH" | tr : \\n | sed -n 's:\(^/nix/store/[^/]\+\).*:\1/share/man:p') 2>/dev/null | tr \\n :)
-    $(grep export ${hsEnv.outPath}/bin/ghc)
-  '';
-
-  hsEnv = hsPkgs.ghcWithPackages (self: with self;
-    [
-      acid-state
-      cabal-install
-      HandsomeSoup
-      wreq
-    ]
-  );
-
-  hsPkgs = pkgs.haskellPackages.override {
-    overrides = self: super: with self; {
-    };
-  };
-
-  pkgs = nixpkgs // staticPkgs;
-  staticPkgs = with nixpkgs; {
-  };
-
-  #{{{ mkExports : set -> string
-  # Create shell script that exports a set's attributes.
-  mkExports = set: with builtins; with pkgs.lib.strings;
-    let
-      # XXX attribute names are not escaped, they have to be sane
-      # XXX the value should not contain <newline>
-      mkExport = k: "export ${k}=${escapeSh (getAttr k set)}";
-      escapeSh = stringAsChars (c: "\\${c}");
-    in
-      concatStringsSep "\n" (map mkExport (attrNames set));
-  #}}}
-
-in pkgs.myEnvFun {
-  name = "${pname}-${version}";
-  inherit buildInputs extraCmds;
-}
-# vim: set fdm=marker :
diff --git a/regfish.cabal b/regfish.cabal
new file mode 100644
index 0000000..87a8865
--- /dev/null
+++ b/regfish.cabal
@@ -0,0 +1,26 @@
+name: regfish
+version: 2.0.0
+license: MIT
+author: tv
+maintainer: tv <tv@krebsco.de>
+build-type: Simple
+cabal-version: >=1.10
+
+library
+  build-depends: base
+               , HandsomeSoup
+               , acid-state
+               , bytestring
+               , data-default
+               , http-client
+               , hxt
+               , lens
+               , mtl
+               , safecopy
+               , wreq
+  exposed-modules: Regfish
+                 , Regfish.AcidState
+                 , Regfish.Default
+                 , Regfish.Parser
+                 , Regfish.Types
+  ghc-options: -O2 -Wall
diff --git a/regfish.nix b/regfish.nix
new file mode 100644
index 0000000..d0be0c9
--- /dev/null
+++ b/regfish.nix
@@ -0,0 +1,13 @@
+{ mkDerivation, acid-state, base, bytestring, data-default
+, HandsomeSoup, http-client, hxt, lens, lib, mtl, safecopy, wreq
+}:
+mkDerivation {
+  pname = "regfish";
+  version = "2.0.0";
+  src = ./.;
+  libraryHaskellDepends = [
+    acid-state base bytestring data-default HandsomeSoup http-client
+    hxt lens mtl safecopy wreq
+  ];
+  license = lib.licenses.mit;
+}
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..4290cbb
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,44 @@
+{ nixpkgs ? import <nixpkgs> {}
+, compiler ? "default"
+, doBenchmark ? false
+}:
+
+let
+  # cabal2nix . > regfish.nix
+  packageFile = ./regfish.nix;
+
+  inherit (nixpkgs) lib pkgs;
+
+  haskellPackages = if compiler == "default"
+                       then pkgs.haskellPackages
+                       else pkgs.haskell.packages.${compiler};
+
+  hoogle =
+    haskellPackages.callPackage <nixpkgs/pkgs/development/haskell-modules/hoogle.nix> {
+      packages =
+        (haskellPackages.callPackage packageFile {
+          mkDerivation = pkgs.lib.id;
+        }).executableHaskellDepends;
+    };
+
+  variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id;
+
+  drv = variant (haskellPackages.callPackage packageFile {
+  });
+
+in
+
+  pkgs.lib.overrideDerivation drv.env (oldAttrs: {
+    buildInputs = [
+      pkgs.cabal-install
+    ];
+    shellHook = ''
+      cd ${lib.escapeShellArg (toString ./.)}
+      alias ghci='ghci -flocal-ghci-history -odir ~/tmp/regfish -hidir ~/tmp/regfish'
+      export HISTFILE=.bash_history HISTSIZE=100000
+
+      if test -e .profile; then
+        . ./.profile
+      fi
+    '';
+  })
-- 
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