From 30e7c659552f7237a1cb9d159dee9d0e8b68dcc8 Mon Sep 17 00:00:00 2001
From: "Yann Esposito (Yogsototh)" <yann.esposito@gmail.com>
Date: Wed, 3 Apr 2019 22:36:17 +0200
Subject: [PATCH] nix env for reproductible devenv and build

---
 .envrc                    |  1 +
 aggreact.cabal            |  7 ++++---
 nix/nixpkgs.json          |  7 +++++++
 nix/nixpkgs.nix           | 10 ++++++++++
 nix/update-nixpkgs-dev.sh |  4 ++++
 nix/update-nixpkgs.sh     |  5 +++++
 shell.nix                 | 12 ++++++++++++
 7 files changed, 43 insertions(+), 3 deletions(-)
 create mode 100644 .envrc
 create mode 100644 nix/nixpkgs.json
 create mode 100644 nix/nixpkgs.nix
 create mode 100755 nix/update-nixpkgs-dev.sh
 create mode 100755 nix/update-nixpkgs.sh
 create mode 100644 shell.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..4a4726a
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use_nix
diff --git a/aggreact.cabal b/aggreact.cabal
index c223022..3e24a61 100644
--- a/aggreact.cabal
+++ b/aggreact.cabal
@@ -1,8 +1,10 @@
--- This file has been generated from package.yaml by hpack version 0.28.2.
+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.31.2.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 2c0743c70d80e2ac0827c17be0cfb1ca6bfd0a613a186d520ce3faeddd522550
+-- hash: cd60f98ce5adc1993e4769824e33298d5d80b96bd03e156d69698fae38f4ef5c
 
 name:           aggreact
 version:        0.1.0.0
@@ -16,7 +18,6 @@ copyright:      © 2018 Yann Esposito
 license:        ISC
 license-file:   LICENSE
 build-type:     Simple
-cabal-version:  >= 1.10
 extra-source-files:
     README.md
     stack.yaml
diff --git a/nix/nixpkgs.json b/nix/nixpkgs.json
new file mode 100644
index 0000000..a4d28eb
--- /dev/null
+++ b/nix/nixpkgs.json
@@ -0,0 +1,7 @@
+{
+  "url": "https://github.com/nixos/nixpkgs.git",
+  "rev": "e03966a60f517700f5fee5182a5a798f8d0709df",
+  "date": "2019-04-03T21:17:44+02:00",
+  "sha256": "1jwgzfnjgfcr67c7nz8hkw4a13qa296bv5cr6m36pfydw27aqdas",
+  "fetchSubmodules": false
+}
diff --git a/nix/nixpkgs.nix b/nix/nixpkgs.nix
new file mode 100644
index 0000000..b650ce0
--- /dev/null
+++ b/nix/nixpkgs.nix
@@ -0,0 +1,10 @@
+{ }:
+let
+  hostpkgs = import <nixpkgs> {};
+  srcDef = builtins.fromJSON (builtins.readFile ./nixpkgs.json);
+  nixpkgs = hostpkgs.fetchFromGitHub {
+    owner = "NixOS";
+    repo = "nixpkgs";
+    inherit (srcDef) rev sha256;
+  };
+in import nixpkgs { }
diff --git a/nix/update-nixpkgs-dev.sh b/nix/update-nixpkgs-dev.sh
new file mode 100755
index 0000000..c290649
--- /dev/null
+++ b/nix/update-nixpkgs-dev.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p nix-prefetch-git
+
+nix-prefetch-git https://github.com/nixos/nixpkgs.git > ./nix/nixpkgs.json
diff --git a/nix/update-nixpkgs.sh b/nix/update-nixpkgs.sh
new file mode 100755
index 0000000..0bb858a
--- /dev/null
+++ b/nix/update-nixpkgs.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p nix-prefetch-git
+
+nix-prefetch-git https://github.com/nixos/nixpkgs-channels.git \
+                 --rev refs/heads/nixos-unstable > ./nix/nixpkgs.json
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..ef48ca1
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,12 @@
+with import nix/nixpkgs.nix {};
+
+mkShell {
+  name = "aggreact";
+  buildInputs = [ gnupg
+                  haskellPackages.stack
+                  haskellPackages.ghcid
+                ];
+  LC_ALL = "en_US.UTF-8";
+  LANG = "en_US.UTF-8";
+  TMPDIR = "/tmp";
+}