added project with nix

src/posts/0010-Haskell-Now/project/.envrc

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+use nix

src/posts/0010-Haskell-Now/project/.gitignore

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+dist-newstyle/
+result

src/posts/0010-Haskell-Now/project/CHANGELOG.md

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+# Revision history for project
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.

src/posts/0010-Haskell-Now/project/LICENSE

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+Copyright (c) 2019, Yann Esposito (Yogsototh)
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Yann Esposito (Yogsototh) nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

src/posts/0010-Haskell-Now/project/Setup.hs

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+import Distribution.Simple
+main = defaultMain

src/posts/0010-Haskell-Now/project/app/Main.hs

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+module Main where
+
+import qualified MyLib (someFunc)
+
+main :: IO ()
+main = do
+  putStrLn "Hello, Haskell!"
+  MyLib.someFunc

src/posts/0010-Haskell-Now/project/default.nix

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+{ nixpkgs ? import ./nixpkgs.nix
+, compiler ? "default"
+, doBenchmark ? false }:
+let
+  inherit (nixpkgs) pkgs;
+  name = "project";
+  haskellPackages = pkgs.haskellPackages;
+  variant = if doBenchmark
+            then pkgs.haskell.lib.doBenchmark
+            else pkgs.lib.id;
+  drv = haskellPackages.callCabal2nix name ./. {};
+in
+{
+  my_project = drv;
+  shell = haskellPackages.shellFor {
+    # generate hoogle doc
+    withHoogle = true;
+    packages = p: [drv];
+    # packages dependencies (by default haskellPackages)
+    buildInputs = with haskellPackages;
+      [ hlint
+        ghcid
+        cabal-install
+        cabal2nix
+        hindent
+      ];
+    # nice prompt for the nix-shell
+    shellHook = ''
+     export PS1="\n[${name}:\033[1;32m\]\W\[\033[0m\]]> "
+  '';
+  };
+}

src/posts/0010-Haskell-Now/project/nixpkgs.nix

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+import (fetchTarball https://github.com/NixOS/nixpkgs/archive/19.09.tar.gz) {}

src/posts/0010-Haskell-Now/project/project.cabal

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+cabal-version:       2.4
+
+-- Initial package description 'project.cabal' generated by 'cabal init'.
+-- For further documentation, see http://haskell.org/cabal/users-guide/
+
+-- The name of the package.
+name:                project
+
+-- The package version.  See the Haskell package versioning policy (PVP)
+-- for standards guiding when and how versions should be incremented.
+-- https://pvp.haskell.org
+-- PVP summary:      +-+------- breaking API changes
+--                   | | +----- non-breaking API additions
+--                   | | | +--- code changes with no API change
+version:             0.1.0.0
+
+-- A short (one-line) description of the package.
+-- synopsis:
+
+-- A longer description of the package.
+-- description:
+
+-- A URL where users can report bugs.
+-- bug-reports:
+
+-- The license under which the package is released.
+license:             BSD-3-Clause
+
+-- The file containing the license text.
+license-file:        LICENSE
+
+-- The package author(s).
+author:              Yann Esposito (Yogsototh)
+
+-- An email address to which users can send suggestions, bug reports, and
+-- patches.
+maintainer:          yann.esposito@gmail.com
+
+-- A copyright notice.
+-- copyright:
+
+-- category:
+
+-- Extra files to be distributed with the package, such as examples or a
+-- README.
+extra-source-files:  CHANGELOG.md
+
+
+library
+  -- Modules exported by the library.
+  exposed-modules:     MyLib
+
+  -- Modules included in this library but not exported.
+  -- other-modules:
+
+  -- LANGUAGE extensions used by modules in this package.
+  other-extensions:    NoImplicitPrelude
+
+  -- Other library packages from which modules are imported.
+  build-depends:       base ^>=4.12.0.0,
+                       protolude
+
+  -- Directories containing source files.
+  hs-source-dirs:      src
+
+  -- Base language which the package is written in.
+  default-language:    Haskell2010
+
+
+executable project
+  -- .hs or .lhs file containing the Main module.
+  main-is:             Main.hs
+
+  -- Modules included in this executable, other than Main.
+  -- other-modules:
+
+  -- LANGUAGE extensions used by modules in this package.
+  other-extensions:    NoImplicitPrelude
+
+  -- Other library packages from which modules are imported.
+  build-depends:       base ^>=4.12.0.0, project
+
+  -- Directories containing source files.
+  hs-source-dirs:      app
+
+  -- Base language which the package is written in.
+  default-language:    Haskell2010
+
+
+test-suite project-test
+  -- Base language which the package is written in.
+  default-language:    Haskell2010
+
+  -- The interface type and version of the test suite.
+  type:                exitcode-stdio-1.0
+
+  -- The directory where the test specifications are found.
+  hs-source-dirs:      test
+
+  -- The entrypoint to the test suite.
+  main-is:             MyLibTest.hs
+
+  -- Test dependencies.
+  build-depends:       base ^>=4.12.0.0
+

src/posts/0010-Haskell-Now/project/release.nix

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+let
+  def = import ./. {};
+in
+ { my_project = def.my_project; }

src/posts/0010-Haskell-Now/project/shell.nix

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+(import ./. {}).shell

src/posts/0010-Haskell-Now/project/src/MyLib.hs

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+{-# LANGUAGE NoImplicitPrelude #-}
+module MyLib (someFunc) where
+
+import Protolude
+
+someFunc :: IO ()
+someFunc = putStrLn "someFunc"

src/posts/0010-Haskell-Now/project/test/MyLibTest.hs

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+module Main (main) where
+
+main :: IO ()
+main = putStrLn "Test suite not yet implemented."