init

.ghci

@@ -0,0 +1,12 @@
+:set -isrc
+:l src/Lets.hs
+:set prompt ">> "
+:set -Wall
+:set -fno-warn-unused-binds
+:set -fno-warn-unused-do-bind
+:set -fno-warn-unused-imports
+:set -fno-warn-type-defaults
+:set -XNoImplicitPrelude
+:set -XScopedTypeVariables
+:set -XOverloadedStrings
+:set -XRebindableSyntax

.gitignore

@@ -0,0 +1,30 @@
+*~
+*#*
+
+# CABAL
+/dist
+/cabal-dev
+/.cabal-sandbox
+/cabal.sandbox.config
+
+# Haskell Program Coverage
+/.hpc
+
+# Leksah
+*.lkshs
+
+# Intellij IDEA
+/.idea
+
+# darcs
+/_darcs
+
+# ctags
+TAGS
+
+# sbt
+/project
+/target
+
+*.swp
+

LICENCE

@@ -0,0 +1,27 @@
+Copyright 2012-2015 National ICT Australia Limited
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. 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.
+3. Neither the name of the author nor the names of his contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 AUTHORS 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.

README.markdown

@@ -0,0 +1 @@
+# Let's Lens

Setup.lhs

@@ -0,0 +1,44 @@
+#!/usr/bin/env runhaskell
+\begin{code}
+{-# OPTIONS_GHC -Wall #-}
+module Main (main) where
+
+import Data.List ( nub )
+import Data.Version ( showVersion )
+import Distribution.Package ( PackageName(PackageName), PackageId, InstalledPackageId, packageVersion, packageName )
+import Distribution.PackageDescription ( PackageDescription(), TestSuite(..) )
+import Distribution.Simple ( defaultMainWithHooks, UserHooks(..), simpleUserHooks )
+import Distribution.Simple.Utils ( rewriteFile, createDirectoryIfMissingVerbose )
+import Distribution.Simple.BuildPaths ( autogenModulesDir )
+import Distribution.Simple.Setup ( BuildFlags(buildVerbosity), fromFlag )
+import Distribution.Simple.LocalBuildInfo ( withLibLBI, withTestLBI, LocalBuildInfo(), ComponentLocalBuildInfo(componentPackageDeps) )
+import Distribution.Verbosity ( Verbosity )
+import System.FilePath ( (</>) )
+
+main :: IO ()
+main = defaultMainWithHooks simpleUserHooks
+  { buildHook = \pkg lbi hooks flags -> do
+     generateBuildModule (fromFlag (buildVerbosity flags)) pkg lbi
+     buildHook simpleUserHooks pkg lbi hooks flags
+  }
+
+generateBuildModule :: Verbosity -> PackageDescription -> LocalBuildInfo -> IO ()
+generateBuildModule verbosity pkg lbi = do
+  let dir = autogenModulesDir lbi
+  createDirectoryIfMissingVerbose verbosity True dir
+  withLibLBI pkg lbi $ \_ libcfg -> do
+    withTestLBI pkg lbi $ \suite suitecfg -> do
+      rewriteFile (dir </> "Build_" ++ testName suite ++ ".hs") $ unlines
+        [ "module Build_" ++ testName suite ++ " where"
+        , "deps :: [String]"
+        , "deps = " ++ (show $ formatdeps (testDeps libcfg suitecfg))
+        ]
+  where
+    formatdeps = map (formatone . snd)
+    formatone p = case packageName p of
+      PackageName n -> n ++ "-" ++ showVersion (packageVersion p)
+
+testDeps :: ComponentLocalBuildInfo -> ComponentLocalBuildInfo -> [(InstalledPackageId, PackageId)]
+testDeps xs ys = nub $ componentPackageDeps xs ++ componentPackageDeps ys
+
+\end{code}

changelog

@@ -0,0 +1,4 @@
+0.0.1
+
+Init
+

lets-lens.cabal

@@ -0,0 +1,71 @@
+name:                 lets-lens
+version:              0.0.1
+license:              BSD3
+license-file:         LICENCE
+author:               Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ>
+maintainer:           Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ>
+copyright:            Copyright (C) 2015 National ICT Australia Limited
+synopsis:             Source code for exercises on the lens concept
+category:             Education
+description:          Source code for exercises on the lens concept
+homepage:             https://github.com/tonymorris/lets-lens
+bug-reports:          https://github.com/tonymorris/lets-lens/issues
+cabal-version:        >= 1.10
+build-type:           Custom
+extra-source-files:   changelog
+
+source-repository     head
+  type:               git
+  location:           git@github.com:tonymorris/lets-lens.git
+
+flag                  small_base
+  description:        Choose the new, split-up base package.
+
+library
+  default-language:   Haskell2010
+
+  build-depends:      base < 5 && >= 4
+                      , QuickCheck >= 2.0
+                      , doctest >= 0.9.7
+                      , containers >= 0.4.0.0
+                      , array >= 0.4
+
+  ghc-options:        -Wall
+                      -fno-warn-unused-binds
+                      -fno-warn-unused-do-bind
+                      -fno-warn-unused-imports
+                      -fno-warn-type-defaults
+
+  default-extensions: NoImplicitPrelude
+                      ScopedTypeVariables
+                      InstanceSigs
+                      RebindableSyntax
+
+  hs-source-dirs:     src
+
+  exposed-modules:    Lets
+                      
+test-suite            doctests
+  type:
+                      exitcode-stdio-1.0
+
+  main-is:
+                      doctests.hs
+
+  default-language:
+                      Haskell2010
+
+  build-depends:
+                      base < 5 && >= 3
+                      , doctest >= 0.9.7
+                      , filepath >= 1.3
+                      , directory >= 1.1
+                      , QuickCheck >= 2.0
+                      , template-haskell >= 2.8
+
+  ghc-options:
+                      -Wall
+                      -threaded
+
+  hs-source-dirs:
+                      test

src/Lets.hs

@@ -0,0 +1,2 @@
+module Lets where
+

test/.gitignore

@@ -0,0 +1,8 @@
+# cabal
+/dist
+
+# cabal-dev
+/cabal-dev
+
+# Haskell Program Coverage
+/.hpc

test/doctests.hs

@@ -0,0 +1,46 @@
+module Main where
+
+import Build_doctests (deps)
+import Control.Applicative
+import Control.Monad
+import Data.List
+import System.Directory
+import System.FilePath
+import Test.DocTest
+
+main ::
+  IO ()
+main =
+  getSources >>= \sources -> doctest $
+      "-isrc"
+    : "-idist/build/autogen"
+    : "-optP-include"
+    : "-optPdist/build/autogen/cabal_macros.h"
+    : "-hide-all-packages"
+    : map ("-package="++) deps ++ sources
+
+sourceDirectories ::
+  [FilePath]
+sourceDirectories =
+  [
+    "src"
+  ]
+
+isSourceFile ::
+  FilePath
+  -> Bool
+isSourceFile p =
+  and [takeFileName p /= "Setup.hs", isSuffixOf ".hs" p]
+
+getSources :: IO [FilePath]
+getSources =
+  liftM (filter isSourceFile . concat) (mapM go sourceDirectories)
+    where
+      go dir = do
+        (dirs, files) <- getFilesAndDirectories dir
+        (files ++) . concat <$> mapM go dirs
+
+getFilesAndDirectories :: FilePath -> IO ([FilePath], [FilePath])
+getFilesAndDirectories dir = do
+  c <- map (dir </>) . filter (`notElem` ["..", "."]) <$> getDirectoryContents dir
+  (,) <$> filterM doesDirectoryExist c <*> filterM doesFileExist c