Deprecation notice

.stylish-haskell.yaml

@@ -0,0 +1,233 @@
+# stylish-haskell configuration file
+# ==================================
+
+# The stylish-haskell tool is mainly configured by specifying steps. These steps
+# are a list, so they have an order, and one specific step may appear more than
+# once (if needed). Each file is processed by these steps in the given order.
+steps:
+  # Convert some ASCII sequences to their Unicode equivalents. This is disabled
+  # by default.
+  # - unicode_syntax:
+  #     # In order to make this work, we also need to insert the UnicodeSyntax
+  #     # language pragma. If this flag is set to true, we insert it when it's
+  #     # not already present. You may want to disable it if you configure
+  #     # language extensions using some other method than pragmas. Default:
+  #     # true.
+  #     add_language_pragma: true
+
+  # Align the right hand side of some elements.  This is quite conservative
+  # and only applies to statements where each element occupies a single
+  # line.
+  - simple_align:
+      cases: true
+      top_level_patterns: true
+      records: true
+
+  # Import cleanup
+  - imports:
+      # There are different ways we can align names and lists.
+      #
+      # - global: Align the import names and import list throughout the entire
+      #   file.
+      #
+      # - file: Like global, but don't add padding when there are no qualified
+      #   imports in the file.
+      #
+      # - group: Only align the imports per group (a group is formed by adjacent
+      #   import lines).
+      #
+      # - none: Do not perform any alignment.
+      #
+      # Default: global.
+      align: global
+
+      # The following options affect only import list alignment.
+      #
+      # List align has following options:
+      #
+      # - after_alias: Import list is aligned with end of import including
+      #   'as' and 'hiding' keywords.
+      #
+      #   > import qualified Data.List      as List (concat, foldl, foldr, head,
+      #   >                                          init, last, length)
+      #
+      # - with_alias: Import list is aligned with start of alias or hiding.
+      #
+      #   > import qualified Data.List      as List (concat, foldl, foldr, head,
+      #   >                                 init, last, length)
+      #
+      # - new_line: Import list starts always on new line.
+      #
+      #   > import qualified Data.List      as List
+      #   >     (concat, foldl, foldr, head, init, last, length)
+      #
+      # Default: after_alias
+      list_align: after_alias
+
+      # Right-pad the module names to align imports in a group:
+      #
+      # - true: a little more readable
+      #
+      #   > import qualified Data.List       as List (concat, foldl, foldr,
+      #   >                                           init, last, length)
+      #   > import qualified Data.List.Extra as List (concat, foldl, foldr,
+      #   >                                           init, last, length)
+      #
+      # - false: diff-safe
+      #
+      #   > import qualified Data.List as List (concat, foldl, foldr, init,
+      #   >                                     last, length)
+      #   > import qualified Data.List.Extra as List (concat, foldl, foldr,
+      #   >                                           init, last, length)
+      #
+      # Default: true
+      pad_module_names: true
+
+      # Long list align style takes effect when import is too long. This is
+      # determined by 'columns' setting.
+      #
+      # - inline: This option will put as much specs on same line as possible.
+      #
+      # - new_line: Import list will start on new line.
+      #
+      # - new_line_multiline: Import list will start on new line when it's
+      #   short enough to fit to single line. Otherwise it'll be multiline.
+      #
+      # - multiline: One line per import list entry.
+      #   Type with constructor list acts like single import.
+      #
+      #   > import qualified Data.Map as M
+      #   >     ( empty
+      #   >     , singleton
+      #   >     , ...
+      #   >     , delete
+      #   >     )
+      #
+      # Default: inline
+      long_list_align: inline
+
+      # Align empty list (importing instances)
+      #
+      # Empty list align has following options
+      #
+      # - inherit: inherit list_align setting
+      #
+      # - right_after: () is right after the module name:
+      #
+      #   > import Vector.Instances ()
+      #
+      # Default: inherit
+      empty_list_align: inherit
+
+      # List padding determines indentation of import list on lines after import.
+      # This option affects 'long_list_align'.
+      #
+      # - <integer>: constant value
+      #
+      # - module_name: align under start of module name.
+      #   Useful for 'file' and 'group' align settings.
+      list_padding: 4
+
+      # Separate lists option affects formatting of import list for type
+      # or class. The only difference is single space between type and list
+      # of constructors, selectors and class functions.
+      #
+      # - true: There is single space between Foldable type and list of it's
+      #   functions.
+      #
+      #   > import Data.Foldable (Foldable (fold, foldl, foldMap))
+      #
+      # - false: There is no space between Foldable type and list of it's
+      #   functions.
+      #
+      #   > import Data.Foldable (Foldable(fold, foldl, foldMap))
+      #
+      # Default: true
+      separate_lists: true
+
+      # Space surround option affects formatting of import lists on a single
+      # line. The only difference is single space after the initial
+      # parenthesis and a single space before the terminal parenthesis.
+      #
+      # - true: There is single space associated with the enclosing
+      #   parenthesis.
+      #
+      #   > import Data.Foo ( foo )
+      #
+      # - false: There is no space associated with the enclosing parenthesis
+      #
+      #   > import Data.Foo (foo)
+      #
+      # Default: false
+      space_surround: false
+
+  # Language pragmas
+  - language_pragmas:
+      # We can generate different styles of language pragma lists.
+      #
+      # - vertical: Vertical-spaced language pragmas, one per line.
+      #
+      # - compact: A more compact style.
+      #
+      # - compact_line: Similar to compact, but wrap each line with
+      #   `{-#LANGUAGE #-}'.
+      #
+      # Default: vertical.
+      style: vertical
+
+      # Align affects alignment of closing pragma brackets.
+      #
+      # - true: Brackets are aligned in same column.
+      #
+      # - false: Brackets are not aligned together. There is only one space
+      #   between actual import and closing bracket.
+      #
+      # Default: true
+      align: true
+
+      # stylish-haskell can detect redundancy of some language pragmas. If this
+      # is set to true, it will remove those redundant pragmas. Default: true.
+      remove_redundant: true
+
+  # Replace tabs by spaces. This is disabled by default.
+  # - tabs:
+  #     # Number of spaces to use for each tab. Default: 8, as specified by the
+  #     # Haskell report.
+  #     spaces: 8
+
+  # Remove trailing whitespace
+  - trailing_whitespace: {}
+
+  # Squash multiple spaces between the left and right hand sides of some
+  # elements into single spaces. Basically, this undoes the effect of
+  # simple_align but is a bit less conservative.
+  # - squash: {}
+
+# A common setting is the number of columns (parts of) code will be wrapped
+# to. Different steps take this into account. Default: 80.
+columns: 80
+
+# By default, line endings are converted according to the OS. You can override
+# preferred format here.
+#
+# - native: Native newline format. CRLF on Windows, LF on other OSes.
+#
+# - lf: Convert to LF ("\n").
+#
+# - crlf: Convert to CRLF ("\r\n").
+#
+# Default: native.
+newline: native
+
+# Sometimes, language extensions are specified in a cabal file or from the
+# command line instead of using language pragmas in the file. stylish-haskell
+# needs to be aware of these, so it can parse the file correctly.
+#
+# No language extensions are enabled by default.
+language_extensions:
+  - DeriveGeneric
+  - NoImplicitPrelude
+  - OverloadedStrings
+  - RecordWildCards
+  # - TemplateHaskell
+  # - QuasiQuotes

.travis.yml

@@ -8,4 +8,5 @@ before_script:
   - mkdir -p ~/.config/nixpkgs
 
 script:
-  - nix-build ./release.nix -A backend --option trusted-public-keys "masser-ebook-manager.cachix.org-1:mtFSkQ2MO5MvjUpulZoFKjKUIa8g8CTcdPVuJaPKS1w= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" --option binary-caches "https://cache.nixos.org https://masser-ebook-manager.cachix.org"
+  - nix build -f ./release.nix --option trusted-public-keys "masser-ebook-manager.cachix.org-1:mtFSkQ2MO5MvjUpulZoFKjKUIa8g8CTcdPVuJaPKS1w= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" --option binary-caches "https://masser-ebook-manager.cachix.org https://cache.nixos.org" ghc.backend ghc.frontend
+  - nix build -f ./release.nix --option trusted-public-keys "masser-ebook-manager.cachix.org-1:mtFSkQ2MO5MvjUpulZoFKjKUIa8g8CTcdPVuJaPKS1w= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" --option binary-caches "https://masser-ebook-manager.cachix.org https://cache.nixos.org" ghcjs.frontend

README.md

@@ -0,0 +1,2 @@
+**DEPRECATED**
+[![Build Status](https://travis-ci.org/MasseR/ebook-manager.svg?branch=master)](https://travis-ci.org/MasseR/ebook-manager)

backend/backend.cabal

@@ -17,12 +17,14 @@ cabal-version:       >=1.10
 
 executable backend
   main-is:             Main.hs
+  ghc-options:         -Wall -threaded -rtsopts -with-rtsopts=-N
   other-modules:       Devel.Main
                      , API
                      , API.Books
                      , API.Catalogue
                      , API.Channels
                      , API.Users
+                     , Configuration
                      , Database
                      , Database.Book
                      , Database.Channel
@@ -93,25 +95,30 @@ test-suite spec
   main-is:             Spec.hs
   hs-source-dirs:      src
   build-depends:       base >=4.10
-                     , exceptions
-                     , monad-control
-                     , common
                      , aeson
                      , asn1-data
                      , asn1-types
                      , bytestring
                      , classy-prelude
+                     , common
                      , cryptonite
                      , dhall
                      , directory
+                     , exceptions
                      , foreign-store
                      , generic-lens
+                     , genvalidity-hspec
+                     , genvalidity-hspec-aeson
+                     , genvalidity-property
+                     , genvalidity-text
+                     , hspec
                      , http-api-data
                      , http-media
                      , jose
                      , lens
                      , lucid
                      , memory
+                     , monad-control
                      , monad-logger
                      , mtl
                      , pandoc
@@ -123,25 +130,21 @@ test-suite spec
                      , selda-postgresql
                      , servant
                      , servant-auth
+                     , servant-auth-docs
                      , servant-auth-server
                      , servant-docs
-                     , servant-auth-docs
                      , servant-lucid
                      , servant-multipart
                      , servant-server
                      , text
                      , transformers
+                     , validity
                      , wai
                      , warp
                      , x509
                      , x509-store
                      , xml-conduit
                      , xml-hamlet
-                     , validity
-                     , genvalidity-hspec
-                     , genvalidity-property
-                     , genvalidity-text
-                     , hspec
   default-extensions:  DeriveGeneric
                      , NoImplicitPrelude
                      , OverloadedStrings

backend/src/API.hs

@@ -1,31 +1,21 @@
-{-# Language DataKinds #-}
+{-# LANGUAGE DataKinds             #-}
-{-# Language TypeFamilies #-}
+{-# LANGUAGE FlexibleInstances     #-}
-{-# Language TypeOperators #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
-{-# Language NoImplicitPrelude #-}
+{-# LANGUAGE NoImplicitPrelude     #-}
-{-# Language MultiParamTypeClasses #-}
+{-# LANGUAGE TypeFamilies          #-}
-{-# Language OverloadedStrings #-}
+{-# LANGUAGE TypeOperators         #-}
-{-# Language TemplateHaskell #-}
-{-# Language QuasiQuotes #-}
-{-# Language RecordWildCards #-}
-{-# Language DeriveGeneric #-}
-{-# Language FlexibleInstances #-}
 module API (API, handler) where
 
 
-import Servant
+import           Servant
-import Servant.HTML.Lucid (HTML)
+import           Types
-import Types
 
-import View
+import qualified API.Books          as Books
+import qualified API.Catalogue      as Catalogue
+import qualified API.Channels       as Channels
+import qualified API.Users          as Users
 
-import qualified API.Users as Users
+type API = "api" :> Users.API
-import qualified API.Channels as Channels
-import qualified API.Books as Books
-import qualified API.Catalogue as Catalogue
-
-data Index = Index
-
-type API = Users.API
       :<|> "api" :> "current" :> Channels.API
       :<|> "api" :> "current" :> Books.API
       :<|> "api" :> "1" :> Catalogue.VersionedAPI 1
@@ -38,11 +28,3 @@ handler = Users.handler
     :<|> Catalogue.handler
     :<|> Catalogue.handler
 
-instance ToHtml Index where
-  toHtml _ = do
-    h1_ [class_ "title"] "Home page"
-    p_ [class_ "subtitle"] "Hello world"
-  toHtmlRaw = toHtml
-
-indexHandler :: AppM (AppView Index)
-indexHandler = mkView "Home" Index

backend/src/API/Books.hs

@@ -17,7 +17,7 @@ module API.Books where
 
 import           ClassyPrelude
 import           Control.Lens
-import           Control.Monad.Catch       (MonadThrow, throwM)
+import           Control.Monad.Catch       (throwM)
 import           Control.Monad.Trans.Maybe
 import           Crypto.Hash               (digestFromByteString)
 import           Data.Aeson
@@ -63,8 +63,6 @@ instance FromJSON PostBook
 
 type API = Auth '[SA.BasicAuth, SA.JWT] SafeUser :> BaseAPI
 
-instance Docs.ToCapture (Capture "book_id" BookID) where
-  toCapture _ = Docs.DocCapture "book_id" "The book id"
 
 type BaseAPI = "books" :> Get '[JSON] [JsonBook]
        :<|> "books" :> ReqBody '[JSON] PostBook :> Post '[JSON] JsonBook

backend/src/API/Catalogue.hs

@@ -17,7 +17,7 @@
 module API.Catalogue (VersionedAPI, handler) where
 
 import qualified API.Books
-import           ClassyPrelude
+import           ClassyPrelude hiding (link)
 import           Database
 import           Database.Book (Book(..))
 import qualified Database.Channel as Channel
@@ -46,15 +46,16 @@ data Pagination = Pagination { previous :: Maybe Rel
 
 newtype SubSection = SubSection Rel deriving (Show)
 newtype Acquisition = Acquisition Rel deriving (Show)
+newtype Time = Time { getTime :: UTCTime } deriving Show
 
 data instance Entry 1 = EntryV1 { title :: Text
                                 , identifier :: Text
-                                , updated :: UTCTime
+                                , updated :: Time
                                 , content :: Text
                                 , link :: Either SubSection Acquisition
                                 }
 
-data instance Catalog 1 = CatalogV1 { updated :: UTCTime
+data instance Catalog 1 = CatalogV1 { updated :: Time
                                     , self :: Rel
                                     , start :: Rel
                                     , pagination :: Pagination
@@ -68,7 +69,7 @@ deriving instance Generic (Entry 1)
 
 instance Docs.ToSample (Entry 1) where
   toSamples _ = [("Entry", EntryV1 "title" "identifier" docsTime "content" (Left (SubSection (Rel "sub"))))]
-instance Docs.ToSample UTCTime where
+instance Docs.ToSample Time where
   toSamples _ = [("time", docsTime)]
 instance Docs.ToSample Rel where
   toSamples _ = [("Relative link", Rel "next")]
@@ -76,8 +77,8 @@ instance Docs.ToSample Pagination
 instance Docs.ToSample (Catalog 1) -- where
   -- toSamples _ = [("catalog", CatalogV1 docsTime (Rel "prev") (Rel "next") (Pagination (Just "previous") (Just "next")) [])]
 
-docsTime :: UTCTime
+docsTime :: Time
-docsTime = unsafePerformIO getCurrentTime
+docsTime = Time $ unsafePerformIO getCurrentTime
 
 
 instance ToNode SubSection where
@@ -91,7 +92,7 @@ instance ToNode (Entry 1) where
 <entry>
   <title>#{title}
   <id>#{identifier}
-  <updated>#{iso8601 updated}
+  <updated>#{iso8601 $ getTime updated}
   <content>#{content}
   ^{either toNode toNode link}
   |]
@@ -101,7 +102,7 @@ instance ToNode (Catalog 1) where
 <feed xmlns="http://www.w3.org/2005/Atom" xmlns:opds="http://opds-spec.org/2010/catalog">
   <id>#{unRel self}
   <title>Give me a title
-  <updated>#{iso8601 updated}
+  <updated>#{iso8601 $ getTime updated}
   <link type="application/atom+xml;profile=opds-catalog;kind=navigation" rel="self" href="#{unRel self}">
   <link type="application/atom+xml;profile=opds-catalog;kind=navigation" rel="start" href="#{unRel start}">
   $maybe n <- (next pagination)
@@ -125,7 +126,7 @@ relUrl x = Rel ("/api/current/" <> (pack . uriPath . linkURI $ x))
 
 getBooksV1 :: Channel.ChannelID -> SafeUser -> AppM (Catalog 1)
 getBooksV1 channelID SafeUser{username} = do
-  updated <- liftIO getCurrentTime
+  updated <- Time <$> liftIO getCurrentTime
   let self = relUrl selfUrl
       start = relUrl startUrl
       selfUrl = safeLink (Proxy @(BaseAPI 1)) (Proxy @(ChannelCatalog 1)) channelID
@@ -142,7 +143,7 @@ getBooksV1 channelID SafeUser{username} = do
 
 getChannelsV1 :: SafeUser -> AppM (Catalog 1)
 getChannelsV1 SafeUser{username} = do
-  updated <- liftIO getCurrentTime
+  updated <- Time <$> liftIO getCurrentTime
   let self = relUrl selfUrl
       -- I'm not sure if this safe link approach is really useable with this
       -- api hierarchy since I can't access the topmost api from here. Also
@@ -153,7 +154,7 @@ getChannelsV1 SafeUser{username} = do
   entries <- map (fromChannel updated) <$> runDB (Channel.userChannels username)
   pure CatalogV1{..}
   where
-    fromChannel :: UTCTime -> Channel.Channel -> Entry 1
+    fromChannel :: Time -> Channel.Channel -> Entry 1
     fromChannel updated Channel.Channel{..} =
       let url = safeLink (Proxy @(BaseAPI 1)) (Proxy @(ChannelCatalog 1)) identifier
           self = relUrl url

backend/src/API/Channels.hs

@@ -16,7 +16,7 @@ module API.Channels (API, handler, JsonChannel(..)) where
 
 import           ClassyPrelude
 import           Control.Lens
-import           Control.Monad.Catch   (MonadThrow, throwM)
+import           Control.Monad.Catch   (throwM)
 import           Control.Monad.Logger
 import           Data.Aeson
 import           Data.Generics.Product
@@ -49,9 +49,6 @@ instance FromJSON UpdateChannel
 
 type API = Auth '[SA.BasicAuth, SA.Cookie, SA.JWT] SafeUser :> BaseAPI
 
-instance Docs.ToCapture (Capture "channel_id" ChannelID) where
-  toCapture _ = Docs.DocCapture "channel_id" "The channel id"
-
 type BaseAPI = "channels" :> ReqBody '[JSON] JsonChannel :> Post '[JSON] UpdateChannel
           :<|> "channels" :> Capture "channel_id" ChannelID :> ReqBody '[JSON] UpdateChannel :> Put '[JSON] UpdateChannel
           :<|> "channels" :> Get '[JSON] [JsonChannel]

backend/src/API/Users.hs

@@ -1,30 +1,30 @@
-{-# Language DataKinds #-}
+{-# LANGUAGE DataKinds             #-}
-{-# Language TypeFamilies #-}
+{-# LANGUAGE DuplicateRecordFields #-}
-{-# Language OverloadedStrings #-}
+{-# LANGUAGE NoImplicitPrelude     #-}
-{-# Language NoImplicitPrelude #-}
+{-# LANGUAGE OverloadedStrings     #-}
-{-# Language TypeOperators #-}
+{-# LANGUAGE TypeApplications      #-}
-{-# Language DuplicateRecordFields #-}
+{-# LANGUAGE TypeFamilies          #-}
-{-# Language TypeApplications #-}
+{-# LANGUAGE TypeOperators         #-}
 module API.Users  where
 
 import           ClassyPrelude
-import           Control.Monad.Catch (throwM, MonadThrow)
+import           Control.Monad.Catch (throwM)
 import           Data.Aeson
-import           Database (runDB)
+import           Database            (runDB)
 import           Database.Schema
 import           Database.User
 import           Servant
-import           Servant.Auth as SA
+import           Servant.Auth        as SA
 import           Servant.Auth.Server as SAS
-import qualified Servant.Docs as Docs
+import qualified Servant.Docs        as Docs
 import           Server.Auth
 import           Types
 import           Web.FormUrlEncoded
 
 
-data RegisterForm = RegisterForm { username :: Username
+data RegisterForm = RegisterForm { username      :: Username
-                                 , email :: Email
+                                 , email         :: Email
-                                 , password :: PlainPassword
+                                 , password      :: PlainPassword
                                  , passwordAgain :: PlainPassword }
                   deriving (Generic, Show)
 
@@ -56,7 +56,7 @@ handler = loginHandler :<|> registerHandler
 
 loginHandler :: AuthResult SafeUser -> AppM LoginStatus
 loginHandler (Authenticated u) = return (LoginStatus (Just u))
-loginHandler _ = return (LoginStatus Nothing)
+loginHandler _                 = return (LoginStatus Nothing)
 
 registerHandler :: RegisterForm -> AppM RegisterStatus
 registerHandler RegisterForm{..} =

backend/src/Configuration.hs

@@ -9,7 +9,8 @@ import Dhall (Interpret)
 data Pg = Pg { username :: Text
              , password :: Text
              , host :: Text
-             , database :: Text }
+             , database :: Text
+             , migrations :: Text }
         deriving (Show, Generic)
 
 data Store = Filestore { path :: Text }
@@ -17,9 +18,11 @@ data Store = Filestore { path :: Text }
            deriving (Show, Generic)
 
 data Config = Config { database :: Pg
-                     , store :: Store }
+                     , store :: Store
+                     , port :: Integer }
             deriving (Show, Generic)
 
 instance Interpret Pg
 instance Interpret Store
 instance Interpret Config
+

backend/src/Database/Schema.hs

@@ -3,6 +3,9 @@
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
 {-# LANGUAGE NoImplicitPrelude          #-}
 {-# LANGUAGE OverloadedStrings          #-}
+{-# LANGUAGE DataKinds          #-}
+{-# LANGUAGE TypeSynonymInstances          #-}
+{-# LANGUAGE FlexibleInstances          #-}
 module Database.Schema where
 
 import           ClassyPrelude
@@ -11,6 +14,7 @@ import           Database.Selda
 import           Database.Selda.Backend
 import           Database.Selda.Generic
 import qualified Servant.Docs           as Docs
+import Servant (Capture)
 import           Web.HttpApiData
 
 -- | User type
@@ -53,8 +57,14 @@ newtype UserID = UserID {unUserID :: Int} deriving (Show)
 
 newtype BookID = BookID {unBookID :: Int} deriving (Show, ToJSON, FromJSON, FromHttpApiData, Eq, Ord, ToHttpApiData, Generic, Num)
 
+instance Docs.ToCapture (Capture "book_id" BookID) where
+  toCapture _ = Docs.DocCapture "book_id" "The book id"
+
 newtype ChannelID = ChannelID {unChannelID :: Int} deriving (Show, ToHttpApiData, FromHttpApiData, ToJSON, FromJSON, Eq, Generic, Num)
 
+instance Docs.ToCapture (Capture "channel_id" ChannelID) where
+  toCapture _ = Docs.DocCapture "channel_id" "The channel id"
+
 newtype TagID = TagID {unTagID :: Int} deriving (Show)
 
 instance SqlType UserID where

backend/src/Main.hs

@@ -1,25 +1,27 @@
-{-# Language OverloadedStrings #-}
+{-# LANGUAGE DataKinds             #-}
-{-# Language RecordWildCards #-}
+{-# LANGUAGE DuplicateRecordFields #-}
-{-# Language DuplicateRecordFields #-}
+{-# LANGUAGE NoImplicitPrelude     #-}
-{-# Language TypeApplications #-}
+{-# LANGUAGE OverloadedStrings     #-}
-{-# Language DataKinds #-}
+{-# LANGUAGE RecordWildCards       #-}
-{-# Language NoImplicitPrelude #-}
+{-# LANGUAGE TypeApplications      #-}
 module Main where
 
-import Server (server)
+import           ClassyPrelude
-import Network.Wai.Handler.Warp (run)
+import           Configuration
-import Types
+import           Control.Lens              (view, to)
-import Configuration
+import           Data.Generics.Product
-import Dhall (input, auto)
+import           Data.Pool                 (createPool)
-import ClassyPrelude
+import           Database.Selda.PostgreSQL (PGConnectInfo (..), pgOpen,
-import Control.Lens (view)
+                                            seldaClose)
-import Data.Generics.Product
+import           Dhall                     (auto, input)
-import Data.Pool (createPool)
+import           Network.Wai.Handler.Warp  (run)
-import Database.Selda.PostgreSQL (PGConnectInfo(..), pgOpen, seldaClose)
+import           Servant.Auth.Server       (generateKey)
-import Servant.Auth.Server (generateKey)
+import           Server                    (server)
+import           Types
+import System.Environment (getEnvironment)
 
 defaultMain :: App -> IO ()
-defaultMain = run 8080 . server
+defaultMain app = run (view (field @"config" . field @"port" . to fromIntegral) app) $ server app
 
 withApp :: Config -> (App -> IO ()) -> IO ()
 withApp config f = do
@@ -35,5 +37,6 @@ withApp config f = do
 
 main :: IO ()
 main = do
-  c <- input auto "./config/config.dhall"
+  path <- fmap pack . lookup "CONF" <$> getEnvironment
+  c <- input auto (fromMaybe "./config/config.dhall" path)
   withApp c defaultMain

backend/src/Server.hs

@@ -1,19 +1,15 @@
 {-# LANGUAGE DataKinds             #-}
-{-# LANGUAGE DeriveGeneric         #-}
 {-# LANGUAGE FlexibleInstances     #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE NoImplicitPrelude     #-}
 {-# LANGUAGE OverloadedStrings     #-}
-{-# LANGUAGE QuasiQuotes           #-}
-{-# LANGUAGE RecordWildCards       #-}
 {-# LANGUAGE ScopedTypeVariables   #-}
-{-# LANGUAGE TemplateHaskell       #-}
 {-# LANGUAGE TypeApplications      #-}
 {-# LANGUAGE TypeFamilies          #-}
 {-# LANGUAGE TypeOperators         #-}
 module Server where
 
-import qualified API                   as API
+import qualified API
 import           ClassyPrelude         hiding (Handler)
 import           Control.Lens
 import           Control.Monad.Except
@@ -24,18 +20,16 @@ import           Servant.Auth.Docs     ()
 import           Servant.Auth.Server   as SAS
 import qualified Servant.Docs          as Docs
 import           Servant.HTML.Lucid    (HTML)
-import           Server.Auth           (SafeUser)
+import           Server.Auth           (SafeUser, authCheck)
-import           Server.Auth           (authCheck)
 import           Types
 
 type API = API.API
-  :<|> "help" :> Get '[PlainText, HTML] String
+  :<|> "api" :> "help" :> Get '[PlainText, HTML] String
-  :<|> "static" :> Raw
 
 type Ctx = '[BasicAuthData -> IO (AuthResult SafeUser), CookieSettings, JWTSettings]
 
 server :: App -> Application
-server app = serveWithContext api cfg (hoistServerWithContext (Proxy @ API.API) (Proxy @ Ctx) server' API.handler :<|> serveDocs :<|> serveDirectoryFileServer "static")
+server app = serveWithContext api cfg (hoistServerWithContext (Proxy @ API.API) (Proxy @ Ctx) server' API.handler :<|> serveDocs)
   where
     apiDocs :: Docs.API
     apiDocs = Docs.docs (Proxy @API.API)
@@ -46,6 +40,6 @@ server app = serveWithContext api cfg (hoistServerWithContext (Proxy @ API.API)
     cookieSettings = SAS.defaultCookieSettings{cookieIsSecure=SAS.NotSecure}
     cfg = jwtCfg :. cookieSettings :. authCfg :. EmptyContext
     server' :: AppM a -> Servant.Handler a
-    server' = Handler . ExceptT . try . (`runReaderT` app) . (runFileLoggingT "logs/server.log")
+    server' = Handler . ExceptT . try . (`runReaderT` app) . runFileLoggingT "logs/server.log"
     api :: Proxy API
     api = Proxy

backend/src/Spec.hs

@@ -1,15 +1,16 @@
-{-# Language TypeApplications #-}
+{-# LANGUAGE TypeApplications #-}
 module Main where
 
 import           API.Books
-import qualified Data.Aeson as A
+import qualified Data.Aeson            as A
-import           Data.Char (isPrint)
+import           Data.Char             (isPrint)
 import           Data.GenValidity.Text ()
-import qualified Data.Text as T
+import qualified Data.Text             as T
 import           Database.Schema
 import           Prelude
 import           Test.Hspec
 import           Test.Validity
+import           Test.Validity.Aeson
 
 instance GenUnchecked PlainPassword
 instance GenValid PlainPassword
@@ -51,15 +52,15 @@ instance Validity PostBook
 spec :: Spec
 spec = do
   describe "JSON encoding" $ do
-    it "Works for PlainPassword" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @PlainPassword) A.decode
+    jsonSpecOnValid @PlainPassword
-    it "Works for Email" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @Email) A.decode
+    jsonSpecOnValid @Email
-    it "Username" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @Username) A.decode
+    jsonSpecOnValid @Username
-    it "Works for BookID" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @BookID) A.decode
+    jsonSpecOnValid @BookID
-    it "Works for ChannelID" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @ChannelID) A.decode
+    jsonSpecOnValid @ChannelID
-    it "Works for Role" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @Role) A.decode
+    jsonSpecOnValid @Role
-    it "Works for Visibility" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @Visibility) A.decode
+    jsonSpecOnValid @Visibility
-    it "Works for JsonBook" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @JsonBook) A.decode
+    jsonSpecOnValid @JsonBook
-    it "Works for PostBook" $ inverseFunctionsIfSecondSucceedsOnValid (A.encode @PostBook) A.decode
+    jsonSpecOnValid @PostBook
 
 main :: IO ()
 main = hspec spec

common/common.cabal

@@ -13,13 +13,10 @@ extra-source-files:  ChangeLog.md
 cabal-version:       >=1.10
 
 library
-  exposed-modules:     Configuration
+  exposed-modules:     Data.Versioned
-                     , Data.Versioned
   -- other-extensions:
   build-depends:       base >=4.10
                      , classy-prelude
-                     , dhall
-                     , foreign-store
                      , generic-lens
                      , lens
                      , mtl
@@ -32,20 +29,19 @@ library
                      , RecordWildCards
   default-language:    Haskell2010
 
-test-suite spec
+-- test-suite spec
-  type:                exitcode-stdio-1.0
+--   type:                exitcode-stdio-1.0
-  main-is:             Spec.hs
+--   main-is:             Spec.hs
-  hs-source-dirs:      src
+--   hs-source-dirs:      src
-  build-depends:       base >=4.10
+--   build-depends:       base >=4.10
-                     , classy-prelude
+--                      , classy-prelude
-                     , dhall
+--                      , foreign-store
-                     , foreign-store
+--                      , generic-lens
-                     , generic-lens
+--                      , lens
-                     , lens
+--                      , mtl
-                     , mtl
+--                      , text
-                     , text
+--                      , transformers
-                     , transformers
+--                      , validity
-                     , validity
+--                      , genvalidity-hspec
-                     , genvalidity-hspec
+--                      , genvalidity-property
-                     , genvalidity-property
+--                      , hspec
-                     , hspec

config/Configuration.dhall

@@ -0,0 +1,8 @@
+{ database : { username : Text
+             , password : Text
+             , host : Text
+             , database : Text
+             , migrations : Text }
+, store : < Filestore : { path : Text } | IPFS : { common : Text } >
+, port : Integer
+}

config/config.dhall.sample

@@ -4,5 +4,7 @@
     , password = "password"
     , host = "hostname"
     , database = "ebook"
+    , migrations = "./migrations"
   }
+  store = { path = "/tmp/store" }
 }

default.nix

@@ -1,12 +1,59 @@
 { nixpkgs, haskellPackages }:
 
+let
+  miso = nixpkgs.fetchFromGitHub {
+    owner = "dmjio";
+    repo = "miso";
+    rev = "630e823dd40a434b73124e12b229a79d9fefb01d";
+    sha256 = "046gdp3ah2lsipfcy89rh20mn08xbhcgrj549v8zzy69j33xjm2l";
+  };
+  miso-jsaddle = super: if haskellPackages.ghc.isGhcjs or false then (super.callPackage (miso + "/miso-ghcjs.nix") {}) else (super.callPackage (miso + "/miso-ghc-jsaddle.nix") {});
+
+  dontCheck = nixpkgs.haskell.lib.dontCheck;
+
+in
+
 (import ./project.nix nixpkgs) {
+  haskellPackages = haskellPackages;
   packages = {
     common = ./common;
     backend = ./backend;
+    frontend = ./frontend;
   };
   overrides = self: super: {
     generic-lens = nixpkgs.haskell.lib.dontCheck super.generic-lens;
+    miso = miso-jsaddle super;
+    # doctest = null; # Not compilable with ghcjs
+    # comonad = dontCheck super.comonad;
+    # Glob = dontCheck super.Glob;
+    # SHA = dontCheck super.SHA;
+    # iproute = dontCheck super.iproute;
+    # semigroupoids = dontCheck super.semigroupoids;
+    # wai-app-static = dontCheck super.wai-app-static;
+    # attoparsec = dontCheck super.attoparsec;
+    # http-date = dontCheck super.http-date;
+    # lens = dontCheck super.lens;
+    # unix-time = dontCheck super.unix-time;
+    # http-types = dontCheck super.http-types;
+    # servant = dontCheck super.servant;
+    # servant-server = dontCheck super.servant-server;
+    # servant-auth-docs = dontCheck super.servant-auth-docs;
+    # lens-aeson = dontCheck super.lens-aeson;
+    # word8 = dontCheck super.word8;
+    # http2 = dontCheck super.http2;
+    # wai-extra = dontCheck super.wai-extra;
+    # pgp-wordlist = dontCheck super.pgp-wordlist;
+    # prettyprinter = dontCheck super.prettyprinter;
+    # unliftio = dontCheck super.unliftio;
+    # prettyprinter-ansi-terminal = dontCheck super.prettyprinter-ansi-terminal;
+    # distributive = dontCheck super.distributive;
+    # genvalidity-property = dontCheck super.genvalidity-property;
+    # genvalidity-hspec = dontCheck super.genvalidity-hspec;
+    # genvalidity = dontCheck super.genvalidity;
+    # megaparsec = dontCheck super.megaparsec;
+    # ncurses = null;
+    # haskeline = super.callHackage "haskeline" "0.7.4.2" {};
+    # terminfo = super.callHackage "terminfo" "0.4.1.1" {};
   };
   tools = with haskellPackages; [
     ghcid

frontend/ChangeLog.md

@@ -0,0 +1,5 @@
+# Revision history for frontend
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.

frontend/LICENSE

@@ -0,0 +1,30 @@
+Copyright (c) 2018, Mats Rauhala
+
+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 Mats Rauhala 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.

frontend/Setup.hs

@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain

frontend/frontend.cabal

@@ -0,0 +1,32 @@
+-- Initial frontend.cabal generated by cabal init.  For further
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                frontend
+version:             0.1.0.0
+-- synopsis:
+-- description:
+license:             BSD3
+license-file:        LICENSE
+author:              Mats Rauhala
+maintainer:          mats.rauhala@iki.fi
+-- copyright:
+category:            Web
+build-type:          Simple
+extra-source-files:  ChangeLog.md
+cabal-version:       >=1.10
+
+executable frontend
+  main-is:             Main.hs
+  -- other-modules:
+  -- other-extensions:
+  build-depends:       base >=4.11 && <4.12
+                     , common
+                     , generic-lens
+                     , jsaddle-warp
+                     , lens
+                     , miso
+                     , mtl
+                     , servant
+  hs-source-dirs:      src
+  default-language:    Haskell2010
+  ghc-options:         -Wall

frontend/src/Main.hs

@@ -0,0 +1,93 @@
+{-# LANGUAGE DataKinds                  #-}
+{-# LANGUAGE DeriveGeneric              #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE LambdaCase                 #-}
+{-# LANGUAGE OverloadedStrings          #-}
+{-# LANGUAGE ScopedTypeVariables          #-}
+{-# LANGUAGE RecordWildCards            #-}
+{-# LANGUAGE TypeApplications           #-}
+{-# LANGUAGE TypeOperators              #-}
+{-# LANGUAGE GADTs              #-}
+module Main where
+
+import           Control.Lens                     (over, set)
+import           Control.Monad.Trans              (liftIO)
+import           Data.Generics.Product
+import           GHC.Generics                     (Generic)
+import           Language.Javascript.JSaddle.Warp
+import           Miso                             hiding (set)
+import           Miso.String
+import           Servant.API
+import           Servant.Links
+import Data.Proxy (Proxy(..))
+
+type API = Home :<|> Login :<|> Register
+type Home = View Action
+type Login = "login" :> View Action
+type Register = "register" :> View Action
+
+data Action = Add
+            | Subtract
+            | SayHello
+            | HandleURI URI
+            | ChangeURI URI
+            | NoOp
+
+data Model = Model { counter :: Int
+                   , uri     :: URI }
+  deriving (Eq, Generic)
+
+updateModel :: Model -> Action -> Effect Action Model
+updateModel m = \case
+  Add -> noEff (over (field @"counter") (+1) m)
+  Subtract -> noEff (over (field @"counter") (\x -> x - 1) m)
+  SayHello -> m <# (liftIO (putStrLn "Hello world") >> pure NoOp)
+  HandleURI uri -> noEff (set (field @"uri") uri m)
+  ChangeURI uri -> m <# do
+    liftIO $ putStrLn $ "Pushing uri " <> show uri
+    pushURI uri
+    return $ HandleURI uri
+  NoOp -> noEff m
+
+viewModel :: Model -> View Action
+viewModel model = view
+  where
+    view = either (const the404) id $ runRoute @API Proxy handlers uri model
+    handlers = home :<|> login :<|> register
+    home _ = div_ [] [ button_  [ onClick Add ] [ text "+" ]
+              , text (ms (counter model))
+              , button_ [ onClick Subtract ] [ text "-" ]
+              , button_ [ onClick goLogin ] [ text "go login" ]
+              , button_ [ onClick goRegister ] [ text "go register" ]
+            ]
+    login _ = div_ [] []
+    register _ = div_ [] [
+        h3_ [] [text "register"]
+      , label_ [] [text "Username"], input_ [id_ "username", name_ "username"]
+      , label_ [] [text "Email"], input_ [id_ "email", name_ "email"]
+      , label_ [] [text "Password"], input_ [id_ "password", name_ "password"]
+      , label_ [] [text "Password again"], input_ [id_ "passwordAgain", name_ "passwordAgain"]
+      , button_ [] [text "Register"]
+      ]
+    the404 = div_ [] []
+
+goLogin, goHome, goRegister :: Action
+goLogin = goto @Login @API Proxy Proxy
+goHome = goto @Home @API Proxy Proxy
+goRegister = goto @Register @API Proxy Proxy
+
+goto :: (IsElem endpoint api, HasLink endpoint, MkLink endpoint Link ~ Link) => Proxy api -> Proxy endpoint -> Action
+goto a b = ChangeURI (linkURI (safeLink a b))
+
+main :: IO ()
+main = run 8081 $ do
+  model <- mkModel
+  startApp App{..}
+  where
+    mkModel = Model <$> pure 0 <*> getCurrentURI
+    initialAction = SayHello
+    update = flip updateModel
+    view = viewModel
+    subs = [ uriSub HandleURI ]
+    events = defaultEvents
+    mountPoint = Nothing

ghcjs.patch

@@ -0,0 +1,16 @@
+diff --git a/lib/boot/shims/src/string.js b/lib/boot/shims/src/string.js
+index d82f75a..f16e55a 100644
+--- a/lib/boot/shims/src/string.js
++++ b/lib/boot/shims/src/string.js
+@@ -780,11 +780,7 @@ function h$throwJSException(e) {
+   // adding the Exception dictionary
+   var strVal = e.toString() + '\n' + Array.prototype.join.call(e.stack, '\n');
+   var someE = MK_SOMEEXCEPTION(HS_JSEXCEPTION_EXCEPTION,
+-#ifdef GHCJS_PROF
+-                               MK_JSEXCEPTION(MK_JSVAL(e), h$toHsString(strVal), h$CCS_SYSTEM))
+-#else
+                                MK_JSEXCEPTION(MK_JSVAL(e), h$toHsString(strVal))
+-#endif
+                               );
+   return h$throw(someE, true);
+ }

jsaddle-warp-ghcjs.nix

@@ -0,0 +1,14 @@
+{ mkDerivation, base, fetchgit, stdenv }:
+mkDerivation {
+  pname = "jsaddle-warp";
+  version = "0.9.5.0";
+  src = fetchgit {
+    url = "https://github.com/ghcjs/jsaddle.git";
+    rev = "34fe7d61b3f387b81aa748294ac8d993243f53b4";
+    sha256 = "0qdh5qdk23vcp1yp910zgw2hs4zpbx9ig25xgaax0iwj2m1ifh5x";
+  };
+  postUnpack = "sourceRoot+=/jsaddle-warp; echo source root reset to $sourceRoot";
+  libraryHaskellDepends = [ base ];
+  description = "Interface for JavaScript that works with GHCJS and GHC";
+  license = stdenv.lib.licenses.mit;
+}

nixpkgs-version.json

@@ -1,7 +1,7 @@
 {
   "url": "https://github.com/nixos/nixpkgs.git",
-  "rev": "e0d250e5cf6d179e1ccc775472d89718f61fcfd1",
+  "rev": "4507926b80c6b8f73053775ffee17f6781c7e7c8",
   "date": "2018-01-08T11:52:28+01:00",
-  "sha256": "1iqpjz4czcpghbv924a5h4jvfmj6c8q6sl3b1z7blz3mi740aivs",
+  "sha256": "068v9xh7d8klk62p2qwr76fyfqfh1bp08xc12x138g5q6pg6yfzb",
   "fetchSubmodules": true
 }

project.nix

@@ -6,7 +6,8 @@ let
 
 in
 
-{ packages
+{ haskellPackages
+, packages
 , overrides ? _ : _ : {}
 , tools ? []
 }:
@@ -17,12 +18,17 @@ let
     (self: super: mapAttrs (name: path: self.callCabal2nix name path {}) packages)
     overrides
   ];
-  haskellPackages = nixpkgs.haskellPackages.override { overrides = overrides'; };
+  haskellPackages' = haskellPackages.extend overrides';
-  packages' = mapAttrs (name: _: haskellPackages."${name}") packages;
+  packages' = mapAttrs (name: _: haskellPackages'."${name}") packages;
   mkShell = name: pkg:
   let
     n =  "${name}-shell";
-    deps = haskellPackages.ghcWithHoogle (pkgs: pkg.buildInputs ++ pkg.propagatedBuildInputs);
+    deps = with haskellPackages'; [
+      ghcid
+      cabal-install
+      hasktags
+      (haskellPackages'.ghcWithHoogle (pkgs: pkg.buildInputs ++ pkg.propagatedBuildInputs))
+    ];
   in
   {
     name = "${n}";

release.nix

@@ -2,14 +2,71 @@
 
 let
 
+  jsaddle = nixpkgs.fetchFromGitHub {
+    owner = "ghcjs";
+    repo = "jsaddle";
+    rev = "34fe7d61b3f387b81aa748294ac8d993243f53b4";
+    sha256 = "0qdh5qdk23vcp1yp910zgw2hs4zpbx9ig25xgaax0iwj2m1ifh5x";
+  };
+  config = {
+    packageOverrides = pkgs: with pkgs.haskell.lib;  with pkgs.lib; {
+      haskell = pkgs.haskell // {
+        packages = pkgs.haskell.packages // {
+          ghccustom = pkgs.haskell.packages.ghc843.override {
+            overrides = self: super: {
+              jsaddle-warp = dontCheck (super.callPackage (jsaddle + "/jsaddle-warp") {});
+              # jsaddle-warp = super.callPackage ./jsaddle-warp-ghcjs.nix {};
+              jsaddle = dontCheck (super.callPackage (jsaddle + "/jsaddle") {});
+            };
+          };
+          ghcjscustom = pkgs.haskell.packages.ghcjs84.override {
+            overrides = self: super: {
+              doctest = null;
+              comonad = dontCheck (super.comonad);
+              classy-prelude = dontCheck (super.classy-prelude);
+              unliftio = dontCheck (super.unliftio);
+              semigroupoids = dontCheck (super.semigroupoids);
+              lens = dontCheck (super.lens);
+              directory-tree = dontCheck (super.directory-tree);
+              http-types = dontCheck (super.http-types);
+              tasty-quickcheck = dontCheck (super.tasty-quickcheck);
+              scientific = dontCheck (super.scientific);
+              servant = dontCheck (super.servant);
+              jsaddle-warp = super.callPackage ./jsaddle-warp-ghcjs.nix {};
+              ghc = overrideDerivation (super.ghc.override {
+                ghcjsSrc = pkgs.fetchgit {
+                  url = "https://github.com/ghcjs/ghcjs.git";
+                  rev = "dc190b1bb2453cfa484124e9f335ee3cad1492f7";
+                  sha256 = "0dh52gj0f3700zfyrhisy44b6y9p1bsawwrmd5pllpdyw21zd9lw";
+                  fetchSubmodules = true;
+                };
+              }) (drv: { patches = (drv.patches or []) ++ [ ./ghcjs.patch ]; });
+            };
+          };
+        };
+      };
+    };
+  };
   pinnedVersion = nixpkgs.lib.importJSON ./nixpkgs-version.json;
   pinnedPkgs = import (nixpkgs.fetchFromGitHub {
     owner = "NixOS";
     repo = "nixpkgs";
     inherit (pinnedVersion) rev sha256;
-  }) {};
+  }) { inherit config; };
+  ghc = import ./default.nix { nixpkgs = pinnedPkgs; haskellPackages = pinnedPkgs.haskell.packages.ghccustom; };
+  ghcjs = import ./default.nix { nixpkgs = pinnedPkgs; haskellPackages = pinnedPkgs.haskell.packages.ghcjscustom; };
   inherit (pinnedPkgs) pkgs;
 
   in
 
-import ./default.nix { nixpkgs = pinnedPkgs; haskellPackages = pinnedPkgs.haskellPackages; }
+{
+  inherit ghc ghcjs;
+  deps = pkgs.buildEnv {
+    name = "deps";
+    paths = [
+      (pkgs.haskell.packages.ghccustom.ghcWithPackages (_: ghc.backend.buildInputs ++ ghc.backend.propagatedBuildInputs))
+      (pkgs.haskell.packages.ghcjscustom.ghcWithPackages (_: ghcjs.frontend.buildInputs ++ ghcjs.frontend.propagatedBuildInputs))
+    ];
+    buildInputs = [ ];
+  };
+}

to-flyway.dhall

@@ -0,0 +1,8 @@
+\(conf : ./config/Configuration.dhall)
+->
+''
+flyway.locations=filesystem:${conf.database.migrations}/
+flyway.url=jdbc:postgresql://${conf.database.host}/${conf.database.database}
+flyway.user=${conf.database.username}
+flyway.password=${conf.database.password}
+''