# Free deployment to Heroku.
#
#   !! Warning: You must use a 64 bit machine to compile !!
#
#   This could mean using a virtual machine. Give your VM as much memory as you can to speed up linking.
#
# Basic Yesod setup:
#
# * Move this file out of the deploy directory and into your root directory
#
#     mv deploy/Procfile ./
#
# * Create an empty package.json
#     echo '{ "name": "~project~", "version": "0.0.1", "dependencies": {} }' >> package.json
# 
# Postgresql Yesod setup:
#
# * add code to read the DATABASE_URL environment variable.
# 
#   import System.Environment
#   main = do
#     # parse env variable
#     durl <- getEnv "DATABASE_URL"
#     # pass settings to withConnectionPool instead of directly using loadConnStr
#     defaultMain (fromArgsExtra loadExtra) withYesodHeroku
#
# * add a dependency on the "heroku" package in your cabal file
#     
# * add code in Application.hs to turn the url into connection parameters. The below works for Postgresql.
#
#     #ifdef !DEVELOPMENT
#     import qualified Web.Heroku
#     #endif
#
#
#     canonicalizeKey :: (Text, val) -> (Text, val)
#     canonicalizeKey ("dbname", val) = ("database", val)
#     canonicalizeKey pair = pair
#
#     toMapping :: [(key, val)] -> DO.Object key val
#     toMapping = DO.Mapping . map (\(key, val) -> (key, DO.Scalar val))
#
#     combineMappings :: DO.Object key val -> DO.Object key val -> DO.Object key val
#     combineMappings (DO.Mapping m1) (DO.Mapping m2) = DO.Mapping $ m1 ++ m2
#     combineMappings _ _ = error "Data.Object is not a Mapping."
#
#     loadHerokuConfig :: DO.TextObject -> IO Settings.PersistConfig
#     loadHerokuConfig ymlenv = do
#     #if DEVELOPMENT
#       let urlMap = DO.Mapping []
#     #else
#       urlMap <- Web.Heroku.dbConnParams >>= return . toMapping . map canonicalizeKey
#     #endif
#       either error return $ Database.Persist.Base.loadConfig (combineMappings urlMap ymlenv)
#
#
#     withYesodHeroku :: AppConfig DefaultEnv () -> Logger -> (Application -> IO ()) -> IO ()
#     withYesodHeroku conf logger f = do
#        s <- staticSite
#        dbconf <- withYamlEnvironment "config/postgresql.yml" (appEnv conf) loadHerokuConfig
#        Database.Persist.Base.withPool (dbconf :: Settings.PersistConfig) $ \p -> do
#            Database.Persist.Base.runPool dbconf (runMigration migrateAll) p
#            let h = YesodHeroku conf logger s p
#            defaultRunner (f . logWare) h
#      where
#     #ifdef DEVELOPMENT
#        logWare = logStdoutDev
#     #else
#        logWare = logStdout
#     #endif



# Heroku setup:
# Find the Heroku guide. Roughly:
#
# * sign up for a heroku account and register your ssh key
# * create a new application on the *cedar* stack
#
# * make your Yesod project the git repository for that application
# * create a deploy branch
#
#     git checkout -b deploy
#
# Repeat these steps to deploy:
# * add your web executable binary (referenced below) to the git repository
#
#     git checkout deploy
#     git add ./dist/build/~project~/~project~
#     git commit -m deploy
#
# * push to Heroku
#
#     git push heroku deploy:master


# Heroku configuration that runs your app
web: ./dist/build/~project~/~project~ production -p $PORT