Remove redundant entry point; adjust comments in main init; update init function names from 'main'

Purr.cabal

@@ -16,8 +16,7 @@ extra-source-files:
 executable Purr
   main-is: Main.hs
   hs-source-dirs:
-      app
-      , src
+      src
   default-extensions:
       ConstraintKinds
       DeriveGeneric
@@ -64,5 +63,4 @@ executable Purr
     Feature.Sharing.HTTP
     Feature.Sharing.SQLite
     Feature.Sharing.Templates
-    Lib
   default-language: Haskell2010

app/Main.hs

@@ -1,7 +0,0 @@
-module Main where
-
-import Prelude
-import qualified Lib
-
-main :: IO ()
-main = Lib.main

src/Core/Configuration.hs

@@ -1,21 +1,22 @@
 module Core.Configuration ( adminEmail, appPort 
                           , confLinkLength, dataPath, dbPath
                           , encKey, getRuntimeEnvironment 
-                          , keyFileInit, main) where 
+                          , keyFileInit, init) where 
 
 import qualified Data.ByteString               as B
 
 import           Control.Monad                 (mapM)
+import           Configuration.Dotenv
 import           Core.Types
 import           Crypto.Saltine.Core.SecretBox (newKey)
 import           Crypto.Saltine.Class          (encode)
-import           Configuration.Dotenv
+import           Prelude                hiding (init)
 import           System.Directory              (doesFileExist)
 import           System.Environment            (getEnv, lookupEnv)
 
 -- Load environment variables from dotenv file if required
-main :: IO ()
-main = do
+init :: IO ()
+init = do
   reqEnvLookup <- getRequiredEnv
   if (Nothing `elem` reqEnvLookup)
     then checkEnvFile requiredEnvVars

src/Core/SQLite.hs

@@ -6,12 +6,13 @@ import           Core.Types
 import           Data.ByteString                as B
 import           Database.SQLite.Simple
 import           Database.SQLite.Simple.FromRow
+import           Prelude                 hiding (init)
 
 import qualified Data.Text                      as T
 
 -- Set up SQLite database table when Purr starts if it doesn't already exist
-main :: IO ()
-main = do
+init :: IO ()
+init = do
   conn <- open dbPath
   execute_ conn
     "CREATE TABLE IF NOT EXISTS pws\

src/Main.hs

@@ -1,4 +1,4 @@
-module Lib ( main ) where
+module Main ( main ) where
 
 import qualified Core.Configuration            as Configuration
 import qualified Core.HTTP                     as HTTP
@@ -16,17 +16,16 @@ main = do
   -- Initialize the RNG used for sodium encryption (Saltine library)
   sodiumInit 
   {- Initialize our dotenv configuration which reads from a .env configuration
-     file unless the PURRNOFILE env var exists already. -}
-  Configuration.main 
+     if any required variables are missing from the provided environment -}
+  Configuration.init
   {- Initialize the encryption key file if it doesn't
      exist yet or use the existing key -}
   Configuration.keyFileInit 
   {- Initialize our database by ensuring the SQLite file exists
      and has tables setup as the application expects -}
-  DB.main
+  DB.init
   {- Get the configured port to run on and start the Scotty webserver app
      defined in HTTP.app -}
-  appPortStr <- Configuration.appPort
+  port <- Configuration.appPort
   env <- Configuration.getRuntimeEnvironment
-  let appPort = read appPortStr :: Int
-  scotty appPort (HTTP.app env)
+  scotty (read port) (HTTP.app env)