55 - Refactor to use same Atom setup implementation on all Linux distributions

Author: freeman42x

src/OS/Common.hs

@@ -15,6 +15,9 @@ import qualified Turtle                        as T
 isExecutableInPath :: T.FilePath -> IO Bool
 isExecutableInPath name = isJust <$> T.which name
 
+isNixInstalled :: IO Bool
+isNixInstalled = isExecutableInPath "nix"
+
 isGhcInstalled :: IO Bool
 isGhcInstalled = isExecutableInPath "ghc"
 
@@ -28,11 +31,16 @@ data NixConfiguration
   = User | NixOS deriving (Eq, Show)
 
 doesFileExist' :: FilePath -> IO Bool
-doesFileExist' path
-  | "~" `isPrefixOf` path = do
+doesFileExist' filePath = do
+  fullFilePath <- toFullFilePath filePath
+  doesFileExist fullFilePath
+
+toFullFilePath :: FilePath -> IO FilePath
+toFullFilePath filePath
+  | "~" `isPrefixOf` filePath = do
     homepath <- getHomeDirectory
-    doesFileExist $ homepath ++ RU.tail path
-  | otherwise = doesFileExist path
+    return $ homepath ++ RU.tail filePath
+  | otherwise = return filePath
 
 getExistingNixConfigurations :: IO [NixConfiguration]
 getExistingNixConfigurations = map fst <$> filterM

src/OS/Linux.hs

@@ -52,12 +52,20 @@ logStep text sink actions = do
   appendLog ("END   : " <> text) sink
 
 configureNix :: Bool -> Sink Action -> IO ()
-configureNix run sink = undefined
+configureNix run sink = do
+  isNixInstalled' <- isNixInstalled
+  if isNixInstalled'
+    then
+      appendLog "Nix is already installed" sink
+    else
+      logStep "Installing Nix" sink (when run $ do
+      _ <- runShellCommand "curl -L https://nixos.org/nix/install | sh"
+      return ())
 
 configureNixPackage :: Bool -> Sink Action -> ExtensionInfo -> IO ()
 configureNixPackage run sink (ExtensionInfo name package) = do
   nixConfiguration <- getOptimalNixConfiguration
-  let configurationNixFilePath = unpack $ getNixConfigurationPath nixConfiguration
+  configurationNixFilePath <- toFullFilePath $ unpack $ getNixConfigurationPath nixConfiguration
   oldConfigurationNixText <- liftIO $ readFile configurationNixFilePath
 
   -- FIXME vvv requires Nix parsing using HNIX