Replace clone command with the check command

slackbuilder.cabal

@@ -96,3 +96,5 @@ test-suite slackbuilder-test
     slackbuilder
 
   ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
+  build-tool-depends:
+    hspec-discover:hspec-discover

src/Main.hs

@@ -256,12 +256,21 @@ up2Date = for_ autoUpdatable go
     go package = getAndLogLatest package
         >>= mapM_ (updatePackageIfRequired package)
         >> liftIO (putStrLn "")
-    getAndLogLatest Package{ latest = Package.Updater{ detectLatest }, name }
-        = liftIO (putStrLn $ Text.unpack name <> ": Retreiving the latest version.")
-        >> detectLatest
 
-updatePackageIfRequired :: Package -> Text -> SlackBuilderT ()
-updatePackageIfRequired package@Package{..} version = do
+check :: SlackBuilderT ()
+check = for_ autoUpdatable go
+  where
+    go package = getAndLogLatest package
+        >>= mapM_ (checkUpdateAvailability package)
+        >> liftIO (putStrLn "")
+
+getAndLogLatest :: Package -> SlackBuilderT (Maybe Text)
+getAndLogLatest Package{ latest = Package.Updater{ detectLatest }, name }
+    = liftIO (putStrLn $ Text.unpack name <> ": Retreiving the latest version.")
+    >> detectLatest
+
+checkUpdateAvailability :: Package -> Text -> SlackBuilderT (Maybe PackageInfo)
+checkUpdateAvailability Package{..} version = do
     let packagePath = Text.unpack category </> Text.unpack name </> (Text.unpack name <.> "info")
     repository' <- SlackBuilderT $ asks repository
     infoContents <- liftIO $ ByteString.readFile $ repository' </> packagePath
@@ -274,7 +283,8 @@ updatePackageIfRequired package@Package{..} version = do
                     Text.IO.putStrLn
                         $ name <> " is up to date (Version " <> version <> ")."
                     setSGR [Reset]
-            | otherwise -> do
+                    pure Nothing
+            | otherwise ->
                 liftIO $ do
                     setSGR [SetColor Foreground Dull Yellow]
                     Text.IO.putStrLn
@@ -282,8 +292,14 @@ updatePackageIfRequired package@Package{..} version = do
                         <> name <> " " <> getField @"version" parsedInfoFile
                         <> " is available (" <> version <> ")."
                     setSGR [Reset]
-                updatePackage package parsedInfoFile version
-        Left errorBundle -> liftIO $ putStr $ errorBundlePretty errorBundle
+                    pure $ Just parsedInfoFile
+        Left errorBundle -> liftIO (putStr $ errorBundlePretty errorBundle)
+            >> pure Nothing
+
+updatePackageIfRequired :: Package -> Text -> SlackBuilderT ()
+updatePackageIfRequired package version
+    = checkUpdateAvailability package version
+    >>= mapM_ (updatePackage package version)
 
 updateDownload :: Package -> Package.Updater -> SlackBuilderT (Package.Download, Text)
 updateDownload Package{..} Package.Updater{..} = do
@@ -369,8 +385,8 @@ renderAndDownload Package{..} version = do
 
     getVersion packagePath version
 
-updatePackage :: Package -> PackageInfo -> Text -> SlackBuilderT ()
-updatePackage package@Package{..} info version = do
+updatePackage :: Package -> Text -> PackageInfo -> SlackBuilderT ()
+updatePackage package@Package{..} version info = do
     let packagePath = category <> "/" <> name
 
     repository' <- SlackBuilderT $ asks repository
@@ -416,6 +432,5 @@ main = do
             categories <- liftIO $ findCategory repository'
             liftIO $ print $ splitFileName . makeRelative repository' <$> categories
             pure Nothing
-        CloneCommand repo tarball tagPrefix -> fmap (Text.pack . show)
-            <$> clone repo tarball tagPrefix
+        CheckCommand -> check >> pure Nothing
         Up2DateCommand -> up2Date >> pure Nothing

src/SlackBuilder/CommandLine.hs

@@ -21,7 +21,7 @@ import Options.Applicative
 
 data SlackBuilderCommand
     = CategoryCommand Text
-    | CloneCommand Text Text Text
+    | CheckCommand
     | Up2DateCommand
 
 data PackagistArguments = PackagistArguments
@@ -46,13 +46,10 @@ slackBuilderParser = info slackBuilderCommand fullDesc
 slackBuilderCommand :: Parser SlackBuilderCommand
 slackBuilderCommand = subparser
     $ command "category" (info categoryCommand mempty)
-    <> command "clone" (info cloneCommand mempty)
+    <> command "check" (info checkCommand mempty)
     <> command "up2date" (info up2DateCommand mempty)
   where
     categoryCommand = CategoryCommand
         <$> argument str (metavar "PKGNAM")
-    cloneCommand = CloneCommand
-        <$> argument str (metavar "REPO")
-        <*> argument str (metavar "TARBALL")
-        <*> argument str (metavar "TAG_PREFIX")
+    checkCommand = pure CheckCommand
     up2DateCommand = pure Up2DateCommand