Make version picker a command

lib/SlackBuilder/Config.hs

@@ -35,7 +35,7 @@ data PackageSettings = PackageSettings
     , is64 :: Bool
     , github :: Maybe (Text, Text)
     , packagist :: Maybe (Text, Text)
-    , text :: Maybe Text
+    , text :: Maybe (Text, [String])
     } deriving (Eq, Show)
 
 settingsCodec :: Toml.TomlCodec Settings
@@ -57,6 +57,10 @@ packageSettingsCodec = PackageSettings
     <$> Toml.text "name" .= name
     <*> Toml.text "template" .= template
     <*> Toml.bool "is64" .= is64
-    <*> Toml.dioptional (flip Toml.table "github" $ Toml.pair (Toml.text "owner") (Toml.text "name")) .= github
-    <*> Toml.dioptional (flip Toml.table "packagist" $ Toml.pair (Toml.text "owner") (Toml.text "name")) .= packagist
-    <*> Toml.dioptional (flip Toml.table "text" $ Toml.text "url") .= text
+    <*> Toml.dioptional (Toml.table githubCodec "github") .= github
+    <*> Toml.dioptional (Toml.table packagistCodec "packagist") .= packagist
+    <*> Toml.dioptional (Toml.table textCodec "text")  .= text
+  where
+    githubCodec = Toml.pair (Toml.text "owner") (Toml.text "name")
+    packagistCodec = Toml.pair (Toml.text "owner") (Toml.text "name")
+    textCodec = Toml.pair (Toml.text "url") (Toml.arrayOf Toml._String "picker")

lib/SlackBuilder/LatestVersionCheck.hs

@@ -49,8 +49,10 @@ import Control.Monad.IO.Class (MonadIO(..))
 import Data.Char (isAlpha)
 import SlackBuilder.Download (responseBodySource, reqGet)
 import Network.HTTP.Client (BodyReader, Response(..))
-import Conduit (await)
-import Data.Conduit.Process (sourceCmdWithStreams)
+import Conduit (decodeUtf8C, (.|), linesUnboundedC, sinkNull)
+import qualified Data.Conduit.List as CL
+import Data.Conduit.Process (sourceProcessWithStreams, proc)
+import Data.Maybe (listToMaybe)
 
 data PackageOwner = PackageOwner
     { owner :: Text
@@ -195,27 +197,29 @@ latestPackagist PackageOwner{..} = do
 -- * Remote text file
 
 data TextArguments = TextArguments
-    { versionPicker :: Either (Text -> Text) [Text]
-    , textURL :: Text
+    { textURL :: Text
+    , versionPicker :: [String]
     }
 
 latestText :: TextArguments -> SlackBuilderT (Maybe Text)
 latestText TextArguments{..} = do
     case versionPicker of
-        Left versionPicker' -> do
+        (command : arguments) -> do
+            uri' <- mkURI textURL
+            runReq defaultHttpConfig $ reqGet uri' $ readResponse command arguments
+        [] -> do
             uri <- liftIO $ useHttpsURI <$> mkURI textURL
 
             packagistResponse <- traverse (runReq defaultHttpConfig . go . fst) uri
-            pure $ versionPicker' . Text.Encoding.decodeUtf8 . Network.HTTP.Req.responseBody
+            pure $ Text.strip . Text.Encoding.decodeUtf8 . Network.HTTP.Req.responseBody
                 <$> packagistResponse
-        Right _ -> do
-            uri' <- mkURI textURL
-            runReq defaultHttpConfig $ reqGet uri' readResponse
   where
-    readResponse :: Response BodyReader -> IO (Maybe Text)
-    readResponse response = do
-        (_, stdout', _) <- sourceCmdWithStreams "grep -oh 'Linux—[[:digit:].]\\+'" (responseBodySource response) await (pure ())
-        pure $ Text.drop 6 . head . Text.lines . Text.Encoding.decodeUtf8 <$> stdout'
+    readResponse :: String -> [String] -> Response BodyReader -> IO (Maybe Text)
+    readResponse command arguments response = do
+        let createProcess' = proc command arguments
+        (_, stdout', _) <- sourceProcessWithStreams createProcess' (responseBodySource response) stdoutReader sinkNull
+        pure $ Text.drop 6 <$> listToMaybe stdout'
+    stdoutReader = decodeUtf8C .| linesUnboundedC .| CL.consume
     go uri = req GET uri NoReqBody bsResponse mempty
 
 -- * GitHub

src/Main.hs

@@ -17,7 +17,6 @@ import SlackBuilder.LatestVersionCheck
 import SlackBuilder.Update
 import qualified Toml
 import Data.Text (Text)
-import qualified Data.Text as Text
 import qualified Data.Text.IO as Text
 import Control.Monad.Trans.Reader (ReaderT(..), asks)
 import SlackBuilder.Package (PackageDescription(..))
@@ -117,10 +116,7 @@ autoUpdatable packageSettings =
         }
     , PackageDescription
         { latest =
-            let textArguments = TextArguments
-                    { textURL = fromJust $ getField @"text" setting
-                    , versionPicker = Right ["grep", "-oh", "Linux—[[:digit:].]\\+"]
-                    }
+            let textArguments = uncurry TextArguments $ fromJust $ getField @"text" setting
                 setting = fromJust $ find ((== "webex") . getField @"name") packageSettings
                 template = Package.DownloadTemplate $ getField @"template" setting
              in Package.Updater
@@ -146,10 +142,7 @@ autoUpdatable packageSettings =
         }
     , PackageDescription
         { latest =
-            let textArguments = TextArguments
-                    { textURL = fromJust $ getField @"text" setting
-                    , versionPicker = Left Text.strip
-                    }
+            let textArguments = uncurry TextArguments $ fromJust $ getField @"text" setting
                 setting = fromJust $ find ((== "dmd") . getField @"name") packageSettings
                 template = Package.DownloadTemplate $ getField @"template" setting
              in Package.Updater
@@ -162,10 +155,7 @@ autoUpdatable packageSettings =
         }
     , PackageDescription
         { latest =
-            let textArguments = TextArguments
-                    { textURL = fromJust $ getField @"text" setting
-                    , versionPicker = Left Text.strip
-                    }
+            let textArguments = uncurry TextArguments $ fromJust $ getField @"text" setting
                 setting = fromJust $ find ((== "d-tools") . getField @"name") packageSettings
                 template = Package.DownloadTemplate $ getField @"template" setting
              in Package.Updater