Recognize + in sematnic tags

3 files changed, 269 insertions, 428 deletions

diff --git a/src/Main.hs b/src/Main.hs
index fb3a814..b51d4cd 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -7,66 +7,28 @@ module Main
     ) where
 
 import Data.Char (isNumber)
-import Control.Applicative (Applicative(liftA2))
+import Control.Applicative (Applicative(..))
 import Data.List.NonEmpty (NonEmpty(..))
-import qualified Data.List.NonEmpty as NonEmpty
 import Control.Monad.Catch (MonadThrow(..))
 import Control.Monad.IO.Class (MonadIO(..))
-import Data.Maybe (fromJust, fromMaybe)
 import qualified Data.Map as Map
 import Options.Applicative (execParser)
 import SlackBuilder.CommandLine
 import SlackBuilder.Config
 import SlackBuilder.Trans
 import SlackBuilder.LatestVersionCheck
+import SlackBuilder.Update
 import qualified Toml
-import qualified Data.ByteString as ByteString
 import Data.Text (Text)
 import qualified Data.Text as Text
 import qualified Data.Text.IO as Text.IO
-import Control.Monad.Trans.Reader (ReaderT(..), asks)
-import SlackBuilder.Download
-import SlackBuilder.Package (PackageDescription(..), PackageUpdateData(..))
+import Control.Monad.Trans.Reader (ReaderT(..))
+import SlackBuilder.Package (PackageDescription(..))
 import qualified SlackBuilder.Package as Package
-import Text.URI (URI(..), mkURI)
 import Text.URI.QQ (uri)
-import Data.Foldable (Foldable(..), for_, find)
-import qualified Text.URI as URI
-import System.FilePath
-    ( (</>)
-    , (<.>)
-    , dropExtension
-    , takeBaseName
-    , splitFileName
-    , takeDirectory
-    , takeFileName
-    , dropTrailingPathSeparator
-    )
-import SlackBuilder.Info
-import Text.Megaparsec (parse, errorBundlePretty)
+import Data.Foldable (for_, find)
 import GHC.Records (HasField(..))
-import System.Process
-    ( CmdSpec(..)
-    , CreateProcess(..)
-    , StdStream(..)
-    , withCreateProcess
-    , waitForProcess
-    )
-import System.Console.ANSI
-    ( setSGR
-    , SGR(..)
-    , ColorIntensity(..)
-    , Color(..)
-    , ConsoleLayer(..)
-    )
-import System.Directory (listDirectory, doesDirectoryExist, withCurrentDirectory, removeDirectoryRecursive)
-import Control.Monad (filterM, void)
-import Data.List (isPrefixOf, isSuffixOf, partition)
-import Conduit (runConduitRes, (.|), yield)
-import Data.Functor ((<&>))
-import Data.Bifunctor (Bifunctor(..))
-import Data.Conduit.Tar (tarFilePath)
-import qualified Data.Conduit.Lzma as Lzma
+import System.Process (CmdSpec(..))
 
 autoUpdatable :: [PackageDescription]
 autoUpdatable =
@@ -180,7 +142,7 @@ autoUpdatable =
                     : Package.VersionPlaceholder
                     : [Package.StaticPlaceholder ".tar.gz"]
              in Package.Updater
-                { detectLatest = latestGitHub ghArguments $ Text.stripPrefix "v"
+                { detectLatest = latestGitHub ghArguments stableTagTransform
                 , getVersion = reuploadWithTemplate template []
                 , is64 = False
                 }
@@ -314,197 +276,6 @@ check = for_ autoUpdatable go
         >>= mapM_ checkUpdateAvailability
         >> liftIO (putStrLn "")
 
-getAndLogLatest :: PackageDescription -> SlackBuilderT (Maybe PackageUpdateData)
-getAndLogLatest description = do
-    let PackageDescription{ latest = Package.Updater{ detectLatest }, name } = description
-    liftIO (putStrLn $ Text.unpack name <> ": Retreiving the latest version.")
-    detectedVersion <- detectLatest
-    category <- fmap Text.pack
-        <$> findCategory (Text.unpack name)
-    pure $ PackageUpdateData description
-        <$> category
-        <*> detectedVersion
-
-checkUpdateAvailability :: PackageUpdateData -> SlackBuilderT (Maybe PackageInfo)
-checkUpdateAvailability PackageUpdateData{..} = do
-    let name' = Text.unpack $ getField @"name" description
-        packagePath = Text.unpack category </> name' </> (name' <.> "info")
-    repository' <- SlackBuilderT $ asks repository
-    infoContents <- liftIO $ ByteString.readFile $ repository' </> packagePath
-
-    case parse parseInfoFile packagePath infoContents of
-        Right parsedInfoFile
-            | version == getField @"version" parsedInfoFile ->
-                liftIO $ do
-                    setSGR [SetColor Foreground Dull Green]
-                    Text.IO.putStrLn
-                        $ getField @"name" description <> " is up to date (Version " <> version <> ")."
-                    setSGR [Reset]
-                    pure Nothing
-            | otherwise ->
-                liftIO $ do
-                    setSGR [SetColor Foreground Dull Yellow]
-                    Text.IO.putStr
-                        $ "A new version of "
-                        <> getField @"name" description
-                        <> " " <> getField @"version" parsedInfoFile
-                        <> " is available (" <> version <> ")."
-                    setSGR [Reset]
-                    putStrLn ""
-                    pure $ Just parsedInfoFile
-        Left errorBundle -> liftIO (putStr $ errorBundlePretty errorBundle)
-            >> pure Nothing
-
-updatePackageIfRequired :: PackageUpdateData -> SlackBuilderT ()
-updatePackageIfRequired updateData
-    = checkUpdateAvailability updateData
-    >>= mapM_ (updatePackage updateData)
-
-data DownloadUpdated = DownloadUpdated
-    { result :: Package.Download
-    , version :: Text
-    , is64 :: Bool
-    } deriving (Eq, Show)
-
-updateDownload :: Text -> Package.Updater -> SlackBuilderT DownloadUpdated
-updateDownload packagePath Package.Updater{..} = do
-    latestDownloadVersion <- fromJust <$> detectLatest
-    result <- getVersion packagePath latestDownloadVersion
-    pure $ DownloadUpdated
-        { result = result
-        , version = latestDownloadVersion
-        , is64 = is64
-        }
-
-cloneFromGit :: URI -> Text -> Text -> Text -> SlackBuilderT Package.Download
-cloneFromGit repo tagPrefix packagePath version = do
-    let downloadFileName = URI.unRText
-            $ NonEmpty.last $ snd $ fromJust $ URI.uriPath repo
-        relativeTarball = Text.unpack packagePath
-            </> (dropExtension (Text.unpack downloadFileName) <> "-" <> Text.unpack version)
-    (uri', checksum) <- cloneAndUpload (URI.render repo) relativeTarball tagPrefix
-    pure $ Package.Download
-        { md5sum = checksum
-        , download = uri'
-        }
-
-downloadWithTemplate :: Package.DownloadTemplate -> Text -> Text -> SlackBuilderT Package.Download
-downloadWithTemplate downloadTemplate packagePath version = do
-    repository' <- SlackBuilderT $ asks repository
-    uri' <- liftIO $ Package.renderDownloadWithVersion downloadTemplate version
-    checksum <- download uri' $ repository' </> Text.unpack packagePath
-    pure $ Package.Download uri' $ snd checksum
-
-reuploadWithTemplate :: Package.DownloadTemplate -> [CmdSpec] -> Text -> Text -> SlackBuilderT Package.Download
-reuploadWithTemplate downloadTemplate commands packagePath version = do
-    repository' <- SlackBuilderT $ asks repository
-    uri' <- liftIO $ Package.renderDownloadWithVersion downloadTemplate version
-    let downloadFileName = Text.unpack
-            $ URI.unRText
-            $ NonEmpty.last $ snd $ fromJust $ URI.uriPath uri'
-        packagePathRelativeToCurrent = repository' </> Text.unpack packagePath
-
-    (relativeTarball', checksum) <- case commands of
-        [] -> do
-            (downloadedFileName, checksum) <- download uri' packagePathRelativeToCurrent
-            pure (packagePathRelativeToCurrent </> downloadedFileName, checksum)
-        _ -> do
-            changedArchiveRootName <- extractRemote uri' packagePathRelativeToCurrent
-            let relativeTarball = packagePathRelativeToCurrent
-                    </> fromMaybe downloadFileName changedArchiveRootName
-            prepareSource relativeTarball
-
-    download' <- handleReupload relativeTarball' downloadFileName
-    pure $ Package.Download download' checksum
-  where
-    name' = Text.pack $ takeBaseName $ Text.unpack packagePath
-    prepareSource tarballPath =
-        liftIO (traverse (defaultCreateProcess tarballPath) commands)
-            >> liftIO (tarCompress tarballPath)
-            <* liftIO (removeDirectoryRecursive tarballPath)
-    tarCompress tarballPath =
-        let archiveBaseFilename = takeFileName tarballPath
-            appendTarExtension = (<.> "tar.xz")
-         in fmap (appendTarExtension tarballPath,)
-            $ withCurrentDirectory (takeDirectory tarballPath)
-            $ runConduitRes $ yield archiveBaseFilename
-            .| void tarFilePath
-            .| Lzma.compress Nothing
-            .| sinkFileAndHash (appendTarExtension archiveBaseFilename)
-    handleReupload relativeTarball downloadFileName = do
-        downloadURL' <- SlackBuilderT $ asks downloadURL
-
-        liftIO $ putStrLn $ "Upload the source tarball " <> relativeTarball
-        uploadCommand relativeTarball ("/" <> name')
-        liftIO $ mkURI $ downloadURL' <> "/" <> name' <> "/" <> Text.pack downloadFileName
-    defaultCreateProcess cwd' cmdSpec
-        = flip withCreateProcess (const . const . const waitForProcess)
-        $ CreateProcess
-            { use_process_jobs = False
-            , std_out = Inherit
-            , std_in = NoStream
-            , std_err = Inherit
-            , new_session = False
-            , env = Nothing
-            , detach_console = False
-            , delegate_ctlc = False
-            , cwd = Just cwd'
-            , create_new_console = False
-            , create_group = False
-            , cmdspec = cmdSpec
-            , close_fds = True
-            , child_user = Nothing
-            , child_group = Nothing
-            }
-
-updatePackage :: PackageUpdateData -> PackageInfo -> SlackBuilderT ()
-updatePackage PackageUpdateData{..} info = do
-    let packagePath = category <> "/" <> getField @"name" description
-        latest' = getField @"latest" description
-
-    repository' <- SlackBuilderT $ asks repository
-    mainDownload <- (, getField @"is64" latest')
-        <$> getField @"getVersion" latest' packagePath version
-    moreDownloads <- traverse (updateDownload packagePath)
-        $ getField @"downloaders" description
-    let (downloads64, allDownloads) = partition snd
-            $ mainDownload
-            : (liftA2 (,) (getField @"result") (getField @"is64") <$> toList moreDownloads)
-    let infoFilePath = repository' </> Text.unpack packagePath
-            </> (Text.unpack (getField @"name" description) <.> "info")
-        package' = info
-            { version = version
-            , downloads = getField @"download" . fst <$> allDownloads
-            , checksums = getField @"md5sum" . fst <$> allDownloads
-            , downloadX64 = getField @"download" . fst <$> downloads64
-            , checksumX64 = getField @"md5sum" . fst <$> downloads64
-            }
-    liftIO $ Text.IO.writeFile infoFilePath $ generate package'
-    updateSlackBuildVersion packagePath version
-        $ getField @"version" <$> moreDownloads
-
-    commit packagePath version
-
-findCategory :: FilePath -> SlackBuilderT (Maybe FilePath)
-findCategory packageName = do
-    repository' <- SlackBuilderT $ asks repository
-    go repository' [] "" <&> fmap fst . find ((packageName ==) . snd)
-  where
-    go currentDirectory found accumulatedDirectory = do
-        let fullDirectory = currentDirectory </> accumulatedDirectory
-        contents <- liftIO $ listDirectory fullDirectory
-        case find (isSuffixOf ".info") contents of
-            Just _ ->
-                let result = first dropTrailingPathSeparator
-                        $ splitFileName accumulatedDirectory
-                 in pure $ result : found
-            Nothing ->
-                let accumulatedDirectories = (accumulatedDirectory </>)
-                        <$> filter (not . isPrefixOf ".") contents
-                    directoryFilter = liftIO . doesDirectoryExist
-                        . (currentDirectory </>)
-                 in filterM directoryFilter accumulatedDirectories
-                    >>= traverse (go currentDirectory found) <&> concat
 
 main :: IO ()
 main = do
diff --git a/src/SlackBuilder/LatestVersionCheck.hs b/src/SlackBuilder/LatestVersionCheck.hs
deleted file mode 100644
index 233ea3c..0000000
--- a/src/SlackBuilder/LatestVersionCheck.hs
+++ /dev/null
@@ -1,192 +0,0 @@
-{- This Source Code Form is subject to the terms of the Mozilla Public License,
-   v. 2.0. If a copy of the MPL was not distributed with this file, You can
-   obtain one at https://mozilla.org/MPL/2.0/. -}
-
--- | This module contains implementations to check the latest version of a
--- package hosted by a specific service.
-module SlackBuilder.LatestVersionCheck
-    ( PackageOwner(..)
-    , TextArguments(..)
-    , latestGitHub
-    , latestPackagist
-    , latestText
-    , stableTagTransform
-    ) where
-
-import SlackBuilder.Config
-import qualified Data.Aeson as Aeson
-import Data.Aeson ((.:))
-import Data.Aeson.TH (defaultOptions, deriveJSON)
-import Data.HashMap.Strict (HashMap)
-import qualified Data.HashMap.Strict as HashMap
-import Data.Text (Text)
-import qualified Data.Text as Text
-import qualified Data.Text.Encoding as Text.Encoding
-import Data.Vector (Vector, (!?))
-import qualified Data.Vector as Vector
-import Network.HTTP.Req
-    ( header
-    , runReq
-    , defaultHttpConfig
-    , req
-    , GET(..)
-    , https
-    , jsonResponse
-    , NoReqBody(..)
-    , (/:)
-    , responseBody
-    , useHttpsURI
-    , bsResponse
-    , POST(..)
-    , ReqBodyJson(..)
-    )
-import Text.URI (mkURI)
-import SlackBuilder.Trans
-import qualified Data.Aeson.KeyMap as KeyMap
-import GHC.Records (HasField(..))
-import Control.Monad.Trans.Reader (asks)
-import Control.Monad.IO.Class (MonadIO(..))
-import Control.Monad ((>=>))
-
-data PackageOwner = PackageOwner
-    { owner :: Text
-    , name :: Text
-    } deriving (Eq, Show)
-
--- | Removes the leading "v" from the version string and returns the result if
--- it looks like a version.
-stableTagTransform :: Text -> Maybe Text
-stableTagTransform = Text.stripPrefix "v" >=> checkForStable
-  where
-    checkForStable tag
-        | '-' `Text.elem` tag = Nothing
-        | otherwise = Just tag
-
--- * Packagist
-
-newtype PackagistPackage = PackagistPackage
-    { version :: Text
-    } deriving (Eq, Show)
-
-$(deriveJSON defaultOptions ''PackagistPackage)
-
-newtype PackagistResponse = PackagistResponse
-    { packages :: HashMap Text (Vector PackagistPackage)
-    } deriving (Eq, Show)
-
-$(deriveJSON defaultOptions ''PackagistResponse)
-
-latestPackagist :: PackageOwner -> SlackBuilderT (Maybe Text)
-latestPackagist PackageOwner{..} = do
-    packagistResponse <- runReq defaultHttpConfig $
-        let uri = https "repo.packagist.org" /: "p2"
-                /: owner
-                /: name <> ".json"
-         in req GET uri NoReqBody jsonResponse mempty
-    let packagistPackages = packages $ responseBody packagistResponse
-        fullName = Text.intercalate "/" [owner, name]
-
-    pure $ HashMap.lookup fullName packagistPackages
-        >>= fmap (version . fst) . Vector.uncons
-
--- * Remote text file
-
-data TextArguments = TextArguments
-    { versionPicker :: Text -> Text
-    , textURL :: Text
-    }
-
-latestText :: TextArguments -> SlackBuilderT (Maybe Text)
-latestText TextArguments{..} = do
-    uri <- liftIO $ useHttpsURI <$> mkURI textURL
-    packagistResponse <- traverse (runReq defaultHttpConfig . go . fst) uri
-
-    pure $ versionPicker . Text.Encoding.decodeUtf8 . responseBody
-        <$> packagistResponse
-  where
-    go uri = req GET uri NoReqBody bsResponse mempty
-
--- * GitHub
-
-newtype GhRefNode = GhRefNode
-    { name :: Text
-    } deriving (Eq, Show)
-
-$(deriveJSON defaultOptions ''GhRefNode)
-
-newtype GhRef = GhRef
-    { nodes :: Vector GhRefNode
-    } deriving (Eq, Show)
-
-$(deriveJSON defaultOptions ''GhRef)
-
-newtype GhRepository = GhRepository
-    { refs :: GhRef
-    } deriving (Eq, Show)
-
-$(deriveJSON defaultOptions ''GhRepository)
-
-newtype GhData = GhData
-    { repository :: GhRepository
-    } deriving (Eq, Show)
-
-instance Aeson.FromJSON GhData where
-    parseJSON (Aeson.Object keyMap)
-        | Just data' <- KeyMap.lookup "data" keyMap =
-            GhData <$> Aeson.withObject "GhData" (.: "repository") data'
-    parseJSON _ = fail "data key not found in the response"
-
-data GhVariables = GhVariables
-    { name :: Text
-    , owner :: Text
-    } deriving (Eq, Show)
-
-$(deriveJSON defaultOptions ''GhVariables)
-
-data GhQuery = GhQuery
-    { query :: Text
-    , variables :: GhVariables
-    } deriving (Eq, Show)
-
-$(deriveJSON defaultOptions ''GhQuery)
-
-latestGitHub
-    :: PackageOwner
-    -> (Text -> Maybe Text)
-    -> SlackBuilderT (Maybe Text)
-latestGitHub PackageOwner{..} versionTransform = do
-    ghToken' <- SlackBuilderT $ asks ghToken
-    ghResponse <- runReq defaultHttpConfig $
-        let uri = https "api.github.com" /: "graphql"
-            query = GhQuery
-                {  query = githubQuery
-                , variables = GhVariables
-                    { owner = owner
-                    , name = name
-                    }
-                }
-            authorizationHeader = header "authorization"
-                $ Text.Encoding.encodeUtf8
-                $ "Bearer " <> ghToken'
-         in req POST uri (ReqBodyJson query) jsonResponse
-            $ authorizationHeader <> header "User-Agent" "SlackBuilder"
-    let ghNodes = nodes
-            $ refs
-            $ (getField @"repository" :: GhData -> GhRepository)
-            $ responseBody ghResponse
-        refs' = Vector.reverse
-            $ Vector.catMaybes
-            $ versionTransform . getField @"name" <$> ghNodes
-    pure $ refs' !? 0
-  where
-    githubQuery =
-        "query ($name: String!, $owner: String!) {\n\
-        \  repository(name: $name, owner: $owner) {\n\
-        \    refs(last: 10, refPrefix: \"refs/tags/\", orderBy: { field: TAG_COMMIT_DATE, direction: ASC }) {\n\
-        \      nodes {\n\
-        \        id,\n\
-        \        name\n\
-        \      }\n\
-        \    }\n\
-        \  }\n\
-        \}"
diff --git a/src/SlackBuilder/Update.hs b/src/SlackBuilder/Update.hs
new file mode 100644
index 0000000..008b63d
--- /dev/null
+++ b/src/SlackBuilder/Update.hs
@@ -0,0 +1,262 @@
+{- This Source Code Form is subject to the terms of the Mozilla Public License,
+   v. 2.0. If a copy of the MPL was not distributed with this file, You can
+   obtain one at https://mozilla.org/MPL/2.0/. -}
+
+module SlackBuilder.Update
+    ( checkUpdateAvailability
+    , cloneFromGit
+    , downloadWithTemplate
+    , getAndLogLatest
+    , reuploadWithTemplate
+    , updatePackageIfRequired
+    ) where
+
+import Control.Applicative (Applicative(..))
+import Control.Monad.IO.Class (MonadIO(..))
+import Control.Monad.Trans.Reader (asks)
+import qualified Data.ByteString as ByteString
+import Data.Foldable (Foldable(..), find)
+import qualified Data.List.NonEmpty as NonEmpty
+import Data.Maybe (fromJust, fromMaybe)
+import Data.Text (Text)
+import qualified Data.Text as Text
+import qualified Data.Text.IO as Text.IO
+import GHC.Records (HasField(..))
+import System.FilePath
+    ( (</>)
+    , (<.>)
+    , dropExtension
+    , takeBaseName
+    , splitFileName
+    , takeDirectory
+    , takeFileName
+    , dropTrailingPathSeparator
+    )
+import System.Process
+    ( CmdSpec(..)
+    , CreateProcess(..)
+    , StdStream(..)
+    , withCreateProcess
+    , waitForProcess
+    )
+import SlackBuilder.Config
+import SlackBuilder.Download
+import SlackBuilder.Info
+import SlackBuilder.Package (PackageDescription(..), PackageUpdateData(..))
+import qualified SlackBuilder.Package as Package
+import SlackBuilder.Trans
+import Text.Megaparsec (parse, errorBundlePretty)
+import Text.URI (URI(..), mkURI)
+import qualified Text.URI as URI
+import System.Directory
+    ( listDirectory
+    , doesDirectoryExist
+    , withCurrentDirectory
+    , removeDirectoryRecursive
+    )
+import System.Console.ANSI
+    ( setSGR
+    , SGR(..)
+    , ColorIntensity(..)
+    , Color(..)
+    , ConsoleLayer(..)
+    )
+import Control.Monad (filterM, void)
+import Data.List (isPrefixOf, isSuffixOf, partition)
+import Conduit (runConduitRes, (.|), yield)
+import Data.Functor ((<&>))
+import Data.Bifunctor (Bifunctor(..))
+import Data.Conduit.Tar (tarFilePath)
+import qualified Data.Conduit.Lzma as Lzma
+
+getAndLogLatest :: PackageDescription -> SlackBuilderT (Maybe PackageUpdateData)
+getAndLogLatest description = do
+    let PackageDescription{ latest = Package.Updater{ detectLatest }, name } = description
+    liftIO (putStrLn $ Text.unpack name <> ": Retreiving the latest version.")
+    detectedVersion <- detectLatest
+    category <- fmap Text.pack
+        <$> findCategory (Text.unpack name)
+    pure $ PackageUpdateData description
+        <$> category
+        <*> detectedVersion
+
+checkUpdateAvailability :: PackageUpdateData -> SlackBuilderT (Maybe PackageInfo)
+checkUpdateAvailability PackageUpdateData{..} = do
+    let name' = Text.unpack $ getField @"name" description
+        packagePath = Text.unpack category </> name' </> (name' <.> "info")
+    repository' <- SlackBuilderT $ asks repository
+    infoContents <- liftIO $ ByteString.readFile $ repository' </> packagePath
+
+    case parse parseInfoFile packagePath infoContents of
+        Right parsedInfoFile
+            | version == getField @"version" parsedInfoFile ->
+                liftIO $ do
+                    setSGR [SetColor Foreground Dull Green]
+                    Text.IO.putStrLn
+                        $ getField @"name" description <> " is up to date (Version " <> version <> ")."
+                    setSGR [Reset]
+                    pure Nothing
+            | otherwise ->
+                liftIO $ do
+                    setSGR [SetColor Foreground Dull Yellow]
+                    Text.IO.putStr
+                        $ "A new version of "
+                        <> getField @"name" description
+                        <> " " <> getField @"version" parsedInfoFile
+                        <> " is available (" <> version <> ")."
+                    setSGR [Reset]
+                    putStrLn ""
+                    pure $ Just parsedInfoFile
+        Left errorBundle -> liftIO (putStr $ errorBundlePretty errorBundle)
+            >> pure Nothing
+
+updatePackageIfRequired :: PackageUpdateData -> SlackBuilderT ()
+updatePackageIfRequired updateData
+    = checkUpdateAvailability updateData
+    >>= mapM_ (updatePackage updateData)
+
+data DownloadUpdated = DownloadUpdated
+    { result :: Package.Download
+    , version :: Text
+    , is64 :: Bool
+    } deriving (Eq, Show)
+
+updateDownload :: Text -> Package.Updater -> SlackBuilderT DownloadUpdated
+updateDownload packagePath Package.Updater{..} = do
+    latestDownloadVersion <- fromJust <$> detectLatest
+    result <- getVersion packagePath latestDownloadVersion
+    pure $ DownloadUpdated
+        { result = result
+        , version = latestDownloadVersion
+        , is64 = is64
+        }
+
+cloneFromGit :: URI -> Text -> Text -> Text -> SlackBuilderT Package.Download
+cloneFromGit repo tagPrefix packagePath version = do
+    let downloadFileName = URI.unRText
+            $ NonEmpty.last $ snd $ fromJust $ URI.uriPath repo
+        relativeTarball = Text.unpack packagePath
+            </> (dropExtension (Text.unpack downloadFileName) <> "-" <> Text.unpack version)
+    (uri', checksum) <- cloneAndUpload (URI.render repo) relativeTarball tagPrefix
+    pure $ Package.Download
+        { md5sum = checksum
+        , download = uri'
+        }
+
+downloadWithTemplate :: Package.DownloadTemplate -> Text -> Text -> SlackBuilderT Package.Download
+downloadWithTemplate downloadTemplate packagePath version = do
+    repository' <- SlackBuilderT $ asks repository
+    uri' <- liftIO $ Package.renderDownloadWithVersion downloadTemplate version
+    checksum <- download uri' $ repository' </> Text.unpack packagePath
+    pure $ Package.Download uri' $ snd checksum
+
+reuploadWithTemplate :: Package.DownloadTemplate -> [CmdSpec] -> Text -> Text -> SlackBuilderT Package.Download
+reuploadWithTemplate downloadTemplate commands packagePath version = do
+    repository' <- SlackBuilderT $ asks repository
+    uri' <- liftIO $ Package.renderDownloadWithVersion downloadTemplate version
+    let downloadFileName = Text.unpack
+            $ URI.unRText
+            $ NonEmpty.last $ snd $ fromJust $ URI.uriPath uri'
+        packagePathRelativeToCurrent = repository' </> Text.unpack packagePath
+
+    (relativeTarball', checksum) <- case commands of
+        [] -> do
+            (downloadedFileName, checksum) <- download uri' packagePathRelativeToCurrent
+            pure (packagePathRelativeToCurrent </> downloadedFileName, checksum)
+        _ -> do
+            changedArchiveRootName <- extractRemote uri' packagePathRelativeToCurrent
+            let relativeTarball = packagePathRelativeToCurrent
+                    </> fromMaybe downloadFileName changedArchiveRootName
+            prepareSource relativeTarball
+
+    download' <- handleReupload relativeTarball' downloadFileName
+    pure $ Package.Download download' checksum
+  where
+    name' = Text.pack $ takeBaseName $ Text.unpack packagePath
+    prepareSource tarballPath =
+        liftIO (traverse (defaultCreateProcess tarballPath) commands)
+            >> liftIO (tarCompress tarballPath)
+            <* liftIO (removeDirectoryRecursive tarballPath)
+    tarCompress tarballPath =
+        let archiveBaseFilename = takeFileName tarballPath
+            appendTarExtension = (<.> "tar.xz")
+         in fmap (appendTarExtension tarballPath,)
+            $ withCurrentDirectory (takeDirectory tarballPath)
+            $ runConduitRes $ yield archiveBaseFilename
+            .| void tarFilePath
+            .| Lzma.compress Nothing
+            .| sinkFileAndHash (appendTarExtension archiveBaseFilename)
+    handleReupload relativeTarball downloadFileName = do
+        downloadURL' <- SlackBuilderT $ asks downloadURL
+
+        liftIO $ putStrLn $ "Upload the source tarball " <> relativeTarball
+        uploadCommand relativeTarball ("/" <> name')
+        liftIO $ mkURI $ downloadURL' <> "/" <> name' <> "/" <> Text.pack downloadFileName
+    defaultCreateProcess cwd' cmdSpec
+        = flip withCreateProcess (const . const . const waitForProcess)
+        $ CreateProcess
+            { use_process_jobs = False
+            , std_out = Inherit
+            , std_in = NoStream
+            , std_err = Inherit
+            , new_session = False
+            , env = Nothing
+            , detach_console = False
+            , delegate_ctlc = False
+            , cwd = Just cwd'
+            , create_new_console = False
+            , create_group = False
+            , cmdspec = cmdSpec
+            , close_fds = True
+            , child_user = Nothing
+            , child_group = Nothing
+            }
+
+updatePackage :: PackageUpdateData -> PackageInfo -> SlackBuilderT ()
+updatePackage PackageUpdateData{..} info = do
+    let packagePath = category <> "/" <> getField @"name" description
+        latest' = getField @"latest" description
+
+    repository' <- SlackBuilderT $ asks repository
+    mainDownload <- (, getField @"is64" latest')
+        <$> getField @"getVersion" latest' packagePath version
+    moreDownloads <- traverse (updateDownload packagePath)
+        $ getField @"downloaders" description
+    let (downloads64, allDownloads) = partition snd
+            $ mainDownload
+            : (liftA2 (,) (getField @"result") (getField @"is64") <$> toList moreDownloads)
+    let infoFilePath = repository' </> Text.unpack packagePath
+            </> (Text.unpack (getField @"name" description) <.> "info")
+        package' = info
+            { version = version
+            , downloads = getField @"download" . fst <$> allDownloads
+            , checksums = getField @"md5sum" . fst <$> allDownloads
+            , downloadX64 = getField @"download" . fst <$> downloads64
+            , checksumX64 = getField @"md5sum" . fst <$> downloads64
+            }
+    liftIO $ Text.IO.writeFile infoFilePath $ generate package'
+    updateSlackBuildVersion packagePath version
+        $ getField @"version" <$> moreDownloads
+
+    commit packagePath version
+
+findCategory :: FilePath -> SlackBuilderT (Maybe FilePath)
+findCategory packageName = do
+    repository' <- SlackBuilderT $ asks repository
+    go repository' [] "" <&> fmap fst . find ((packageName ==) . snd)
+  where
+    go currentDirectory found accumulatedDirectory = do
+        let fullDirectory = currentDirectory </> accumulatedDirectory
+        contents <- liftIO $ listDirectory fullDirectory
+        case find (isSuffixOf ".info") contents of
+            Just _ ->
+                let result = first dropTrailingPathSeparator
+                        $ splitFileName accumulatedDirectory
+                 in pure $ result : found
+            Nothing ->
+                let accumulatedDirectories = (accumulatedDirectory </>)
+                        <$> filter (not . isPrefixOf ".") contents
+                    directoryFilter = liftIO . doesDirectoryExist
+                        . (currentDirectory </>)
+                 in filterM directoryFilter accumulatedDirectories
+                    >>= traverse (go currentDirectory found) <&> concat