49 lines
1.5 KiB
Haskell
49 lines
1.5 KiB
Haskell
module Handler.Download
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( getDownloadR
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, getDownloadSnapshotsJsonR
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, getDownloadLtsSnapshotsJsonR
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, getGhcMajorVersionR
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, getDownloadGhcLinksR
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) where
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import Import
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import Data.GhcLinks
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import Yesod.GitRepo (grContent)
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import Stackage.Database
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import qualified Data.Text as T
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getDownloadR :: Handler Html
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getDownloadR = redirectWith status301 InstallR
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getDownloadSnapshotsJsonR :: Handler Value
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getDownloadSnapshotsJsonR = getDownloadLtsSnapshotsJsonR
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getDownloadLtsSnapshotsJsonR :: Handler Value
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getDownloadLtsSnapshotsJsonR = snapshotsJSON
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-- Print the ghc major version for the given snapshot.
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ghcMajorVersionText :: Snapshot -> Text
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ghcMajorVersionText =
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getMajorVersion . snapshotGhc
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where
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getMajorVersion :: Text -> Text
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getMajorVersion = intercalate "." . take 2 . T.splitOn "."
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getGhcMajorVersionR :: SnapName -> Handler Text
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getGhcMajorVersionR name = do
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snapshot <- lookupSnapshot name >>= maybe notFound return
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return $ ghcMajorVersionText $ entityVal snapshot
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getDownloadGhcLinksR :: SupportedArch -> Text -> Handler TypedContent
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getDownloadGhcLinksR arch fileName = do
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ver <- maybe notFound return
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$ stripPrefix "ghc-"
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>=> stripSuffix "-links.yaml"
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>=> ghcMajorVersionFromText
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$ fileName
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ghcLinks <- getYesod >>= fmap wcGhcLinks . liftIO . grContent . websiteContent
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case lookup (arch, ver) (ghcLinksMap ghcLinks) of
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Just text -> return $ TypedContent yamlMimeType $ toContent text
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Nothing -> notFound
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where
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yamlMimeType = "text/yaml"
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