29 lines
1.1 KiB
Haskell
29 lines
1.1 KiB
Haskell
module Handler.BuildVersion where
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import Import hiding (lift)
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import Language.Haskell.TH.Syntax
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import System.Process (rawSystem)
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import System.Exit
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getBuildVersionR :: Handler Text
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getBuildVersionR = return $ pack $(do
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let headFile = ".git/HEAD"
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qAddDependentFile headFile
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ehead <- qRunIO $ tryIO $ readFile $ headFile
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case decodeUtf8 <$> ehead of
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Left e -> lift $ ".git/HEAD not read: " ++ show e
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Right raw ->
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case takeWhile (/= '\n') <$> stripPrefix "ref: " raw of
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Nothing -> lift $ ".git/HEAD not in expected format: " ++ show raw
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Just fp' -> do
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let fp = ".git" </> unpack (fp' :: Text)
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qAddDependentFile fp
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bs <- qRunIO $ readFile fp
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isDirty <- qRunIO
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$ (/= ExitSuccess)
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<$> rawSystem "git" ["diff-files", "--quiet"]
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lift $ unpack $ unlines
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[ "Most recent commit: " ++ asText (decodeUtf8 bs)
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, "Working tree is " ++ (if isDirty then "dirty" else "clean")
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]
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)
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