22 lines
779 B
Haskell
Executable File
22 lines
779 B
Haskell
Executable File
#!/usr/bin/env runhaskell
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{-
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Display the current darcs repository's last tag and the number of days since.
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Similar to:
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$ darcs changes --to-tag . --from-tag .|head -n 1 |cut -d' ' -f-7 |xargs -I {} date -d "{}" +%s |xargs -I {} expr \( $(date +%s) - {} \) / 60 / 60 / 24
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-}
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import Data.Time
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import System.Environment
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import System.Locale
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import System.Process
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main = do
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tag:_ <- getArgs
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s <- readProcess "darcs" ["changes","--from-tag",tag,"--to-tag",tag] ""
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let datestr = unwords $ take 6 $ words $ head $ lines s
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date = readTime defaultTimeLocale "%a %b %e %H:%M:%S %Z %Y" datestr :: Day
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today <- getCurrentDay
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putStrLn $ show (diffDays today date) ++ " days since tag "++tag++":\n"
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putStr s
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getCurrentDay = localDay . zonedTimeToLocalTime <$> getZonedTime
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