784be819b3short hashes can be lengthened by unrelated pulls into a repo, breaking reproducible builds https://lists.reproducible-builds.org/pipermail/rb-general/2023-September/003072.html
74 lines
1.8 KiB
Haskell
74 lines
1.8 KiB
Haskell
{- Package version determination. -}
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{-# LANGUAGE LambdaCase #-}
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{-# OPTIONS_GHC -fno-warn-tabs #-}
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module Build.Version where
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import Data.List
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import System.Environment
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import Data.Char
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import System.Process
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import Control.Applicative
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import Prelude
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import Utility.Monad
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import Utility.Exception
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import Utility.Misc
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type Version = String
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{- Set when making an official release. (Distribution vendors should set
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- this too.) -}
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isReleaseBuild :: IO Bool
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isReleaseBuild = (== Just "1") <$> catchMaybeIO (getEnv "RELEASE_BUILD")
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{- Version comes from the CHANGELOG, plus the git rev of the last commit.
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- This works for autobuilds, ad-hoc builds, etc.
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-
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- If git or a git repo is not available, or something goes wrong,
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- or this is a release build, just use the version from the CHANGELOG. -}
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getVersion :: IO Version
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getVersion = do
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changelogversion <- getChangelogVersion
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ifM (isReleaseBuild)
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( return changelogversion
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, catchDefaultIO changelogversion $ do
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gitversion <- takeWhile (\c -> isAlphaNum c) <$> readProcess "sh"
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[ "-c"
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, "git log -n 1 --format=format:'%H'"
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] ""
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return $ if null gitversion
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then changelogversion
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else concat
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[ changelogversion
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, "-g"
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, gitversion
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]
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)
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getChangelogVersion :: IO Version
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getChangelogVersion = do
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changelog <- readFile "CHANGELOG"
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let verline = takeWhile (/= '\n') changelog
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return $ middle (words verline !! 1)
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where
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middle = drop 1 . init
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writeVersion :: Version -> IO ()
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writeVersion ver = catchMaybeIO (readFileStrict f) >>= \case
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Just s | s == body -> return ()
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_ -> writeFile f body
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where
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body = unlines $ concat
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[ header
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, ["packageversion :: String"]
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, ["packageversion = \"" ++ ver ++ "\""]
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, footer
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]
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header = [
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"{- Automatically generated. -}"
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, ""
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]
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footer = []
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f = "Build/Version"
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