Félix Baylac-Jacqué
3cd9149b29
We add a Haskell script in charge of reproducing the build. We currently handle quite poorly the progress update: stderr isn't streamed to the console. Knowing that a GHC build takes ~30 minutes, it'll be good to at least show some kind of progress to the user while building.
69 lines
2 KiB
Haskell
Executable file
69 lines
2 KiB
Haskell
Executable file
#!/usr/bin/env nix-shell
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#!nix-shell -i runhaskell -p "haskellPackages.ghcWithPackages(p: with p; [ optparse-applicative text process ])" -p nix -p diffoscope
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import Options.Applicative
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import Data.Text hiding (filter)
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import System.Exit
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import System.Process
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data Config = Config
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{ pkgName :: Text,
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ghcPath :: Text }
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type ReproPaths = [Text]
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type StorePath = Text
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main :: IO ()
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main = do
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c <- execParser opts
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mdp <- repro c
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print mdp
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pure ()
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where
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opts = info (configParser <**> helper)
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( fullDesc
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<> header "ReproTest.hs - Test the GHC binary reproducibility for a hackage package"
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)
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repro :: Config -> IO (Maybe ReproPaths)
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repro c = do
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-- 1. Nix instantiate derivation
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(eci, drvPathDirty, err) <- readProcessWithExitCode "nix-instantiate"
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[
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"--arg", "hs-pkg-name", "\"" ++ unpack (pkgName c) ++ "\"",
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"--arg", "ghcSrc", unpack $ ghcPath c,
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"./repro.nix"
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] ""
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let drvPath = filter (/= '\n') drvPathDirty
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print err
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print drvPath
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print eci
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-- 2. nix-store --realize /nix/store/xxx.drv
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(ecr1, p1, err1) <- readProcessWithExitCode "nix-store"
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[ "--realise", "--quiet", filter (/= '\n') drvPath ] ""
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print ecr1
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print p1
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print err1
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-- 3. nix-store --realize --check /nix/store/xxx.drv
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(ecr2, p2, err2) <- readProcessWithExitCode "nix-store"
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[ "--realise", "--quiet", "-K", "--check", drvPath ] ""
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print ecr2
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print p2
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print ecr2
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-- 4. If exit code > 1 => Just two repro paths
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if ecr2 == ExitSuccess
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then pure Nothing
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else pure $ Just [ pack p1, pack p2 ]
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runDiffoscope :: ReproPaths -> IO StorePath
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runDiffoscope = undefined
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-- Take the two different paths.
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-- Run diffoscope on them.
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configParser :: Parser Config
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configParser = Config
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<$> strOption (long "package-name" <> short 'p' <> help "Hackage package to test")
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<*> (strOption (long "ghc-path" <> short 'g' <> help "Path to the local GHC checkpoint")
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<|> strOption (long "ghc-nixexpr-path" <> short 'e' <> help "Path to the nix expression generating the GHC binary"))
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