mirror of
https://github.com/github/semantic.git
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90 lines
3.5 KiB
Haskell
90 lines
3.5 KiB
Haskell
module Main where
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import Categorizable
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import Diff
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import Interpreter
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import qualified Parsers as P
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import Syntax
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import Range
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import qualified PatchOutput
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import Split
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import Term
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import Unified
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import Source
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import Control.Comonad.Cofree
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import qualified Data.ByteString.Char8 as B1
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import Options.Applicative
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import System.Directory
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import System.FilePath
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import qualified Data.Text as T
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import qualified Data.Text.Lazy.IO as TextIO
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import qualified System.IO as IO
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import qualified Data.Text.ICU.Detect as Detect
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import qualified Data.Text.ICU.Convert as Convert
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import Data.Biapplicative
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import Data.Bifunctor.Join
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data Renderer = Unified | Split | Patch
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data Arguments = Arguments { renderer :: Renderer, output :: Maybe FilePath, sourceA :: FilePath, sourceB :: FilePath }
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arguments :: Parser Arguments
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arguments = Arguments
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<$> (flag Split Unified (long "unified" <> help "output a unified diff")
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<|> flag Split Patch (long "patch" <> help "output a patch(1)-compatible diff")
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<|> flag' Split (long "split" <> help "output a split diff"))
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<*> (optional $ strOption (long "output" <> short 'o' <> help "output directory for split diffs, defaulting to stdout if unspecified"))
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<*> strArgument (metavar "FILE a")
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<*> strArgument (metavar "FILE b")
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main :: IO ()
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main = do
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arguments <- execParser opts
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let (sourceAPath, sourceBPath) = (sourceA arguments, sourceB arguments)
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sources <- sequence $ readAndTranscodeFile <$> Join (sourceAPath, sourceBPath)
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let parse = (P.parserForType . T.pack . takeExtension) sourceAPath
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terms <- sequence $ parse <$> sources
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let replaceLeaves = replaceLeavesWithWordBranches <$> sources
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printDiff arguments (runJoin sources) (runJoin $ replaceLeaves <*> terms)
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where opts = info (helper <*> arguments)
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(fullDesc <> progDesc "Diff some things" <> header "semantic-diff - diff semantically")
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printDiff :: Arguments -> (Source Char, Source Char) -> (Term T.Text Info, Term T.Text Info) -> IO ()
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printDiff arguments (aSource, bSource) (aTerm, bTerm) = case renderer arguments of
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Unified -> do
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rendered <- unified diff aSource bSource
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B1.putStr rendered
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Split -> do
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rendered <- split diff aSource bSource
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case output arguments of
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Just path -> do
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isDir <- doesDirectoryExist path
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let outputPath = if isDir
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then path </> (takeFileName (sourceB arguments) -<.> ".html")
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else path
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IO.withFile outputPath IO.WriteMode (write rendered)
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Nothing -> TextIO.putStr rendered
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Patch -> do
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putStr $ PatchOutput.patch diff aSource bSource
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where diff = interpret comparable aTerm bTerm
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write rendered h = TextIO.hPutStr h rendered
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replaceLeavesWithWordBranches :: Source Char -> Term T.Text Info -> Term T.Text Info
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replaceLeavesWithWordBranches source = replaceIn
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where
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replaceIn (info :< syntax) = info :< case syntax of
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Leaf _ | (Info range categories) <- info ->
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let ranges = rangesAndWordsFrom (start range) (toList $ slice range source) in
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if length ranges > 1 then Indexed $ makeLeaf categories <$> ranges else syntax
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Indexed i -> Indexed $ replaceIn <$> i
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Fixed f -> Fixed $ replaceIn <$> f
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Keyed k -> Keyed $ replaceIn <$> k
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makeLeaf categories (range, substring) = Info range categories :< Leaf (T.pack substring)
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readAndTranscodeFile :: FilePath -> IO (Source Char)
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readAndTranscodeFile path = fromText <$> do
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text <- B1.readFile path
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match <- Detect.detectCharset text
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converter <- Convert.open match Nothing
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return $ Convert.toUnicode converter text
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