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https://github.com/github/semantic.git
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76 lines
2.4 KiB
Haskell
76 lines
2.4 KiB
Haskell
{-# LANGUAGE TypeApplications #-}
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module Main (main) where
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import AST.Unmarshal
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import qualified Language.Python.AST as AST
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import qualified Language.Python.Grammar as Python
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import Source.Range
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import Source.Span
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import Data.Aeson (toJSON)
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import Data.ByteString.Char8
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import Data.ByteString (readFile)
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import Options.Applicative hiding (style)
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import Text.Pretty.Simple (pPrint, pPrintNoColor)
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import Data.Foldable (traverse_)
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import Control.Monad ((>=>))
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import Marshal.JSON (marshal)
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import Data.ByteString.Lazy.Char8 (putStrLn)
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import Data.Aeson.Encode.Pretty (encodePretty)
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data SemanticAST = SemanticAST
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{ _format :: Format
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, _noColor :: Bool
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, _source :: Either [FilePath] String
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}
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-- Usage: semantic-ast --format ARG [--no-color] (--sourceString STRING | FILEPATHS…)
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parseAST :: Parser SemanticAST
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parseAST = SemanticAST
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<$> option auto
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( long "format"
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<> help "Specify desired output: show, json, sexpression" )
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<*> switch
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( long "no-color"
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<> help "Print with color: --color"
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)
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<*> (Left <$> some
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(Options.Applicative.argument str (metavar "FILEPATH(S)"))
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<|> Right <$> strOption
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( long "sourceString"
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<> metavar "STRING"
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<> help "Specify source input to parse"
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))
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main :: IO ()
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main = generateAST =<< execParser opts
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generateAST :: SemanticAST -> IO ()
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generateAST (SemanticAST format noColor source) =
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getByteStrings >>= traverse_ go
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where getByteStrings = case source of
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Left filePaths -> traverse Data.ByteString.readFile filePaths
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Right source -> pure [Data.ByteString.Char8.pack source]
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go = ast >=> display
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ast = parseByteString @AST.Module @(Range, Span) Python.tree_sitter_python -- TODO: generalize for all languages
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display = case format of
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Json -> Data.ByteString.Lazy.Char8.putStrLn . encodePretty . either toJSON (marshal . fmap (const ())) -- TODO: replacing range and span annotations with () for which there is a ToJSON instance for now, deal with this later
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Show -> print
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Pretty | noColor -> pPrintNoColor
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| otherwise -> pPrint
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opts :: ParserInfo SemanticAST
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opts = info (parseAST <**> helper)
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( fullDesc
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<> progDesc "Parse source code and produce an AST"
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<> header "semantic-ast is a package used to parse source code" )
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-- TODO: Define formats for json, sexpression, etc.
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data Format = Show
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| Pretty
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| Json
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deriving (Read)
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