1
1
mirror of https://github.com/github/semantic.git synced 2024-12-25 07:55:12 +03:00
semantic/app/Main.hs
2015-12-01 15:04:23 -05:00

139 lines
6.0 KiB
Haskell

module Main where
import Categorizable
import Diff
import Interpreter
import Patch
import Syntax
import Split
import Term
import Unified
import Control.Comonad.Cofree
import Control.Monad
import Control.Monad.Free hiding (unfoldM)
import qualified Data.Map as Map
import qualified Data.ByteString.Char8 as ByteString
import Data.Maybe
import Data.Set hiding (split)
import Options.Applicative
import System.Environment
import Foreign
import Foreign.C
import Foreign.C.Types
import Foreign.C.String
import Foreign.ForeignPtr.Unsafe
data TSLanguage = TsLanguage deriving (Show, Eq)
foreign import ccall "prototype/doubt-difftool/doubt-difftool-Bridging-Header.h ts_language_c" ts_language_c :: IO (Ptr TSLanguage)
data TSDocument = TsDocument deriving (Show, Eq)
foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_make" ts_document_make :: IO (Ptr TSDocument)
foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_set_language" ts_document_set_language :: Ptr TSDocument -> Ptr TSLanguage -> IO ()
foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_set_input_string" ts_document_set_input_string :: Ptr TSDocument -> CString -> IO ()
foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_parse" ts_document_parse :: Ptr TSDocument -> IO ()
foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_free" ts_document_free :: Ptr TSDocument -> IO ()
data TSLength = TsLength { bytes :: CSize, chars :: CSize }
deriving (Show, Eq)
data TSNode = TsNode { _data :: Ptr (), offset :: TSLength }
deriving (Show, Eq)
instance Storable TSNode where
alignment n = 24
sizeOf n = 24
peek p = error "Haskell code should never read TSNode values directly."
poke p n = error "Haskell code should never write TSNode values directly."
foreign import ccall "app/bridge.h ts_document_root_node_p" ts_document_root_node_p :: Ptr TSDocument -> Ptr TSNode -> IO ()
foreign import ccall "app/bridge.h ts_node_p_name" ts_node_p_name :: Ptr TSNode -> Ptr TSDocument -> IO CString
foreign import ccall "app/bridge.h ts_node_p_named_child_count" ts_node_p_named_child_count :: Ptr TSNode -> IO CSize
foreign import ccall "app/bridge.h ts_node_p_named_child" ts_node_p_named_child :: Ptr TSNode -> CSize -> Ptr TSNode -> IO CSize
foreign import ccall "app/bridge.h ts_node_p_pos_chars" ts_node_p_pos_chars :: Ptr TSNode -> IO CSize
foreign import ccall "app/bridge.h ts_node_p_size_chars" ts_node_p_size_chars :: Ptr TSNode -> IO CSize
foreign import ccall "app/bridge.h ts_node_p_start_point" ts_node_p_start_point :: Ptr TSNode -> IO CSize
foreign import ccall "app/bridge.h ts_node_p_end_point" ts_node_p_end_point :: Ptr TSNode -> IO CSize
data Output = Unified | Split
data Argument = Argument { output :: Output, sourceA :: FilePath, sourceB :: FilePath }
arguments :: Parser Argument
arguments = Argument
<$> (flag Split Unified (long "unified" <> help "output a unified diff")
<|> flag' Split (long "split" <> help "output a split diff"))
<*> argument str (metavar "FILE a")
<*> argument str (metavar "FILE b")
main :: IO ()
main = do
arguments <- execParser opts
output <- do
aContents <- readFile $ sourceA arguments
bContents <- readFile $ sourceB arguments
aTerm <- parseTreeSitterFile aContents
bTerm <- parseTreeSitterFile bContents
let diff = interpret comparable aTerm bTerm in
case output arguments of
Unified -> unified diff aContents bContents
Split -> split diff aContents bContents
ByteString.putStr output where
opts = info (helper <*> arguments)
(fullDesc <> progDesc "Diff some things" <> header "semantic-diff - diff semantically")
parseTreeSitterFile :: String -> IO (Term String Info)
parseTreeSitterFile contents = do
document <- ts_document_make
language <- ts_language_c
ts_document_set_language document language
withCString contents (\source -> do
ts_document_set_input_string document source
ts_document_parse document
term <- documentToTerm document contents
ts_document_free document
return term)
documentToTerm :: Ptr TSDocument -> String -> IO (Term String Info)
documentToTerm document contents = alloca $ \root -> do
ts_document_root_node_p document root
snd <$> toTerm root where
toTerm :: Ptr TSNode -> IO (String, Term String Info)
toTerm node = do
name <- ts_node_p_name node document
name <- peekCString name
children <- withNamedChildren node toTerm
range <- range node
lineRange <- getLineRange node
annotation <- return . Info range lineRange $ singleton name
return (name, annotation :< case children of
[] -> Leaf $ substring range contents
_ | member name keyedProductions -> Keyed $ Map.fromList children
_ | member name fixedProductions -> Fixed $ fmap snd children
_ | otherwise -> Indexed $ fmap snd children)
keyedProductions = fromList [ "object" ]
fixedProductions = fromList [ "pair", "rel_op", "math_op", "bool_op", "bitwise_op", "type_op", "math_assignment", "assignment", "subscript_access", "member_access", "new_expression", "function_call", "function", "ternary" ]
withNamedChildren :: Ptr TSNode -> (Ptr TSNode -> IO (String, a)) -> IO [(String, a)]
withNamedChildren node transformNode = do
count <- ts_node_p_named_child_count node
if count == 0
then return []
else mapM (alloca . getChild) [0..pred count] where
getChild n out = do
ts_node_p_named_child node n out
transformNode out
range :: Ptr TSNode -> IO Range
range node = do
pos <- ts_node_p_pos_chars node
size <- ts_node_p_size_chars node
return Range { start = fromEnum $ toInteger pos, end = (fromEnum $ toInteger pos) + (fromEnum $ toInteger size) }
getLineRange :: Ptr TSNode -> IO Range
getLineRange node = do
startLine <- ts_node_p_start_point node
endLine <- ts_node_p_end_point node
return Range { start = fromEnum $ toInteger startLine, end = fromEnum $ toInteger endLine }