module Text.Highlighting.Kate.Syntax.Dockerfile
(highlight, parseExpression, syntaxName, syntaxExtensions)
where
import Text.Highlighting.Kate.Types
import Text.Highlighting.Kate.Common
import Text.ParserCombinators.Parsec hiding (State)
import Control.Monad.State
import Data.Char (isSpace)
import qualified Data.Set as Set
syntaxName :: String
syntaxName = "Dockerfile"
syntaxExtensions :: String
syntaxExtensions = "Dockerfile"
highlight :: String -> [SourceLine]
highlight input = evalState (mapM parseSourceLine $ lines input) startingState
parseSourceLine :: String -> State SyntaxState SourceLine
parseSourceLine = mkParseSourceLine (parseExpression Nothing)
parseExpression :: Maybe (String,String)
-> KateParser Token
parseExpression mbcontext = do
(lang,cont) <- maybe currentContext return mbcontext
result <- parseRules (lang,cont)
optional $ do eof
updateState $ \st -> st{ synStPrevChar = '\n' }
pEndLine
return result
startingState = SyntaxState {synStContexts = [("Dockerfile","normal")], synStLineNumber = 0, synStPrevChar = '\n', synStPrevNonspace = False, synStContinuation = False, synStCaseSensitive = True, synStKeywordCaseSensitive = True, synStCaptures = []}
pEndLine = do
updateState $ \st -> st{ synStPrevNonspace = False }
context <- currentContext
contexts <- synStContexts `fmap` getState
st <- getState
if length contexts >= 2
then case context of
_ | synStContinuation st -> updateState $ \st -> st{ synStContinuation = False }
("Dockerfile","normal") -> return ()
("Dockerfile","Comment") -> (popContext) >> pEndLine
("Dockerfile","string\"") -> (popContext) >> pEndLine
("Dockerfile","string'") -> (popContext) >> pEndLine
_ -> return ()
else return ()
withAttribute attr txt = do
when (null txt) $ fail "Parser matched no text"
updateState $ \st -> st { synStPrevChar = last txt
, synStPrevNonspace = synStPrevNonspace st || not (all isSpace txt) }
return (attr, txt)
list_keywords = Set.fromList $ words $ "FROM MAINTAINER ENV RUN ONBUILD COPY ADD VOLUME EXPOSE ENTRYPOINT CMD WORKDIR USER"
parseRules ("Dockerfile","normal") =
(((pDetectSpaces >>= withAttribute NormalTok))
<|>
((pDetectChar False '#' >>= withAttribute CommentTok) >>~ pushContext ("Dockerfile","Comment"))
<|>
((pKeyword " \n\t.():!+,-<=>%&*/;?[]^{|}~\\" list_keywords >>= withAttribute KeywordTok))
<|>
((pDetectIdentifier >>= withAttribute NormalTok))
<|>
((pDetectChar False '"' >>= withAttribute StringTok) >>~ pushContext ("Dockerfile","string\""))
<|>
((pDetectChar False '\'' >>= withAttribute StringTok) >>~ pushContext ("Dockerfile","string'"))
<|>
(currentContext >>= \x -> guard (x == ("Dockerfile","normal")) >> pDefault >>= withAttribute NormalTok))
parseRules ("Dockerfile","Comment") =
(((pLineContinue >>= withAttribute CommentTok))
<|>
(currentContext >>= \x -> guard (x == ("Dockerfile","Comment")) >> pDefault >>= withAttribute CommentTok))
parseRules ("Dockerfile","string\"") =
(((pLineContinue >>= withAttribute NormalTok))
<|>
((pDetectChar False '"' >>= withAttribute StringTok) >>~ (popContext))
<|>
(currentContext >>= \x -> guard (x == ("Dockerfile","string\"")) >> pDefault >>= withAttribute StringTok))
parseRules ("Dockerfile","string'") =
(((pLineContinue >>= withAttribute StringTok))
<|>
((pDetectChar False '\'' >>= withAttribute StringTok) >>~ (popContext))
<|>
(currentContext >>= \x -> guard (x == ("Dockerfile","string'")) >> pDefault >>= withAttribute StringTok))
parseRules x = parseRules ("Dockerfile","normal") <|> fail ("Unknown context" ++ show x)