Distribution.PackageDescription.Parse

This defined parsers and partial pretty printers for the .cabal format. Some of the complexity in this module is due to the fact that we have to be backwards compatible with old .cabal files, so there's code to translate into the newer structure.

Package descriptions

readPackageDescription :: Verbosity -> FilePath -> IO GenericPackageDescription

Parse the given package file.

writePackageDescription :: FilePath -> PackageDescription -> IO ()

parsePackageDescription :: String -> ParseResult GenericPackageDescription

Parses the given file into a GenericPackageDescription.

In Cabal 1.2 the syntax for package descriptions was changed to a format with sections and possibly indented property descriptions.

showPackageDescription :: PackageDescription -> String

Parsing

data ParseResult a

Constructors

ParseFailed PError

ParseOk [PWarning] a

Instances

Monad ParseResult

Methods

(>>=) :: ParseResult a -> (a -> ParseResult b) -> ParseResult b

(>>) :: ParseResult a -> ParseResult b -> ParseResult b

return :: a -> ParseResult a

fail :: String -> ParseResult a

Functor ParseResult

Methods

fmap :: (a -> b) -> ParseResult a -> ParseResult b

(<$) :: a -> ParseResult b -> ParseResult a

MonadFail ParseResult

Methods

fail :: String -> ParseResult a

Applicative ParseResult

Methods

pure :: a -> ParseResult a

(<*>) :: ParseResult (a -> b) -> ParseResult a -> ParseResult b

(*>) :: ParseResult a -> ParseResult b -> ParseResult b

(<*) :: ParseResult a -> ParseResult b -> ParseResult a

Show a => Show (ParseResult a)

Methods

showsPrec :: Int -> ParseResult a -> ShowS

show :: ParseResult a -> String

showList :: [ParseResult a] -> ShowS

data FieldDescr a

Field descriptor. The parameter a parameterizes over where the field's value is stored in.

Constructors

FieldDescr

Fields

• fieldName :: String
• fieldGet :: a -> Doc
• fieldSet :: LineNo -> String -> a -> ParseResult a

  fieldSet n str x Parses the field value from the given input string str and stores the result in x if the parse was successful. Otherwise, reports an error on line number n.

type LineNo = Int

Supplementary build information

readHookedBuildInfo :: Verbosity -> FilePath -> IO HookedBuildInfo

parseHookedBuildInfo :: String -> ParseResult HookedBuildInfo

writeHookedBuildInfo :: FilePath -> HookedBuildInfo -> IO ()

showHookedBuildInfo :: HookedBuildInfo -> String

pkgDescrFieldDescrs :: [FieldDescr PackageDescription]

libFieldDescrs :: [FieldDescr Library]

executableFieldDescrs :: [FieldDescr Executable]

binfoFieldDescrs :: [FieldDescr BuildInfo]

sourceRepoFieldDescrs :: [FieldDescr SourceRepo]

testSuiteFieldDescrs :: [FieldDescr TestSuiteStanza]

flagFieldDescrs :: [FieldDescr Flag]