Portability	portable
Maintainer	cabal-devel@haskell.org
Safe Haskell	None

Distribution.PackageDescription.Parse

Contents

Package descriptions
- Parsing
- Supplementary build information

Description

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.

Synopsis

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
Functor ParseResult
Applicative ParseResult
Show a => Show (ParseResult a)

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]