Safe Haskell	None
Language	Haskell2010

Distribution.Types.MungedPackageName

Synopsis

Documentation

data MungedPackageName Source #

A combination of a package and component name used in various legacy interfaces, chiefly bundled with a version as MungedPackageId. It's generally better to use a UnitId to opaquely refer to some compilation/packing unit, but that doesn't always work, e.g. where a "name" is needed, in which case this can be used as a fallback.

Use mkMungedPackageName and unMungedPackageName to convert from/to a String.

Since: 2.0

Instances

Eq MungedPackageName Source #
Methods (==) :: MungedPackageName -> MungedPackageName -> Bool # (/=) :: MungedPackageName -> MungedPackageName -> Bool #
Data MungedPackageName Source #
Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> MungedPackageName -> c MungedPackageName # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c MungedPackageName # toConstr :: MungedPackageName -> Constr # dataTypeOf :: MungedPackageName -> DataType # dataCast1 :: Typeable (* -> ) t => (forall d. Data d => c (t d)) -> Maybe (c MungedPackageName) # dataCast2 :: Typeable ( -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c MungedPackageName) # gmapT :: (forall b. Data b => b -> b) -> MungedPackageName -> MungedPackageName # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> MungedPackageName -> r # gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> MungedPackageName -> r # gmapQ :: (forall d. Data d => d -> u) -> MungedPackageName -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> MungedPackageName -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> MungedPackageName -> m MungedPackageName # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> MungedPackageName -> m MungedPackageName # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> MungedPackageName -> m MungedPackageName #
Ord MungedPackageName Source #
Methods compare :: MungedPackageName -> MungedPackageName -> Ordering # (<) :: MungedPackageName -> MungedPackageName -> Bool # (<=) :: MungedPackageName -> MungedPackageName -> Bool # (>) :: MungedPackageName -> MungedPackageName -> Bool # (>=) :: MungedPackageName -> MungedPackageName -> Bool # max :: MungedPackageName -> MungedPackageName -> MungedPackageName # min :: MungedPackageName -> MungedPackageName -> MungedPackageName #
Read MungedPackageName Source #
Methods readsPrec :: Int -> ReadS MungedPackageName # readList :: ReadS [MungedPackageName] # readPrec :: ReadPrec MungedPackageName # readListPrec :: ReadPrec [MungedPackageName] #
Show MungedPackageName Source #
Methods showsPrec :: Int -> MungedPackageName -> ShowS # show :: MungedPackageName -> String # showList :: [MungedPackageName] -> ShowS #
IsString MungedPackageName Source #	`mkMungedPackageName` Since: 2.0
Methods fromString :: String -> MungedPackageName #
Generic MungedPackageName Source #
Associated Types type Rep MungedPackageName :: * -> * # Methods from :: MungedPackageName -> Rep MungedPackageName x # to :: Rep MungedPackageName x -> MungedPackageName #
Binary MungedPackageName Source #
Methods put :: MungedPackageName -> Put # get :: Get MungedPackageName # putList :: [MungedPackageName] -> Put #
NFData MungedPackageName Source #
Methods rnf :: MungedPackageName -> () #
Text MungedPackageName Source #
Methods disp :: MungedPackageName -> Doc Source # parse :: ReadP r MungedPackageName Source #
type Rep MungedPackageName Source #
type Rep MungedPackageName = D1 (MetaData "MungedPackageName" "Distribution.Types.MungedPackageName" "Cabal-2.0.0.2-B4YxsRmpeLCDyDZ1N9nEz7" True) (C1 (MetaCons "MungedPackageName" PrefixI False) (S1 (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 ShortText)))

unMungedPackageName :: MungedPackageName -> String Source #

Convert MungedPackageName to String

mkMungedPackageName :: String -> MungedPackageName Source #

Construct a MungedPackageName from a String

mkMungedPackageName is the inverse to unMungedPackageName

Note: No validations are performed to ensure that the resulting MungedPackageName is valid

Since: 2.0

computeCompatPackageName :: PackageName -> Maybe UnqualComponentName -> MungedPackageName Source #

Computes the package name for a library. If this is the public library, it will just be the original package name; otherwise, it will be a munged package name recording the original package name as well as the name of the internal library.

A lot of tooling in the Haskell ecosystem assumes that if something is installed to the package database with the package name foo, then it actually is an entry for the (only public) library in package foo. With internal packages, this is not necessarily true: a public library as well as arbitrarily many internal libraries may come from the same package. To prevent tools from getting confused in this case, the package name of these internal libraries is munged so that they do not conflict the public library proper. A particular case where this matters is ghc-pkg: if we don't munge the package name, the inplace registration will OVERRIDE a different internal library.

We munge into a reserved namespace, "z-", and encode both the component name and the package name of an internal library using the following format:

compat-pkg-name ::= "z-" package-name "-z-" library-name

where package-name and library-name have "-" ( "z" + ) "-" segments encoded by adding an extra "z".

When we have the public library, the compat-pkg-name is just the package-name, no surprises there!

decodeCompatPackageName :: MungedPackageName -> (PackageName, Maybe UnqualComponentName) Source #