Cabal-3.5.0.0: A framework for packaging Haskell software
Safe HaskellSafe-Inferred
LanguageHaskell2010

Distribution.Types.Flag

Synopsis

Package flag

data PackageFlag Source #

A flag can represent a feature to be included, or a way of linking a target against its dependencies, or in fact whatever you can think of.

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Eq PackageFlag # 
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Data PackageFlag # 
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Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> PackageFlag -> c PackageFlag Source #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c PackageFlag Source #

toConstr :: PackageFlag -> Constr Source #

dataTypeOf :: PackageFlag -> DataType Source #

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c PackageFlag) Source #

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c PackageFlag) Source #

gmapT :: (forall b. Data b => b -> b) -> PackageFlag -> PackageFlag Source #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> PackageFlag -> r Source #

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> PackageFlag -> r Source #

gmapQ :: (forall d. Data d => d -> u) -> PackageFlag -> [u] Source #

gmapQi :: Int -> (forall d. Data d => d -> u) -> PackageFlag -> u Source #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> PackageFlag -> m PackageFlag Source #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> PackageFlag -> m PackageFlag Source #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> PackageFlag -> m PackageFlag Source #

Show PackageFlag # 
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Generic PackageFlag # 
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Associated Types

type Rep PackageFlag :: Type -> Type Source #

Binary PackageFlag # 
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NFData PackageFlag # 
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Methods

rnf :: PackageFlag -> () Source #

Structured PackageFlag # 
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type Rep PackageFlag # 
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type Rep PackageFlag = D1 ('MetaData "PackageFlag" "Distribution.Types.Flag" "Cabal-3.5.0.0" 'False) (C1 ('MetaCons "MkPackageFlag" 'PrefixI 'True) ((S1 ('MetaSel ('Just "flagName") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 FlagName) :*: S1 ('MetaSel ('Just "flagDescription") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 String)) :*: (S1 ('MetaSel ('Just "flagDefault") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool) :*: S1 ('MetaSel ('Just "flagManual") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool))))

emptyFlag :: FlagName -> PackageFlag Source #

A PackageFlag initialized with default parameters.

Flag name

data FlagName Source #

A FlagName is the name of a user-defined configuration flag

Use mkFlagName and unFlagName to convert from/to a String.

This type is opaque since Cabal-2.0

Since: Cabal-2.0.0.2

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Eq FlagName # 
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Data FlagName # 
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Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> FlagName -> c FlagName Source #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c FlagName Source #

toConstr :: FlagName -> Constr Source #

dataTypeOf :: FlagName -> DataType Source #

dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c FlagName) Source #

dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c FlagName) Source #

gmapT :: (forall b. Data b => b -> b) -> FlagName -> FlagName Source #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> FlagName -> r Source #

gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> FlagName -> r Source #

gmapQ :: (forall d. Data d => d -> u) -> FlagName -> [u] Source #

gmapQi :: Int -> (forall d. Data d => d -> u) -> FlagName -> u Source #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> FlagName -> m FlagName Source #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> FlagName -> m FlagName Source #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> FlagName -> m FlagName Source #

Ord FlagName # 
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Read FlagName # 
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Show FlagName # 
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IsString FlagName #

mkFlagName

Since: Cabal-2.0.0.2

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Generic FlagName # 
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type Rep FlagName :: Type -> Type Source #

Binary FlagName # 
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NFData FlagName # 
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rnf :: FlagName -> () Source #

Structured FlagName # 
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Pretty FlagName # 
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Parsec FlagName # 
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type Rep FlagName # 
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type Rep FlagName = D1 ('MetaData "FlagName" "Distribution.Types.Flag" "Cabal-3.5.0.0" 'True) (C1 ('MetaCons "FlagName" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ShortText)))

mkFlagName :: String -> FlagName Source #

Construct a FlagName from a String

mkFlagName is the inverse to unFlagName

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

Since: Cabal-2.0.0.2

unFlagName :: FlagName -> String Source #

Convert FlagName to String

Since: Cabal-2.0.0.2

Flag assignment

data FlagAssignment Source #

A FlagAssignment is a total or partial mapping of FlagNames to Bool flag values. It represents the flags chosen by the user or discovered during configuration. For example --flags=foo --flags=-bar becomes [("foo", True), ("bar", False)]

TODO: Why we record the multiplicity of the flag?

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Eq FlagAssignment # 
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Ord FlagAssignment # 
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Read FlagAssignment #

Since: Cabal-2.2.0

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Show FlagAssignment #

Since: Cabal-2.2.0

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Generic FlagAssignment # 
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type Rep FlagAssignment :: Type -> Type Source #

Semigroup FlagAssignment # 
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Monoid FlagAssignment # 
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Binary FlagAssignment # 
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NFData FlagAssignment # 
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rnf :: FlagAssignment -> () Source #

Structured FlagAssignment # 
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Pretty FlagAssignment #

Since: Cabal-3.4.0.0

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Parsec FlagAssignment #
>>> simpleParsec "" :: Maybe FlagAssignment
Just (fromList [])
>>> simpleParsec "+foo -bar" :: Maybe FlagAssignment
Just (fromList [(FlagName "bar",(1,False)),(FlagName "foo",(1,True))])
>>> simpleParsec "-none -any" :: Maybe FlagAssignment
Just (fromList [(FlagName "any",(1,False)),(FlagName "none",(1,False))])
>>> simpleParsec "+foo -foo +foo +foo" :: Maybe FlagAssignment
Just (fromList [(FlagName "foo",(4,True))])
>>> simpleParsec "+foo -bar baz" :: Maybe FlagAssignment
Nothing

Since: Cabal-3.4.0.0

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type Rep FlagAssignment # 
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type Rep FlagAssignment = D1 ('MetaData "FlagAssignment" "Distribution.Types.Flag" "Cabal-3.5.0.0" 'True) (C1 ('MetaCons "FlagAssignment" 'PrefixI 'True) (S1 ('MetaSel ('Just "getFlagAssignment") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Map FlagName (Int, Bool)))))

mkFlagAssignment :: [(FlagName, Bool)] -> FlagAssignment Source #

Construct a FlagAssignment from a list of flag/value pairs.

If duplicate flags occur in the input list, the later entries in the list will take precedence.

Since: Cabal-2.2.0

unFlagAssignment :: FlagAssignment -> [(FlagName, Bool)] Source #

Deconstruct a FlagAssignment into a list of flag/value pairs.

 null (findDuplicateFlagAssignments fa) ==> (mkFlagAssignment . unFlagAssignment) fa == fa

Since: Cabal-2.2.0

lookupFlagAssignment :: FlagName -> FlagAssignment -> Maybe Bool Source #

Lookup the value for a flag

Returns Nothing if the flag isn't contained in the FlagAssignment.

Since: Cabal-2.2.0

insertFlagAssignment :: FlagName -> Bool -> FlagAssignment -> FlagAssignment Source #

Insert or update the boolean value of a flag.

If the flag is already present in the FlagAssigment, the value will be updated and the fact that multiple values have been provided for that flag will be recorded so that a warning can be generated later on.

Since: Cabal-2.2.0

diffFlagAssignment :: FlagAssignment -> FlagAssignment -> FlagAssignment Source #

Remove all flag-assignments from the first FlagAssignment that are contained in the second FlagAssignment

NB/TODO: This currently only removes flag assignments which also match the value assignment! We should review the code which uses this operation to figure out if this it's not enough to only compare the flagnames without the values.

Since: Cabal-2.2.0

findDuplicateFlagAssignments :: FlagAssignment -> [FlagName] Source #

Find the FlagNames that have been listed more than once.

Since: Cabal-2.2.0

nullFlagAssignment :: FlagAssignment -> Bool Source #

Test whether FlagAssignment is empty.

Since: Cabal-2.2.0

showFlagValue :: (FlagName, Bool) -> String Source #

String representation of a flag-value pair.

dispFlagAssignment :: FlagAssignment -> Doc Source #

Pretty-prints a flag assignment.

showFlagAssignment :: FlagAssignment -> String Source #

Show flag assignment.

Since: Cabal-3.4.0.0

parsecFlagAssignment :: CabalParsing m => m FlagAssignment Source #

Parses a flag assignment.

parsecFlagAssignmentNonEmpty :: CabalParsing m => m FlagAssignment Source #

Parse a non-empty flag assignment

The flags have to explicitly start with minus or plus.

Since: Cabal-3.4.0.0

Legacy formats

legacyShowFlagAssignment :: FlagAssignment -> String Source #

We need this as far as we support custom setups older than 2.2.0.0

Since: Cabal-3.4.0.0

legacyParsecFlagAssignment :: CabalParsing m => m FlagAssignment Source #

We need this as far as we support custom setups older than 2.2.0.0

Since: Cabal-3.4.0.0