ghc-8.0.1: The GHC API

Safe HaskellNone
LanguageHaskell2010

PackageConfig

Contents

Description

Package configuration information: essentially the interface to Cabal, with some utilities

(c) The University of Glasgow, 2004

Synopsis

Documentation

Mostly the compiler deals in terms of UnitIds, which are md5 hashes of a package ID, keys of its dependencies, and Cabal flags. You're expected to pass in the unit id in the -this-unit-id flag. However, for wired-in packages like base & rts, we don't necessarily know what the version is, so these are handled specially; see .

UnitId

packageConfigId :: PackageConfig -> UnitId Source #

Get the GHC UnitId right out of a Cabalish PackageConfig

The PackageConfig type: information about a package

data InstalledPackageInfo srcpkgid srcpkgname unitid modulename :: * -> * -> * -> * -> * Source #

This is a subset of Cabal's InstalledPackageInfo, with just the bits that GHC is interested in.

Instances

(Eq srcpkgid, Eq srcpkgname, Eq unitid, Eq modulename) => Eq (InstalledPackageInfo srcpkgid srcpkgname unitid modulename) 

Methods

(==) :: InstalledPackageInfo srcpkgid srcpkgname unitid modulename -> InstalledPackageInfo srcpkgid srcpkgname unitid modulename -> Bool #

(/=) :: InstalledPackageInfo srcpkgid srcpkgname unitid modulename -> InstalledPackageInfo srcpkgid srcpkgname unitid modulename -> Bool #

(Show srcpkgid, Show srcpkgname, Show unitid, Show modulename) => Show (InstalledPackageInfo srcpkgid srcpkgname unitid modulename) 

Methods

showsPrec :: Int -> InstalledPackageInfo srcpkgid srcpkgname unitid modulename -> ShowS Source #

show :: InstalledPackageInfo srcpkgid srcpkgname unitid modulename -> String Source #

showList :: [InstalledPackageInfo srcpkgid srcpkgname unitid modulename] -> ShowS Source #

RepInstalledPackageInfo a b c d => Binary (InstalledPackageInfo a b c d) 

data Version :: * Source #

A Version represents the version of a software entity.

An instance of Eq is provided, which implements exact equality modulo reordering of the tags in the versionTags field.

An instance of Ord is also provided, which gives lexicographic ordering on the versionBranch fields (i.e. 2.1 > 2.0, 1.2.3 > 1.2.2, etc.). This is expected to be sufficient for many uses, but note that you may need to use a more specific ordering for your versioning scheme. For example, some versioning schemes may include pre-releases which have tags "pre1", "pre2", and so on, and these would need to be taken into account when determining ordering. In some cases, date ordering may be more appropriate, so the application would have to look for date tags in the versionTags field and compare those. The bottom line is, don't always assume that compare and other Ord operations are the right thing for every Version.

Similarly, concrete representations of versions may differ. One possible concrete representation is provided (see showVersion and parseVersion), but depending on the application a different concrete representation may be more appropriate.

Constructors

Version 

Fields

  • versionBranch :: [Int]

    The numeric branch for this version. This reflects the fact that most software versions are tree-structured; there is a main trunk which is tagged with versions at various points (1,2,3...), and the first branch off the trunk after version 3 is 3.1, the second branch off the trunk after version 3 is 3.2, and so on. The tree can be branched arbitrarily, just by adding more digits.

    We represent the branch as a list of Int, so version 3.2.1 becomes [3,2,1]. Lexicographic ordering (i.e. the default instance of Ord for [Int]) gives the natural ordering of branches.

  • versionTags :: [String]

    A version can be tagged with an arbitrary list of strings. The interpretation of the list of tags is entirely dependent on the entity that this version applies to.

Instances

IsList Version

Since: 4.8.0.0

Eq Version 

Methods

(==) :: Version -> Version -> Bool #

(/=) :: Version -> Version -> Bool #

Data Version 

Methods

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

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

toConstr :: Version -> Constr Source #

dataTypeOf :: Version -> DataType Source #

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

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

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

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

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

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

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

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

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

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

Ord Version 
Read Version 
Show Version 
Generic Version 

Associated Types

type Rep Version :: * -> * Source #

Binary Version

Since: 0.8.0.0

type Rep Version 
type Item Version