GHC.Unit.Info

Info about installed units (compiled libraries)

Documentation

data GenericUnitInfo srcpkgid srcpkgname uid modulename mod

Information about an unit (a unit is an installed module library).

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

Some types are left as parameters to be instantiated differently in ghc-pkg and in ghc itself.

Constructors

GenericUnitInfo

Fields

• unitId :: uid

  Unique unit identifier that is used during compilation (e.g. to generate symbols).

• unitInstanceOf :: uid

  Identifier of an indefinite unit (i.e. with module holes) that this unit is an instance of.

  For non instantiated units, unitInstanceOf=unitId

• unitInstantiations :: [(modulename, mod)]

  How this unit instantiates some of its module holes. Map hole module names to actual module

• unitPackageId :: srcpkgid

  Source package identifier.

  Cabal instantiates this with Distribution.Types.PackageId.PackageId type which only contains the source package name and version. Notice that it doesn't contain the Hackage revision, nor any kind of hash.

• unitPackageName :: srcpkgname

  Source package name

• unitPackageVersion :: Version

  Source package version

• unitComponentName :: Maybe srcpkgname

  Name of the component.

  Cabal supports more than one components (libraries, executables, testsuites) in the same package. Each component has a name except the default one (that can only be a library component) for which we use Nothing.

  GHC only deals with "library" components as they are the only kind of components that can be registered in a database and used by other modules.

• unitAbiHash :: ShortText

  ABI hash used to avoid mixing up units compiled with different dependencies, compiler, options, etc.

• unitDepends :: [uid]

  Identifiers of the units this one depends on

• unitAbiDepends :: [(uid, ShortText)]

  Like unitDepends, but each dependency is annotated with the ABI hash we expect the dependency to respect.

• unitImportDirs :: [FilePathST]

  Directories containing module interfaces

• unitLibraries :: [ShortText]

  Names of the Haskell libraries provided by this unit

• unitExtDepLibsSys :: [ShortText]

  Names of the external system libraries that this unit depends on. See also unitExtDepLibsGhc field.

• unitExtDepLibsGhc :: [ShortText]

  Because of slight differences between the GHC dynamic linker (in GHC.Runtime.Linker) and the native system linker, some packages have to link with a different list of libraries when using GHC's. Examples include: libs that are actually gnu ld scripts, and the possibility that the .a libs do not exactly match the .so/.dll equivalents.

  If this field is set, then we use that instead of the unitExtDepLibsSys field.

• unitLibraryDirs :: [FilePathST]

  Directories containing libraries provided by this unit. See also unitLibraryDynDirs.

  It seems to be used to store paths to external library dependencies too.

• unitLibraryDynDirs :: [FilePathST]

  Directories containing the dynamic libraries provided by this unit. See also unitLibraryDirs.

  It seems to be used to store paths to external dynamic library dependencies too.

• unitExtDepFrameworks :: [ShortText]

  Names of the external MacOS frameworks that this unit depends on.

• unitExtDepFrameworkDirs :: [FilePathST]

  Directories containing MacOS frameworks that this unit depends on.

• unitLinkerOptions :: [ShortText]

  Linker (e.g. ld) command line options

• unitCcOptions :: [ShortText]

  C compiler options that needs to be passed to the C compiler when we compile some C code against this unit.

• unitIncludes :: [ShortText]

  C header files that are required by this unit (provided by this unit or external)

• unitIncludeDirs :: [FilePathST]

  Directories containing C header files that this unit depends on.

• unitHaddockInterfaces :: [FilePathST]

  Paths to Haddock interface files for this unit

• unitHaddockHTMLs :: [FilePathST]

  Paths to Haddock directories containing HTML files

• unitExposedModules :: [(modulename, Maybe mod)]

  Modules exposed by the unit.

  A module can be re-exported from another package. In this case, we indicate the module origin in the second parameter.

• unitHiddenModules :: [modulename]

  Hidden modules.

  These are useful for error reporting (e.g. if a hidden module is imported)

• unitIsIndefinite :: Bool

  True if this unit has some module holes that need to be instantiated with real modules to make the unit usable (a.k.a. Backpack).

• unitIsExposed :: Bool

  True if the unit is exposed. A unit could be installed in a database by "disabled" by not being exposed.

• unitIsTrusted :: Bool

  True if the unit is trusted (cf Safe Haskell)

Instances

Binary DbUnitInfo

Defined in GHC.Unit.Database

Methods

put :: DbUnitInfo -> Put

get :: Get DbUnitInfo

putList :: [DbUnitInfo] -> Put

(Show uid, Show modulename, Show mod, Show srcpkgid, Show srcpkgname) => Show (GenericUnitInfo srcpkgid srcpkgname uid modulename mod)

Defined in GHC.Unit.Database

Methods

showsPrec :: Int -> GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> ShowS

show :: GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> String

showList :: [GenericUnitInfo srcpkgid srcpkgname uid modulename mod] -> ShowS

(Eq uid, Eq modulename, Eq mod, Eq srcpkgid, Eq srcpkgname) => Eq (GenericUnitInfo srcpkgid srcpkgname uid modulename mod)

Defined in GHC.Unit.Database

Methods

(==) :: GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool

(/=) :: GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> GenericUnitInfo srcpkgid srcpkgname uid modulename mod -> Bool

type GenUnitInfo unit = GenericUnitInfo PackageId PackageName unit ModuleName (GenModule (GenUnit unit))

Information about an installed unit

We parameterize on the unit identifier: * UnitKey: identifier used in the database (cf UnitKeyInfo) * UnitId: identifier used to generate code (cf UnitInfo)

These two identifiers are different for wired-in packages. See Note [About units] in GHC.Unit

type UnitInfo = GenUnitInfo UnitId

Information about an installed unit (units are identified by their internal UnitId)

newtype UnitKey

A unit key in the database

Constructors

UnitKey FastString

Instances

IsUnitId UnitKey

Defined in GHC.Unit.Types

Methods

unitFS :: UnitKey -> FastString

type UnitKeyInfo = GenUnitInfo UnitKey

Information about an installed unit (units are identified by their database UnitKey)

mkUnitKeyInfo :: DbUnitInfo -> UnitKeyInfo

Convert a DbUnitInfo (read from a package database) into UnitKeyInfo

mapUnitInfo :: IsUnitId v => (u -> v) -> GenUnitInfo u -> GenUnitInfo v

Map over the unit parameter

mkUnitPprInfo :: (u -> FastString) -> GenUnitInfo u -> UnitPprInfo

Create a UnitPprInfo from a UnitInfo

mkUnit :: UnitInfo -> Unit

Make a Unit from a UnitInfo

If the unit is definite, make a RealUnit from unitId field.

If the unit is indefinite, make a VirtUnit from unitInstanceOf and unitInstantiations fields. Note that in this case we don't keep track of unitId. It can be retrieved later with "improvement", i.e. matching on `unitInstanceOf/unitInstantiations` fields (see Note [About units] in GHC.Unit).

newtype PackageId

Constructors

PackageId FastString

Instances

Uniquable PackageId

Defined in GHC.Unit.Info

Methods

getUnique :: PackageId -> Unique

Outputable PackageId

Defined in GHC.Unit.Info

Methods

ppr :: PackageId -> SDoc

Eq PackageId

Defined in GHC.Unit.Info

Methods

(==) :: PackageId -> PackageId -> Bool

(/=) :: PackageId -> PackageId -> Bool

newtype PackageName

Constructors

PackageName

Fields

• unPackageName :: FastString

Instances

Uniquable PackageName

Defined in GHC.Unit.Info

Methods

getUnique :: PackageName -> Unique

Outputable PackageName

Defined in GHC.Unit.Info

Methods

ppr :: PackageName -> SDoc

Eq PackageName

Defined in GHC.Unit.Info

Methods

(==) :: PackageName -> PackageName -> Bool

(/=) :: PackageName -> PackageName -> Bool

data Version

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

Data Version

Since: base-4.7.0.0

Defined in Data.Data

Methods

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

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

toConstr :: Version -> Constr

dataTypeOf :: Version -> DataType

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

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

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

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

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

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

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

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

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

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

IsList Version

Since: base-4.8.0.0

Defined in GHC.Exts

Associated Types

type Item Version

Methods

fromList :: [Item Version] -> Version

fromListN :: Int -> [Item Version] -> Version

toList :: Version -> [Item Version]

Generic Version

Defined in Data.Version

Associated Types

type Rep Version :: Type -> Type

Methods

from :: Version -> Rep Version x

to :: Rep Version x -> Version

Read Version

Since: base-2.1

Defined in Data.Version

Methods

readsPrec :: Int -> ReadS Version

readList :: ReadS [Version]

readPrec :: ReadPrec Version

readListPrec :: ReadPrec [Version]

Show Version

Since: base-2.1

Defined in Data.Version

Methods

showsPrec :: Int -> Version -> ShowS

show :: Version -> String

showList :: [Version] -> ShowS

Binary Version

Since: binary-0.8.0.0

Defined in Data.Binary.Class

Methods

put :: Version -> Put

get :: Get Version

putList :: [Version] -> Put

NFData Version

Since: deepseq-1.3.0.0

Defined in Control.DeepSeq

Methods

rnf :: Version -> ()

Eq Version

Since: base-2.1

Defined in Data.Version

Methods

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

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

Ord Version

Since: base-2.1

Defined in Data.Version

Methods

compare :: Version -> Version -> Ordering

(<) :: Version -> Version -> Bool

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

(>) :: Version -> Version -> Bool

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

max :: Version -> Version -> Version

min :: Version -> Version -> Version

type Item Version

Defined in GHC.Exts

type Item Version = Int

type Rep Version

Since: base-4.9.0.0

Defined in Data.Version

type Rep Version = D1 ('MetaData "Version" "Data.Version" "base" 'False) (C1 ('MetaCons "Version" 'PrefixI 'True) (S1 ('MetaSel ('Just "versionBranch") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Int]) :*: S1 ('MetaSel ('Just "versionTags") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [String])))

unitPackageNameString :: GenUnitInfo u -> String

unitPackageIdString :: GenUnitInfo u -> String

pprUnitInfo :: UnitInfo -> SDoc

collectIncludeDirs :: [UnitInfo] -> [FilePath]

Find all the include directories in the given units

collectExtraCcOpts :: [UnitInfo] -> [String]

Find all the C-compiler options in the given units

collectLibraryDirs :: Ways -> [UnitInfo] -> [FilePath]

Find all the library directories in the given units for the given ways

collectFrameworks :: [UnitInfo] -> [String]

Find all the frameworks in the given units

collectFrameworksDirs :: [UnitInfo] -> [String]

Find all the package framework paths in these and the preload packages

unitHsLibs :: GhcNameVersion -> Ways -> UnitInfo -> [String]