Cabal-1.4.0.0: A framework for packaging Haskell softwareContentsIndex
Distribution.Package
Portabilityportable
Stabilityalpha
MaintainerIsaac Jones <ijones@syntaxpolice.org>
Contents
Package ids
Package dependencies
Package classes
Deprecated compat stuff
Description
Packages are fundamentally just a name and a version.
Synopsis
data PackageIdentifier = PackageIdentifier {
pkgName :: String
pkgVersion :: Version
}
parsePackageName :: ReadP r String
data Dependency = Dependency String VersionRange
thisPackageVersion :: PackageIdentifier -> Dependency
notThisPackageVersion :: PackageIdentifier -> Dependency
class Package pkg where
packageId :: pkg -> PackageIdentifier
packageName :: Package pkg => pkg -> String
packageVersion :: Package pkg => pkg -> Version
class Package pkg => PackageFixedDeps pkg where
depends :: pkg -> [PackageIdentifier]
showPackageId :: PackageIdentifier -> String
Package ids
data PackageIdentifier
The name and version of a package.
Constructors
PackageIdentifier
pkgName :: StringThe name of this package, eg. foo
pkgVersion :: Versionthe version of this package, eg 1.2
show/hide Instances
parsePackageName :: ReadP r String
Package dependencies
data Dependency
Constructors
Dependency String VersionRange
show/hide Instances
thisPackageVersion :: PackageIdentifier -> Dependency
notThisPackageVersion :: PackageIdentifier -> Dependency
Package classes
class Package pkg where

Class of things that can be identified by a PackageIdentifier

Types in this class are all notions of a package. This allows us to have different types for the different phases that packages go though, from simple name/id, package description, configured or installed packages.

Methods
packageId :: pkg -> PackageIdentifier
show/hide Instances
packageName :: Package pkg => pkg -> String
packageVersion :: Package pkg => pkg -> Version
class Package pkg => PackageFixedDeps pkg where

Subclass of packages that have specific versioned dependencies.

So for example a not-yet-configured package has dependencies on version ranges, not specific versions. A configured or an already installed package depends on exact versions. Some operations or data structures (like dependency graphs) only make sense on this subclass of package types.

Methods
depends :: pkg -> [PackageIdentifier]
show/hide Instances
Deprecated compat stuff
showPackageId :: PackageIdentifier -> String
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