Packages

ghc-7.6.3: The GHC API

Safe Haskell | None

Packages

Contents

- The PackageConfigMap
- Reading the package config, and processing cmdline args
- Inspecting the set of packages in scope
- Utils

Description

Package manipulation

Synopsis

- module PackageConfig
- type PackageConfigMap = UniqFM PackageConfig
- emptyPackageConfigMap :: PackageConfigMap
- lookupPackage :: PackageConfigMap -> PackageId -> Maybe PackageConfig
- extendPackageConfigMap :: PackageConfigMap -> [PackageConfig] -> PackageConfigMap
- dumpPackages :: DynFlags -> IO ()
- data PackageState = PackageState {
  - pkgIdMap :: PackageConfigMap
  - preloadPackages :: [PackageId]
  - moduleToPkgConfAll :: UniqFM [(PackageConfig, Bool)]
  - installedPackageIdMap :: InstalledPackageIdMap
  }
- initPackages :: DynFlags -> IO (DynFlags, [PackageId])
- getPackageDetails :: PackageState -> PackageId -> PackageConfig
- lookupModuleInAllPackages :: DynFlags -> ModuleName -> [(PackageConfig, Bool)]
- lookupModuleWithSuggestions :: DynFlags -> ModuleName -> Either [Module] [(PackageConfig, Bool)]
- getPackageIncludePath :: DynFlags -> [PackageId] -> IO [String]
- getPackageLibraryPath :: DynFlags -> [PackageId] -> IO [String]
- getPackageLinkOpts :: DynFlags -> [PackageId] -> IO [String]
- getPackageExtraCcOpts :: DynFlags -> [PackageId] -> IO [String]
- getPackageFrameworkPath :: DynFlags -> [PackageId] -> IO [String]
- getPackageFrameworks :: DynFlags -> [PackageId] -> IO [String]
- getPreloadPackagesAnd :: DynFlags -> [PackageId] -> IO [PackageConfig]
- collectIncludeDirs :: [PackageConfig] -> [FilePath]
- collectLibraryPaths :: [PackageConfig] -> [FilePath]
- collectLinkOpts :: DynFlags -> [PackageConfig] -> [String]
- packageHsLibs :: DynFlags -> PackageConfig -> [String]
- isDllName :: PackageId -> Name -> Bool

# Documentation

module PackageConfig

# The PackageConfigMap

type PackageConfigMap = UniqFM PackageConfig

A PackageConfigMap maps a `PackageId` to a `PackageConfig`

emptyPackageConfigMap :: PackageConfigMap

lookupPackage :: PackageConfigMap -> PackageId -> Maybe PackageConfig

Find the package we know about with the given id (e.g. "foo-1.0"), if any

extendPackageConfigMap :: PackageConfigMap -> [PackageConfig] -> PackageConfigMap

dumpPackages :: DynFlags -> IO ()

Show package info on console, if verbosity is >= 3

# Reading the package config, and processing cmdline args

data PackageState

Package state is all stored in `DynFlag`s, including the details of all packages, which packages are exposed, and which modules they provide.

The package state is computed by `initPackages`, and kept in DynFlags.

- `-package pkg` causes `pkg` to become exposed, and all other packages with the same name to become hidden.
- `-hide-package pkg` causes `pkg` to become hidden.
- Let `exposedPackages` be the set of packages thus exposed. Let `depExposedPackages` be the transitive closure from `exposedPackages` of their dependencies.
- When searching for a module from an preload import declaration, only the exposed modules in `exposedPackages` are valid.
- When searching for a module from an implicit import, all modules from `depExposedPackages` are valid.
- When linking in a compilation manager mode, we link in packages the program depends on (the compiler knows this list by the time it gets to the link step). Also, we link in all packages which were mentioned with preload `-package` flags on the command-line, or are a transitive dependency of same, or are "base"/"rts". The reason for this is that we might need packages which don't contain any Haskell modules, and therefore won't be discovered by the normal mechanism of dependency tracking.

Constructors

PackageState |
Fields pkgIdMap :: PackageConfigMap preloadPackages :: [PackageId] moduleToPkgConfAll :: UniqFM [(PackageConfig, Bool)] installedPackageIdMap :: InstalledPackageIdMap

initPackages :: DynFlags -> IO (DynFlags, [PackageId])

Call this after `parseDynFlags`. It reads the package database files, and sets up various internal tables of package information, according to the package-related flags on the command-line (`-package`, `-hide-package` etc.)

Returns a list of packages to link in if we're doing dynamic linking. This list contains the packages that the user explicitly mentioned with `-package` flags.

`initPackages` can be called again subsequently after updating the `packageFlags` field of the `DynFlags`, and it will update the `pkgState` in `DynFlags` and return a list of packages to link in.

getPackageDetails :: PackageState -> PackageId -> PackageConfig

Looks up the package with the given id in the package state, panicing if it is not found

lookupModuleInAllPackages :: DynFlags -> ModuleName -> [(PackageConfig, Bool)]

Takes a `Module`, and if the module is in a package returns `(pkgconf, exposed)` where pkgconf is the PackageConfig for that package, and exposed is `True` if the package exposes the module.

lookupModuleWithSuggestions :: DynFlags -> ModuleName -> Either [Module] [(PackageConfig, Bool)]

# Inspecting the set of packages in scope

getPackageIncludePath :: DynFlags -> [PackageId] -> IO [String]

Find all the include directories in these and the preload packages

getPackageLibraryPath :: DynFlags -> [PackageId] -> IO [String]

Find all the library paths in these and the preload packages

getPackageLinkOpts :: DynFlags -> [PackageId] -> IO [String]

Find all the link options in these and the preload packages

getPackageExtraCcOpts :: DynFlags -> [PackageId] -> IO [String]

Find all the C-compiler options in these and the preload packages

getPackageFrameworkPath :: DynFlags -> [PackageId] -> IO [String]

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

getPackageFrameworks :: DynFlags -> [PackageId] -> IO [String]

Find all the package frameworks in these and the preload packages

getPreloadPackagesAnd :: DynFlags -> [PackageId] -> IO [PackageConfig]

Find all the `PackageConfig` in both the preload packages from `DynFlags` and corresponding to the list of `PackageConfig`s

collectIncludeDirs :: [PackageConfig] -> [FilePath]

collectLibraryPaths :: [PackageConfig] -> [FilePath]

collectLinkOpts :: DynFlags -> [PackageConfig] -> [String]

packageHsLibs :: DynFlags -> PackageConfig -> [String]

# Utils

isDllName :: PackageId -> Name -> Bool

Will the `Name` come from a dynamically linked library?