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Exact lookup

1. lookupInternalDependency :: InstalledPackageIndex -> PackageName -> VersionRange -> LibraryName -> [(Version, [InstalledPackageInfo])]

   Cabal	Distribution.Simple.PackageIndex

   Does a lookup by source package name and a range of versions. We get back any number of versions of the specified package name, all satisfying the version range constraint. INVARIANT: List of eligible InstalledPackageInfo is non-empty.

2. lookupPackageId :: PackageIndex a -> PackageId -> Maybe a

   Cabal	Distribution.Simple.PackageIndex

   Convenient alias of lookupSourcePackageId, but assuming only one package per package ID.

3. lookupPackageName :: PackageIndex a -> PackageName -> [(Version, [a])]

   Cabal	Distribution.Simple.PackageIndex

   Does a lookup by source package name.

4. lookupSourcePackageId :: PackageIndex a -> PackageId -> [a]

   Cabal	Distribution.Simple.PackageIndex

   Does a lookup by source package id (name & version). There can be multiple installed packages with the same source PackageId but different UnitId. They are returned in order of preference, with the most preferred first.

5. lookupUnitId :: PackageIndex a -> UnitId -> Maybe a

   Cabal	Distribution.Simple.PackageIndex

   Does a lookup by unit identifier. Since multiple package DBs mask each other by UnitId, then we get back at most one package.

6. lookupKnownProgram :: String -> ProgramDb -> Maybe Program

   Cabal	Distribution.Simple.Program

   No documentation available.

7. lookupProgram :: Program -> ProgramDb -> Maybe ConfiguredProgram

   Cabal	Distribution.Simple.Program

   Try to find a configured program

8. lookupProgramVersion :: Verbosity -> Program -> VersionRange -> ProgramDb -> IO (Either CabalException (ConfiguredProgram, Version, ProgramDb))

   Cabal	Distribution.Simple.Program

   Check that a program is configured and available to be run. Additionally check that the program version number is suitable and return it. For example you could require AnyVersion or orLaterVersion (Version [1,0] []) It returns the configured program, its version number and a possibly updated ProgramDb. If the program could not be configured or the version is unsuitable, it returns an error value.

9. lookupKnownProgram :: String -> ProgramDb -> Maybe Program

   Cabal	Distribution.Simple.Program.Db

   No documentation available.

10. lookupProgram :: Program -> ProgramDb -> Maybe ConfiguredProgram

    Cabal	Distribution.Simple.Program.Db

    Try to find a configured program

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