Distribution.Simple

Cabal-1.10.2.0: A framework for packaging Haskell software

Portability | portable
Maintainer | cabal-devel@haskell.org

Distribution.Simple

Contents

- Simple interface
- Customization
  - Standard sets of hooks
  - Utils

Description

This is the command line front end to the Simple build system. When given the parsed command-line args and package information, is able to perform basic commands like configure, build, install, register, etc.

This module exports the main functions that Setup.hs scripts use. It re-exports the `UserHooks` type, the standard entry points like `defaultMain` and `defaultMainWithHooks` and the predefined sets of `UserHooks` that custom `Setup.hs` scripts can extend to add their own behaviour.

This module isn't called "Simple" because it's simple. Far from it. It's called "Simple" because it does complicated things to simple software.

The original idea was that there could be different build systems that all presented the same compatible command line interfaces. There is still a Distribution.Make system but in practice no packages use it.

Synopsis

- module Distribution.Package
- module Distribution.Version
- module Distribution.License
- module Distribution.Simple.Compiler
- module Language.Haskell.Extension
- defaultMain :: IO ()
- defaultMainNoRead :: GenericPackageDescription -> IO ()
- defaultMainArgs :: [String] -> IO ()
- data UserHooks = UserHooks {
  - runTests :: Args -> Bool -> PackageDescription -> LocalBuildInfo -> IO ()
  - readDesc :: IO (Maybe GenericPackageDescription)
  - hookedPreProcessors :: [PPSuffixHandler]
  - hookedPrograms :: [Program]
  - preConf :: Args -> ConfigFlags -> IO HookedBuildInfo
  - confHook :: (GenericPackageDescription, HookedBuildInfo) -> ConfigFlags -> IO LocalBuildInfo
  - postConf :: Args -> ConfigFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  - preBuild :: Args -> BuildFlags -> IO HookedBuildInfo
  - buildHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> BuildFlags -> IO ()
  - postBuild :: Args -> BuildFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  - preClean :: Args -> CleanFlags -> IO HookedBuildInfo
  - cleanHook :: PackageDescription -> () -> UserHooks -> CleanFlags -> IO ()
  - postClean :: Args -> CleanFlags -> PackageDescription -> () -> IO ()
  - preCopy :: Args -> CopyFlags -> IO HookedBuildInfo
  - copyHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> CopyFlags -> IO ()
  - postCopy :: Args -> CopyFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  - preInst :: Args -> InstallFlags -> IO HookedBuildInfo
  - instHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> InstallFlags -> IO ()
  - postInst :: Args -> InstallFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  - preSDist :: Args -> SDistFlags -> IO HookedBuildInfo
  - sDistHook :: PackageDescription -> Maybe LocalBuildInfo -> UserHooks -> SDistFlags -> IO ()
  - postSDist :: Args -> SDistFlags -> PackageDescription -> Maybe LocalBuildInfo -> IO ()
  - preReg :: Args -> RegisterFlags -> IO HookedBuildInfo
  - regHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> RegisterFlags -> IO ()
  - postReg :: Args -> RegisterFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  - preUnreg :: Args -> RegisterFlags -> IO HookedBuildInfo
  - unregHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> RegisterFlags -> IO ()
  - postUnreg :: Args -> RegisterFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  - preHscolour :: Args -> HscolourFlags -> IO HookedBuildInfo
  - hscolourHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> HscolourFlags -> IO ()
  - postHscolour :: Args -> HscolourFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  - preHaddock :: Args -> HaddockFlags -> IO HookedBuildInfo
  - haddockHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> HaddockFlags -> IO ()
  - postHaddock :: Args -> HaddockFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  - preTest :: Args -> TestFlags -> IO HookedBuildInfo
  - testHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> TestFlags -> IO ()
  - postTest :: Args -> TestFlags -> PackageDescription -> LocalBuildInfo -> IO ()
  }
- type Args = [String]
- defaultMainWithHooks :: UserHooks -> IO ()
- defaultMainWithHooksArgs :: UserHooks -> [String] -> IO ()
- simpleUserHooks :: UserHooks
- autoconfUserHooks :: UserHooks
- defaultUserHooks :: UserHooks
- emptyUserHooks :: UserHooks
- defaultHookedPackageDesc :: IO (Maybe FilePath)

# Documentation

module Distribution.Package

module Distribution.Version

module Distribution.License

module Distribution.Simple.Compiler

module Language.Haskell.Extension

# Simple interface

defaultMain :: IO ()

A simple implementation of `main` for a Cabal setup script. It reads the package description file using IO, and performs the action specified on the command line.

defaultMainNoRead :: GenericPackageDescription -> IO ()

Like `defaultMain`, but accepts the package description as input rather than using IO to read it.

defaultMainArgs :: [String] -> IO ()

A version of `defaultMain` that is passed the command line arguments, rather than getting them from the environment.

# Customization

data UserHooks

Hooks allow authors to add specific functionality before and after a command is run, and also to specify additional preprocessors.

- WARNING: The hooks interface is under rather constant flux as we try to understand users needs. Setup files that depend on this interface may break in future releases.

Constructors

UserHooks |
Fields runTests :: Args -> Bool -> PackageDescription -> LocalBuildInfo -> IO () Used for `./setup test` readDesc :: IO (Maybe GenericPackageDescription) Read the description file hookedPreProcessors :: [PPSuffixHandler] Custom preprocessors in addition to and overriding `knownSuffixHandlers`. hookedPrograms :: [Program] These programs are detected at configure time. Arguments for them are added to the configure command. preConf :: Args -> ConfigFlags -> IO HookedBuildInfo Hook to run before configure command confHook :: (GenericPackageDescription, HookedBuildInfo) -> ConfigFlags -> IO LocalBuildInfo Over-ride this hook to get different behavior during configure. postConf :: Args -> ConfigFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after configure command preBuild :: Args -> BuildFlags -> IO HookedBuildInfo Hook to run before build command. Second arg indicates verbosity level. buildHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> BuildFlags -> IO () Over-ride this hook to gbet different behavior during build. postBuild :: Args -> BuildFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after build command. Second arg indicates verbosity level. preClean :: Args -> CleanFlags -> IO HookedBuildInfo Hook to run before clean command. Second arg indicates verbosity level. cleanHook :: PackageDescription -> () -> UserHooks -> CleanFlags -> IO () Over-ride this hook to get different behavior during clean. postClean :: Args -> CleanFlags -> PackageDescription -> () -> IO () Hook to run after clean command. Second arg indicates verbosity level. preCopy :: Args -> CopyFlags -> IO HookedBuildInfo Hook to run before copy command copyHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> CopyFlags -> IO () Over-ride this hook to get different behavior during copy. postCopy :: Args -> CopyFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after copy command preInst :: Args -> InstallFlags -> IO HookedBuildInfo Hook to run before install command instHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> InstallFlags -> IO () Over-ride this hook to get different behavior during install. postInst :: Args -> InstallFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after install command. postInst should be run on the target, not on the build machine. preSDist :: Args -> SDistFlags -> IO HookedBuildInfo Hook to run before sdist command. Second arg indicates verbosity level. sDistHook :: PackageDescription -> Maybe LocalBuildInfo -> UserHooks -> SDistFlags -> IO () Over-ride this hook to get different behavior during sdist. postSDist :: Args -> SDistFlags -> PackageDescription -> Maybe LocalBuildInfo -> IO () Hook to run after sdist command. Second arg indicates verbosity level. preReg :: Args -> RegisterFlags -> IO HookedBuildInfo Hook to run before register command regHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> RegisterFlags -> IO () Over-ride this hook to get different behavior during registration. postReg :: Args -> RegisterFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after register command preUnreg :: Args -> RegisterFlags -> IO HookedBuildInfo Hook to run before unregister command unregHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> RegisterFlags -> IO () Over-ride this hook to get different behavior during registration. postUnreg :: Args -> RegisterFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after unregister command preHscolour :: Args -> HscolourFlags -> IO HookedBuildInfo Hook to run before hscolour command. Second arg indicates verbosity level. hscolourHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> HscolourFlags -> IO () Over-ride this hook to get different behavior during hscolour. postHscolour :: Args -> HscolourFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after hscolour command. Second arg indicates verbosity level. preHaddock :: Args -> HaddockFlags -> IO HookedBuildInfo Hook to run before haddock command. Second arg indicates verbosity level. haddockHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> HaddockFlags -> IO () Over-ride this hook to get different behavior during haddock. postHaddock :: Args -> HaddockFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after haddock command. Second arg indicates verbosity level. preTest :: Args -> TestFlags -> IO HookedBuildInfo Hook to run before test command. testHook :: PackageDescription -> LocalBuildInfo -> UserHooks -> TestFlags -> IO () Over-ride this hook to get different behavior during test. postTest :: Args -> TestFlags -> PackageDescription -> LocalBuildInfo -> IO () Hook to run after test command.

type Args = [String]

defaultMainWithHooks :: UserHooks -> IO ()

A customizable version of `defaultMain`.

defaultMainWithHooksArgs :: UserHooks -> [String] -> IO ()

A customizable version of `defaultMain` that also takes the command line arguments.

## Standard sets of hooks

simpleUserHooks :: UserHooks

Hooks that correspond to a plain instantiation of the "simple" build system

autoconfUserHooks :: UserHooks

defaultUserHooks :: UserHooks

Basic autoconf `UserHooks`:

- `postConf` runs `./configure`, if present.
- the pre-hooks `preBuild`, `preClean`, `preCopy`, `preInst`, `preReg` and `preUnreg` read additional build information from package`.buildinfo`, if present.

Thus `configure` can use local system information to generate package`.buildinfo` and possibly other files.

emptyUserHooks :: UserHooks

Empty `UserHooks` which do nothing.

## Utils

defaultHookedPackageDesc :: IO (Maybe FilePath)

Optional auxiliary package information file (pkgname`.buildinfo`)