Gentoo Development Guide

HASKELL-CABAL.ECLASS

Section: portage (5)
Updated: Mar 2019
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NAME

haskell-cabal.eclass - for packages that make use of the Haskell Common Architecture for Building Applications and Libraries (cabal)

DESCRIPTION

Basic instructions:

Before inheriting the eclass, set CABAL_FEATURES to reflect the tools and features that the package makes use of.

Currently supported features:
  haddock    --  for documentation generation
  hscolour   --  generation of colourised sources
  hoogle     --  generation of documentation search index
  profile    --  if package supports to build profiling-enabled libraries
  bootstrap  --  only used for the cabal package itself
  lib        --  the package installs libraries
  nocabaldep --  don't add dependency on cabal.
                 only used for packages that _must_ not pull the dependency
                 on cabal, but still use this eclass (e.g. haskell-updater).
  ghcdeps    --  constraint dependency on package to ghc onces
                 only used for packages that use libghc internally and _must_
                 not pull upper versions
  test-suite --  add support for cabal test-suites (introduced in Cabal-1.8)

FUNCTIONS

cabal_flag

ebuild.sh:use_enable() taken as base

Usage examples:

CABAL_CONFIGURE_FLAGS=$(cabal_flag gui)
leads to "--flags=gui" or "--flags=-gui" (useflag 'gui')

CABAL_CONFIGURE_FLAGS=$(cabal_flag gtk gui)
also leads to "--flags=gui" or " --flags=-gui" (useflag 'gtk')

cabal_chdeps

Allows easier patching of $CABAL_FILE (${S}/${PN}.cabal by default) depends

Accepts argument list as pairs of substitutions: <from-string> <to-string>...

Dies on error.

Usage examples:

src_prepare() {
   cabal_chdeps        'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7'        'containers ==0.4.*' 'containers >= 0.4 && < 0.6' } or src_prepare() {
   CABAL_FILE=${S}/${MY_PN}.cabal cabal_chdeps        'base >= 4.2 && < 4.6' 'base >= 4.2 && < 4.7'
   CABAL_FILE=${S}/${MY_PN}-tools.cabal cabal_chdeps        'base == 3.*' 'base >= 4.2 && < 4.7' }

cabal-constraint

Allowes to set contraint to the libraries that are used by specified package

replace-hcflags <old> <new>

Replace the <old> flag with <new> in HCFLAGS. Accepts shell globs for <old>. The implementation is picked from flag-o-matic.eclass:replace-flags()

ECLASS VARIABLES

CABAL_EXTRA_CONFIGURE_FLAGS: User-specified additional parameters passed to 'setup configure'. example: /etc/portage/make.conf:
CABAL_EXTRA_CONFIGURE_FLAGS="--enable-shared --enable-executable-dynamic"
CABAL_EXTRA_BUILD_FLAGS: User-specified additional parameters passed to 'setup build'. example: /etc/portage/make.conf: CABAL_EXTRA_BUILD_FLAGS=-v
GHC_BOOTSTRAP_FLAGS: User-specified additional parameters for ghc when building _only_ 'setup' binary bootstrap. example: /etc/portage/make.conf: GHC_BOOTSTRAP_FLAGS=-dynamic to make linking 'setup' faster.
CABAL_EXTRA_TEST_FLAGS: User-specified additional parameters passed to 'setup test'. example: /etc/portage/make.conf:
CABAL_EXTRA_TEST_FLAGS="-v3 --show-details=streaming"
CABAL_DEBUG_LOOSENING: Show debug output for 'cabal_chdeps' function if set. Needs working 'diff'.

AUTHORS

Original author: Andres Loeh <kosmikus@gentoo.org>
Original author: Duncan Coutts <dcoutts@gentoo.org>

MAINTAINERS

Haskell herd <haskell@gentoo.org>

REPORTING BUGS

Please report bugs via https://bugs.gentoo.org/

FILES

haskell-cabal.eclass

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Time: 03:25:05 GMT, March 20, 2019