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# Copyright 1999-2011 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# $Header: /var/cvsroot/gentoo-x86/eclass/ghc-package.eclass,v 1.31 2011/08/22 04:46:31 vapier Exp $
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# @ECLASS: ghc-package.eclass
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# @MAINTAINER:
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# "Gentoo's Haskell Language team" <haskell@gentoo.org>
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# @AUTHOR:
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# Original Author: Andres Loeh <kosmikus@gentoo.org>
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# @BLURB: This eclass helps with the Glasgow Haskell Compiler's package configuration utility.
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# @DESCRIPTION:
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# Helper eclass to handle ghc installation/upgrade/deinstallation process.
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inherit versionator
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# @FUNCTION: ghc-getghc
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# @DESCRIPTION:
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# returns the name of the ghc executable
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ghc-getghc() {
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type -P ghc
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}
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# @FUNCTION: ghc-getghcpkg
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# @DESCRIPTION:
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# Internal function determines returns the name of the ghc-pkg executable
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ghc-getghcpkg() {
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type -P ghc-pkg
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}
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# @FUNCTION: ghc-getghcpkgbin
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# @DESCRIPTION:
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# returns the name of the ghc-pkg binary (ghc-pkg
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# itself usually is a shell script, and we have to
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# bypass the script under certain circumstances);
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# for Cabal, we add an empty global package config file,
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# because for some reason the global package file
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# must be specified
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ghc-getghcpkgbin() {
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if version_is_at_least "6.10" "$(ghc-version)"; then
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# the ghc-pkg executable changed name in ghc 6.10, as it no longer needs
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# the wrapper script with the static flags
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echo '[]' > "${T}/empty.conf"
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echo "$(ghc-libdir)/ghc-pkg" "--global-conf=${T}/empty.conf"
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elif ghc-cabal; then
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echo '[]' > "${T}/empty.conf"
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echo "$(ghc-libdir)/ghc-pkg.bin" "--global-conf=${T}/empty.conf"
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else
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echo "$(ghc-libdir)/ghc-pkg.bin"
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fi
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}
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# @FUNCTION: ghc-version
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# @DESCRIPTION:
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# returns the version of ghc
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_GHC_VERSION_CACHE=""
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ghc-version() {
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if [[ -z "${_GHC_VERSION_CACHE}" ]]; then
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_GHC_VERSION_CACHE="$($(ghc-getghc) --numeric-version)"
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fi
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echo "${_GHC_VERSION_CACHE}"
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}
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# @FUNCTION: ghc-cabal
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# @DESCRIPTION:
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# this function can be used to determine if ghc itself
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# uses the Cabal package format; it has nothing to do
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# with the Cabal libraries ... ghc uses the Cabal package
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# format since version 6.4
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ghc-cabal() {
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version_is_at_least "6.4" "$(ghc-version)"
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}
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# @FUNCTION: ghc-bestcabalversion
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# @DESCRIPTION:
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# return the best version of the Cabal library that is available
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ghc-bestcabalversion() {
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local cabalversion
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if ghc-cabal; then
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# We ask portage, not ghc, so that we only pick up
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# portage-installed cabal versions.
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cabalversion="$(ghc-extractportageversion dev-haskell/cabal)"
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echo "Cabal-${cabalversion}"
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else
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# older ghc's don't support package versioning
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echo Cabal
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fi
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}
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# @FUNCTION: ghc-sanecabal
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# @DESCRIPTION:
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# check if a standalone Cabal version is available for the
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# currently used ghc; takes minimal version of Cabal as
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# an optional argument
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ghc-sanecabal() {
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local f
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local version
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if [[ -z "$1" ]]; then version="1.0.1"; else version="$1"; fi
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for f in $(ghc-confdir)/cabal-*; do
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[[ -f "${f}" ]] && version_is_at_least "${version}" "${f#*cabal-}" && return
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done
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return 1
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}
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# @FUNCTION: ghc-saneghc
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# @DESCRIPTION:
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# checks if ghc and ghc-bin are installed in the same version
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# (if they're both installed); if this is not the case, we
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# unfortunately cannot trust portage's dependency resolution
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ghc-saneghc() {
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local ghcversion
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local ghcbinversion
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if [[ "${PN}" == "ghc" || "${PN}" == "ghc-bin" ]]; then
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return
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fi
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if has_version dev-lang/ghc && has_version dev-lang/ghc-bin; then
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ghcversion="$(ghc-extractportageversion dev-lang/ghc)"
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ghcbinversion="$(ghc-extractportageversion dev-lang/ghc-bin)"
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if [[ "${ghcversion}" != "${ghcbinversion}" ]]; then
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return 1
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fi
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fi
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return
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}
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# @FUNCTION: ghc-supports-shared-libraries
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# @DESCRIPTION:
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# checks if ghc is built with support for building
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# shared libraries (aka '-dynamic' option)
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ghc-supports-shared-libraries() {
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$(ghc-getghc) --info | grep "RTS ways" | grep -q "dyn"
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}
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# @FUNCTION: ghc-extractportageversion
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# @DESCRIPTION:
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# extract the version of a portage-installed package
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ghc-extractportageversion() {
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local pkg
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local version
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pkg="$(best_version $1)"
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version="${pkg#$1-}"
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version="${version%-r*}"
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version="${version%_pre*}"
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echo "${version}"
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}
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# @FUNCTION: ghc-libdir
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# @DESCRIPTION:
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# returns the library directory
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_GHC_LIBDIR_CACHE=""
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ghc-libdir() {
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if [[ -z "${_GHC_LIBDIR_CACHE}" ]]; then
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_GHC_LIBDIR_CACHE="$($(ghc-getghc) --print-libdir)"
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fi
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echo "${_GHC_LIBDIR_CACHE}"
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}
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# @FUNCTION: ghc-confdir
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# @DESCRIPTION:
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# returns the (Gentoo) library configuration directory
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ghc-confdir() {
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echo "$(ghc-libdir)/gentoo"
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}
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# @FUNCTION: ghc-localpkgconf
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# @DESCRIPTION:
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# returns the name of the local (package-specific)
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# package configuration file
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ghc-localpkgconf() {
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echo "${PF}.conf"
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}
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# @FUNCTION: ghc-makeghcilib
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# @DESCRIPTION:
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# make a ghci foo.o file from a libfoo.a file
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ghc-makeghcilib() {
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local outfile
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outfile="$(dirname $1)/$(basename $1 | sed 's:^lib\?\(.*\)\.a$:\1.o:')"
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ld --relocatable --discard-all --output="${outfile}" --whole-archive "$1"
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}
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# @FUNCTION: ghc-package-exists
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# @DESCRIPTION:
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# tests if a ghc package exists
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ghc-package-exists() {
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local describe_flag
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if version_is_at_least "6.4" "$(ghc-version)"; then
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describe_flag="describe"
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else
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describe_flag="--show-package"
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fi
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$(ghc-getghcpkg) "${describe_flag}" "$1" > /dev/null 2>&1
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}
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# @FUNCTION: ghc-setup-pkg
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# @DESCRIPTION:
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# creates a local (package-specific) package
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# configuration file; the arguments should be
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# uninstalled package description files, each
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# containing a single package description; if
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# no arguments are given, the resulting file is
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# empty
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ghc-setup-pkg() {
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local localpkgconf
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localpkgconf="${S}/$(ghc-localpkgconf)"
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echo '[]' > "${localpkgconf}"
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local update_flag
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if version_is_at_least "6.4" "$(ghc-version)"; then
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update_flag="update -"
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else
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update_flag="--update-package"
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fi
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for pkg in $*; do
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$(ghc-getghcpkgbin) -f "${localpkgconf}" ${update_flag} --force \
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< "${pkg}" || die "failed to register ${pkg}"
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done
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}
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# @FUNCTION: ghc-fixlibpath
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# @DESCRIPTION:
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# fixes the library and import directories path
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# of the package configuration file
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ghc-fixlibpath() {
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sed -i "s|$1|$(ghc-libdir)|g" "${S}/$(ghc-localpkgconf)"
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if [[ -n "$2" ]]; then
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sed -i "s|$2|$(ghc-libdir)/imports|g" "${S}/$(ghc-localpkgconf)"
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fi
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}
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# @FUNCTION: ghc-install-pkg
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# @DESCRIPTION:
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# moves the local (package-specific) package configuration
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# file to its final destination
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ghc-install-pkg() {
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mkdir -p "${D}/$(ghc-confdir)"
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cat "${S}/$(ghc-localpkgconf)" | sed "s|${D}||g" \
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> "${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
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}
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# @FUNCTION: ghc-register-pkg
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# @DESCRIPTION:
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# registers all packages in the local (package-specific)
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# package configuration file
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ghc-register-pkg() {
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local localpkgconf
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localpkgconf="$(ghc-confdir)/$1"
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local update_flag
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local describe_flag
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if version_is_at_least "6.4" "$(ghc-version)"; then
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update_flag="update -"
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describe_flag="describe"
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else
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update_flag="--update-package"
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describe_flag="--show-package"
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fi
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if [[ -f "${localpkgconf}" ]]; then
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for pkg in $(ghc-listpkg "${localpkgconf}"); do
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ebegin "Registering ${pkg} "
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$(ghc-getghcpkgbin) -f "${localpkgconf}" "${describe_flag}" "${pkg}" \
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| $(ghc-getghcpkg) ${update_flag} --force > /dev/null
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eend $?
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done
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fi
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}
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# @FUNCTION: ghc-reregister
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# @DESCRIPTION:
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# re-adds all available .conf files to the global
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# package conf file, to be used on a ghc reinstallation
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ghc-reregister() {
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has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
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einfo "Re-adding packages (may cause several harmless warnings) ..."
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PATH="${EPREFIX}/usr/bin:${PATH}" CONFDIR="$(ghc-confdir)"
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if [ -d "${CONFDIR}" ]; then
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pushd "${CONFDIR}" > /dev/null
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for conf in *.conf; do
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PATH="${EPREFIX}/usr/bin:${PATH}" ghc-register-pkg "${conf}"
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done
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popd > /dev/null
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fi
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}
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# @FUNCTION: ghc-unregister-pkg
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# @DESCRIPTION:
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# unregisters a package configuration file
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# protected are all packages that are still contained in
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# another package configuration file
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ghc-unregister-pkg() {
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local localpkgconf
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local i
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local pkg
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local unregister_flag
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localpkgconf="$(ghc-confdir)/$1"
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if version_is_at_least "6.4" "$(ghc-version)"; then
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unregister_flag="unregister"
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else
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unregister_flag="--remove-package"
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fi
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if [[ -f "${localpkgconf}" ]]; then
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for pkg in $(ghc-reverse "$(ghc-listpkg ${localpkgconf})"); do
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if ! ghc-package-exists "${pkg}"; then
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einfo "Package ${pkg} is not installed for ghc-$(ghc-version)."
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else
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ebegin "Unregistering ${pkg} "
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$(ghc-getghcpkg) "${unregister_flag}" "${pkg}" --force > /dev/null
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eend $?
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fi
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done
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fi
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}
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# @FUNCTION: ghc-reverse
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# @DESCRIPTION:
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# help-function: reverse a list
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ghc-reverse() {
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local result
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local i
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for i in $1; do
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result="${i} ${result}"
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done
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echo "${result}"
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}
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# @FUNCTION: ghc-elem
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# @DESCRIPTION:
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# help-function: element-check
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ghc-elem() {
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local i
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for i in $2; do
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[[ "$1" == "${i}" ]] && return 0
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done
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return 1
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}
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# @FUNCTION: ghc-listpkg
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# @DESCRIPTION:
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# show the packages in a package configuration file
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ghc-listpkg() {
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local ghcpkgcall
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local i
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local extra_flags
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if version_is_at_least '6.12.3' "$(ghc-version)"; then
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extra_flags="${extra_flags} -v0"
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fi
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for i in $*; do
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if ghc-cabal; then
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echo $($(ghc-getghcpkg) list ${extra_flags} -f "${i}") \
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| sed \
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-e "s|^.*${i}:\([^:]*\).*$|\1|" \
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-e "s|/.*$||" \
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-e "s|,| |g" -e "s|[(){}]||g"
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else
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echo $($(ghc-getghcpkgbin) -l -f "${i}") \
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| cut -f2 -d':' \
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| sed 's:,: :g'
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fi
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done
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}
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# @FUNCTION: ghc-package_pkg_setup
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# @DESCRIPTION:
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# exported function: check if we have a consistent ghc installation
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ghc-package_pkg_setup() {
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if ! ghc-saneghc; then
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eerror "You have inconsistent versions of dev-lang/ghc and dev-lang/ghc-bin"
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eerror "installed. Portage currently cannot work correctly with this setup."
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eerror "There are several possibilities to work around this problem:"
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eerror "(1) Up/downgrade ghc-bin to the same version as ghc."
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eerror "(2) Unmerge ghc-bin."
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eerror "(3) Unmerge ghc."
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eerror "You probably want option 1 or 2."
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die "Inconsistent versions of ghc and ghc-bin."
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fi
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}
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# @FUNCTION: ghc-package_pkg_postinst
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# @DESCRIPTION:
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# exported function: registers the package-specific package
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# configuration file
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ghc-package_pkg_postinst() {
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ghc-register-pkg "$(ghc-localpkgconf)"
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}
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# @FUNCTION: ghc-package_pkg_prerm
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# @DESCRIPTION:
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# exported function: unregisters the package-specific package
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# configuration file; a package contained therein is unregistered
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# only if it the same package is not also contained in another
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# package configuration file ...
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ghc-package_pkg_prerm() {
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ghc-unregister-pkg "$(ghc-localpkgconf)"
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}
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EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_prerm
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