diff options
| -rw-r--r-- | eclass/alternatives-2.eclass | 50 |
1 files changed, 46 insertions, 4 deletions
diff --git a/eclass/alternatives-2.eclass b/eclass/alternatives-2.eclass index f83c47908..bc60108e7 100644 --- a/eclass/alternatives-2.eclass +++ b/eclass/alternatives-2.eclass @@ -7,6 +7,16 @@ # Copyright 2008, 2009 Mike Kelly # Copyright 2009 David Leverton +# @ECLASS: alternatives-2 +# @MAINTAINER: +# Gentoo Science Project <sci@gentoo.org> +# @BLURB: Manage alternative implementations. +# @DESCRIPTION: +# Autogenerate eselect modules for alternatives and ensure that valid provider +# is set. +# +# Remove eselect modules when last provider is unmerged. +# # If your package provides pkg_postinst or pkg_prerm phases, you need to be # sure you explicitly run alternatives-2_pkg_{postinst,prerm} where appropriate. @@ -21,8 +31,6 @@ case "${EAPI:-0}" in ;; esac -ALTERNATIVES_DIR="/etc/env.d/alternatives" - DEPEND=">=app-admin/eselect-1.4-r100" RDEPEND="${DEPEND} !app-admin/eselect-blas @@ -31,9 +39,24 @@ RDEPEND="${DEPEND} EXPORT_FUNCTIONS pkg_postinst pkg_prerm -# alternatives_for alternative provider importance source target [ source target [...]] -alternatives_for() { +# @ECLASS-VARIABLE: ALTERNATIVES_DIR +# @INTERNAL +# @DESCRIPTION: +# Alternatives directory with symlinks managed by eselect. +ALTERNATIVES_DIR="/etc/env.d/alternatives" +# @FUNCTION: alternatives_for +# @USAGE: alternative provider importance source target [source target [...]] +# @DESCRIPTION: +# Set up alternative provider. +# +# EXAMPLE: +# @CODE +# alternatives_for cblas atlas 0 \ +# /usr/$(get_libdir)/pkgconfig/cblas.pc atlas-cblas.pc \ +# /usr/include/cblas.h atlas/cblas.h +# @CODE +alternatives_for() { (( $# >= 5 )) && (( ($#-3)%2 == 0)) || die "${FUNCNAME} requires exactly 3+N*2 arguments where N>=1" local alternative=${1} provider=${2} importance=${3} index src target ret=0 shift 3 @@ -106,6 +129,10 @@ alternatives_for() { [[ ${ret} -eq 0 ]] || die "Errors detected for ${provider}, provided for ${alternative}" } +# @FUNCTION: cleanup_old_alternatives_module +# @USAGE: alternative +# @DESCRIPTION: +# Remove old alternatives module. cleanup_old_alternatives_module() { local alt=${1} old_module="${EROOT%/}/usr/share/eselect/modules/${alt}.eselect" if [[ -f "${old_module}" && "$(source "${old_module}" &>/dev/null; echo "${ALTERNATIVE}")" == "${alt}" ]]; then @@ -117,6 +144,14 @@ cleanup_old_alternatives_module() { fi } +# @FUNCTION: alternatives-2_pkg_postinst +# @DESCRIPTION: +# Create eselect modules for all provided alternatives if necessary and ensure +# that valid provider is set. +# +# Also remove old eselect modules for provided alternatives. +# +# Provided alternatives are set up using alternatives_for(). alternatives-2_pkg_postinst() { local a alt provider module_version="20090908" local EAUTO="${EROOT%/}/usr/share/eselect/modules/auto" @@ -149,6 +184,13 @@ alternatives-2_pkg_postinst() { done } +# @FUNCTION: alternatives-2_pkg_prerm +# @DESCRIPTION: +# Ensure a valid provider is set in case the package is unmerged and +# remove autogenerated eselect modules for all alternatives when last +# provider is unmerged. +# +# Provided alternatives are set up using alternatives_for(). alternatives-2_pkg_prerm() { local a alt provider ignore local EAUTO="${EROOT%/}/usr/share/eselect/modules/auto" |