initial commit of office-ext.eclass that will allow us to package {libre,open}office...

diff --git a/eclass/office-ext.eclass b/eclass/office-ext.eclass
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+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/office-ext.eclass,v 1.1 2011/09/05 08:25:58 scarabeus Exp $
+
+# @ECLASS: office-ext.eclass
+# @AUTHOR:
+# Tomáš Chvátal <scarabeus@gentoo.org>
+# @MAINTAINER:
+# The office team <openoffice@gentoo.org>
+# @BLURB: Eclass for installing libreoffice/openoffice extensions
+# @DESCRIPTION:
+# Eclass for easing maitenance of libreoffice/openoffice extensions.
+
+case "${EAPI:-0}" in
+       4) OEXT_EXPORTED_FUNCTIONS="src_install pkg_postinst pkg_prerm" ;;
+       *) die "EAPI=${EAPI} is not supported" ;;
+esac
+
+EXPORT_FUNCTIONS ${OEXT_EXPORTED_FUNCTIONS}
+unset OEXT_EXPORTED_FUNCTIONS
+
+inherit eutils multilib
+
+UNOPKG_BINARY="${EPREFIX}/usr/bin/unopkg"
+
+# @ECLASS-VARIABLE: OO_EXTENSIONS
+# @REQUIRED
+# @DESCRIPTION:
+# Array containing list of extensions to install.
+[[ -z ${OO_EXTENSIONS} ]] && die "OO_EXTENSIONS variable is unset."
+if [[ "$(declare -p OO_EXTENSIONS 2>/dev/null 2>&1)" != "declare -a"* ]]; then
+       die "OO_EXTENSIONS variable is not an array."
+fi
+
+DEPEND="virtual/ooo"
+RDEPEND="virtual/ooo"
+
+# @FUNCTION: office-ext_flush_unopkg_cache
+# @DESCRIPTION:
+# Flush the cache after removal of an extension.
+office-ext_flush_unopkg_cache() {
+       debug-print-function ${FUNCNAME} "$@"
+
+       debug-print "${FUNCNAME}: ${UNOPKG_BINARY} list --shared > /dev/null"
+       ${UNOPKG_BINARY} list --shared > /dev/null
+}
+
+# @FUNCTION: office-ext_get_implementation
+# @DESCRIPTION:
+# Determine the implementation we are building against.
+office-ext_get_implementation() {
+       debug-print-function ${FUNCNAME} "$@"
+       local implementations=(
+               "libreoffice"
+               "openoffice"
+       )
+       local i
+
+       for i in "${implementations[@]}"; do
+               if [[ -d "${EPREFIX}/usr/$(get_libdir)/${i}" ]]; then
+                       debug-print "${FUNCNAME}: Determined implementation is: \"${EPREFIX}/usr/$(get_libdir)/${i}\""
+                       echo "${EPREFIX}/usr/$(get_libdir)/${i}"
+                       return
+               fi
+       done
+
+       die "Unable to determine libreoffice/openoffice implementation!"
+}
+
+# @FUNCTION: office-ext_add_extension
+# @DESCRIPTION:
+# Install the extension into the libreoffice/openoffice.
+office-ext_add_extension() {
+       debug-print-function ${FUNCNAME} "$@"
+       local ext=$1
+       local tmpdir=$(mktemp -d --tmpdir="${T}")
+
+       debug-print "${FUNCNAME}: ${UNOPKG_BINARY} add --shared \"${ext}\""
+       ebegin "Adding extension: \"${ext}\""
+       ${UNOPKG_BINARY} add --shared "${ext}" \
+               "-env:UserInstallation=file:///${tmpdir}" \
+               "-env:JFW_PLUGIN_DO_NOT_CHECK_ACCESSIBILITY=1"
+       eend $?
+       rm -rf "${tmpdir}"
+}
+
+# @FUNCTION: office-ext_remove_extension
+# @DESCRIPTION:
+# Remove the extension from the libreoffice/openoffice.
+office-ext_remove_extension() {
+       debug-print-function ${FUNCNAME} "$@"
+       local ext=$1
+       local tmpdir=$(mktemp -d --tmpdir="${T}")
+
+       debug-print "${FUNCNAME}: ${UNOPKG_BINARY} remove --shared \"${ext}\""
+       ebegin "Removing extension: \"${ext}\""
+       ${UNOPKG_BINARY} remove --shared "${ext}" \
+               "-env:UserInstallation=file:///${tmpdir}" \
+               "-env:JFW_PLUGIN_DO_NOT_CHECK_ACCESSIBILITY=1"
+       eend $?
+       flush_unopkg_cache
+       rm -rf "${tmpdir}"
+}
+
+# @FUNCTION: office-ext_src_install
+# @DESCRIPTION:
+# Install the extension source to the proper location.
+office-ext_src_install() {
+       debug-print-function ${FUNCNAME} "$@"
+       local i
+
+       # subshell to not pollute rest of the env with the insinto redefinition
+       (
+               insinto $(openoffice-ext_get_implementation)/share/extension/install/
+               for i in "${OO_EXTENSIONS[@]}"; do
+                       doins "${i}"
+               done
+       )
+
+       einfo "Remember that if you replace your office implementation,"
+       einfo "you need to recompile all the extensions."
+       einfo "Your current implementation location is: "
+       einfo "    $(openoffice-ext_get_implementation)"
+}
+
+# @FUNCTION: office-ext_pkg_postinst
+# @DESCRIPTION:
+# Add the extensions to the libreoffice/openoffice.
+office-ext_pkg_postinst() {
+       debug-print-function ${FUNCNAME} "$@"
+       local i
+
+       for i in "${OO_EXTENSIONS[$@]}"; do
+               openoffice-ext_add_extension "${i}"
+       done
+
+}
+
+# @FUNCTION: office-ext_pkg_prerm
+# @DESCRIPTION:
+# Remove the extensions from the libreoffice/openoffice.
+office-ext_pkg_prerm() {
+       debug-print-function ${FUNCNAME} "$@"
+       local i
+
+       for i in "${OO_EXTENSIONS[@]}"; do
+               openoffice-ext_remove_extension "${i}"
+       done
+}