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-# Copyright 1999-2009 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Header: $
-#
-# Copyright 2002-2004 Matthew Kennedy <mkennedy@gentoo.org>
-# Copyright 2003      Jeremy Maitin-Shepard <jbms@attbi.com>
-# Copyright 2004-2005 Mamoru Komachi <usata@gentoo.org>
-# Copyright 2007-2008 Christian Faulhammer <fauli@gentoo.org>
-# Copyright 2007-2009 Ulrich Müller <ulm@gentoo.org>
-#
-# @ECLASS: elisp-common.eclass
-# @MAINTAINER:
-# Feel free to contact the Emacs team through <emacs@gentoo.org> if you
-# have problems, suggestions or questions.
-# @BLURB: Emacs-related installation utilities
-# @DESCRIPTION:
-#
-# Usually you want to use this eclass for (optional) GNU Emacs support
-# of your package.  This is NOT for XEmacs!
-#
-# Many of the steps here are sometimes done by the build system of your
-# package (especially compilation), so this is mainly for standalone
-# elisp files you gathered from somewhere else.
-#
-# When relying on the emacs USE flag, you need to add
-#
-#   	emacs? ( virtual/emacs )
-#
-# to your DEPEND/RDEPEND line and use the functions provided here to
-# bring the files to the correct locations.
-#
-# .SS
-# src_compile() usage:
-#
-# An elisp file is compiled by the elisp-compile() function defined
-# here and simply takes the source files as arguments.  The case of
-# interdependent elisp files is also supported, since the current
-# directory is added to the load-path which makes sure that all files
-# are loadable.
-#
-#   	elisp-compile *.el || die
-#
-# Function elisp-make-autoload-file() can be used to generate a file
-# with autoload definitions for the lisp functions.  It takes the output
-# file name (default: "${PN}-autoloads.el") and a list of directories
-# (default: working directory) as its arguments.  Use of this function
-# requires that the elisp source files contain magic ";;;###autoload"
-# comments.  See the Emacs Lisp Reference Manual (node "Autoload") for
-# a detailed explanation.
-#
-# .SS
-# src_install() usage:
-#
-# The resulting compiled files (.elc) should be put in a subdirectory of
-# /usr/share/emacs/site-lisp/ which is named after the first argument
-# of elisp-install().  The following parameters are the files to be put
-# in that directory.  Usually the subdirectory should be ${PN}, you can
-# choose something else, but remember to tell elisp-site-file-install()
-# (see below) the change, as it defaults to ${PN}.
-#
-#   	elisp-install ${PN} *.el *.elc || die
-#
-# To let the Emacs support be activated by Emacs on startup, you need
-# to provide a site file (shipped in ${FILESDIR}) which contains the
-# startup code (have a look in the documentation of your software).
-# Normally this would look like this:
-#
-#   	;;; csv-mode site-lisp configuration
-#
-#   	(add-to-list 'load-path "@SITELISP@")
-#   	(add-to-list 'auto-mode-alist '("\\.csv\\'" . csv-mode))
-#   	(autoload 'csv-mode "csv-mode" "Major mode for csv files." t)
-#
-# If your Emacs support files are installed in a subdirectory of
-# /usr/share/emacs/site-lisp/ (which is strongly recommended), you need
-# to extend Emacs' load-path as shown in the first non-comment line.
-# The elisp-site-file-install() function of this eclass will replace
-# "@SITELISP@" and "@SITEETC@" by the actual paths.
-#
-# The next line tells Emacs to load the mode opening a file ending
-# with ".csv" and load functions depending on the context and needed
-# features.  Be careful though.  Commands as "load-library" or "require"
-# bloat the editor as they are loaded on every startup.  When having
-# many Emacs support files, users may be annoyed by the start-up time.
-# Also avoid keybindings as they might interfere with the user's
-# settings.  Give a hint in pkg_postinst(), which should be enough.
-#
-# The naming scheme for this site-init file matches the shell pattern
-# "[1-8][0-9]*-gentoo*.el", where the two digits at the beginning define
-# the loading order (numbers below 10 or above 89 are reserved for
-# internal use).  So if your initialisation depends on another Emacs
-# package, your site file's number must be higher!
-#
-# Best practice is to define a SITEFILE variable in the global scope of
-# your ebuild (e.g., right after S or RDEPEND):
-#
-#   	SITEFILE="50${PN}-gentoo.el"
-#
-# Which is then installed by
-#
-#   	elisp-site-file-install "${FILESDIR}/${SITEFILE}" || die
-#
-# in src_install().  Any characters after the "-gentoo" part and before
-# the extension will be stripped from the destination file's name.
-# For example, a file "50${PN}-gentoo-${PV}.el" will be installed as
-# "50${PN}-gentoo.el".  If your subdirectory is not named ${PN}, give
-# the differing name as second argument.
-#
-# .SS
-# pkg_postinst() / pkg_postrm() usage:
-#
-# After that you need to recreate the start-up file of Emacs after
-# emerging and unmerging by using
-#
-#   	pkg_postinst() {
-#   		elisp-site-regen
-#   	}
-#
-#   	pkg_postrm() {
-#   		elisp-site-regen
-#   	}
-#
-# When having optional Emacs support, you should prepend "use emacs &&"
-# to above calls of elisp-site-regen().
-# Don't use "has_version virtual/emacs"!  When unmerging the state of
-# the emacs USE flag is taken from the package database and not from the
-# environment, so it is no problem when you unset USE=emacs between
-# merge and unmerge of a package.
-#
-# .SS
-# Miscellaneous functions:
-#
-# elisp-emacs-version() outputs the version of the currently active Emacs.
-
-# @ECLASS-VARIABLE: SITELISP
-# @DESCRIPTION:
-# Directory where packages install Emacs Lisp files.
-SITELISP=/usr/share/emacs/site-lisp
-
-# @ECLASS-VARIABLE: SITEETC
-# @DESCRIPTION:
-# Directory where packages install miscellaneous (not Lisp) files.
-SITEETC=/usr/share/emacs/etc
-
-# @ECLASS-VARIABLE: EMACS
-# @DESCRIPTION:
-# Path of Emacs executable.
-EMACS=/usr/bin/emacs
-
-# @ECLASS-VARIABLE: EMACSFLAGS
-# @DESCRIPTION:
-# Flags for executing Emacs in batch mode.
-# These work for Emacs versions 18-23, so don't change them.
-EMACSFLAGS="-batch -q --no-site-file"
-
-# @ECLASS-VARIABLE: BYTECOMPFLAGS
-# @DESCRIPTION:
-# Emacs flags used for byte-compilation in elisp-compile().
-BYTECOMPFLAGS="-L ."
-
-# @FUNCTION: elisp-compile
-# @USAGE: <list of elisp files>
-# @DESCRIPTION:
-# Byte-compile Emacs Lisp files.
-#
-# This function uses GNU Emacs to byte-compile all ".el" specified by
-# its arguments.  The resulting byte-code (".elc") files are placed in
-# the same directory as their corresponding source file.
-#
-# The current directory is added to the load-path.  This will ensure
-# that interdependent Emacs Lisp files are visible between themselves,
-# in case they require or load one another.
-
-elisp-compile() {
-	ebegin "Compiling GNU Emacs Elisp files"
-	${EMACS} ${EMACSFLAGS} ${BYTECOMPFLAGS} -f batch-byte-compile "$@"
-	eend $? "elisp-compile: batch-byte-compile failed"
-}
-
-elisp-comp() {
-	die "Function elisp-comp is not supported any more, see bug 235442"
-}
-
-# @FUNCTION: elisp-emacs-version
-# @DESCRIPTION:
-# Output version of currently active Emacs.
-
-elisp-emacs-version() {
-	# The following will work for at least versions 18-23.
-	echo "(princ emacs-version)" >"${T}"/emacs-version.el
-	${EMACS} ${EMACSFLAGS} -l "${T}"/emacs-version.el
-	rm -f "${T}"/emacs-version.el
-}
-
-# @FUNCTION: elisp-make-autoload-file
-# @USAGE: [output file] [list of directories]
-# @DESCRIPTION:
-# Generate a file with autoload definitions for the lisp functions.
-
-elisp-make-autoload-file() {
-	local f="${1:-${PN}-autoloads.el}"
-	shift
-	ebegin "Generating autoload file for GNU Emacs"
-
-	sed 's/^FF/\f/' >"${f}" <<-EOF
-	;;; ${f##*/} --- autoloads for ${P}
-
-	;;; Commentary:
-	;; Automatically generated by elisp-common.eclass
-	;; DO NOT EDIT THIS FILE
-
-	;;; Code:
-	FF
-	;; Local Variables:
-	;; version-control: never
-	;; no-byte-compile: t
-	;; no-update-autoloads: t
-	;; End:
-	;;; ${f##*/} ends here
-	EOF
-
-	${EMACS} ${EMACSFLAGS} \
-		--eval "(setq make-backup-files nil)" \
-		--eval "(setq generated-autoload-file (expand-file-name \"${f}\"))" \
-		-f batch-update-autoloads "${@-.}"
-
-	eend $? "elisp-make-autoload-file: batch-update-autoloads failed"
-}
-
-# @FUNCTION: elisp-install
-# @USAGE: <subdirectory> <list of files>
-# @DESCRIPTION:
-# Install files in SITELISP directory.
-
-elisp-install() {
-	local subdir="$1"
-	shift
-	ebegin "Installing Elisp files for GNU Emacs support"
-	( # subshell to avoid pollution of calling environment
-		insinto "${SITELISP}/${subdir}"
-		doins "$@"
-	)
-	eend $? "elisp-install: doins failed"
-}
-
-# @FUNCTION: elisp-site-file-install
-# @USAGE: <site-init file> [subdirectory]
-# @DESCRIPTION:
-# Install Emacs site-init file in SITELISP directory.  Automatically
-# inserts a standard comment header with the name of the package (unless
-# it is already present).  Tokens @SITELISP@ and @SITEETC@ are replaced
-# by the path to the package's subdirectory in SITELISP and SITEETC,
-# respectively.
-
-elisp-site-file-install() {
-	local sf="${1##*/}" my_pn="${2:-${PN}}" ret
-	local header=";;; ${PN} site-lisp configuration"
-
-	[[ ${sf} == [0-9][0-9]*-gentoo*.el ]] \
-		|| ewarn "elisp-site-file-install: bad name of site-init file"
-	sf="${T}/${sf/%-gentoo*.el/-gentoo.el}"
-	ebegin "Installing site initialisation file for GNU Emacs"
-	[[ $1 = ${sf} ]] || cp "$1" "${sf}"
-	sed -i -e "1{:x;/^\$/{n;bx;};/^;.*${PN}/I!s:^:${header}\n\n:;1s:^:\n:;}" \
-		-e "s:@SITELISP@:${SITELISP}/${my_pn}:g" \
-		-e "s:@SITEETC@:${SITEETC}/${my_pn}:g;\$q" "${sf}"
-	( # subshell to avoid pollution of calling environment
-		insinto "${SITELISP}/site-gentoo.d"
-		doins "${sf}"
-	)
-	ret=$?
-	rm -f "${sf}"
-	eend ${ret} "elisp-site-file-install: doins failed"
-}
-
-# @FUNCTION: elisp-site-regen
-# @DESCRIPTION:
-# Regenerate the site-gentoo.el file, based on packages' site
-# initialisation files in the /usr/share/emacs/site-lisp/site-gentoo.d/
-# directory.
-#
-# Note: Before December 2007, site initialisation files were installed
-# in /usr/share/emacs/site-lisp/.  For backwards compatibility, this
-# location is still supported when generating site-gentoo.el.
-
-elisp-site-regen() {
-	local i sf line obsolete
-	local -a sflist
-
-	if [ ! -d "${ROOT}${SITELISP}" ]; then
-		eerror "elisp-site-regen: Directory ${SITELISP} does not exist"
-		return 1
-	fi
-
-	if [ ! -d "${T}" ]; then
-		eerror "elisp-site-regen: Temporary directory ${T} does not exist"
-		return 1
-	fi
-
-	einfon "Regenerating site-gentoo.el for GNU Emacs (${EBUILD_PHASE}) ..."
-
-	# Until January 2009, elisp-common.eclass sometimes created an
-	# auxiliary file for backwards compatibility. Remove any such file.
-	rm -f "${ROOT}${SITELISP}"/00site-gentoo.el
-
-	# set nullglob option, there may be a directory without matching files
-	local old_shopts=$(shopt -p nullglob)
-	shopt -s nullglob
-
-	for sf in "${ROOT}${SITELISP}"/[0-9][0-9]*-gentoo.el \
-		"${ROOT}${SITELISP}"/site-gentoo.d/[0-9][0-9]*.el
-	do
-		[ -r "${sf}" ] || continue
-		# sort files by their basename. straight insertion sort.
-		for ((i=${#sflist[@]}; i>0; i--)); do
-			[[ ${sf##*/} < ${sflist[i-1]##*/} ]] || break
-			sflist[i]=${sflist[i-1]}
-		done
-		sflist[i]=${sf}
-		# set a flag if there are obsolete files
-		[ "${sf%/*}" = "${ROOT}${SITELISP}" ] && obsolete=t
-	done
-
-	eval "${old_shopts}"
-
-	cat <<-EOF >"${T}"/site-gentoo.el
-	;;; site-gentoo.el --- site initialisation for Gentoo-installed packages
-
-	;;; Commentary:
-	;; Automatically generated by elisp-common.eclass
-	;; DO NOT EDIT THIS FILE
-
-	;;; Code:
-	EOF
-	# Use sed instead of cat here, since files may miss a trailing newline.
-	sed '$q' "${sflist[@]}" </dev/null >>"${T}"/site-gentoo.el
-	cat <<-EOF >>"${T}"/site-gentoo.el
-
-	(provide 'site-gentoo)
-
-	;; Local Variables:
-	;; no-byte-compile: t
-	;; End:
-	;;; site-gentoo.el ends here
-	EOF
-
-	if cmp -s "${ROOT}${SITELISP}"/site-gentoo.el "${T}"/site-gentoo.el
-	then
-		# This prevents outputting unnecessary text when there
-		# was actually no change.
-		# A case is a remerge where we have doubled output.
-		echo " no changes."
-	else
-		mv "${T}"/site-gentoo.el "${ROOT}${SITELISP}"/site-gentoo.el
-		echo
-		einfo "... ${#sflist[@]} site initialisation file(s) included."
-	fi
-
-	if [ "${obsolete}" ]; then
-		echo
-		while read line; do ewarn "${line}"; done <<-EOF
-		Site-initialisation files of Emacs packages are now installed in
-		/usr/share/emacs/site-lisp/site-gentoo.d/. We strongly recommend
-		that you use app-admin/emacs-updater to rebuild the installed
-		Emacs packages.
-		EOF
-	fi
-
-	# cleanup
-	rm -f "${T}"/site-gentoo.el
-
-	return 0
-}