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1# Copyright 1999-2004 Gentoo Foundation 1# Copyright 1999-2013 Gentoo Foundation
2# Distributed under the terms of the GNU General Public License v2 2# Distributed under the terms of the GNU General Public License v2
3# $Header: /var/cvsroot/gentoo-x86/eclass/elisp-common.eclass,v 1.10 2005/05/03 09:20:13 usata Exp $ 3# $Header: /var/cvsroot/gentoo-x86/eclass/elisp-common.eclass,v 1.83 2013/01/04 21:22:43 ulm Exp $
4# 4#
5# @ECLASS: elisp-common.eclass
6# @MAINTAINER:
7# Gentoo Emacs team <emacs@gentoo.org>
8# @AUTHOR:
5# Copyright 2002-2003 Matthew Kennedy <mkennedy@gentoo.org> 9# Matthew Kennedy <mkennedy@gentoo.org>
6# Copyright 2003 Jeremy Maitin-Shepard <jbms@attbi.com> 10# Jeremy Maitin-Shepard <jbms@attbi.com>
11# Mamoru Komachi <usata@gentoo.org>
12# Christian Faulhammer <fauli@gentoo.org>
13# Ulrich Müller <ulm@gentoo.org>
14# @BLURB: Emacs-related installation utilities
15# @DESCRIPTION:
7# 16#
8# This is not an eclass, but it does provide emacs-related 17# Usually you want to use this eclass for (optional) GNU Emacs support
9# installation utilities. 18# of your package. This is NOT for XEmacs!
19#
20# Many of the steps here are sometimes done by the build system of your
21# package (especially compilation), so this is mainly for standalone
22# elisp files you gathered from somewhere else.
23#
24# When relying on the emacs USE flag, you need to add
25#
26# emacs? ( virtual/emacs )
27#
28# to your DEPEND/RDEPEND line and use the functions provided here to
29# bring the files to the correct locations.
30#
31# If your package requires a minimum Emacs version, e.g. Emacs 23, then
32# the dependency should be on >=virtual/emacs-23 instead. Because the
33# user can select the Emacs executable with eselect, you should also
34# make sure that the active Emacs version is sufficient. This can be
35# tested with function elisp-need-emacs(), which would typically be
36# called from pkg_setup(), as in the following example:
37#
38# elisp-need-emacs 23 || die "Emacs version too low"
39#
40# Please note that such tests should be limited to packages that are
41# known to fail with lower Emacs versions; the standard case is to
42# depend on virtual/emacs without version.
43#
44# @ROFF .SS
45# src_compile() usage:
46#
47# An elisp file is compiled by the elisp-compile() function defined
48# here and simply takes the source files as arguments. The case of
49# interdependent elisp files is also supported, since the current
50# directory is added to the load-path which makes sure that all files
51# are loadable.
52#
53# elisp-compile *.el || die
54#
55# Function elisp-make-autoload-file() can be used to generate a file
56# with autoload definitions for the lisp functions. It takes the output
57# file name (default: "${PN}-autoloads.el") and a list of directories
58# (default: working directory) as its arguments. Use of this function
59# requires that the elisp source files contain magic ";;;###autoload"
60# comments. See the Emacs Lisp Reference Manual (node "Autoload") for
61# a detailed explanation.
62#
63# @ROFF .SS
64# src_install() usage:
65#
66# The resulting compiled files (.elc) should be put in a subdirectory of
67# /usr/share/emacs/site-lisp/ which is named after the first argument
68# of elisp-install(). The following parameters are the files to be put
69# in that directory. Usually the subdirectory should be ${PN}, you can
70# choose something else, but remember to tell elisp-site-file-install()
71# (see below) the change, as it defaults to ${PN}.
72#
73# elisp-install ${PN} *.el *.elc || die
74#
75# To let the Emacs support be activated by Emacs on startup, you need
76# to provide a site file (shipped in ${FILESDIR}) which contains the
77# startup code (have a look in the documentation of your software).
78# Normally this would look like this:
79#
80# (add-to-list 'load-path "@SITELISP@")
81# (add-to-list 'auto-mode-alist '("\\.csv\\'" . csv-mode))
82# (autoload 'csv-mode "csv-mode" "Major mode for csv files." t)
83#
84# If your Emacs support files are installed in a subdirectory of
85# /usr/share/emacs/site-lisp/ (which is strongly recommended), you need
86# to extend Emacs' load-path as shown in the first non-comment line.
87# The elisp-site-file-install() function of this eclass will replace
88# "@SITELISP@" and "@SITEETC@" by the actual paths.
89#
90# The next line tells Emacs to load the mode opening a file ending
91# with ".csv" and load functions depending on the context and needed
92# features. Be careful though. Commands as "load-library" or "require"
93# bloat the editor as they are loaded on every startup. When having
94# many Emacs support files, users may be annoyed by the start-up time.
95# Also avoid keybindings as they might interfere with the user's
96# settings. Give a hint in pkg_postinst(), which should be enough.
97# The guiding principle is that emerging your package should not by
98# itself cause a change of standard Emacs behaviour.
99#
100# The naming scheme for this site-init file matches the shell pattern
101# "[1-8][0-9]*-gentoo*.el", where the two digits at the beginning define
102# the loading order (numbers below 10 or above 89 are reserved for
103# internal use). So if your initialisation depends on another Emacs
104# package, your site file's number must be higher! If there are no such
105# interdependencies then the number should be 50. Otherwise, numbers
106# divisible by 10 are preferred.
107#
108# Best practice is to define a SITEFILE variable in the global scope of
109# your ebuild (e.g., right after S or RDEPEND):
110#
111# SITEFILE="50${PN}-gentoo.el"
112#
113# Which is then installed by
114#
115# elisp-site-file-install "${FILESDIR}/${SITEFILE}" || die
116#
117# in src_install(). Any characters after the "-gentoo" part and before
118# the extension will be stripped from the destination file's name.
119# For example, a file "50${PN}-gentoo-${PV}.el" will be installed as
120# "50${PN}-gentoo.el". If your subdirectory is not named ${PN}, give
121# the differing name as second argument.
122#
123# @ROFF .SS
124# pkg_postinst() / pkg_postrm() usage:
125#
126# After that you need to recreate the start-up file of Emacs after
127# emerging and unmerging by using
128#
129# pkg_postinst() {
130# elisp-site-regen
131# }
132#
133# pkg_postrm() {
134# elisp-site-regen
135# }
136#
137# When having optional Emacs support, you should prepend "use emacs &&"
138# to above calls of elisp-site-regen().
139# Don't use "has_version virtual/emacs"! When unmerging the state of
140# the emacs USE flag is taken from the package database and not from the
141# environment, so it is no problem when you unset USE=emacs between
142# merge and unmerge of a package.
10 143
11ECLASS=elisp-common 144# @ECLASS-VARIABLE: SITELISP
12INHERITED="$INHERITED $ECLASS" 145# @DESCRIPTION:
13 146# Directory where packages install Emacs Lisp files.
14SITELISP=/usr/share/emacs/site-lisp 147SITELISP=/usr/share/emacs/site-lisp
15 148
149# @ECLASS-VARIABLE: SITEETC
150# @DESCRIPTION:
151# Directory where packages install miscellaneous (not Lisp) files.
152SITEETC=/usr/share/emacs/etc
153
154# @ECLASS-VARIABLE: EMACS
155# @DESCRIPTION:
156# Path of Emacs executable.
157EMACS=${EPREFIX}/usr/bin/emacs
158
159# @ECLASS-VARIABLE: EMACSFLAGS
160# @DESCRIPTION:
161# Flags for executing Emacs in batch mode.
162# These work for Emacs versions 18-24, so don't change them.
163EMACSFLAGS="-batch -q --no-site-file"
164
165# @ECLASS-VARIABLE: BYTECOMPFLAGS
166# @DESCRIPTION:
167# Emacs flags used for byte-compilation in elisp-compile().
168BYTECOMPFLAGS="-L ."
169
170# @FUNCTION: elisp-emacs-version
171# @DESCRIPTION:
172# Output version of currently active Emacs.
173
174elisp-emacs-version() {
175 local ret
176 # The following will work for at least versions 18-24.
177 echo "(princ emacs-version)" >"${T}"/emacs-version.el
178 ${EMACS} ${EMACSFLAGS} -l "${T}"/emacs-version.el
179 ret=$?
180 rm -f "${T}"/emacs-version.el
181 if [[ ${ret} -ne 0 ]]; then
182 eerror "elisp-emacs-version: Failed to run ${EMACS}"
183 fi
184 return ${ret}
185}
186
187# @FUNCTION: elisp-need-emacs
188# @USAGE: <version>
189# @RETURN: 0 if true, 1 if false, 2 if trouble
190# @DESCRIPTION:
191# Test if the eselected Emacs version is at least the major version
192# of GNU Emacs specified as argument.
193
194elisp-need-emacs() {
195 local need_emacs=$1 have_emacs
196 have_emacs=$(elisp-emacs-version) || return 2
197 einfo "Emacs version: ${have_emacs}"
198 if [[ ${have_emacs} =~ XEmacs|Lucid ]]; then
199 eerror "This package needs GNU Emacs."
200 return 1
201 fi
202 if ! [[ ${have_emacs%%.*} -ge ${need_emacs%%.*} ]]; then
203 eerror "This package needs at least Emacs ${need_emacs%%.*}."
204 eerror "Use \"eselect emacs\" to select the active version."
205 return 1
206 fi
207 return 0
208}
209
210# @FUNCTION: elisp-compile
211# @USAGE: <list of elisp files>
212# @DESCRIPTION:
213# Byte-compile Emacs Lisp files.
214#
215# This function uses GNU Emacs to byte-compile all ".el" specified by
216# its arguments. The resulting byte-code (".elc") files are placed in
217# the same directory as their corresponding source file.
218#
219# The current directory is added to the load-path. This will ensure
220# that interdependent Emacs Lisp files are visible between themselves,
221# in case they require or load one another.
222
16elisp-compile() { 223elisp-compile() {
17 /usr/bin/emacs --batch -f batch-byte-compile --no-site-file --no-init-file $* 224 ebegin "Compiling GNU Emacs Elisp files"
225 ${EMACS} ${EMACSFLAGS} ${BYTECOMPFLAGS} -f batch-byte-compile "$@"
226 eend $? "elisp-compile: batch-byte-compile failed"
18} 227}
228
229# @FUNCTION: elisp-make-autoload-file
230# @USAGE: [output file] [list of directories]
231# @DESCRIPTION:
232# Generate a file with autoload definitions for the lisp functions.
233
234elisp-make-autoload-file() {
235 local f="${1:-${PN}-autoloads.el}" null="" page=$'\f'
236 shift
237 ebegin "Generating autoload file for GNU Emacs"
238
239 cat >"${f}" <<-EOF
240 ;;; ${f##*/} --- autoloads for ${PN}
241
242 ;;; Commentary:
243 ;; Automatically generated by elisp-common.eclass
244 ;; DO NOT EDIT THIS FILE
245
246 ;;; Code:
247 ${page}
248 ;; Local ${null}Variables:
249 ;; version-control: never
250 ;; no-byte-compile: t
251 ;; no-update-autoloads: t
252 ;; End:
253
254 ;;; ${f##*/} ends here
255 EOF
256
257 ${EMACS} ${EMACSFLAGS} \
258 --eval "(setq make-backup-files nil)" \
259 --eval "(setq generated-autoload-file (expand-file-name \"${f}\"))" \
260 -f batch-update-autoloads "${@-.}"
261
262 eend $? "elisp-make-autoload-file: batch-update-autoloads failed"
263}
264
265# @FUNCTION: elisp-install
266# @USAGE: <subdirectory> <list of files>
267# @DESCRIPTION:
268# Install files in SITELISP directory.
19 269
20elisp-install() { 270elisp-install() {
21 local subdir=$1 271 local subdir="$1"
22 dodir ${SITELISP}/${subdir}
23 insinto ${SITELISP}/${subdir}
24 shift 272 shift
273 ebegin "Installing Elisp files for GNU Emacs support"
274 ( # subshell to avoid pollution of calling environment
275 insinto "${SITELISP}/${subdir}"
25 doins $@ 276 doins "$@"
277 )
278 eend $? "elisp-install: doins failed"
26} 279}
280
281# @FUNCTION: elisp-site-file-install
282# @USAGE: <site-init file> [subdirectory]
283# @DESCRIPTION:
284# Install Emacs site-init file in SITELISP directory. Automatically
285# inserts a standard comment header with the name of the package (unless
286# it is already present). Tokens @SITELISP@ and @SITEETC@ are replaced
287# by the path to the package's subdirectory in SITELISP and SITEETC,
288# respectively.
27 289
28elisp-site-file-install() { 290elisp-site-file-install() {
29 local sitefile=$1 my_pn=${2:-${PN}} 291 local sf="${1##*/}" my_pn="${2:-${PN}}" ret
30 pushd ${S} 292 local header=";;; ${PN} site-lisp configuration"
31 cp ${sitefile} ${T} 293
32 sed -i "s:@SITELISP@:${SITELISP}/${my_pn}:g" ${T}/$(basename ${sitefile}) 294 [[ ${sf} == [0-9][0-9]*-gentoo*.el ]] \
33 insinto ${SITELISP} 295 || ewarn "elisp-site-file-install: bad name of site-init file"
34 doins ${T}/$(basename ${sitefile}) || die "failed to install site file" 296 sf="${T}/${sf/%-gentoo*.el/-gentoo.el}"
35 popd 297 ebegin "Installing site initialisation file for GNU Emacs"
298 [[ $1 = "${sf}" ]] || cp "$1" "${sf}"
299 sed -i -e "1{:x;/^\$/{n;bx;};/^;.*${PN}/I!s:^:${header}\n\n:;1s:^:\n:;}" \
300 -e "s:@SITELISP@:${EPREFIX}${SITELISP}/${my_pn}:g" \
301 -e "s:@SITEETC@:${EPREFIX}${SITEETC}/${my_pn}:g;\$q" "${sf}"
302 ( # subshell to avoid pollution of calling environment
303 insinto "${SITELISP}/site-gentoo.d"
304 doins "${sf}"
305 )
306 ret=$?
307 rm -f "${sf}"
308 eend ${ret} "elisp-site-file-install: doins failed"
36} 309}
310
311# @FUNCTION: elisp-site-regen
312# @DESCRIPTION:
313# Regenerate the site-gentoo.el file, based on packages' site
314# initialisation files in the /usr/share/emacs/site-lisp/site-gentoo.d/
315# directory.
316#
317# Note: Before December 2007, site initialisation files were installed
318# in /usr/share/emacs/site-lisp/. For backwards compatibility, this
319# location is still supported when generating site-gentoo.el.
37 320
38elisp-site-regen() { 321elisp-site-regen() {
39 einfo "Regenerating ${SITELISP}/site-gentoo.el ..." 322 local sitelisp=${ROOT}${EPREFIX}${SITELISP}
40 einfo "" 323 local sf i null="" page=$'\f'
41 cat <<EOF >${SITELISP}/site-gentoo.el 324 local -a sflist
42;;; DO NOT EDIT THIS FILE -- IT IS GENERATED AUTOMATICALLY BY PORTAGE
43;;; -----------------------------------------------------------------
44 325
45EOF 326 if [[ ! -d ${sitelisp} ]]; then
46 ls ${SITELISP}/[0-9][0-9]*-gentoo.el |sort -n | \ 327 eerror "elisp-site-regen: Directory ${sitelisp} does not exist"
47 while read sf 328 return 1
329 fi
330
331 if [[ ! -d ${T} ]]; then
332 eerror "elisp-site-regen: Temporary directory ${T} does not exist"
333 return 1
334 fi
335
336 ebegin "Regenerating site-gentoo.el for GNU Emacs (${EBUILD_PHASE})"
337
338 for sf in "${sitelisp}"/[0-9][0-9]*-gentoo.el \
339 "${sitelisp}"/site-gentoo.d/[0-9][0-9]*.el
48 do 340 do
49 einfo " Adding $(basename $sf) ..." 341 [[ -r ${sf} ]] || continue
50 # Great for debugging, too noisy and slow for users though 342 # sort files by their basename. straight insertion sort.
51# echo "(message \"Loading $sf ...\")" >>${SITELISP}/site-start.el 343 for ((i=${#sflist[@]}; i>0; i--)); do
52 cat $sf >>${SITELISP}/site-gentoo.el 344 [[ ${sf##*/} < ${sflist[i-1]##*/} ]] || break
345 sflist[i]=${sflist[i-1]}
346 done
347 sflist[i]=${sf}
53 done 348 done
54 while read line; do einfo "${line}"; done <<EOF
55 349
56All site initialization for Gentoo-installed packages is now added to 350 cat <<-EOF >"${T}"/site-gentoo.el
57/usr/share/emacs/site-lisp/site-gentoo.el; site-start.el is no longer 351 ;;; site-gentoo.el --- site initialisation for Gentoo-installed packages
58managed by Gentoo. You are responsible for all maintenance of
59site-start.el if there is such a file.
60 352
61In order for this site initialization to be loaded for all users 353 ;;; Commentary:
62automatically, as was done previously, you can add a line like this: 354 ;; Automatically generated by elisp-common.eclass
355 ;; DO NOT EDIT THIS FILE
63 356
64 (load "/usr/share/emacs/site-lisp/site-gentoo") 357 ;;; Code:
65
66to /usr/share/emacs/site-lisp/site-start.el. Alternatively, that line
67can be added by individual users to their initialization files, or for
68greater flexibility, users can select which of the package-specific
69initialization files in /usr/share/emacs/site-lisp to load.
70EOF 358 EOF
71 echo 359 # Use sed instead of cat here, since files may miss a trailing newline.
72} 360 sed '$q' "${sflist[@]}" </dev/null >>"${T}"/site-gentoo.el
361 cat <<-EOF >>"${T}"/site-gentoo.el
73 362
74# The following Emacs Lisp compilation routine is taken from GNU 363 ${page}
75# autotools. 364 (provide 'site-gentoo)
76 365
77elisp-comp() { 366 ;; Local ${null}Variables:
78# Copyright 1995 Free Software Foundation, Inc. 367 ;; no-byte-compile: t
79# François Pinard <pinard@iro.umontreal.ca>, 1995. 368 ;; buffer-read-only: t
80# 369 ;; End:
81# This program is free software; you can redistribute it and/or modify
82# it under the terms of the GNU General Public License as published by
83# the Free Software Foundation; either version 2, or (at your option)
84# any later version.
85#
86# This program is distributed in the hope that it will be useful,
87# but WITHOUT ANY WARRANTY; without even the implied warranty of
88# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
89# GNU General Public License for more details.
90#
91# You should have received a copy of the GNU General Public License
92# along with this program; if not, write to the Free Software
93# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
94 370
95# As a special exception to the GNU General Public License, if you 371 ;;; site-gentoo.el ends here
96# distribute this file as part of a program that contains a 372 EOF
97# configuration script generated by Autoconf, you may include it under
98# the same distribution terms that you use for the rest of that program.
99 373
100# This script byte-compiles all `.el' files which are part of its 374 if cmp -s "${sitelisp}"/site-gentoo.el "${T}"/site-gentoo.el; then
101# arguments, using GNU Emacs, and put the resulting `.elc' files into 375 # This prevents outputting unnecessary text when there
102# the current directory, so disregarding the original directories used 376 # was actually no change.
103# in `.el' arguments. 377 # A case is a remerge where we have doubled output.
104# 378 rm -f "${T}"/site-gentoo.el
105# This script manages in such a way that all Emacs LISP files to 379 eend
106# be compiled are made visible between themselves, in the event 380 einfo "... no changes."
107# they require or load-library one another.
108
109 if test $# = 0; then
110 echo 1>&2 "No files given to $0"
111 exit 1
112 else 381 else
113 if test -z "$EMACS" || test "$EMACS" = "t"; then 382 mv "${T}"/site-gentoo.el "${sitelisp}"/site-gentoo.el
114 # Value of "t" means we are running in a shell under Emacs. 383 eend
115 # Just assume Emacs is called "emacs". 384 case ${#sflist[@]} in
116 EMACS=emacs 385 0) [[ ${PN} = emacs-common-gentoo ]] \
386 || ewarn "... Huh? No site initialisation files found." ;;
387 1) einfo "... ${#sflist[@]} site initialisation file included." ;;
388 *) einfo "... ${#sflist[@]} site initialisation files included." ;;
389 esac
117 fi 390 fi
118 391
119 tempdir=elc.$$ 392 return 0
120 mkdir $tempdir
121 cp $* $tempdir
122 cd $tempdir
123
124 echo "(add-to-list 'load-path \"../\")" > script
125 $EMACS -batch -q --no-site-file --no-init-file -l script -f batch-byte-compile *.el
126 mv *.elc ..
127
128 cd ..
129 rm -fr $tempdir
130 fi
131} 393}
132
133# Local Variables: ***
134# mode: shell-script ***
135# tab-width: 4 ***
136# indent-tabs-mode: t ***
137# End: ***
138

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