1#! /bin/sh
2#
3# SPDX-License-Identifier: BSD-2-Clause
4#
5# Copyright (c) 2018-2021 Gavin D. Howard and contributors.
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions are met:
9#
10# * Redistributions of source code must retain the above copyright notice, this
11#   list of conditions and the following disclaimer.
12#
13# * Redistributions in binary form must reproduce the above copyright notice,
14#   this list of conditions and the following disclaimer in the documentation
15#   and/or other materials provided with the distribution.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
21# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27# POSSIBILITY OF SUCH DAMAGE.
28#
29
30# Just print the usage and exit with an error.
31usage() {
32	if [ $# -eq 1 ]; then
33		printf '%s\n' "$1"
34	fi
35	printf "usage: %s [-l] NLSPATH main_exec [DESTDIR]\n" "$0" 1>&2
36	exit 1
37}
38
39# Run gencat on one file.
40# @param loc   The location of the resulting cat file.
41# @param file  The file to use as the source for the cat file.
42gencatfile() {
43
44	_gencatfile_loc="$1"
45	shift
46
47	_gencatfile_file="$1"
48	shift
49
50	mkdir -p $(dirname "$_gencatfile_loc")
51	gencat "$_gencatfile_loc" "$_gencatfile_file" > /dev/null 2>&1
52}
53
54# Return an exit code based on whether a locale exists.
55# @param locales  The list of locales.
56# @param locale   The locale to search for.
57# @param destdir  The DESTDIR that locales should be installed to.
58localeexists() {
59
60	_localeexists_locales="$1"
61	shift
62
63	_localeexists_locale="$1"
64	shift
65
66	_localeexists_destdir="$1"
67	shift
68
69	if [ "$_localeexists_destdir" != "" ]; then
70		_localeexists_char="@"
71		_localeexists_locale="${_localeexists_locale%%_localeexists_char*}"
72		_localeexists_char="."
73		_localeexists_locale="${_localeexists_locale##*$_localeexists_char}"
74	fi
75
76	test ! -z "${_localeexists_locales##*$_localeexists_locale*}"
77	return $?
78}
79
80# Split a path into its components. They will be separated by newlines, so paths
81# cannot have newlines in them.
82# @param path  The path to split.
83splitpath() {
84
85	_splitpath_path="$1"
86	shift
87
88	if [ "$_splitpath_path" = "${_splitpath_path#/}" ]; then
89		printf 'Must use absolute paths\n'
90		exit 1
91	fi
92
93	if [ "${_splitpath_path#\n*}" != "$_splitpath_path" ]; then
94		exit 1
95	fi
96
97	_splitpath_list=""
98	_splitpath_item=""
99
100	while [ "$_splitpath_path" != "/" ]; do
101		_splitpath_item=$(basename "$_splitpath_path")
102		_splitpath_list=$(printf '\n%s%s' "$_splitpath_item" "$_splitpath_list")
103		_splitpath_path=$(dirname "$_splitpath_path")
104	done
105
106	if [ "$_splitpath_list" != "/" ]; then
107		_splitpath_list="${_splitpath_list#?}"
108	fi
109
110	printf '%s' "$_splitpath_list"
111}
112
113# Generate a relative path from one path to another.
114# @param path1  The target path.
115# @param path2  The other path.
116relpath() {
117
118	_relpath_path1="$1"
119	shift
120
121	_relpath_path2="$1"
122	shift
123
124	# Very carefully set IFS in a portable way. No, you cannot do IFS=$'\n'.
125	_relpath_nl=$(printf '\nx')
126	_relpath_nl="${_relpath_nl%x}"
127
128	_relpath_splitpath1=`splitpath "$_relpath_path1"`
129	_relpath_splitpath2=`splitpath "$_relpath_path2"`
130
131	_relpath_path=""
132	_relpath_temp1="$_relpath_splitpath1"
133
134	IFS="$_relpath_nl"
135
136	# What this function does is find the parts that are the same and then
137	# calculates the difference based on how many folders up and down you must
138	# go.
139
140	# This first loop basically removes the parts that are the same between
141	# them.
142	for _relpath_part in $_relpath_temp1; do
143
144		_relpath_temp2="${_relpath_splitpath2#$_relpath_part$_relpath_nl}"
145
146		if [ "$_relpath_temp2" = "$_relpath_splitpath2" ]; then
147			break
148		fi
149
150		_relpath_splitpath2="$_relpath_temp2"
151		_relpath_splitpath1="${_relpath_splitpath1#$_relpath_part$_relpath_nl}"
152
153	done
154
155	# Go up the appropriate number of times.
156	for _relpath_part in $_relpath_splitpath2; do
157		_relpath_path="../$_relpath_path"
158	done
159
160	_relpath_path="${_relpath_path%../}"
161
162	# Go down the appropriate number of times.
163	for _relpath_part in $_relpath_splitpath1; do
164		_relpath_path="$_relpath_path$_relpath_part/"
165	done
166
167	_relpath_path="${_relpath_path%/}"
168
169	unset IFS
170
171	printf '%s\n' "$_relpath_path"
172}
173
174script="$0"
175scriptdir=$(dirname "$script")
176
177. "$scriptdir/functions.sh"
178
179# Set a default.
180all_locales=0
181
182# Process command-line args.
183while getopts "l" opt; do
184
185	case "$opt" in
186		l) all_locales=1 ; shift ;;
187		?) usage "Invalid option: $opt" ;;
188	esac
189
190done
191
192test "$#" -ge 2 || usage
193
194nlspath="$1"
195shift
196
197main_exec="$1"
198shift
199
200if [ "$#" -ge 1 ]; then
201	destdir="$1"
202	shift
203else
204	destdir=""
205fi
206
207# Uninstall locales first.
208"$scriptdir/locale_uninstall.sh" "$nlspath" "$main_exec" "$destdir"
209
210locales_dir="$scriptdir/../locales"
211
212# What this does is if installing to a package, it installs all locales that
213# match supported charsets instead of installing all directly supported locales.
214if [ "$destdir" = "" ]; then
215	locales=$(locale -a)
216else
217	locales=$(locale -m)
218fi
219
220# For each relevant .msg file, run gencat.
221for file in $locales_dir/*.msg; do
222
223	locale=$(basename "$file" ".msg")
224
225	# If we are not installing all locales, there's a possibility we need to
226	# skip this one.
227	if [ "$all_locales" -eq 0 ]; then
228
229		# Check if the locale exists and if not skip.
230		localeexists "$locales" "$locale" "$destdir"
231		err="$?"
232
233		if [ "$err" -eq 0 ]; then
234			continue
235		fi
236	fi
237
238	# We skip the symlinks for now.
239	if [ -L "$file" ]; then
240		continue
241	fi
242
243	# Generate the proper location for the cat file.
244	loc=$(gen_nlspath "$destdir/$nlspath" "$locale" "$main_exec")
245
246	gencatfile "$loc" "$file"
247
248done
249
250# Now that we have done the non-symlinks, it's time to do the symlinks. Think
251# that this second loop is unnecessary and that you can combine the two? Well,
252# make sure that when you figure out you are wrong that you add to this comment
253# with your story. Fortunately for me, I learned fast.
254for file in $locales_dir/*.msg; do
255
256	locale=$(basename "$file" ".msg")
257
258	# Do the same skip as the above loop.
259	if [ "$all_locales" -eq 0 ]; then
260
261		localeexists "$locales" "$locale" "$destdir"
262		err="$?"
263
264		if [ "$err" -eq 0 ]; then
265			continue
266		fi
267	fi
268
269	# Generate the proper location for the cat file.
270	loc=$(gen_nlspath "$destdir/$nlspath" "$locale" "$main_exec")
271
272	# Make sure the directory exists.
273	mkdir -p $(dirname "$loc")
274
275	# Make sure to skip non-symlinks; they are already done.
276	if [ -L "$file" ]; then
277
278		# This song and dance is because we want to generate relative symlinks.
279		# They take less space, but also, they are more resilient to being
280		# moved.
281		link=$(readlink "$file")
282		linkdir=$(dirname "$file")
283		locale=$(basename "$link" .msg)
284		linksrc=$(gen_nlspath "$nlspath" "$locale" "$main_exec")
285		relloc="${loc##$destdir/}"
286		rel=$(relpath "$linksrc" "$relloc")
287
288		# If the target file doesn't exist (because it's for a locale that is
289		# not installed), generate it anyway. It's easier this way.
290		if [ ! -f "$destdir/$linksrc" ]; then
291			gencatfile "$destdir/$linksrc" "$linkdir/$link"
292		fi
293
294		# Finally, symlink to the install of the generated cat file that
295		# corresponds to the correct msg file.
296		ln -fs "$rel" "$loc"
297	fi
298
299done
300