1#! /bin/sh
2# Update the local files from GNULIB.  Currently assumes that the current
3# GNULIB sources are in a directory parallel with this one.
4#
5# This program is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 2, or (at your option)
8# any later version.
9#
10# This program is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13# GNU General Public License for more details.
14#
15# You should have received a copy of the GNU General Public License
16# along with this program; if not, write to the Free Software Foundation,
17# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19if test -f maint-aux/gnulib-modules; then :; else
20  >&2 echo \
21"This script expects to be run from the top level of the CVS source tree."
22  exit 2
23fi
24
25if test -f maint-aux/gnulib-modules; then :; else
26  >&2 echo \
27"Failed to find the modules list (\`maint-aux/gnulib-modules')."
28  exit 2
29fi
30
31# Where to find the GNULIB sources.
32: ${GNULIB="../gnulib"}
33GNULIB_TOOL=$GNULIB/gnulib-tool
34
35# Which modules to update.
36MODULES=`cat maint-aux/gnulib-modules`
37
38# Are the GNULIB sources really where we expect them?
39if test -r $GNULIB && test -d $GNULIB \
40   && test -r $GNULIB_TOOL && test -f $GNULIB_TOOL; then :; else
41  echo GNULIB sources not found. >&2
42  exit 1
43fi
44
45trap \
46'status=$?
47# Restore lib/Makefile.am.
48if test -f lib/Makefile.am.save; then
49  mv lib/Makefile.am.save lib/Makefile.am
50fi
51# Restore m4/error.m4.
52if test -f m4/error.m4.save; then
53  mv m4/error.m4.save m4/error.m4
54fi
55exit $status' EXIT
56	
57# Prevent lib/Makefile.am from being overwritten.
58mv lib/Makefile.am lib/Makefile.am.save
59# Prevent m4/error.m4 from being overwritten unless necessary.
60mv m4/error.m4 m4/error.m4.save
61
62# Run the update.
63if $GNULIB_TOOL --import $MODULES >/dev/null; then :; else
64  exit $?
65fi
66
67# Correct this file for our purposes, but try to avoid munging timestamps
68# unless necessary.
69sed '/AC_FUNC_ERROR_AT_LINE/d' <m4/error.m4 >tmp
70if cmp tmp m4/error.m4.save >/dev/null 2>&1; then
71  mv m4/error.m4.save m4/error.m4
72  rm tmp
73else
74  mv tmp m4/error.m4
75  rm m4/error.m4.save
76fi
77
78# Extract the names of the files we imported.
79$GNULIB_TOOL --extract-filelist $MODULES |sort |uniq |sed '/^$/d' \
80	>maint-aux/gnulib-filelist.new
81
82# Warn the user if the filelist has changed.
83if cmp maint-aux/gnulib-filelist.txt maint-aux/gnulib-filelist.new >/dev/null
84then
85  # Avoid munging timestamps when nothing's changed.
86  rm maint-aux/gnulib-filelist.new
87else
88  cat >&2 <<\EOF
89********************************************************************
90The file list has changed.  You may need to add or remove files from
91CVS.  Use `cvs diff maint-aux/gnulib-filelist.txt' to view changes.
92********************************************************************
93EOF
94  # Save the file list for next time.
95  mv maint-aux/gnulib-filelist.new maint-aux/gnulib-filelist.txt
96fi
97
98
99# Warn the user if changes have been made to the Makefile.am.
100if cmp lib/Makefile.am lib/Makefile.gnulib >/dev/null; then
101  # Avoid munging timestamps when nothing's changed.
102  rm lib/Makefile.am
103else
104  cat >&2 <<\EOF
105********************************************************************
106Makefile.am needs updating. Use `cvs diff lib/Makefile.gnulib' to
107view changes.
108********************************************************************
109EOF
110  # Save the generated lib/Makefile.am for next time.
111  mv lib/Makefile.am lib/Makefile.gnulib
112fi
113