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      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 
     19 if 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
     23 fi
     24 
     25 if 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
     29 fi
     30 
     31 # Where to find the GNULIB sources.
     32 : ${GNULIB="../gnulib"}
     33 GNULIB_TOOL=$GNULIB/gnulib-tool
     34 
     35 # Which modules to update.
     36 MODULES=`cat maint-aux/gnulib-modules`
     37 
     38 # Are the GNULIB sources really where we expect them?
     39 if test -r $GNULIB && test -d $GNULIB \
     40    && test -r $GNULIB_TOOL && test -f $GNULIB_TOOL; then :; else
     41   echo GNULIB sources not found. >&2
     42   exit 1
     43 fi
     44 
     45 trap \
     46 'status=$?
     47 # Restore lib/Makefile.am.
     48 if test -f lib/Makefile.am.save; then
     49   mv lib/Makefile.am.save lib/Makefile.am
     50 fi
     51 # Restore m4/error.m4.
     52 if test -f m4/error.m4.save; then
     53   mv m4/error.m4.save m4/error.m4
     54 fi
     55 exit $status' EXIT
     56 	
     57 # Prevent lib/Makefile.am from being overwritten.
     58 mv lib/Makefile.am lib/Makefile.am.save
     59 # Prevent m4/error.m4 from being overwritten unless necessary.
     60 mv m4/error.m4 m4/error.m4.save
     61 
     62 # Run the update.
     63 if $GNULIB_TOOL --import $MODULES >/dev/null; then :; else
     64   exit $?
     65 fi
     66 
     67 # Correct this file for our purposes, but try to avoid munging timestamps
     68 # unless necessary.
     69 sed '/AC_FUNC_ERROR_AT_LINE/d' <m4/error.m4 >tmp
     70 if cmp tmp m4/error.m4.save >/dev/null 2>&1; then
     71   mv m4/error.m4.save m4/error.m4
     72   rm tmp
     73 else
     74   mv tmp m4/error.m4
     75   rm m4/error.m4.save
     76 fi
     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.
     83 if cmp maint-aux/gnulib-filelist.txt maint-aux/gnulib-filelist.new >/dev/null
     84 then
     85   # Avoid munging timestamps when nothing's changed.
     86   rm maint-aux/gnulib-filelist.new
     87 else
     88   cat >&2 <<\EOF
     89 ********************************************************************
     90 The file list has changed.  You may need to add or remove files from
     91 CVS.  Use `cvs diff maint-aux/gnulib-filelist.txt' to view changes.
     92 ********************************************************************
     93 EOF
     94   # Save the file list for next time.
     95   mv maint-aux/gnulib-filelist.new maint-aux/gnulib-filelist.txt
     96 fi
     97 
     98 
     99 # Warn the user if changes have been made to the Makefile.am.
    100 if cmp lib/Makefile.am lib/Makefile.gnulib >/dev/null; then
    101   # Avoid munging timestamps when nothing's changed.
    102   rm lib/Makefile.am
    103 else
    104   cat >&2 <<\EOF
    105 ********************************************************************
    106 Makefile.am needs updating. Use `cvs diff lib/Makefile.gnulib' to
    107 view changes.
    108 ********************************************************************
    109 EOF
    110   # Save the generated lib/Makefile.am for next time.
    111   mv lib/Makefile.am lib/Makefile.gnulib
    112 fi
    113