external/gpl2/xcvs/dist/maint-aux/gnulib-update

   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