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#! /bin/sh
# Common stub for a few missing GNU programs while installing.
# Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
# Originally by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

if test $# -eq 0; then
  echo 1>&2 "Try \`$0 --help' for more information"
  exit 1
fi

run=:

case "$1" in
--run)
  # Try to run requested program, and just exit if it succeeds.
  run=
  shift
  "$@" && exit 0
  ;;
esac

# If it does not exist, or fails to run (possibly an outdated version),
# try to emulate it.
case "$1" in

  -h|--h|--he|--hel|--help)
    echo "\
$0 [OPTION]... PROGRAM [ARGUMENT]...

Handle \`PROGRAM [ARGUMENT]...' for when PROGRAM is missing, or return an
error status if there is no known handling for PROGRAM.

Options:
  -h, --help      display this help and exit
  -v, --version   output version information and exit
  --run           try to run the given command, and emulate it if it fails

Supported PROGRAM values:
  aclocal      touch file \`aclocal.m4'
  autoconf     touch file \`configure'
  autoheader   touch file \`config.h.in'
  automake     touch all \`Makefile.in' files
  bison        create \`y.tab.[ch]', if possible, from existing .[ch]
  flex         create \`lex.yy.c', if possible, from existing .c
  lex          create \`lex.yy.c', if possible, from existing .c
  makeinfo     touch the output file
  tar          try tar, gnutar, gtar, then tar without non-portable flags
  yacc         create \`y.tab.[ch]', if possible, from existing .[ch]"
    ;;

  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
    echo "missing 0.2 - GNU automake"
    ;;

  -*)
    echo 1>&2 "$0: Unknown \`$1' option"
    echo 1>&2 "Try \`$0 --help' for more information"
    exit 1
    ;;

  aclocal)
    echo 1>&2 "\
WARNING: \`$1' is missing on your system.  You should only need it if
         you modified \`acinclude.m4' or \`configure.in'.  You might want
         to install the \`Automake' and \`Perl' packages.  Grab them from
         any GNU archive site."
    touch aclocal.m4
    ;;

  autoconf)
    echo 1>&2 "\
WARNING: \`$1' is missing on your system.  You should only need it if
         you modified \`configure.in'.  You might want to install the
         \`Autoconf' and \`GNU m4' packages.  Grab them from any GNU
         archive site."
    touch configure
    ;;

  autoheader)
    echo 1>&2 "\
WARNING: \`$1' is missing on your system.  You should only need it if
         you modified \`acconfig.h' or \`configure.in'.  You might want
         to install the \`Autoconf' and \`GNU m4' packages.  Grab them
         from any GNU archive site."
    files=`sed -n 's/^[ ]*A[CM]_CONFIG_HEADER(\([^)]*\)).*/\1/p' configure.in`
    test -z "$files" && files="config.h"
    touch_files=
    for f in $files; do
      case "$f" in
      *:*) touch_files="$touch_files "`echo "$f" |
                                       sed -e 's/^[^:]*://' -e 's/:.*//'`;;
      *) touch_files="$touch_files $f.in";;
      esac
    done
    touch $touch_files
    ;;

  automake)
    echo 1>&2 "\
WARNING: \`$1' is missing on your system.  You should only need it if
         you modified \`Makefile.am', \`acinclude.m4' or \`configure.in'.
         You might want to install the \`Automake' and \`Perl' packages.
         Grab them from any GNU archive site."
    find . -type f -name Makefile.am -print |
           sed 's/\.am$/.in/' |
           while read f; do touch "$f"; done
    ;;

  bison|yacc)
    echo 1>&2 "\
WARNING: \`$1' is missing on your system.  You should only need it if
         you modified a \`.y' file.  You may need the \`Bison' package
         in order for those modifications to take effect.  You can get
         \`Bison' from any GNU archive site."
    rm -f y.tab.c y.tab.h
    if [ $# -ne 1 ]; then
        eval LASTARG="\${$#}"
        case "$LASTARG" in
        *.y)
            SRCFILE=`echo "$LASTARG" | sed 's/y$/c/'`
            if [ -f "$SRCFILE" ]; then
                 cp "$SRCFILE" y.tab.c
            fi
            SRCFILE=`echo "$LASTARG" | sed 's/y$/h/'`
            if [ -f "$SRCFILE" ]; then
                 cp "$SRCFILE" y.tab.h
            fi
          ;;
        esac
    fi
    if [ ! -f y.tab.h ]; then
        echo >y.tab.h
    fi
    if [ ! -f y.tab.c ]; then
        echo 'main() { return 0; }' >y.tab.c
    fi
    ;;

  lex|flex)
    echo 1>&2 "\
WARNING: \`$1' is missing on your system.  You should only need it if
         you modified a \`.l' file.  You may need the \`Flex' package
         in order for those modifications to take effect.  You can get
         \`Flex' from any GNU archive site."
    rm -f lex.yy.c
    if [ $# -ne 1 ]; then
        eval LASTARG="\${$#}"
        case "$LASTARG" in
        *.l)
            SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'`
            if [ -f "$SRCFILE" ]; then
                 cp "$SRCFILE" lex.yy.c
            fi
          ;;
        esac
    fi
    if [ ! -f lex.yy.c ]; then
        echo 'main() { return 0; }' >lex.yy.c
    fi
    ;;

  makeinfo)
    echo 1>&2 "\
WARNING: \`$1' is missing on your system.  You should only need it if
         you modified a \`.texi' or \`.texinfo' file, or any other file
         indirectly affecting the aspect of the manual.  The spurious
         call might also be the consequence of using a buggy \`make' (AIX,
         DU, IRIX).  You might want to install the \`Texinfo' package or
         the \`GNU make' package.  Grab either from any GNU archive site."
    file=`echo "$*" | sed -n 's/.*-o \([^ ]*\).*/\1/p'`
    if test -z "$file"; then
      file=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'`
      file=`sed -n '/^@setfilename/ { s/.* \([^ ]*\) *$/\1/; p; q; }' $file`
    fi
    touch $file
    ;;

  tar)
    shift
    if test -n "$run"; then
      echo 1>&2 "ERROR: \`tar' requires --run"
      exit 1
    fi

    # We have already tried tar in the generic part.
    # Look for gnutar/gtar before invocation to avoid ugly error
    # messages.
    if (gnutar --version > /dev/null 2>&1); then
       gnutar ${1+"$@"} && exit 0
    fi
    if (gtar --version > /dev/null 2>&1); then
       gtar ${1+"$@"} && exit 0
    fi
    firstarg="$1"
    if shift; then
        case "$firstarg" in
        *o*)
            firstarg=`echo "$firstarg" | sed s/o//`
            tar "$firstarg" ${1+"$@"} && exit 0
            ;;
        esac
        case "$firstarg" in
        *h*)
            firstarg=`echo "$firstarg" | sed s/h//`
            tar "$firstarg" ${1+"$@"} && exit 0
            ;;
        esac
    fi

    echo 1>&2 "\
WARNING: I can't seem to be able to run \`tar' with the given arguments.
         You may want to install GNU tar or Free paxutils, or check the
         command line arguments."
    exit 1
    ;;

  *)
    echo 1>&2 "\
WARNING: \`$1' is needed, and you do not seem to have it handy on your
         system.  You might have modified some files without having the
         proper tools for further handling them.  Check the \`README' file,
         it often tells you about the needed prerequirements for installing
         this package.  You may also peek at any GNU archive site, in case
         some other package would contain this missing \`$1' program."
    exit 1
    ;;
esac

exit 0