1  #! /bin/sh
  2  # ylwrap - wrapper for lex/yacc invocations.
  3  
  4  scriptversion=2009-04-28.21; # UTC
  5  
  6  # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005,
  7  # 2007, 2009 Free Software Foundation, Inc.
  8  #
  9  # Written by Tom Tromey <tromey@cygnus.com>.
 10  #
 11  # This program is free software; you can redistribute it and/or modify
 12  # it under the terms of the GNU General Public License as published by
 13  # the Free Software Foundation; either version 2, or (at your option)
 14  # any later version.
 15  #
 16  # This program is distributed in the hope that it will be useful,
 17  # but WITHOUT ANY WARRANTY; without even the implied warranty of
 18  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 19  # GNU General Public License for more details.
 20  #
 21  # You should have received a copy of the GNU General Public License
 22  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 23  
 24  # As a special exception to the GNU General Public License, if you
 25  # distribute this file as part of a program that contains a
 26  # configuration script generated by Autoconf, you may include it under
 27  # the same distribution terms that you use for the rest of that program.
 28  
 29  # This file is maintained in Automake, please report
 30  # bugs to <bug-automake@gnu.org> or send patches to
 31  # <automake-patches@gnu.org>.
 32  
 33  case "$1" in
 34    '')
 35      echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2
 36      exit 1
 37      ;;
 38    --basedir)
 39      basedir=$2
 40      shift 2
 41      ;;
 42    -h|--h*)
 43      cat <<\EOF
 44  Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
 45  
 46  Wrapper for lex/yacc invocations, renaming files as desired.
 47  
 48    INPUT is the input file
 49    OUTPUT is one file PROG generates
 50    DESIRED is the file we actually want instead of OUTPUT
 51    PROGRAM is program to run
 52    ARGS are passed to PROG
 53  
 54  Any number of OUTPUT,DESIRED pairs may be used.
 55  
 56  Report bugs to <bug-automake@gnu.org>.
 57  EOF
 58      exit $?
 59      ;;
 60    -v|--v*)
 61      echo "ylwrap $scriptversion"
 62      exit $?
 63      ;;
 64  esac
 65  
 66  
 67  # The input.
 68  input="$1"
 69  shift
 70  case "$input" in
 71    [\\/]* | ?:[\\/]*)
 72      # Absolute path; do nothing.
 73      ;;
 74    *)
 75      # Relative path.  Make it absolute.
 76      input="`pwd`/$input"
 77      ;;
 78  esac
 79  
 80  pairlist=
 81  while test "$#" -ne 0; do
 82    if test "$1" = "--"; then
 83      shift
 84      break
 85    fi
 86    pairlist="$pairlist $1"
 87    shift
 88  done
 89  
 90  # The program to run.
 91  prog="$1"
 92  shift
 93  # Make any relative path in $prog absolute.
 94  case "$prog" in
 95    [\\/]* | ?:[\\/]*) ;;
 96    *[\\/]*) prog="`pwd`/$prog" ;;
 97  esac
 98  
 99  # FIXME: add hostname here for parallel makes that run commands on
100  # other machines.  But that might take us over the 14-char limit.
101  dirname=ylwrap$$
102  trap "cd '`pwd`'; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
103  mkdir $dirname || exit 1
104  
105  cd $dirname
106  
107  case $# in
108    0) "$prog" "$input" ;;
109    *) "$prog" "$@" "$input" ;;
110  esac
111  ret=$?
112  
113  if test $ret -eq 0; then
114    set X $pairlist
115    shift
116    first=yes
117    # Since DOS filename conventions don't allow two dots,
118    # the DOS version of Bison writes out y_tab.c instead of y.tab.c
119    # and y_tab.h instead of y.tab.h. Test to see if this is the case.
120    y_tab_nodot="no"
121    if test -f y_tab.c || test -f y_tab.h; then
122      y_tab_nodot="yes"
123    fi
124  
125    # The directory holding the input.
126    input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
127    # Quote $INPUT_DIR so we can use it in a regexp.
128    # FIXME: really we should care about more than `.' and `\'.
129    input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
130  
131    while test "$#" -ne 0; do
132      from="$1"
133      # Handle y_tab.c and y_tab.h output by DOS
134      if test $y_tab_nodot = "yes"; then
135        if test $from = "y.tab.c"; then
136      	from="y_tab.c"
137        else
138      	if test $from = "y.tab.h"; then
139      	  from="y_tab.h"
140      	fi
141        fi
142      fi
143      if test -f "$from"; then
144        # If $2 is an absolute path name, then just use that,
145        # otherwise prepend `../'.
146        case "$2" in
147      	[\\/]* | ?:[\\/]*) target="$2";;
148      	*) target="../$2";;
149        esac
150  
151        # We do not want to overwrite a header file if it hasn't
152        # changed.  This avoid useless recompilations.  However the
153        # parser itself (the first file) should always be updated,
154        # because it is the destination of the .y.c rule in the
155        # Makefile.  Divert the output of all other files to a temporary
156        # file so we can compare them to existing versions.
157        if test $first = no; then
158  	realtarget="$target"
159  	target="tmp-`echo $target | sed s/.*[\\/]//g`"
160        fi
161        # Edit out `#line' or `#' directives.
162        #
163        # We don't want the resulting debug information to point at
164        # an absolute srcdir; it is better for it to just mention the
165        # .y file with no path.
166        #
167        # We want to use the real output file name, not yy.lex.c for
168        # instance.
169        #
170        # We want the include guards to be adjusted too.
171        FROM=`echo "$from" | sed \
172              -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
173              -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
174        TARGET=`echo "$2" | sed \
175              -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
176              -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
177  
178        sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
179            -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
180  
181        # Check whether header files must be updated.
182        if test $first = no; then
183  	if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
184  	  echo "$2" is unchanged
185  	  rm -f "$target"
186  	else
187            echo updating "$2"
188            mv -f "$target" "$realtarget"
189          fi
190        fi
191      else
192        # A missing file is only an error for the first file.  This
193        # is a blatant hack to let us support using "yacc -d".  If -d
194        # is not specified, we don't want an error when the header
195        # file is "missing".
196        if test $first = yes; then
197          ret=1
198        fi
199      fi
200      shift
201      shift
202      first=no
203    done
204  else
205    ret=$?
206  fi
207  
208  # Remove the directory.
209  cd ..
210  rm -rf $dirname
211  
212  exit $ret
213  
214  # Local Variables:
215  # mode: shell-script
216  # sh-indentation: 2
217  # eval: (add-hook 'write-file-hooks 'time-stamp)
218  # time-stamp-start: "scriptversion="
219  # time-stamp-format: "%:y-%02m-%02d.%02H"
220  # time-stamp-time-zone: "UTC"
221  # time-stamp-end: "; # UTC"
222  # End: