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revision 1.1, Wed May 21 11:31:12 2008 UTC revision 1.1.2.1, Wed May 21 11:31:12 2008 UTC
# Line 0  Line 1 
1    #! /bin/sh
2    # ylwrap - wrapper for lex/yacc invocations.
3    
4    scriptversion=2005-05-14.22
5    
6    # Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004, 2005
7    #   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, write to the Free Software
23    # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
24    # 02110-1301, USA.
25    
26    # As a special exception to the GNU General Public License, if you
27    # distribute this file as part of a program that contains a
28    # configuration script generated by Autoconf, you may include it under
29    # the same distribution terms that you use for the rest of that program.
30    
31    # This file is maintained in Automake, please report
32    # bugs to <bug-automake@gnu.org> or send patches to
33    # <automake-patches@gnu.org>.
34    
35    case "$1" in
36      '')
37        echo "$0: No files given.  Try \`$0 --help' for more information." 1>&2
38        exit 1
39        ;;
40      --basedir)
41        basedir=$2
42        shift 2
43        ;;
44      -h|--h*)
45        cat <<\EOF
46    Usage: ylwrap [--help|--version] INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]...
47    
48    Wrapper for lex/yacc invocations, renaming files as desired.
49    
50      INPUT is the input file
51      OUTPUT is one file PROG generates
52      DESIRED is the file we actually want instead of OUTPUT
53      PROGRAM is program to run
54      ARGS are passed to PROG
55    
56    Any number of OUTPUT,DESIRED pairs may be used.
57    
58    Report bugs to <bug-automake@gnu.org>.
59    EOF
60        exit $?
61        ;;
62      -v|--v*)
63        echo "ylwrap $scriptversion"
64        exit $?
65        ;;
66    esac
67    
68    
69    # The input.
70    input="$1"
71    shift
72    case "$input" in
73      [\\/]* | ?:[\\/]*)
74        # Absolute path; do nothing.
75        ;;
76      *)
77        # Relative path.  Make it absolute.
78        input="`pwd`/$input"
79        ;;
80    esac
81    
82    pairlist=
83    while test "$#" -ne 0; do
84      if test "$1" = "--"; then
85        shift
86        break
87      fi
88      pairlist="$pairlist $1"
89      shift
90    done
91    
92    # The program to run.
93    prog="$1"
94    shift
95    # Make any relative path in $prog absolute.
96    case "$prog" in
97      [\\/]* | ?:[\\/]*) ;;
98      *[\\/]*) prog="`pwd`/$prog" ;;
99    esac
100    
101    # FIXME: add hostname here for parallel makes that run commands on
102    # other machines.  But that might take us over the 14-char limit.
103    dirname=ylwrap$$
104    trap "cd `pwd`; rm -rf $dirname > /dev/null 2>&1" 1 2 3 15
105    mkdir $dirname || exit 1
106    
107    cd $dirname
108    
109    case $# in
110      0) $prog "$input" ;;
111      *) $prog "$@" "$input" ;;
112    esac
113    ret=$?
114    
115    if test $ret -eq 0; then
116      set X $pairlist
117      shift
118      first=yes
119      # Since DOS filename conventions don't allow two dots,
120      # the DOS version of Bison writes out y_tab.c instead of y.tab.c
121      # and y_tab.h instead of y.tab.h. Test to see if this is the case.
122      y_tab_nodot="no"
123      if test -f y_tab.c || test -f y_tab.h; then
124        y_tab_nodot="yes"
125      fi
126    
127      # The directory holding the input.
128      input_dir=`echo "$input" | sed -e 's,\([\\/]\)[^\\/]*$,\1,'`
129      # Quote $INPUT_DIR so we can use it in a regexp.
130      # FIXME: really we should care about more than `.' and `\'.
131      input_rx=`echo "$input_dir" | sed 's,\\\\,\\\\\\\\,g;s,\\.,\\\\.,g'`
132    
133      while test "$#" -ne 0; do
134        from="$1"
135        # Handle y_tab.c and y_tab.h output by DOS
136        if test $y_tab_nodot = "yes"; then
137          if test $from = "y.tab.c"; then
138            from="y_tab.c"
139          else
140            if test $from = "y.tab.h"; then
141              from="y_tab.h"
142            fi
143          fi
144        fi
145        if test -f "$from"; then
146          # If $2 is an absolute path name, then just use that,
147          # otherwise prepend `../'.
148          case "$2" in
149            [\\/]* | ?:[\\/]*) target="$2";;
150            *) target="../$2";;
151          esac
152    
153          # We do not want to overwrite a header file if it hasn't
154          # changed.  This avoid useless recompilations.  However the
155          # parser itself (the first file) should always be updated,
156          # because it is the destination of the .y.c rule in the
157          # Makefile.  Divert the output of all other files to a temporary
158          # file so we can compare them to existing versions.
159          if test $first = no; then
160            realtarget="$target"
161            target="tmp-`echo $target | sed s/.*[\\/]//g`"
162          fi
163          # Edit out `#line' or `#' directives.
164          #
165          # We don't want the resulting debug information to point at
166          # an absolute srcdir; it is better for it to just mention the
167          # .y file with no path.
168          #
169          # We want to use the real output file name, not yy.lex.c for
170          # instance.
171          #
172          # We want the include guards to be adjusted too.
173          FROM=`echo "$from" | sed \
174                -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
175                -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
176          TARGET=`echo "$2" | sed \
177                -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'\
178                -e 's/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]/_/g'`
179    
180          sed -e "/^#/!b" -e "s,$input_rx,," -e "s,$from,$2," \
181              -e "s,$FROM,$TARGET," "$from" >"$target" || ret=$?
182    
183          # Check whether header files must be updated.
184          if test $first = no; then
185            if test -f "$realtarget" && cmp -s "$realtarget" "$target"; then
186              echo "$2" is unchanged
187              rm -f "$target"
188            else
189              echo updating "$2"
190              mv -f "$target" "$realtarget"
191            fi
192          fi
193        else
194          # A missing file is only an error for the first file.  This
195          # is a blatant hack to let us support using "yacc -d".  If -d
196          # is not specified, we don't want an error when the header
197          # file is "missing".
198          if test $first = yes; then
199            ret=1
200          fi
201        fi
202        shift
203        shift
204        first=no
205      done
206    else
207      ret=$?
208    fi
209    
210    # Remove the directory.
211    cd ..
212    rm -rf $dirname
213    
214    exit $ret
215    
216    # Local Variables:
217    # mode: shell-script
218    # sh-indentation: 2
219    # eval: (add-hook 'write-file-hooks 'time-stamp)
220    # time-stamp-start: "scriptversion="
221    # time-stamp-format: "%:y-%02m-%02d.%02H"
222    # time-stamp-end: "$"
223    # End:

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