Annotation of tme/ylwrap, revision 1.1.1.1

1.1       root        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:

unix.superglobalmegacorp.com