Annotation of tme/ylwrap, revision 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:

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