shtool

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#!/bin/sh
##
##  GNU shtool -- The GNU Portable Shell Tool
##  Copyright (c) 1994-2002 Ralf S. Engelschall <[e-mail]>
##
##  See http://www.gnu.org/software/shtool/ for more information.
##  See ftp://ftp.gnu.org/gnu/shtool/ for latest version.
##
##  Version:  1.6.2 (02-Nov-2002)
##  Contents: 4/19 available modules
##

##
##  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 of the License, 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, or contact Ralf S. Engelschall <[e-mail]>.
##
##  NOTICE: Given that you include this file verbatim into your own
##  source tree, you are justified in saying that it remains separate
##  from your package, and that this way you are simply just using GNU
##  shtool. So, in this situation, there is no requirement that your
##  package itself is licensed under the GNU General Public License in
##  order to take advantage of GNU shtool.
##

##
##  Usage: shtool [<options>] [<cmd-name> [<cmd-options>] [<cmd-args>]]
##
##  Available commands:
##    echo       Print string with optional construct expansion
##    install    Install a program, script or datafile
##    mkdir      Make one or more directories
##    path       Deal with program paths
##
##  Not available commands (because module was not built-in):
##    mdate      Pretty-print modification time of a file or dir
##    table      Pretty-print a field-separated list as a table
##    prop       Display progress with a running propeller
##    move       Move files with simultaneous substitution
##    mkln       Make link with calculation of relative paths
##    mkshadow   Make a shadow tree through symbolic links
##    fixperm    Fix file permissions inside a source tree
##    rotate     Logfile rotation
##    tarball    Roll distribution tarballs
##    subst      Apply sed(1) substitution operations
##    guessos    Simple operating system guesser
##    arx        Extended archive command
##    slo        Separate linker options by library class
##    scpp       Sharing C Pre-Processor
##    version    Maintain a version information file
##

if [ $# -eq 0 ]; then
    echo "$0:Error: invalid command line" 1>&2
    echo "$0:Hint:  run \`$0 -h' for usage" 1>&2
    exit 1
fi
if [ ".$1" = ".-h" -o ".$1" = ".--help" ]; then
    echo "This is GNU shtool, version 1.6.2 (02-Nov-2002)"
    echo "Copyright (c) 1994-2002 Ralf S. Engelschall <[e-mail]>"
    echo "Report bugs to <[e-mail]>"
    echo ''
    echo "Usage: shtool [<options>] [<cmd-name> [<cmd-options>] [<cmd-args>]]"
    echo ''
    echo 'Available global <options>:'
    echo '  -v, --version   display shtool version information'
    echo '  -h, --help      display shtool usage help page (this one)'
    echo '  -d, --debug     display shell trace information'
    echo '  -r, --recreate  recreate this shtool script via shtoolize'
    echo ''
    echo 'Available <cmd-name> [<cmd-options>] [<cmd-args>]:'
    echo '  echo     [-n|--newline] [-e|--expand] [<str> ...]'
    echo '  install  [-v|--verbose] [-t|--trace] [-d|--mkdir] [-c|--copy]'
    echo '           [-C|--compare-copy] [-s|--strip] [-m|--mode <mode>]'
    echo '           [-o|--owner <owner>] [-g|--group <group>] [-e|--exec'
    echo '           <sed-cmd>] <file> [<file> ...] <path>'
    echo '  mkdir    [-t|--trace] [-f|--force] [-p|--parents] [-m|--mode'
    echo '           <mode>] [-o|--owner <owner>] [-g|--group <group>] <dir>'
    echo '           [<dir> ...]'
    echo '  path     [-s|--suppress] [-r|--reverse] [-d|--dirname] [-b|--basename]'
    echo '           [-m|--magic] [-p|--path <path>] <str> [<str> ...]'
    echo ''
    echo 'Not available <cmd-name> (because module was not built-in):'
    echo '  mdate    [-n|--newline] [-z|--zero] [-s|--shorten] [-d|--digits]'
    echo '           [-f|--field-sep <str>] [-o|--order <spec>] <path>'
    echo '  table    [-F|--field-sep <sep>] [-w|--width <width>] [-c|--columns'
    echo '           <cols>] [-s|--strip <strip>] <str><sep><str>...'
    echo '  prop     [-p|--prefix <str>]'
    echo '  move     [-v|--verbose] [-t|--trace] [-e|--expand] [-p|--preserve]'
    echo '           <src-file> <dst-file>'
    echo '  mkln     [-t|--trace] [-f|--force] [-s|--symbolic] <src-path>'
    echo '           [<src-path> ...] <dst-path>'
    echo '  mkshadow [-v|--verbose] [-t|--trace] [-a|--all] <src-dir> <dst-dir>'
    echo '  fixperm  [-v|--verbose] [-t|--trace] <path> [<path> ...]'
    echo '  rotate   [-v|--verbose] [-t|--trace] [-f|--force] [-n|--num-files'
    echo '           <count>] [-s|--size <size>] [-c|--copy] [-r|--remove]'
    echo '           [-a|--archive-dir <dir>] [-z|--compress [<tool>:]<level>]'
    echo '           [-b|--background] [-d|--delay] [-p|--pad <len>] [-o|--owner'
    echo '           <owner>] [-g|--group <group>] [-m|--mode <mode>] [-M|--migrate'
    echo '           <cmd>] [-P|--prolog <cmd>] [-E|--epilog <cmd>] <file> [...]'
    echo '  tarball  [-t|--trace] [-v|--verbose] [-o|--output <tarball>]'
    echo '           [-c|--compress <prog>] [-d|--directory <dir>] [-u|--user'
    echo '           <user>] [-g|--group <group>] [-e|--exclude <pattern>]'
    echo '           <path> [<path> ...]'
    echo '  subst    [-v|--verbose] [-t|--trace] [-n|--nop] [-s|--stealth]'
    echo '           [-i|--interactive] [-b|--backup <ext>] [-e|--exec <cmd>]'
    echo '           [-f|--file <cmd-file>] [<file>] [...]'
    echo '  guessos  '
    echo '  arx      [-t|--trace] [-C|--command <cmd>] <op> <archive> [<file>'
    echo '           ...]'
    echo '  slo      [-p|--prefix <str>] -- -L<dir> -l<lib> [-L<dir> -l<lib>'
    echo '           ...]'
    echo '  scpp     [-v|--verbose] [-p|--preserve] [-f|--filter <filter>]'
    echo '           [-o|--output <ofile>] [-t|--template <tfile>] [-M|--mark'
    echo '           <mark>] [-D|--define <dname>] [-C|--class <cname>]'
    echo '           <file> [<file> ...]'
    echo '  version  [-l|--language <lang>] [-n|--name <name>] [-p|--prefix'
    echo '           <prefix>] [-s|--set <version>] [-e|--edit] [-i|--increase'
    echo '           <knob>] [-d|--display <type>] <file>'
    echo ''
    exit 0
fi
if [ ".$1" = ".-v" -o ".$1" = ."--version" ]; then
    echo "GNU shtool 1.6.2 (02-Nov-2002)"
    exit 0
fi
if [ ".$1" = ".-r" -o ".$1" = ."--recreate" ]; then
    shtoolize -oshtool echo install mkdir path
    exit 0
fi
if [ ".$1" = ".-d" -o ".$1" = ."--debug" ]; then
    shift
    set -x
fi
name=`echo "$0" | sed -e 's;.*/\([^/]*\)$;\1;' -e 's;-sh$;;' -e 's;\.sh$;;'`
case "$name" in
    echo|install|mkdir|path )
        #   implicit tool command selection
        tool="$name"
        ;;
    * )
        #   explicit tool command selection
        tool="$1"
        shift
        ;;
esac
arg_spec=""
opt_spec=""
gen_tmpfile=no

##
##  DISPATCH INTO SCRIPT PROLOG
##

case $tool in
    echo )
        str_tool="echo"
        str_usage="[-n|--newline] [-e|--expand] [<str> ...]"
        arg_spec="0+"
        opt_spec="n.e."
        opt_alias="n:newline,e:expand"
        opt_n=no
        opt_e=no
        ;;
    install )
        str_tool="install"
        str_usage="[-v|--verbose] [-t|--trace] [-d|--mkdir] [-c|--copy] [-C|--compare-copy] [-s|--strip] [-m|--mode <mode>] [-o|--owner <owner>] [-g|--group <group>] [-e|--exec <sed-cmd>] <file> [<file> ...] <path>"
        arg_spec="1+"
        opt_spec="v.t.d.c.C.s.m:o:g:e+"
        opt_alias="v:verbose,t:trace,d:mkdir,c:copy,C:compare-copy,s:strip,m:mode,o:owner,g:group,e:exec"
        opt_v=no
        opt_t=no
        opt_d=no
        opt_c=no
        opt_C=no
        opt_s=no
        opt_m="0755"
        opt_o=""
        opt_g=""
        opt_e=""
        ;;
    mkdir )
        str_tool="mkdir"
        str_usage="[-t|--trace] [-f|--force] [-p|--parents] [-m|--mode <mode>] [-o|--owner <owner>] [-g|--group <group>] <dir> [<dir> ...]"
        arg_spec="1+"
        opt_spec="t.f.p.m:o:g:"
        opt_alias="t:trace,f:force,p:parents,m:mode,o:owner,g:group"
        opt_t=no
        opt_f=no
        opt_p=no
        opt_m=""
        opt_o=""
        opt_g=""
        ;;
    path )
        str_tool="path"
        str_usage="[-s|--suppress] [-r|--reverse] [-d|--dirname] [-b|--basename] [-m|--magic] [-p|--path <path>] <str> [<str> ...]"
        gen_tmpfile=yes
        arg_spec="1+"
        opt_spec="s.r.d.b.m.p:"
        opt_alias="s:suppress,r:reverse,d:dirname,b:basename,m:magic,p:path"
        opt_s=no
        opt_r=no
        opt_d=no
        opt_b=no
        opt_m=no
        opt_p="$PATH"
        ;;
    -* )
        echo "$0:Error: unknown option \`$tool'" 2>&1
        echo "$0:Hint:  run \`$0 -h' for usage" 2>&1
        exit 1
        ;;
    * )
        echo "$0:Error: unknown command \`$tool'" 2>&1
        echo "$0:Hint:  run \`$0 -h' for usage" 2>&1
        exit 1
        ;;
esac

##
##  COMMON UTILITY CODE
##

#   commonly used ASCII values
ASC_TAB="	"
ASC_NL="
"

#   determine name of tool
if [ ".$tool" != . ]; then
    #   used inside shtool script
    toolcmd="$0 $tool"
    toolcmdhelp="shtool $tool"
    msgprefix="shtool:$tool"
else
    #   used as standalone script
    toolcmd="$0"
    toolcmdhelp="sh $0"
    msgprefix="$str_tool"
fi

#   parse argument specification string
eval `echo $arg_spec |\
      sed -e 's/^\([0-9]*\)\([+=]\)/arg_NUMS=\1; arg_MODE=\2/'`

#   parse option specification string
eval `echo h.$opt_spec |\
      sed -e 's/\([a-zA-Z0-9]\)\([.:+]\)/opt_MODE_\1=\2;/g'`

#   parse option alias string
eval `echo h:help,$opt_alias |\
      tr 'x-' 'x_' | sed -e 's/\([a-zA-Z0-9]\):\([^,]*\),*/opt_ALIAS_\2=\1;/g'`

#   interate over argument line
opt_PREV=''
while [ $# -gt 0 ]; do
    #   special option stops processing
    if [ ".$1" = ".--" ]; then
        shift
        break
    fi

    #   determine option and argument
    opt_ARG_OK=no
    if [ ".$opt_PREV" != . ]; then
        #   merge previous seen option with argument
        opt_OPT="$opt_PREV"
        opt_ARG="$1"
        opt_ARG_OK=yes
        opt_PREV=''
    else
        #   split argument into option and argument
        case "$1" in
            --[a-zA-Z0-9]*=*)
                eval `echo "x$1" |\
                      sed -e 's/^x--\([a-zA-Z0-9-]*\)=\(.*\)$/opt_OPT="\1";opt_ARG="\2"/'`
                opt_STR=`echo $opt_OPT | tr 'x-' 'x_'`
                eval "opt_OPT=\${opt_ALIAS_${opt_STR}-${opt_OPT}}"
                ;;
            --[a-zA-Z0-9]*)
                opt_OPT=`echo "x$1" | cut -c4-`
                opt_STR=`echo $opt_OPT | tr 'x-' 'x_'`
                eval "opt_OPT=\${opt_ALIAS_${opt_STR}-${opt_OPT}}"
                opt_ARG=''
                ;;
            -[a-zA-Z0-9]*)
                eval `echo "x$1" |\
                      sed -e 's/^x-\([a-zA-Z0-9]\)/opt_OPT="\1";/' \
                          -e 's/";\(.*\)$/"; opt_ARG="\1"/'`
                ;;
            -[a-zA-Z0-9])
                opt_OPT=`echo "x$1" | cut -c3-`
                opt_ARG=''
                ;;
            *)
                break
                ;;
        esac
    fi

    #   eat up option
    shift

    #   determine whether option needs an argument
    eval "opt_MODE=\$opt_MODE_${opt_OPT}"
    if [ ".$opt_ARG" = . -a ".$opt_ARG_OK" != .yes ]; then
        if [ ".$opt_MODE" = ".:" -o ".$opt_MODE" = ".+" ]; then
            opt_PREV="$opt_OPT"
            continue
        fi
    fi

    #   process option
    case $opt_MODE in
        '.' )
            #   boolean option
            eval "opt_${opt_OPT}=yes"
            ;;
        ':' )
            #   option with argument (multiple occurances override)
            eval "opt_${opt_OPT}=\"\$opt_ARG\""
            ;;
        '+' )
            #   option with argument (multiple occurances append)
            eval "opt_${opt_OPT}=\"\$opt_${opt_OPT}\${ASC_NL}\$opt_ARG\""
            ;;
        * )
            echo "$msgprefix:Error: unknown option: \`$opt_OPT'" 1>&2
            echo "$msgprefix:Hint:  run \`$toolcmdhelp -h' or \`man shtool' for details" 1>&2
            exit 1
            ;;
    esac
done
if [ ".$opt_PREV" != . ]; then
    echo "$msgprefix:Error: missing argument to option \`$opt_PREV'" 1>&2
    echo "$msgprefix:Hint:  run \`$toolcmdhelp -h' or \`man shtool' for details" 1>&2
    exit 1