Re: [Autogen-users] AutoOpts: Portable Script

[Bruce K. <bru...@gm...>]

On 08/08/12 23:39, Manuel H wrote:
> Hello!
>
> Currently i'm struggling with creating a portable shell-script out of my
> options-definition file. Here is my options.def file:
>
> [...]
>
> When calling autogen with my definitions-file as only option, AutoGen
> should write the generated shell script to standard output -- if i
> interpret the text in the first paragraph of chapter 7.12.2 of the
> AutoGen manual correctly.
>
> My second attempt was to use getdefs, but this will result in an error:
>
> 	getdefs input=options.def

"getdefs" is for extracting special markup comments into autogen definitions.
Your "options.def" file is already in autogen definitions format.
So, no, that won't work.

WRT creating a shell script to parse options, perhaps it isn't clear enough.
You must go through several steps:

1.  generate C source
2.  compile a program that emits the shell script
3.  run that program
4.  incorporate the resulting output into your script.

That would be:

$ autogen joiner-opts.def
   # NOTE: do not use options.def as "options.h" conflicts
   # note to self:  fix this
$ cc -o gen-joiner-opts -DTEST_JOINER_OPTS joiner-opts.c $(
     autoopts-config cflags ldflags)
$ ./gen-joiner-opts -o joiner-opts.sh
$ cat joiner-opts.sh

#! /bin/bash
# # # # # # # # # # -- do not modify this marker --
#
#  DO NOT EDIT THIS SECTION OF joiner-opts.sh
#
#  From here to the next `-- do not modify this marker --',
#  the text has been generated Thursday August  9, 2012 at 07:34:59 AM PDT
#  From the JOINER option definitions
#
JOINER_LONGUSAGE_TEXT='joiner - File joiner
USAGE:  joiner [ <option-name>[{=| }<val>] ]...
    Arg Option-Name    Description
    Fil basefile       The basefile...
    no  help           Display extended usage information and exit

All arguments are named options.'

JOINER_USAGE_TEXT='joiner - File joiner
USAGE:  joiner [ <option-name>[{=| }<val>] ]...
    Arg Option-Name    Description
    Fil basefile       The basefile...
    no  help           Display extended usage information and exit

All arguments are named options.'


JOINER_BASEFILE=${JOINER_BASEFILE}
JOINER_BASEFILE_set=false
export JOINER_BASEFILE

OPT_ARG=$1
while [ $# -gt 0 ]
do
     OPT_ELEMENT=''
     OPT_ARG_VAL=''
     OPT_ARG=${1}
         OPT_CODE=`echo "X${OPT_ARG}"|sed 's/^X-*//'`
         shift
         OPT_ARG=$1
         case "${OPT_CODE}" in *=* )
             OPT_ARG_VAL=`echo "${OPT_CODE}"|sed 's/^[^=]*=//'`
             OPT_CODE=`echo "${OPT_CODE}"|sed 's/=.*$//'` ;; esac
         case "${OPT_CODE}" in
         'ba' | \
         'bas' | \
         'base' | \
         'basef' | \
         'basefi' | \
         'basefil' | \
         'basefile' )
             if [ -n "${JOINER_BASEFILE}" ] && ${JOINER_BASEFILE_set} ; then
                 echo Error:  duplicate BASEFILE option >&2
                 echo "$JOINER_USAGE_TEXT"
                 exit 1 ; fi
             JOINER_BASEFILE_set=true
             OPT_NAME='BASEFILE'
             OPT_ARG_NEEDED=YES
             ;;

         'he' | \
         'hel' | \
         'help' )
             echo "$JOINER_LONGUSAGE_TEXT"
             exit 0
             ;;
[....]