#!/bin/bash
# config-getvar -- plugin for @package@
# Copyright (C) 2007,2008,2010-2012 Davide Madrisan <davide.madrisan@gmail.com>

[ -z "$BASH" ] || [ ${BASH_VERSION:0:1} -lt 3 ] &&
 { echo $"this script requires bash version 3 or better" >&2 && exit 1; }

me=(${0##*/} "@version@" "@date@")

[ -r @libdir@/libmsgmng.lib ] ||
 { echo "$me: "$"library not found"": @libdir@/libmsgmng.lib" 1>&2
   exit 1; }
. @libdir@/libmsgmng.lib

# default values:
# - output verbosity
let "verbose = 1"

# load the configuration file(s)
[ -r @libdir@/libcfg.lib ] ||
 { echo "$me: "$"library not found"": @libdir@/libcfg.lib" 1>&2
   exit 1; }
. @libdir@/libcfg.lib

[ -r @libdir@/libtranslate.lib ] ||
 { echo "$me: "$"library not found"": @libdir@/libtranslate.lib" 1>&2
   exit 1; }
. @libdir@/libtranslate.lib

function copying() {
   echo "\
"$"This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License version 2 as published by the
Free Software Foundation.  There is NO warranty; not even for MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE."
}

function version() {
   echo "\
${me[0]} ${me[1]}
Copyright (C) 2004-2008,2010,2011 Davide Madrisan <davide.madrisan@gmail.com>"
}

# $1: optional exit code (default is '1')
function usage() {
   version
   echo "\
"$"Print the value of a given configuration variable"".

"$"Usage"":
 @frontend@ [-C <conf_file>] --eval=<var>

"$"where the above options mean"":
     --eval     "$"Print the value of the configuration variable <var>""
     --colors   "$"Select the theme to be used for the colorized output""
 -C, --config   "$"Use an alternate user configuration file"" <conf_file>""
                "$"Default files:"" $default_cfg_strlist""
                "$"Default user files:"" $default_cfg_user_strlist""

"$"Operation modes"":
 -h, --help     "$"Print this help, then exit""
 -V, --version  "$"Print version number, then exit""
 -q, --quiet    "$"Run in quiet mode""
 -D, --debug    "$"Run in debugging mode (very verbose output)""

"$"Samples"":
 @frontend@ -q -C ${default_cfg_list[0]} --eval=\"logging_dir\"

"$"Report bugs to <davide.madrisan@gmail.com>."

   exit ${1:-1}
}

case $1 in
   --autospec-args-file*)
      if [[ "$1" =~ = ]]; then
         argsfile=`echo $1 | sed 's/^--autospec-args-file=//'`
      else
         argsfile=$2
      fi
      [ -r "$argsfile" ] || notify.error $"cannot read"": \`$argsfile'"
      . $argsfile && rm -f $argsfile
   ;;
esac

for arg in $@; do
   case $arg in
   -h|--help) usage 0 ;;
   -V|--version) version; echo; copying; exit 0 ;;
   esac
done

exec_options=`LC_ALL=C getopt \
   -o C:DqrhV \
   --long eval:,config:,\
debug,quiet,colors:,help,version,\
frontend_opts: \
   -n "$me" -- "$@"`
[ $? = 0 ] || exit 1

notify.debug "[ ${0} ${exec_options} ]\n"
eval set -- "$exec_options"

while :; do
   case $1 in
      --eval)
         autospecvar="$2"; shift ;;
      --colors)
         color_scheme="$2"; shift ;;
      -C|--config)
         cfg_file=$2; shift ;;
      -D|--debug)
         let "verbose = 2" ;;
      -q|--quiet)
         let "verbose = 0" ;;
      -h|--help)
         usage 0 ;;
      -V|--version)
         version; echo; copying; exit 0 ;;
      --) shift; break ;;
      *) notify.error $"unrecognized option"" -- \`$1'" ;;
   esac
   shift
done

for arg in $@; do
   [[ -z "$s_rpm_pck" ]] && s_rpm_pck=$arg ||
      notify.error $"unrecognized option"" -- \`$arg'"
done

notify.enable_colors "$color_scheme"

# config.getvar()
# Parameters:
#    $1 : the configuration file where to look at
#    $2 : the configuration variable to expand
# Description:
#    Expand the configuration variable `$2' looking in the file `$1'
function config.getvar() {
   notify.debug "[ ${0}${exec_options} ]\n"

   local cfg_file="$1"
   local autospecvar="$2"
   local cfg_file_lst

   if [ "$cfg_file" ]; then
      for f in $(ls $cfg_file 2>/dev/null); do
         [ -r "$f" ] ||
            notify.error $"configuration file not found"" -- \`$f'"
      done
      cfg_file_lst="$(ls $cfg_file 2>/dev/null)"
   else
      cfg_file_lst="${default_cfg_list[*]}"
   fi
   notify.debug "cfg_file_lst = \"$cfg_file_lst\""

   unset value autospecvar_val autospecvar_file autospecvar_sed
   autospecvar_sed=$(\
echo "$autospecvar" | sed 's,\[,\\[,g;s,\],\\],g')

   for f in $cfg_file_lst; do
      [ -r $f ] || continue

      confvar_1stline=$(\
sed -n "/^[ \t]*$autospecvar_sed[[]*[0-9]*[]]*=/p" $f)
      if [[ "$confvar_1stline" ]]; then
         autospecvar_file="$f"
         notify.debug "variable \`$autospecvar' found in \`$f'"
         notify.debug "confvar_1stline = \`$confvar_1stline'"

         [ "$verbose" = 0 ] || notify.note "#[$autospecvar_file]"

         confvar_1stline=$(\
sed -n "/^[ \t]*$autospecvar_sed[[]*[0-9]*[]]*=/p" $autospecvar_file)
         notify.debug "confvar_1stline = \`$confvar_1stline'"

         case "$confvar_1stline" in
         *[\[0-9*\]]=*)
            # an entry like: ftp_rw_srpms_dir[0]="/devel/SRPMS"
            case "$autospecvar" in
            *[\[0-9*\]])
               sed -n "/^$autospecvar_sed=/{s|.*|&;|p}" \
                  $autospecvar_file |
               while read line; do notify.note "$line"; done
            ;;
            *) sed -n "/^$autospecvar_sed\[[0-9*]\]=/{s|.*|&;|p}" \
                  $autospecvar_file |
               while read line; do notify.note "$line"; done
            ;;
            esac
         ;;
         *=\"*\"|*=%*|*=[0-9a-zA-Z]*|*=\$*|*=\(*\))
            # entries like:
            # - rpm_macro_make="%make"
            # - rpm_macro_make=%make
            # - ftp_rw_rpms_dir[0]="/devel/RPMS"
            # - arch_list="i586 ppc"
            notify.note "${confvar_1stline};"
         ;;
         *=\(*)
            # a variable like:
            # rpm_approved_licenses=(\
            # ... <list of entries, one per line>
            sed -e '/./{H;$!d;}' -e "x;/$autospecvar_sed=(/!d;" \
               $autospecvar_file |
            while read line; do
               case "$line" in
               \#*|"") ;;
               *\)) notify.note "${line};" ;;
               *) notify.note "$line" ;;
               esac
            done
         ;;
         *=\"\\)
            # a variable like:
            # format_extra_rules="\
            sed -e '/./{H;$!d;}' -e "x;/$autospecvar_sed=\"/!d;" \
               $autospecvar_file |
            while read line; do
               case "$line" in
               \#*|"") ;;
               *\") notify.note "${line};" ;;
               *) notify.note "$line" ;;
               esac
            done
         ;;
         *) notify.error $"(bug)"" -- $FUNCNAME: "$"unknown variable type"
         ;;
         esac
      fi
   done
}

config.getvar "$cfg_file" "$autospecvar"