config.func

read_ini () {
local l v hv sect INIsection=()
  (( $# )) || return 1
local iniFile2Read="$1"
  [[ -f $iniFile2Read && -r $iniFile2Read ]] || return 2
  sect=''
  while read -r l; do
   [[ $l =~ ^[[:space:]]*([\#\;]|$) ]] && continue
   if [[ $l =~ ^[[:space:]]*\[([^\]]+)\][[:space:]]*$ ]]; then
    sect=${BASH_REMATCH[1]}
    INIsection+=($sect)
    unset INI${sect}
    declare -A INI${sect}
   elif [[ $sect && $l =~ ^[[:space:]]*([A-Za-z_0-9]+)[[:space:]]*=[[:space:]]*(.*)$ ]]; then
    eval "INI${sect}[${BASH_REMATCH[1]}]='${BASH_REMATCH[2]}'"
   else
    echo 'Wrong ini file format: section ID must preceed any parameters' >&2
    return 3
   fi 
  done <$iniFile2Read
  for sect in ${INIsection[@]}; do 
   for v in $(eval "echo \${!INI$sect[@]}"); do
    hv="INI$sect[$v]"
    eval "$hv=\"$(doMacroSub ${!hv})\""
   done
  done
  for sect in ${INIsection[@]} section; do
   echo -n "unset INI${sect}; "
   declare -p INI${sect} 2>/dev/null
  done
  return 0
}

doMacroSub () {
local ERRC_FUNC_REQUIRE_ARG=1 ERRC_NOTHING_TO_DO=2 ERRC_COMMAND_CANTBE_EVAL=3
 (( $# )) || return $ERRC_FUNC_REQUIRE_ARG
 local v="$@" m o
 [[ $v =~ \{\{.+\}\} ]] || { echo "$v"; return $ERRC_NOTHING_TO_DO; }
 while read -r m; do
  if [[ $m =~ [[:space:]] ]]; then
   o=$(eval "$m" 2>/dev/null) || return $ERRC_COMMAND_CANTBE_EVAL
  elif [[ $m =~ \. ]]; then
   eval "o=\${INI${m%%.*}[${m#*.}]}"
  else
   o="${!m}"
  fi
  v=${v/\{\{$m\}\}/$o}
 done < <(
   sed -r -e 's/\}\}[^{]+\{\{/}}{{/g; s/^[^{]+\{/{/; s/}[^}{]+$/}/; s%\}\}$%%; s%\}\}%\n%g; s%\{\{%%g' -e '/^$/d' <<<"$v" | \
    sort | uniq
         )
 if [[ $v =~ \{\{.+\}\} ]]; then
  doMacroSub $v
  return $?
 else
  echo "$v"
 fi
 return 0
}