libs/config.lunar

#!/bin/bash
############################################################
#                                                          #
# This code is written for Lunar Linux, see                #
# http://lunar-linux.org                                   #
#                                                          #
############################################################
#                                                          #
# $FUNCTIONS/config                                        #
# set_config, get_config, unset_config                     #
# set_local_config, get_local_config, unset_local_config   #
# set_module_config, get_module_config, unset_module_config#
#                                                          #
############################################################
#                                                          #
# Copyrighted Auke Kok 2004 under GPLv2                    #
#                                                          #
############################################################


set_config() {
  local LINE NEW FILE VAR
  debug_msg "set_config ($@)"

  FILE=$1
  VAR=$(trim "$2")
  LINE=$(grep -w "$VAR=.*" "$FILE")

  shift 2
  if [ "$FILE" == "$LOCAL_CONFIG" ] ; then
    NEW="$(printf "%16s" "$VAR")=\"$@\""
  else
    NEW="$VAR=\"$@\""
  fi

  # on-demand creation
  if [ ! -f $FILE ] ; then
    touch $FILE
  fi

  lock_file $FILE &&
  if [ -n "$LINE" ] ; then
    sedit "/^\s*$VAR=/d" $FILE
  fi
  echo "$NEW" >> $FILE
  unlock_file $FILE
}


unset_config() {
  debug_msg "unset_config ($@)"

  # on-demand creation
  if [ ! -f $1 ] ; then
    touch $1
  fi

  lock_file $1 &&
  if [ -n "$2" ] ; then
    # make sure we escape those ':' characters:
    sedit "/^[ ]*$2=/d" $1
  fi
  unlock_file $1
}


get_config() {
  if [[ -f $1 ]] ; then
    grep -w "$2=.*" "$1" | cut -d= -f2- | sed -e 's/^"//' -e 's/"$//'
  fi
}


set_local_config() {
  debug_msg "set_local_config ($@)"
  local VAR
  VAR=$1
  shift
  set_config "$LOCAL_CONFIG" "$VAR" "$@"
}


unset_local_config() {
  debug_msg "unset_local_config ($@)"
  unset_config "$LOCAL_CONFIG" "$1"
}


get_local_config() {
  get_config "$LOCAL_CONFIG" "$1"
}


set_module_config() {
  debug_msg "set_module_config ($@)"
  if [ -n "$MODULE" ] ; then
    set_config "$DEPENDS_CONFIG/$MODULE" "$1" "$2"
  fi
}


unset_module_config() {
  debug_msg "unset_module_config ($@)"
  if [ -n "$MODULE" ] ; then
    unset_config "$DEPENDS_CONFIG/$MODULE" "$1"
  fi
}


get_module_config() {
  debug_msg "get_module_config ($@)"
  if [ -n "$MODULE" ] ; then
    get_config "$DEPENDS_CONFIG/$MODULE" "$1"
  fi
}


get_other_module_config() {
  debug_msg "get_other_module_config ($@)"
  if [ -n "$1" ] ; then
    get_config "$DEPENDS_CONFIG/$1" "$2"
  fi
}

# function : trim
# usage    : trim <string>
# purpose  : remove leading and trailing whitespaces from a string
trim() {
  local str="$*"

  str="${str#"${str%%[![:space:]]*}"}"
  str="${str%"${str##*[![:space:]]}"}"

  printf "%s" "$str"
}