Script to reorder strings based on a file pattern

reorder-properties.sh

#!/bin/bash
 
# This script allow reorder of strings from a foreign .properties file
# based on the en-US file and keeping original comments
 
#en-US basefile
prop_base_file='/home/antoine/Dev/nightingale-l10n/locales/en-US/songbird/songbird.properties'

for lang_code in $(cat /home/antoine/Dev/songbird-l10n/shipped-locales)
do

  prop_cur_file='/home/antoine/Dev/songbird-l10n/locales/'$lang_code'/songbird/songbird.properties'
  prop_new_file='/home/antoine/Dev/songbird-l10n/locales/'$lang_code'/songbird/songbird.properties.new'

  # Read all lines of base file
  while read line
  do
    mavar=`echo -e "$line"`
    mavar2=`echo "$mavar" | sed 's!^\([^=]*\)=.*$!\1!'`
    checkcomm=`echo "$mavar2" | cut -c 1-1`
    # Check if we have a comment
    if [ "$checkcomm" == "#" ]
    then
      mavar3="$mavar2"
      echo "comment "$mavar3
      echo $mavar3 >> $prop_new_file
    else
      mavar3="$mavar2""="
    fi
    # Check if we have an empty line
    if [ "$checkcomm" == "" ]
    then
      echo "" >> $prop_new_file
    fi
    cat $prop_cur_file | grep ^"$mavar3" >> $prop_new_file
  done < $prop_base_file
 
done