#!/bin/bash

usage() {
echo  "Usage:"
echo  "$0 <lang> <D-I repository path> <packages_to_ignore>"
}

if [ -z "$3" ]
then
  usage
  exit 1
fi

LANG=$1
DI_COPY=$2

# A few checks about the D-I copy directory
if [ ! -d $DI_COPY ] ; then
  echo $DI_COPY does not exist
  exit 1
fi

if [ ! -d $DI_COPY/.svn ] ; then
  echo No $DI_COPY/.svn directory found
  echo $DI_COPY may not be a copy of Debian Installer SVN repository
  exit 1
fi

if [ ! -f $DI_COPY/packages/languagechooser/debian/po/$LANG.po ] ; then
  echo No translation found for languagechooser in $LANG
  echo Are you sure that $LANG is an existing D-I translation?
  exit 1
fi

DI_COPY=$2

IGNORE=$3

LANG=$1

cd $DI_COPY
cd packages
echo -n Building a list of all packages with i18n material...
pots=$(find . -mindepth 3 -name templates.pot |\
          grep /debian/po/templates.pot\$)
packages=$(echo $pots |\
          sed 's/\.\///g'|\
          sed 's/\/debian\/po\/templates\.pot//g')
echo Done.

CHANGELOG=debian/changelog
RELEASE="unstable"

for i in $packages ; do
  if ! (echo $IGNORE | grep $i >/dev/null 2>&1) ; then
     cd $DI_COPY/packages/$i
    # Line number of the changelog's old date
    LINE=`grep -a "; urgency=" "$CHANGELOG" | grep -n "$RELEASE" | head -n 1 | sed 's/:.*//g'`

     # Date of the last release
     DATE=`grep -a "^ --" "$CHANGELOG" | head -n $LINE | tail -n 1 | sed 's/.*>  //g'`
    OLD_DATE=`date -d "$DATE" +%s`

    DATE2=`grep PO-Revision debian/po/$LANG.po | cut -d ":" -f 2,3 | sed 's/^ //g' | cut -d '\' -f 1`



    # Workaround for some weird date formatting
    if [ ! "`echo "$DATE2" | sed 's/GMT+//g'`" = "$DAT2" ]
    then
	DATE2="`echo "$DATE2" | sed 's/GMT//g'`"
    fi

    if date --date "$DATE2" 2>/dev/null 1>&2 
    then
	NEW_DATE=`date -d "$DATE" +%s`
    fi

    NEW2_DATE=`expr $OLD_DATE - 86400`

    NEW3_DATE=`date -d "$DATE" "+%Y-%m-%d %H:%M+0000"`

    echo $i:
    echo "  Changelog: $DATE == $OLD_DATE"
    echo "     $LANG.po: $DATE2 == $NEW_DATE"
    echo " New $LANG.po: $NEW3_DATE"

    cat debian/po/$LANG.po | sed "s/\"PO-Revision-Date:.*/\"PO-Revision-Date: $NEW3_DATE\\\\n\"/g" >debian/po/$LANG.po.new
    
    mv debian/po/$LANG.po.new debian/po/$LANG.po

  fi
done