#!/bin/bash

if [ -n "$1" ]; then
  PACKAGESUFFIX="$1"
else
  PACKAGESUFFIX="custom"
fi

TARGETDIR="../exim4-config-$PACKAGESUFFIX"
#DEBUG=1

# copy over -changelog, generating a proper changelog entry
# copy over update-exim4defaults, ip-up.d, email-addresses

dh_testdir

set -e

copytextreplace() {
  FILE="$1"
  DSTFILE="$2"
  DIR="${FILE%/*}"
  FILE="${FILE##*/}"
  if [ -z "$DSTFILE" ]; then
    DSTFILE="$FILE"
  fi
  [ $DEBUG ] && echo >&2 "DBG: source $DIR/$FILE"
  [ $DEBUG ] && echo >&2 "DBG: dst    $TARGETDIR/$DIR/$DSTFILE"
  mkdir -p $TARGETDIR/$DIR
  if ! [ -e "$TARGETDIR/$DIR/$FILE" ]; then
    < $DIR/$FILE \
       sed -e "s/exim4-config/exim4-config-$PACKAGESUFFIX/g" \
           -e "s/orig-exim4-config-$PACKAGESUFFIX/exim4-config/g" \
    > $TARGETDIR/$DIR/$DSTFILE
    chmod --reference=$DIR/$FILE $TARGETDIR/$DIR/$DSTFILE
  else
    echo >&2 "ERR: can't write to $TARGETDIR/$DIR/$DSTFILE, file exists"
    exit 1
  fi
}

for file in manpages config templates postinst postrm dirs; do
  copytextreplace debian/exim4-config.$file exim4-config-$PACKAGESUFFIX.$file
done

for file in `cat debian/exim4-config.manpages` \
            `find debian/debconf \( -path '*/.svn/*' -prune \) -or \( -type f -print \)`; do
  copytextreplace $file
done

for file in compat control copyright rules install; do
  copytextreplace debian/config-custom/debian/$file
done

for file in ip-up.d update-exim4defaults email-addresses; do
  copytextreplace debian/$file
done

# manual corrections in target directory

mv $TARGETDIR/debian/config-custom/debian/* $TARGETDIR/debian
rm -rf $TARGETDIR/debian/config-custom
chmod 775 $TARGETDIR/debian/rules

# hack changelog

< debian/changelog sed -n "/^exim4/{s/exim4/exim4-config-$PACKAGESUFFIX/p;q;}" > $TARGETDIR/debian/changelog
echo -e "\n  * automatically generated changelog" >> $TARGETDIR/debian/changelog
< debian/changelog sed -n '/^ --/{p;q;}' >> $TARGETDIR/debian/changelog
cd $TARGETDIR
dch --append "generated source package by create-custom-package"