#! /bin/sh

gsed=`which gsed 2>/dev/null`
if [ -x "$gsed" ]; then
  sed=$gsed
  ext_opt=-r
else
  sed=sed
  case `uname` in
    Darwin|*BSD)
      ext_opt=-E
      ;;
    *)
      ext_opt=-r
      ;;
  esac
fi

if [ $# != 2 ]; then
  echo "usage: $0 src_file dst_file" > /dev/stderr
  exit 1
fi

src="$1"
dst="$2"

do_xml() {
  $sed -e 's@<_@<@g' -e 's@</_@</@g' "$src" > "$dst.tmp" || exit 1
  mv "$dst.tmp" "$dst" || exit1
}

do_desktop() {
  $sed $ext_opt -e 's@^_(\w+)=@\1=@g' "$src" > "$dst.tmp" || exit 1
  mv "$dst.tmp" "$dst" || exit1
}

case "$src" in
  *.xml.in)
    do_xml
    ;;
  *.desktop.in|*.ini.in)
    do_desktop
    ;;
  *)
    echo "unknown file type: $src" > /dev/stderr
    exit 1
esac