hg_heads=`hg log -r"$HG_NODE:tip and head() and not branch('default")" --template='{node}n'`
for hg_head in $hg_heads; do
  if [ "$(hg diff -r"head() and branch('default')" -r$hg_head CONFIGFILENAME)" != "" ]; then
    echo "Config files differ. Please make sure default has the same config file as your other heads!"
    exit 1
  fi
done
exit 0

defaulthead=$(hg log -r"head() and branch('default')")
for head in $(hg log -r"head() and not branch('default')"); do
  if [ "$(hg diff -r$head -r$defaulthead)" != "" ]; then
    echo "Different config file for $head"
  fi
done