#!/bin/sh

old="$2"
new="$3"

# fail if we add any new lines to C or Scheme source containing a tab
git diff --name-only "$old" "$new" |\
    egrep '\.(cpp|h|scm|sld|stub)$' |\
    xargs -d'\n' git diff -U0 "$old" "$new" -- |\
    grep -q $'^+.*\t' && exit 1