1 files changed, 43 insertions, 0 deletions
diff --git a/tests/tools/flex-diff.pl b/tests/tools/flex-diff.pl
new file mode 100755
index 00000000..245e9a1b
--- /dev/null
+++ b/tests/tools/flex-diff.pl
@@ -0,0 +1,43 @@
+#!/usr/bin/perl -w
+use strict;
+use IPC::Run3;
+
+# this file abstracts away from differences due to different hash
+# functions that lead to different orders of features, n-best entries,
+# etc.
+
+die "Usage: $0 file1.txt file2.txt\n" unless scalar @ARGV == 2;
+my $tmpa = "tmp.$$.a";
+my $tmpb = "tmp.$$.b";
+create_sorted($ARGV[0], $tmpa);
+create_sorted($ARGV[1], $tmpb);
+
+my $failed = 0;
+run3 "diff $tmpa $tmpb";
+if ($? != 0) {
+  run3 "diff $ARGV[0] $ARGV[1]";
+  $failed = 1;
+}
+
+unlink $tmpa;
+unlink $tmpb;
+
+exit $failed;
+
+sub create_sorted {
+  my ($in, $out) = @_;
+  open A, "sort $in|" or die "Can't read $in: $!";
+  open AA, ">$out" or die "Can't write $out: $!";
+  while(<A>) {
+    chomp;
+    s/^\s*//;
+    s/\s*$//;
+    my @cs = split //;
+    @cs = sort @cs;
+    my $o = join('', @cs);
+    print AA "$o\n";
+  }
+  close AA;
+  close A;
+}
+