Add script to remove binary diffs

Once upon a time, the kernel was just a series of patches. These days,
git manages most of the kernel. git can do many useful things, such as
maintain binary files. Binary file changes are not easily expressed in
patches and can't be applied without using git. Remove the binary diffs
from any snapshot or -rc patches. We will eventually pick up the
changes/deletions in the final release tarball.

kernel.spec

@@ -409,7 +409,7 @@ Source0: ftp://ftp.kernel.org/pub/linux/kernel/v4.x/linux-%{kversion}.tar.xz
 
 Source10: perf-man-%{kversion}.tar.gz
 Source11: x509.genkey
-
+Source12: remove-binary-diff.pl
 Source15: merge.pl
 Source16: mod-extra.list
 Source17: mod-extra.sh
@@ -1118,17 +1118,19 @@ if [ ! -d kernel-%{kversion}%{?dist}/vanilla-%{vanillaversion} ]; then
     cp -al vanilla-%{kversion} vanilla-%{vanillaversion}
     cd vanilla-%{vanillaversion}
 
+cp %{SOURCE12} .
+
 # Update vanilla to the latest upstream.
 # (non-released_kernel case only)
 %if 0%{?rcrev}
-    xzcat %{SOURCE5000} | patch -p1 -F1 -s
+    xzcat %{SOURCE5000} | ./remove-binary-diff.pl | patch -p1 -F1 -s
 %if 0%{?gitrev}
-    xzcat %{SOURCE5001} | patch -p1 -F1 -s
+    xzcat %{SOURCE5001} | ./remove-binary-diff.pl | patch -p1 -F1 -s
 %endif
 %else
 # pre-{base_sublevel+1}-rc1 case
 %if 0%{?gitrev}
-    xzcat %{SOURCE5000} | patch -p1 -F1 -s
+    xzcat %{SOURCE5000} | ./remove-binary-diff.pl | patch -p1 -F1 -s
 %endif
 %endif
     git init
@@ -2140,6 +2142,9 @@ fi
 #
 #
 %changelog
+* Wed Oct 12 2016 Laura Abbott <labbott@redhat.com>
+- Add script to remove binary diffs
+
 * Wed Oct 12 2016 Laura Abbott <labbott@redhat.com> - 4.9.0-0.rc0.git7.1
 - Linux v4.8-14109-g1573d2c
 - Drop the extra parallel build optiosn from perf since perf does that on

remove-binary-diff.pl

@@ -0,0 +1,32 @@
+#!/usr/bin/perl -w
+# A script to remove those terrible binary diffs from the patches which
+# screw up everything and rain on my parade.
+
+use strict;
+
+my @args=@ARGV;
+my @current_patch;
+my $is_binary = 0;
+my $cnt = 0;
+
+while(my $row = <>) {
+	# diff marks the start of a new file to check
+	if ($row =~ /^diff --git.*?(\S+)$/) {
+		if (!$is_binary) {
+			foreach my $line (@current_patch) {
+				print $line;
+			}
+		}
+		$is_binary = 0;
+		@current_patch = ();
+	} elsif ($row =~ /Binary files (.)* differ$/) {
+		$is_binary = 1;
+	}
+	push (@current_patch, $row);
+}
+
+if (!$is_binary) {
+	foreach my $line (@current_patch) {
+		print $line;
+	}
+}