Add a splitpatch.pl utility, a small script to convert multi-file

patches to several appropriately named single-file patches.

Requested by:	flz

2 files changed, 112 insertions, 0 deletions

diff --git a/Tools/scripts/README b/Tools/scripts/README
index 200de58d33af..9dd53f2de754 100644
--- a/Tools/scripts/README
+++ b/Tools/scripts/README
@@ -33,6 +33,8 @@ prdone  - checks in the port, attempting to fill out the commit message using
 portsearch - A utility for searching the ports tree. It allows more detailed
              search criteria than ``make search key=<string>'' and accepts
              all perl(1) regular expressions.
+splitpatch.pl - A small script to convert multi-file patches to several
+                appropriately named single-file patches.
 tindex - script used to build INDEXes for supported FreeBSD branches, which
          are the source of the 'make fetchindex' INDEXes, and the build
          failure reports on ports@FreeBSD.org
diff --git a/Tools/scripts/splitpatch.pl b/Tools/scripts/splitpatch.pl
new file mode 100755
index 000000000000..9b69c89fb003
--- /dev/null
+++ b/Tools/scripts/splitpatch.pl
@@ -0,0 +1,110 @@
+#! /usr/bin/perl -w
+# ----------------------------------------------------------------------------
+# "THE BEER-WARE LICENSE" (Revision 42)
+# <tobez@FreeBSD.org> wrote this file.  As long as you retain this notice you
+# can do whatever you want with this stuff. If we meet some day, and you think
+# this stuff is worth it, you can buy me a beer in return.   Anton Berezin
+# ----------------------------------------------------------------------------
+#
+# $FreeBSD$
+use strict;
+
+# good tests:
+# /usr/ports/archivers/zoo/files/patch-aa  (context diff)
+# /usr/ports/astro/xplanet/files/patch-aa  (unified with paths)
+
+my ($in,$fl,$abort,$state,$out);
+
+if (!@ARGV || $ARGV[0] =~ /^-/) {
+	print STDERR "Usage:
+	$0 patchfile ...
+"
+}
+
+while (@ARGV) {
+	$in = shift;
+	$state = \&nofile;
+	if (open IN, "< $in") {
+		$abort = 0;
+		$out = "";
+		$fl = "";
+		while (<IN>) {
+			$state->();
+			last if $abort;
+		}
+		close IN;
+		if ($out && !$abort) {
+			print "Wrote $out\n";
+		}
+	} else {
+		print STDERR "cannot open $in: $!\n";
+	}
+}
+
+sub nofile
+{
+	if (/^\*\*\*\s+/ && !/^\*\*\*\s+\d+,\d+\s+/) {
+		$state = \&cstart;
+		$fl = $_;
+	} elsif (/^---\s+/ && !/^---\s+\d+,\d+\s+/) {
+		$state = \&ustart;
+		$fl = $_;
+	}
+}
+
+sub cstart
+{
+	if (!/^---\s+\d+,\d+\s+/ && /^---\s+(\S+)\s+/) {
+		$state = \&body;
+		$out = $1;
+		$out =~ s|/|_|g;
+		$out = "patch-$out";
+		if (open OUT, "> $out") {
+			print OUT $fl;
+			print OUT $_;
+		} else {
+			print STDERR "Cannot create $out: $!, aborting\n";
+			$abort = 1;
+		}
+	} else {
+		print STDERR "Bad context diff in $in, aborting\n";
+		$abort = 1;
+	}
+}
+
+sub ustart
+{
+	if (/^\+\+\+\s+(\S+)\s+/) {
+		$state = \&body;
+		$out = $1;
+		$out =~ s|/|_|g;
+		$out = "patch-$out";
+		if (open OUT, "> $out") {
+			print OUT $fl;
+			print OUT $_;
+		} else {
+			print STDERR "Cannot create $out: $!, aborting\n";
+			$abort = 1;
+		}
+	} else {
+		print STDERR "Bad unified diff in $in, aborting\n";
+		$abort = 1;
+	}
+}
+
+sub body
+{
+	if (/^\*\*\*\s+/ && !/^\*\*\*\s+\d+,\d+\s+/) {
+		close OUT;
+		print "Wrote $out\n";
+		$state = \&cstart;
+		$fl = $_;
+	} elsif (/^---\s+/ && !/^---\s+\d+,\d+\s+/) {
+		close OUT;
+		print "Wrote $out\n";
+		$state = \&ustart;
+		$fl = $_;
+	} else {
+		print OUT $_;
+	}
+}