xref: /trunk/main/solenv/bin/patch_sanitizer.pl (revision cdf0e10c)

:
eval 'exec perl -wS $0 ${1+"$@"}'
    if 0;
#*************************************************************************
#
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# Copyright 2000, 2010 Oracle and/or its affiliates.
#
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#
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#
# OpenOffice.org is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# only, as published by the Free Software Foundation.
#
# OpenOffice.org is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License version 3 for more details
# (a copy is included in the LICENSE file that accompanied this code).
#
# You should have received a copy of the GNU Lesser General Public License
# version 3 along with OpenOffice.org.  If not, see
# <http://www.openoffice.org/license.html>
# for a copy of the LGPLv3 License.
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#*************************************************************************

use utf8;
use warnings;
use strict;

# command line arguments
my $oldpatchfile = shift;
my $newpatchfile = shift;
my $sortedfile = shift;

show_help() unless defined $oldpatchfile and defined $newpatchfile and defined $sortedfile;

my %oldpatchfile = parse_patch($oldpatchfile);
my %newpatchfile = parse_patch($newpatchfile);

open SORTEDPATCH, "> $sortedfile";

foreach my $file (sort (keys %newpatchfile)) {
	print SORTEDPATCH $file."\t";
	if (defined($oldpatchfile{$file})) {
		if ( (join '', @{$oldpatchfile{$file}{'data'}}) eq (join '', @{$newpatchfile{$file}{'data'}}) ) {
			# patch data for the file hasn't been modified, use the header from
			# the old patch, to reduce noise (keep the old timestamps)
			print SORTEDPATCH $oldpatchfile{$file}{'origtimestamp'}."\n";
			print SORTEDPATCH $oldpatchfile{$file}{'patchedfilename'}."\t";
			print SORTEDPATCH $oldpatchfile{$file}{'patchedtimestamp'}."\n";
			print SORTEDPATCH @{$oldpatchfile{$file}{'data'}};
			next;
		}
	}
	# either file wasn't patched before, or the patchset changed, so use the new
	# values for it..
	print SORTEDPATCH $newpatchfile{$file}{'origtimestamp'}."\n";
	print SORTEDPATCH $newpatchfile{$file}{'patchedfilename'}."\t";
	print SORTEDPATCH $newpatchfile{$file}{'patchedtimestamp'}."\n";
	print SORTEDPATCH @{$newpatchfile{$file}{'data'}};
}
close SORTEDPATCH;

###############
# Helper subs
###############
sub show_help {
	print "Usage: $0 oldpatch newpatch outputfilename\n";
	print "oldpatch and newpatch can be the very same file\n";
	print "will output a sanitized form of newpatch to outputfilename\n";
	print "if outputfilename is '-', the patch will be printed to stdout\n";
	print "sanitized means: It will avoid all unnecessary changes\n";
	exit 1;
}
sub parse_patch {
	my $patchfile = shift;
	my $patchtype;
	my $pfirst;
	my $psecond;

	my %hunks = ();
	my $origfilename;
	open PATCHFILE, "< $patchfile" or die "Cannot open file $patchfile $!";
	my @patchfile = <PATCHFILE>;
	close PATCHFILE;
	return %hunks if ( $#patchfile == -1 );
	if ( $patchfile[0] =~ /^---/ ) {
		$patchtype = "unified";
		$pfirst = '^--- [^\*]*$';
		$psecond = '^\+\+\+ [^\*]*$';
	} elsif ( $patchfile[0] =~ /^\*\*\*/ ) {
		$patchtype = "content";
		$pfirst = '^\*\*\* [^\*]*$';
		$psecond = '^--- .*\t.*$';
	} else {
		die "unknown patch format\n";
	}

	foreach (@patchfile) {
		if ( /$pfirst/ ) {
			my $timestamp;
			# extract the filename, to be able to compare the old
			# with the new file...
			($origfilename, $timestamp) = split(/\t/, $_, 2);
			chomp $timestamp;
			# ideally convert the timestamp to iso-format...
			$hunks{$origfilename}{'origtimestamp'} = $timestamp;
			next;
		} elsif ( $_ =~ /$psecond/ ) {
			my ($filename, $timestamp) = split(/\t/, $_, 2);
			chomp $timestamp;
			# ideally convert the timestamp to iso-format...
			$hunks{$origfilename}{'patchedfilename'} = $filename;
			$hunks{$origfilename}{'patchedtimestamp'} = $timestamp;
			next;
		}
		push (@{$hunks{$origfilename}{'data'}}, $_);

	}
	return %hunks;
}